Port Channels and LACP
Port Channel Introduction
Arista’s switching platforms support industry-standard link aggregation protocols. Arista switches optimize traffic throughput by using MAC addressing, IP addressing, and services fields to effectively load share traffic across aggregated links. Managers can configure multiple ports into a logical port channel, either statically or dynamically through the IEEE Link Aggregation Control Protocol (LACP). Various negotiation modes are supported to accommodate different configurations and peripheral requirements, including LACP fallback to support devices that need simple network connectivity to retrieve images or configurations prior to engaging port channel aggregation modes.
Arista’s Multi-chassis Link Aggregation protocol (MLAG) supports LAGs across paired Arista switches to provide both link aggregation and active/active redundancy.
Port Channel Conceptual Overview
Channel Groups and Port Channels
A port channel is a communication link between two switches supported by matching channel group interfaces on each switch. A port channel is also referred to as a Link Aggregation Group (LAG). Port channels combine the bandwidth of multiple Ethernet ports into a single logical link.
A channel group is a collection of Ethernet interfaces on a single switch. A port channel interface is a virtual interface that serves a corresponding channel group and connects to a compatible interface on another switch to form a port channel. Port channel interfaces can be configured and used in a manner similar to Ethernet interfaces. Port channel interfaces are configurable as Layer 2 interfaces, Layer 3 (routable) interfaces, and VLAN members. Most Ethernet interface configuration options are also available to port channel interfaces.
Port Channel Subinterfaces
Port channel subinterfaces divide a single port channel interface into multiple logical L3 interfaces based on the 802.1q tag (VLAN ID) of incoming traffic. Subinterfaces are commonly used in the L2/L3 boundary device, but they can also be used to isolate traffic with 802.1q tags between L3 peers by assigning each subinterface to a different VRF.
For further details about subinterfaces, see Subinterfaces.
Link Aggregation Control Protocol (LACP)
The Link Aggregation Control Protocol (LACP), described by IEEE 802.3ad, defines a method for two switches to automatically establish and maintain link aggregation groups (LAGs, also called channel groups or port channels). Using LACP, a switch can configure LACP-compatible ports into a dynamic LAG. The ports try to complete LACP negotiation automatically with the linked ports (also configured as a dynamic LAG) on the partner switch. The maximum number of ports per LAG varies by platform; numbers for each platform in the latest EOS release are available here: https://www.arista.com/en/support/product-documentation/supported-features.
Static LAGs
In static mode (with the channel-group mode configured as on on the member interfaces), the switch aggregates links without an awareness of LAGs on the partner switch and without LACP negotiation. The member ports do not send LACP packets or process inbound LACP packets on static LAGs. Packets may drop when static LAG configurations differ between switches.
Dynamic LAGs
- Active interfaces send LACP Protocol Data Units (LACP PDUs) at a rate of one per second when forming a channel with an interface on the peer switch. An aggregate forms if the peer runs LACP in active or passive mode.
- Passive interfaces only send LACP PDUs in response to PDUs received from the partner. The partner switch must be in active mode and initiates negotiation by sending a LACP packet. The passive mode switch receives and responds to the packet to form a LAG.
An active interface can form port channels with passive or active partner interfaces, but port channels are not formed when the interface on each switch is passive.
Table 1 summarizes the effect of different LACP mode combinations:
| Switch 1 | Switch 2 | Comments |
|---|---|---|
| active | active | Links aggregate when LACP negotiation is successful. |
| active | passive | Links aggregate when LACP negotiation is successful. |
| passive | passive | Links do not aggregate because LACP negotiation is not initiated. |
| on (static) | on (static) | Links aggregate without LACP. |
| on (static) | active or passive | Links aggregate on the static switch without LACP; links do not aggregate on the other switch, and no port-channel connection is established with the partner. |
During synchronization, interfaces in dynamic LAGs transmit one LACP PDU per second. After synchronization is complete, interfaces exchange one PDU every thirty seconds, facilitated by a default timeout of 30 seconds and a failure tolerance of three. Under these parameters, when the switch does not receive a LACP PDU for an interface during a ninety-second period, it records the partner interface as failed and removes the interface from the port channel.
Fallback Mode
An active interface that is not in fallback mode does not form a LAG until it receives PDUs from, and negotiates with its peer. Fallback mode allows an active LACP interface to maintain a LAG without receiving PDUs from its peer. The fallback timer specifies the period the LAG waits to receive a peer PDU. Upon timer expiry, the port channel reverts to its configured fallback mode if one is configured.
Static fallback: the port channel maintains one active port while in fallback mode; all its other member ports are in standby mode until a LACP PDU is received by the port channel. All member ports send (and can receive) LACP PDUs, but only the active port sends or receives data.
Individual fallback: all member ports act as individual switch ports while in fallback mode. Individual port configuration (rather than port channel configuration) is active while the port channel is in fallback mode, with the exception of ACLs. This includes VLAN membership. All member ports send and receive data, and continue to send LACP PDUs. As soon as a LACP PDU is received by a member of the port channel, all ports revert to normal port-channel operation.
The switch uses a link aggregation hash algorithm to determine the forwarding path within a link aggregation group. The IP and MAC header fields can be selected as components of the hash algorithm.
Port Channel Mirroring
EOS supports Port Channels as mirroring destinations for both ingress and egress source directions. Traffic mirrors to a port channel and load-balances based on the global port channel load balancing configuration.
Configure port channel members as a mirroring source port for both ingress and egress source directions. A port channel has higher privileges in mirroring source membership than its members. When configuring a port channel and members as mirroring source ports, only the port channel source port becomes active.
Port Channel Configuration Procedures
Configuring a Channel Group
Creating a Channel Group
The channel-group command assigns the configuration-mode Ethernet interfaces to a channel group, creates the channel group if it does not already exist, and specifies LACP attributes for the channel.
Channel groups are associated with a port channel interface immediately upon their creation. A command that creates a new channel group also creates a port channel with a matching ID. The port channel is configured in port-channel configuration mode. Configuration changes to a port channel interface propagate to all Ethernet interfaces in the corresponding channel group.
LACP is enabled on the member interfaces by setting the channel-group mode to active or passive. Setting the mode to on disabled LACP on the member interfaces and creates a static channel group.
Example
switch(config)# interface ethernet 1-2
switch(config-if-Et1-2)# channel-group 10 mode active
switch(config-if-Et1-2)#
Adding an Interface to a Channel Group
The channel-group command is also used to add the configuration mode interface to an existing channel group. When adding channels to a previously created channel group, the channel-group mode for the new channel must match the mode for the existing group.
Example
switch(config)# interface ethernet 7-10
switch(config-if-Et7-10)# channel-group 10 mode active
switch(config-if-Et7-10)#Removing an Interface from a Channel Group
The no channel-group command removes the configuration mode interface from the specified channel group. Deleting all members of a channel group does not remove the associated port channel interface from running-config.
Example
switch(config)# interface ethernet 8
switch(config-if-Et8)# no channel-group
switch(config-if-Et8)#Configuring a Port-Channel as Mixed-Speed
By default, only configured members of the same speed become active. The port-channel speed mixed command configures a port channel with the ability to have active members of multiple speeds.
switch(config)# interface port-channel 1
switch(config-if-Po1)# port-channel speed mixed
Configuring Minimum Links
Configuring Minimum Speed
The port-channel speed minimumcommand specifies the cumulative minimum speed of all active members in order for a port channel to become active. If there is less than the specified by this command, the port channel interface does not become active.
Example
These command sets 100 Gbps as the minimum speed needed for port channel 1 to become active.
switch(config)# interface port-channel 1
switch(config-if-Po1)# port-channel speed minimum 100 gbps
Deleting a Channel Group
A channel group is deleted by removing all Ethernet interfaces from the channel group. A channel group’s LACP mode can be changed only by deleting the channel group and then creating an equivalent group with a different LACP mode. Deleting a channel group by removing all Ethernet interfaces from the group preserves the port channel interface and its configuration settings.
View running-config to verify the deletion of all Ethernet interfaces from a channel group.
Configuring a Port Channel Interface
Creating a Port Channel Interface
- creating a channel group simultaneously creates an associated port channel.
- the interface port-channel command creates a port channel without assigning Ethernet channels to the new interface.
The interface port-channel command places the switch in interface-port channel configuration mode.
switch(config)# interface port-channel 8
switch(config-if-Po8)#
Deleting a Port Channel Interface
The no interface port-channel command deletes the configuration mode port channel interface and removes the channel group assignment for each Ethernet interface assigned to the group associated with the port channel interface. Removing all Ethernet interfaces from a channel group does not remove the associated port channel interface from running-config.
Configuring Port Channel Mirroring
Port Channels can be configured as a mirroring destination or a mirroring source.
Configuring a Port Channel as a Mirroring Destination
Use the following command to configure a port channel as a mirroring destination:
switch(config)#monitor session 1 destination Port-Channel 1Unconfigured port channel interfaces can be configured as mirroring destinations, but do not become active until after configuring the port channel. Use the show monitor session to display the status of the configured mirroring destination.
Configuring a Port Channel as a Mirroring Source
Configure an interface member, Ethernet3/3/1 and Ethernet4/32/1, of a port channel as a mirroring source interface, with the session name, testmember:
switch#show Port-Channel 10
Port Channel Port-Channel10:
Active Ports: Ethernet4/32/1 Ethernet3/3/1
switch(config)#monitor session testmember source et3/3/1
switch(config)#monitor session testmember source et4/32/1
switch(config)#monitor session testmember destination po1Configuring a new monitor session testlag with the port channel interface as a mirroring source inactivates previously the port-channel member testmember monitor session.
switch(config)#monitor session testlag source po10
switch(config)#monitor session testlag destination et5/22/1Use the show monitor session to display the status of the configured mirroring sources. Port channel member now displays a status of inactive.
switch(config)#show monitor session
Session testlag
------------------------
Source Ports:
Both: Po10
Destination Ports:
Et5/22/1 : active
Session testmember
------------------------
Source Ports:
Both: Et4/32/1
Inactive: Et3/3/1 ( Lag configured as source )
Destination Ports:
Po1 : activeRemoving port channel member Et3/3/1 from port channel 10 reactivates the interface as a mirroring source interface.
switch(config)#interface ethernet 3/3/1
switch(config-if-Et3/3/1)#no channel-group 10
switch(config-if-Et3/3/1)#exit
switch(config)#show port-channel 10
Port Channel Port-Channel10:
Active Ports: Ethernet4/32/1Interface Et3/3/1 no longer displays as an inactive port in the show monitor session output.
switch(config)#show monitor session
Session testlag
-----------------------
Source Ports:
Both: Po10
Destination Ports:
Et5/22/1 : active
Session testmember
----------------------
Source Ports:
Both: Et3/3/1, Et4/32/1
Destination Ports:
Po1 : activeDisplaying Port Channel Mirroring Information
Use the following command to display information about mirroring to a destination:
switch#show Port-Channel 1
Port Channel Port-Channel1
Active Ports: Ethernet1/1
switch#show monitor session
Session 1
------------------------
Source Ports:
Destination Ports:
Po1 : activeUse the following command to display information about mirroring to a source:
switch#show monitor session
Session testmember
------------------------
Source Ports:
Both: Et3/3/1, Et4/32/1
Destination Ports:
Po1 : activeMaximum Port Channel ID Increase
Previously, the maximum valid port channel ID was equal to the maximum number of port channels configurable on the system, 2000, and this feature increases the maximum ID to 999,999 while maintaining the same limit of 2000 port channels on the system.
Configuration
switch(config)# interface create port-channel 2001
Port channel config limit 2000 reached. No interfaces were created.
switch(config-ifEtX)# channel-group 2001 mode
Port channel config limit 2000 reached. No interfaces were created.
Show Commands
switch(config)# show lacp 1-$ aggregates
Port channel 4001 is inactive. The number of configured port channels exceeds the config limit 2000.
Port-Channels1-2000,4002-999999 not configured as LAG
Port Channel Port-Channel2001:
Aggregate ID: [(8000,00-1c-73-04-36-d7,0001,0000,0000),(8000,00-1c-73-09-a0-f3,0001,0000,0000)]
Bundled Ports: Ethernet43 Ethernet44 Ethernet45 Ethernet46
Port Channel Port-Channel2002:
Aggregate ID: [(8000,00-1c-73-01-02-1e,0002,0000,0000),(8000,00-1c-73-04-36-d7,0002,0000,0000)]
Bundled Ports: Ethernet47 Ethernet48
Port Channel Port-Channel2003:
Aggregate ID: [(8000,00-1c-73-04-36-d7,0003,0000,0000),(8000,00-1c-73-0c-02-7d,0001,0000,0000)]
Bundled Ports: Ethernet3 Ethernet4
Port Channel Port-Channel2004:
Aggregate ID: [(0001,00-22-b0-57-23-be,0031,0000,0000),(8000,00-1c-73-04-36-d7,0004,0000,0000)]
Bundled Ports: Ethernet42
Port Channel Port-Channel2005:
Aggregate ID: [(0001,00-22-b0-5a-0c-51,0033,0000,0000),(8000,00-1c-73-04-36-d7,0005,0000,0000)]
Bundled Ports: Ethernet41
switch(config)# show lacp 1-$ counters
Port channel 4001 is inactive. The number of configured port channels exceeds the config limit 2000.
Port-Channels1-2000,4002-999999 not configured as LAG
switch(config)# show lacp 1-$ internal
Port channel 4001 is inactive. The number of configured port channels exceeds the config limit 2000.
Port-Channels1-2000,4002-999999 not configured as LAG
LACP System-identifier: 8000,00-1c-73-04-36-d7
State: A = Active, P = Passive; S=ShortTimeout, L=LongTimeout;
G = Aggregable, I = Individual; s+=InSync, s-=OutOfSync;
C = Collecting, X = state machine expired,
D = Distributing, d = default neighbor state
|Partner Actor
Port Status | Sys-id Port# State OperKey PortPriority
----------------------------------------------------------------------------
Port Channel Port-Channel2001:
Et43 Bundled | 8000,00-1c-73-09-a0-f3 43 ALGs+CD 0x0001 32768
Et44 Bundled | 8000,00-1c-73-09-a0-f3 44 ALGs+CD 0x0001 32768
Et45 Bundled | 8000,00-1c-73-09-a0-f3 45 ALGs+CD 0x0001 32768
Et46 Bundled | 8000,00-1c-73-09-a0-f3 46 ALGs+CD 0x0001 32768
switch(config)# show lacp 1-$ peer
Port channel 4001 is inactive. The number of configured port channels exceeds the config limit 2000.
Port-Channels1-2000,4002-999999 not configured as LAG
State: A = Active, P = Passive; S=ShortTimeout, L=LongTimeout;
G = Aggregable, I = Individual; s+=InSync, s-=OutOfSync;
C = Collecting, X = state machine expired,
D = Distributing, d = default neighbor state
| Partner
Port Status | Sys-id Port# State OperKey PortPri
----------------------------------------------------------------------------
Port Channel Port-Channel2001:
Et1 Bundled | 8000,00-1c-73-00-13-19 1 ALGs+CD 0x0001 32768
Et2 Bundled | 8000,00-1c-73-00-13-19 2 ALGs+CD 0x0001 32768
Port Channel Port-Channel2002:
Et23 Bundled | 8000,00-1c-73-04-36-d7 47 ALGs+CD 0x0002 32768
Et24 Bundled | 8000,00-1c-73-04-36-d7 48 ALGs+CD 0x0002 32768
Port Channel Port-Channel2004*:
Et3 Bundled | 8000,00-1c-73-0b-a8-0e 45 ALGs+CD 0x0001 32768
Et4 Bundled | 8000,00-1c-73-0b-a8-0e 46 ALGs+CD 0x0001 32768
Port Channel Port-Channel2005*:
Et19 Bundled | 8000,00-1c-73-0c-30-09 49 ALGs+CD 0x0005 32768
Et20 Bundled | 8000,00-1c-73-0c-30-09 50 ALGs+CD 0x0005 32768
Port Channel Port-Channel2006*:
Et6 Bundled | 8000,00-1c-73-01-07-b9 49 ALGs+CD 0x0001 32768
Port Channel Port-Channel2007*:
Et5 Bundled | 8000,00-1c-73-0f-6b-22 51 ALGs+CD 0x0001 32768
Port Channel Port-Channel2008*:
Et10 Bundled | 8000,00-1c-73-10-40-fa 51 ALGs+CD 0x0001 32768
* - Only local interfaces for MLAGs are displayed. Connect to the peer to
see the state for peer interfaces.
switch(config)# show lacp interface Ethernet1 [(internal|neighbor|peer)]
Interface Ethernet1 is a member of an inactive LACP port channel. The number of configured port channels exceeds the config limit 2000.
switch(config)# show port-channel 1-$
Port Channel Port-Channel2001:
No Active Ports
...
Port Channel Port-Channel4000:
No Active Ports
Port Channel Port-Channel4001:
Inactive, The number of configured port channels exceeds the config limit 2000.
switch(config)# show port-channel (dense|summary)
Flags
-------------------------- ----------------------------- -------------------------
a - LACP Active p - LACP Passive * - static fallback
F - Fallback enabled f - Fallback configured ^ - individual fallback
U - In Use D - Down
+ - In-Sync - - Out-of-Sync i - incompatible with agg
P - bundled in Po s - suspended G - Aggregable
I - Individual S - ShortTimeout w - wait for agg
E - Inactive. The number of configured port channels exceeds the config limit
Number of channels in use: ...
Number of aggregators: ...
Port-Channel Protocol Ports
------------------ -------------- -------------------
Po2001(U) LACP(a) Et47(PG+) Et48(PG+)
Po2002(U) LACP(a) Et39(PG+) Et40(PG+)
Po4001(E) Static Et7(P)
Limitations
- The number of configured port channels can exceed the configurable limit if two configuration sessions simultaneously create two different port channels. In this scenario, port channels that exceed the limit are inactive. This is uncommon and does not impact traffic in any way. If an inactive port channel exists and an active port channel is deleted, then the inactive port channel is activated.
- Only port channels with ID from 1 to 2000 are configured as MLAG port channels.
Configuring Port Channel Subinterfaces
When configuring subinterfaces on a port channel interface (the virtual interface associated with a port channel), the following restrictions apply:
- An interface that is a member of a port channel should not have subinterfaces configured on it.
- A subinterface cannot be made a member of a port channel.
Port channel subinterfaces are otherwise configured similarly to Ethernet subinterfaces. For additional information, see Subinterfaces.
Configuring LACP
Configuring the Channel-group Mode
The channel-group mode is configured when a channel group is created using the channel-group command. A channel group’s mode cannot be modified without deleting the entire channel group, but it can be modified without deleting the port channel interface associated with the channel group. The mode setting defines whether the port channel is static or dynamic, and whether a dynamic port channel is active or passive.
- These commands create a dynamic channel group and place it in LACP active mode.
switch(config)# interface ethernet 1-2 switch(config-if-Et1-2)# channel-group 10 mode active switch(config-if-Et1-2)# - These commands create a static channel group.
switch(config)# interface ethernet 4-5 switch(config-if-Et4-5)# channel-group 11 mode on switch(config-if-Et4-5)#
Configuring the System Priority
Each switch is assigned a globally unique system identifier by concatenating the system priority (16 bits) to the MAC address of one of its physical ports (48 bits). The system identifier is used by peer devices when forming an aggregation to verify that all links are from the same switch. The system identifier is also used when dynamically changing aggregation capabilities in response to LACP information; the system with the numerically lower system identifier is permitted to dynamically change advertised aggregation capabilities.
The lacp system-priority command configures the switch’s LACP system priority.
switch(config)# lacp system-priority 8192
switch(config)#
Configuring Port Priority
LACP port priority determines the port that is active in a LAG in fallback mode. Numerically lower values have higher priority. Port priority is supported on port channels that are enabled with LACP physical interfaces.
The lacp port-priority command sets the aggregating port priority for the configuration mode interface.
switch(config-if-Et1)# lacp port-priority 4096
switch(config-if-Et1)#
Configuring the LACP Packet Reception Rate
- normal: LACP packets are received at the following rates:
- 30 seconds for synchronized interfaces.
- One second for interfaces that are being synchronized.
- fast: LACP packets are received every second.
switch(config-if-Et4)# lacp timer fast
switch(config-if-Et4)#
Configuring LACP Fallback
Fallback mode (static or individual) is configured on a port channel interface with the port-channel lacp fallback command. The fallback timeout interval is configured with the port-channel lacp fallback timeout command. Fallback timeout settings persist in running-config without taking effect for interfaces that are not configured into fallback mode. The default fallback timeout period is 90 seconds.
- These commands enable LACP static fallback mode, then configure an LACP fallback timeout of 100 seconds on port channel interface 13. If LACP negotiation fails, only the member port with the lowest LACP priority will remain active until an LACP PDU is received by one of the member ports.
switch(config)# interface port-channel 13 switch(config-if-Po13)# port-channel lacp fallback static switch(config-if-Po13)# port-channel lacp fallback timeout 100 switch(config-if-Po13)# show active interface Port-Channel13 port-channel lacp fallback static port-channel lacp fallback timeout 100 switch(config-if-Po13)# - These commands enable LACP individual fallback mode, then configure an LACP fallback timeout of 50 seconds on port channel interface 17. If LACP negotiation fails, all member ports will act as individual switch ports, using port-specific configuration, until a LACP PDU is received by one of the member ports.
switch(config)# interface port-channel 17 switch(config-if-Po17)# port-channel lacp fallback individual switch(config-if-Po17)# port-channel lacp fallback timeout 50 switch(config-if-Po17)# show active interface Port-Channel17 port-channel lacp fallback individual port-channel lacp fallback timeout 50 switch(config-if-Po17)#
Configuring Minimum Links
The port-channel min-links command specifies the minimum number of interfaces that the configuration mode LAG requires to be active. If there are fewer ports than specified by this command, the port channel interface does not become active.
switch(config-if-Po5)# port-channel min-links 4
switch(config-if-Po5)#
Configuring Minimum Links Review Interval
- The min-links configured is greater than 1.
- LACP fallback is disabled.
- The number of interfaces configured in the port-channel is more than min-links.
- The number of active member interfaces in the port-channel is less than min-links.
- The default timer values are:
- min-links-review-timeout = min-links-timeout-base + f (configured min-links).
- min-links-timeout-base = 180 seconds.
- min-links-retry-timeout = 360 seconds.
Displaying Port Channel Information
Port channel information is accessed using some of the show commands listed under Interface Display Commands. Ensure that while using the show interfaces counters rates command to view the rate information of a port channel, rate values for the individual member ports are less inaccurate than rate values of the port channel.
Both the port channel rate and the individual port rates are calculated approximations; the rate value of a port channel might vary from the total of the rates for the member ports. The discrepancy is likely to be larger for port channels with fewer ports, and will be most obvious in single-port port channels.
Load Balancing Hash Algorithms
The switch balances packet load across multiple links in a port channel by calculating a hash value based on packet header fields. The hash value determines the active member link through which the packet is transmitted. This method, in addition to balancing the load in the LAG, ensures that all packets in a data stream follow the same network path.
In network topologies that include MLAGs or Multiple Paths with Equal Cost (ECMP), programming all switches to perform the same hash calculation increases the risk of hash polarization, which leads to uneven load distribution among LAG and MLAG member links. This uneven distribution is avoided by performing different hash calculations on each switch routing the paths.
The port-channel load-balance command specifies the seed for hashing algorithms that balance the load across ports comprising a port channel. Available seed values vary by switch platform.
switch(config)# port-channel load-balance fm6000 10
switch(config)#
Load Balance Hash Algorithms on 7048 and 7500 Series Switches
One command configures the load balance hash algorithm on 7048 and 7500 Series switches:
- port-channel load-balance petraA fields ip: controls the hash algorithm for IP packets by specifying the algorithm’s use of IP and MAC header fields. Fields that the command can specify include source and destination IP addresses, source and destination port fields (for TCP and UDP packets), and the entire MAC address header.
The hash algorithm for non-IP packets is not configurable and always includes the entire MAC header.
switch(config)# port-channel load-balance petraA fields ip mac-header
switch(config)#
Load Balance Hash Algorithms on 7500E Series Switches
One command configures the load balance hash algorithm on 7500E Series switches:
port-channel load-balance arad fields ip: controls the hash algorithm for IP packets by specifying the algorithm’s use of IP and MAC header fields. Fields that the command can specify include source and destination IP addresses, source and destination port fields (for TCP and UDP packets), and the entire MAC address header.
The hash algorithm for non-IP packets is not configurable and always includes the entire MAC header.
switch(config)# port-channel load-balance arad fields ip mac-header
switch(config)#
Dynamic and Symmetric LAG Hashing
Dynamic LAG hashing enables high link utilization and highly even distribution among LAG members by employing a randomized hashing algorithm. Symmetric LAG hashing allows the two flows of a bidirectional communication link, even when the two flows enter the switch on different ingress ports, to be hashed to the same member of a LAG on egress.
Dynamic and symmetric LAG hashing policies are enabled via named port-channel load-balancing profiles. LAG load-balancing policies can be provisioned on per line-card basis using these profiles. Load-balancing profiles can be used to provision all LAG load-balance attributes, including hash polynomials, hash seeds, and hash fields.
When no specific LAG hashing profile is assigned to a line card, then a global LAG hashing profile can be defined and applied to all the line cards with no LAG hashing defined on them.
Note, if no profile is selected as global profile then the default profile takes the precedence and set as a global profile. The default profile is reserved and if it is set as a global profile it cannot be deleted, if the profile is deleted then the following warning message is displayed.
- These commands configure a load balance profile for symmetric hashing.
switch(config)# load-balance policies switch(config-load-balance-policies)# load-balance arad profile switch(config-sand-load-balance-profile-symmetric-profile-1)# hash symmetric switch(config-sand-load-balance-profile-symmetric-profile-1)# show active load-balance policies load-balance arad profile symmetric-profile-1 hash symmetric - These commands configure a load balance profile for dynamic hashing.
switch(config)# load-balance policies switch(config-load-balance-policies)# load-balance arad profile switch(config-sand-load-balance-profile-dynamic-hash-profile-1)# distribution clock switch(config-sand-load-balance-profile-dynamic-hash-profile-1)# show active load-balance policies load-balance arad profile dynamic-hash-profile-1 distribution clock - This command assigns a named load-balancing profile to a linecard.
switch(config)# port-channel load-balance module 3-7 sand profile Linecard5 switch(config)# - This command unassigns a named load-balancing profile to a linecard.
switch(config)# no port-channel load-balance module 3-7 sand profile Linecard5 switch(config)# - This command configures a global profile on all line cards on which LAG hashing is not defined.
switch(config)# port-channel load-balance sand profile myGlobalProfile - These commands designates a default profile as a global profile, if no other profile is set as a global profile.
switch(config)# load-balance policies switch(config-load-balance-policies)# load-balance sand profile default - These commands configure a hash seed in a profile and assigns it as a global profile.
switch(config)# load-balance policies switch(config-load-balance-policies)# load-balance sand profile myGlobalProfile switch(config-sand-load-balance-profile-myGlobalProfile)# hash seed 20 switch(config)# port-channel load-balance sand profile myGlobalProfile - This command assigns a named load-balancing profile to a linecard.
switch(config)# port-channel load-balance module 3-7 sand profile Linecard5 switch(config)# - This command unassigns a named load-balancing profile to a linecard.
switch(config)# no port-channel load-balance module 3-7 sand profile Linecard5 switch(config)#
Load Balance Hash Algorithms on 7050 Series Switches
- port-channel load-balance trident fields ip controls the hash algorithm for IP packets by specifying the algorithm’s use of IP and MAC header fields. Fields that the command can specify include source and destination IP addresses, source and destination port fields (for TCP and UDP packets), and fields specified by the port-channel load-balance trident fields mac command.
- port-channel load-balance trident fields ipv6 controls the hash algorithm for IPv6 packets by specifying the algorithm’s use of IP and MAC header fields. Fields that the command can specify include source and destination IP addresses, source and destination port fields (for TCP and UDP packets), and fields specified by the port-channel load-balance trident fields mac command.
- port-channel load-balance trident fields mac controls the hash algorithm for non-IP packets b specifying the algorithm’s use of MAC header fields. Fields that the command can specify include the MAC source address, MAC destination address, and Ethernet type fields.
switch(config)# port-channel load-balance trident fields mac dst-mac eth-type
switch(config)#
Load Balance Hash Algorithms on 7150 Series Switches
Load balance profiles specify parameters used by hashing algorithms that distribute traffic across ports comprising a port channel or among component ECMP routes. The switch supports 16 load balance profiles, including the default profile. The default load balance profile is configured through port-channel load-balance fm6000 fields ip and port-channel load-balance fm6000 fields mac commands.
Load Balance Profiles
Load balance profiles are managed in load-balance-policies configuration mode. The load-balance-policies configuration mode provides commands that display the contents of all configured profiles and place the switch in load-balance-profile command. Load balance profiles are created by entering the load-balance-profile mode and edited while in that mode.
The load-balance policies command places the switch in load-balance-policies configuration mode. Load balance profiles specify the inputs used by the hashing algorithms that distribute traffic across ports comprising a port channel or among ECMP routes.
- This command places the switch in load-balance-policies configuration mode.
switch(config)# load-balance policies switch(config-load-balance-policies)# - This command displays the contents of the four load balance profiles configured on the switch.
switch(config-load-balance-policies)# show active load-balance policies load-balance fm6000 profile F-01 port-channel hash-seed 22 fields ip dscp distribution random port-channel ! load-balance fm6000 profile F-02 fields ip protocol dst-ip distribution random port-channel ! load-balance fm6000 profile F-03 fields ip protocol dst-ip fields mac dst-mac eth-type distribution random ecmp port-channel ! load-balance fm6000 profile F-04 switch(config-load-balance-policies)#
Creating a Load Balance Profile
The load-balance fm6000 profile command places the switch in load-balance-profile configuration mode to configure a specified load balance profile. The command specifies the name of the profile that subsequent commands modify. It creates a profile if the profile it references does not exist.
switch(config)# load-balance policies
switch(config-load-balance-policies)# load-balance fm6000 profile LB-5
switch(config-load-balance-profile-LB-5)# show active all
load-balance policies
load-balance fm6000 profile LB-5
port-channel hash-seed 0
fields mac dst-mac src-mac eth-type vlan-priority vlan-id
fields ip protocol dst-ip dst-port src-ip src-port dscp
no distribution symmetric-hash
no distribution random
switch(config-load-balance-profile-LB-5)#
Configuring a Load Balance Profile
- The fields ip command specifies the L3/L4 data fields used by the hash algorithm defined by the configuration mode load balance profile.
- The fields mac command specifies the L2 data fields used by the hash algorithm defined by the configuration mode load balance profile.
- The distribution symmetric-hash command enforces traffic symmetry on data distributed by the hash algorithm defined by the configuration mode load balance profile. Symmetric traffic is the flow of both directions of a data stream across the same physical link.
- The distribution random command specifies the random distribution of data packets handled by the hash algorithm defined by the configuration mode load balance profile.
- L2 header fields: MAC destination address, VLAN priority.
- L3/L4 header fields: Source IP address, protocol field.
- Symmetric hash distribution of IP and non-IP packets.
switch(config)# load-balance policies switch(config-load-balance-policies)# load-balance fm6000 profile LB-7 switch(config-load-balance-profile-LB-7)# fields ip src-ip protocol switch(config-load-balance-profile-LB-7)# fields mac dst-mac vlan-priority switch(config-load-balance-profile-LB-7)# distribution symmetric-hash mac-ip switch(config-load-balance-profile-LB-7)# show active load-balance policies load-balance fm6000 profile LB-7 fields mac dst-mac vlan-priority fields ip protocol src-ip distribution symmetric-hash mac-ip switch(config-load-balance-profile-LB-7)# exit switch(config-load-balance-policies)# exit switch(config)# exit
Assigning a Load Balance Profile to an Interface
The ingress load-balance profile command applies a specified load-balance profile to the configuration mode interface. Load balance profiles specify parameters used by hashing algorithms that distribute traffic across ports comprising a port channel or among ECMP routes. The switch supports 16 load balance profiles, including the default profile.
switch(config)# interface port-channel 100
switch(config-if-Po100)# ingress load-balance profile LB-1
switch(config-if-Po100)# show active
interface Port-Channel100
ingress load-balance profile LB-1
switch(config-if-Po100)#
Default Load Balance Profile
- port-channel load-balance fm6000 fields ip controls the hash algorithm for IP packets by specifying the algorithm’s use of IP and MAC header fields. Fields that the command can specify include source and destination IP addresses, source and destination port fields (for TCP and UDP packets).
- port-channel load-balance fm6000 fields mac controls the hash algorithm for non-IP packets by specifying the algorithm’s use of MAC header fields. Fields that the command can specify include include the MAC source address, MAC destination address, and Ethernet type, VLAN-ID, and VLAN-priority fields.
- These commands configure the load balance default profile for IP packets by using source and destination IP address fields, along with source and destination port fields for TCP, and UDP packets.
switch(config)# port-channel load-balance fm6000 fields ip ip-tcp-udp-header switch(config)# - This command applies the default load balance profile to interface port-channel 100.
switch(config)# interface port-channel 100 switch(config-if-Po100)# no ingress load-balance profile switch(config-if-Po100)# show active interface Port-Channel100 switch(config-if-Po100)#
Port Channel and LACP Configuration Commands
Global Port Channel and LACP Configuration Commands
Interface Configuration Commands – Ethernet Interface
Load Balance (Default) Commands
- port-channel load-balance
- port-channel load-balance arad fields ip
- port-channel load-balance fm6000 fields ip
- port-channel load-balance fm6000 fields mac
- port-channel load-balance module
- port-channel load-balance petraA fields ip
- port-channel load-balance sand profile (7500E/7500R)
- port-channel load-balance trident fields ip
- port-channel load-balance trident fields ipv6
- port-channel load-balance trident fields mac
Load Balance Policies Commands
EXEC Commands
channel-group
The channel-group command assigns the configuration mode Ethernet interfaces to a channel group, creates the group if it does not already exist, and sets the port-channel mode for the group. When adding interfaces to a previously created channel group, the port-channel mode for the newly added interfaces must match the mode for the existing group.
Channel groups are associated with a port channel interface immediately upon their creation. A command that creates a new channel group also creates a port channel with a matching ID. The port channel is configured in Port-channel Configuration Mode. Configuration changes to a port channel interface propagate to all Ethernet interfaces in the corresponding channel group. The interface port-channel command places the switch in the interface-port-channel configuration mode.
The no channel-group and default channel group commands remove the configuration-mode interface from the specified channel group.
Command Mode
Interface-Ethernet Configuration
Command Syntax
channel-group number mode group_mode
no channel-group
default channel-group
- number Specifies a channel group ID. Values range from 1 through 2000.
- group_mode Specifies the channel-group mode for the channel group. Values include:
- on Port channel is static and LACP is disabled on member interfaces. Port neither verifies nor negotiates port channel membership.
- active Port channel is dynamic and member interfaces are active LACP ports that transmit and receive LACP negotiation packets.
- passive Port channel is dynamic and member interfaces are passive LACP ports that respond to LACP negotiation packets but do not generate them.
- on Port channel is static and LACP is disabled on member interfaces. Port neither verifies nor negotiates port channel membership.
Guidelines: Port Channels
You can configure a port channel to contain many ports, but only a subset may be active at a time. All active ports in a port channel must be compatible. Compatibility includes many factors and is platform-specific. For example, compatibility may require identical operating parameters such as speed and Maximum Transmission Unit (MTU). Compatibility may only be possible between specific ports because of the internal organization of the switch.
Guidelines: MLAG Configurations
- When configuring multiple interfaces on the same static port channel:
- all interfaces must physically connect to the same neighboring switch.
- the neighboring switch must configure all interfaces into the same port channel.
The switches are misconfigured when these conditions are not met.
Disable the static port channel membership before moving any cables connected to these interfaces or changing a static port channel membership on the remote switch.
- These commands assign Ethernet interfaces 8 and 9 to channel group 10, and enable LACP in negotiating mode.
switch(config)# interface ethernet 8-9 switch(config-if-Et8-9)# channel-group 10 mode active switch(config-if-Et8-9)# show active interface Ethernet8 channel-group 10 mode active interface Ethernet9 channel-group 10 mode active switch(config-if-Et8-9)# - These commands assign Ethernet interfaces 12 and 13 to static channel group 11. LACP is disabled on these interfaces.
switch(config)# interface ethernet 12-13 switch(config-if-Et12-13)# channel-group 11 mode on switch(config-if-Et12-13)# show active interface Ethernet12 channel-group 11 mode on interface Ethernet13 channel-group 11 mode on switch(config-if-Et12-13)#
distribution random
The distribution random command specifies the random distribution of data packets handled by the hash algorithm defined by the configuration mode load balance profile. All data fields and hash seeds that are configured for the profile are used as seeds for the random number generator that defines the distribution of individual packets.
Command options allow for the random distribution of traffic across port channel links and ECMP routes. Random distribution can be enabled for either, both, or neither.
The no distribution random and default distribution random commands remove random distribution on the configuration mode load balance profile by deleting the corresponding distribution random command from the configuration.
Command Mode
Load-balance-profile Configuration
Command Syntax
distribution random BALANCE_TYPE
no distribution random
default distribution random
Parameters
- no parameter Random distribution is enabled for ECMP routes and port channel links.
- ecmp Random distribution is enabled for ECMP routes.
- port-channel Random distribution is enabled for port channel links.
- port-channel ecmp Random distribution is enabled for ECMP routes and port channel links.
- ecmp port-channel Random distribution is enabled for ECMP routes and port channel links.
Guidelines
The distribution random command takes precedence over the distribution symmetric-hash command when both methods are simultaneously enabled.
Related Commands
load-balance fm6000 profile places the switch in the load-balance-profile configuration mode.
switch(config)# load-balance policies
switch(config-load-balance-policies)# load-balance fm6000 profile LB-1
switch(config-load-balance-profile-LB-1)# distribution random ecmp port-channel
switch(config-load-balance-profile-LB-1)# show active
load-balance policies
load-balance fm6000 profile LB-1
distribution random ecmp port-channel
switch(config-load-balance-profile-LB-1)#distribution symmetric-hash
The distribution symmetric-hash command enforces traffic symmetry on data distributed by the hash algorithm defined by the configuration mode load balance profile. Symmetric traffic is the flow of both directions of a data stream across the same physical link.
- distribution symmetric-hash mac specifies that only non-IP traffic is hashed symmetrically. IP traffic is hashed normally without regard to symmetry.
- distribution symmetric-hash mac-ip specifies that all traffic is hashed symmetrically.
The no distribution symmetric-hash and default distribution symmetric-hash commands remove the specified hashing symmetry restriction on the configuration mode load balance profile by deleting the corresponding distribution symmetric-hash command from running-config.
Command Mode
Load-balance-profile
Command Syntax
distribution symmetric-hash FIELD_TYPE
no distribution symmetric-hash
default distribution symmetric-hash
Parameters
- mac Non-IP traffic is hashed symmetrically.
- mac-ip All traffic is hashed symmetrically.
Guidelines
The distribution random command takes precedence over the distribution symmetric-hash command when both methods are simultaneously enabled.
Related Commands
load-balance fm6000 profile places the switch in the load-balance-profile configuration mode.
switch(config)# load-balance policies
switch(config-load-balance-policies)# load-balance fm6000 profile LB-1
switch(config-load-balance-profile-LB-1)# distribution symmetric-hash mac-ip
switch(config-load-balance-profile-LB-1)# show active
load-balance policies
load-balance fm6000 profile LB-1
distribution symmetric-hash mac-ip
switch(config-load-balance-profile-LB-1)#fields ip
The fields ip command specifies the L3/L4 data fields used by the hash algorithm defined by the configuration mode load balance profile. When a load balance profile is assigned to a port channel or Ethernet interface, its associated hash algorithm determines the distribution of packets that ingress the interface. Profile algorithms can load balance packets across port channel links or ECMP routes.
The switch calculates a hash value by using the packet header fields to balance packets across links. The hash value determines the link through which the packet is transmitted. This method also ensures that all packets in a flow follow the same network path. Packet flow is modified by changing the inputs to the port channel hash algorithm.
In network topologies that include MLAGs, programming all switches to perform the same hash calculation increases the risk of hash polarization, which leads to uneven load distribution among LAG and MLAG member links in MLAG switches. This problem is avoided by performing different hash calculations between the MLAG switch, and a non-peer switch connected to it.
The no fields ip configures the algorithm not to use L3/L4 data fields. The default fields ip command restores the default data L3/L4 fields to the load balancing algorithm defined by the configuration mode profile by removing the corresponding fields ip or no fields ip command from running-config.
Command Mode
Load-balance-profile Configuration
Command Syntax
fields ip IP_FIELD
no fields ip
default fields ip
Parameters
- dscp Algorithm uses dscp field.
- dst-ip Algorithm uses destination IP address field.
- dst-port Algorithm uses destination TCP/UDP port field.
- protocol Algorithm uses protocol field.
- src-ip Algorithm uses source IP address field.
- src-port Algorithm uses source TCP/UDP port field.
Command may include from one to six fields, in any combination and listed in any order. The default setting is the selection of all fields.
Related Commands
load-balance fm6000 profile places the switch in the load-balance-profile configuration mode.
switch(config)# load-balance policies
switch(config-load-balance-policies)# load-balance fm6000 profile LB-1
switch(config-load-balance-profile-LB-1)# fields ip src-ip protocol
switch(config-load-balance-profile-LB-1)# show active
load-balance policies
load-balance fm6000 profile LB-1
fields ip protocol src-ip
switch(config-load-balance-profile-LB-1)#fields mac
The fields mac command specifies the L2 data fields used by the hash algorithm defined by the configuration mode load balance profile. When a load balance profile is assigned to a port channel or Ethernet interface, its associated hash algorithm determines the distribution of packets that ingress the interface. Profile algorithms can load balance packets across port channel links or ECMP routes.
The switch calculates a hash value using the packet header fields to balance packets across links. The hash value determines the link through which the packet is transmitted. This method also ensures that all packets in a flow follow the same network path. Packet flow is modified by changing the inputs to the port channel hash algorithm.
In network topologies that include MLAGs, programming all switches to perform the same hash calculation increases the risk of hash polarization, which leads to uneven load distribution among LAG and MLAG member links in MLAG switches. This problem is avoided by performing different hash calculations between the MLAG switch, and a non-peer switch connected to it.
The no fields mac configures the algorithm not to use L2 data fields. The default fields mac command restores the default data L2 fields to the load balancing algorithm defined by the configuration mode profile by removing the corresponding fields mac or no fields mac command from running-config.
Command Mode
Load-balance-profile Configuration
Command Syntax
fields mac MAC_FIELD
no fields mac
default fields mac
Parameters
- dst-mac Algorithm uses the MAC destination field.
- eth-type Algorithm uses the Ethernet port type field.
- src-mac Algorithm uses MAC source field.
- vlan-id Algorithm uses VLAN ID field.
- vlan-priority Algorithm uses VLAN priority field.
Related Commands
The load-balance fm6000 profile command places the switch in to the load-balance-profile configuration mode.
switch(config)# load-balance policies
switch(config-load-balance-policies)# load-balance fm6000 profile LB-1
switch(config-load-balance-profile-LB-1)# fields mac dst-mac vlan-priority
switch(config-load-balance-profile-LB-1)# show active
load-balance policies
load-balance fm6000 profile LB-1
fields mac dst-mac vlan-priority
switch(config-load-balance-profile-LB-1)#hash-seed
The hash-seed command specifies the seed used by the hash algorithm defined by the configuration mode load balance profile. Profile algorithms can load balance packets across port channel links or ECMP routes.
The no hash-seed and default hash-seed commands restore the default hash seed value of 0 to the load balancing algorithm defined by the configuration mode profile by removing the corresponding hash-seed command from running-config.
Command Mode
Load-balance-profile Configuration
Command Syntax
hash-seed number
no hash-seed number
default hash-seed number
Parameters
number Specifies the value of the hash seed. Value ranges from 0 to 39.
switch(config)# load-balance policies
switch(config-load-balance-policies)# load-balance sand profile myGlobalProfile
switch(config-sand-load-balance-profile-myGlobalProfile)# hash-seed 20
switch(config)# port-channel load-balance sand profile myGlobalProfileingress load-balance profile
The ingress load-balance profile command applies the specified load-balance profile to the configuration mode interface. Load balance profiles specify parameters used by hashing algorithms that distribute traffic across ports comprising a port channel or among ECMP routes. The switch supports 16 load balance profiles, including the default profile.
Load balance profiles can be assigned to Ethernet and port channel interfaces. Profiles define the distribution method of traffic that ingresses the interface among the ports comprising a port channel or routes comprising an ECMP.
The default load balance profile is configured through port-channel load-balance fm6000 fields ip and port-channel load-balance fm6000 fields mac commands.
The no ingress load-balance profile and default ingress load-balance profile commands restore the default load balance profile for the configuration mode interface by removing the corresponding ingress load-balance profile command from running-config.
Command Mode
Interface-Ethernet Configuration
Interface-Port-Channel Configuration
Command Syntax
ingress load-balance profile profile_name
no ingress load-balance profile
default ingress load-balance profile
Parameters
profile_name Name of profile assigned to interface.
switch(config)# interface port-channel 100
switch(config-if-Po100)# show active
interface Port-Channel100
switch(config-if-Po100)# ingress load-balance profile LB-1
switch(config-if-Po100)#
interface Port-Channel100
ingress load-balance profile LB-1
switch(config-if-Po100)#interface port-channel
The interface port-channel command places the switch in port-channel interface configuration mode for modifying parameters of specified link aggregation (LAG) interfaces. When entering configuration mode to modify existing port channel interfaces, the command can specify multiple interfaces.
The command creates a port channel interface if the specified interface does not exist prior to issuing the command. When creating an interface, the command can only specify a single interface.
The no interface port-channel and default interface port-channel commands delete the specified LAG interfaces from running-config.
Command Mode
Global Configuration
Command Syntax
interface port-channel p_range
no interface port-channel p_range
default interface port-channel p_range
Parameter
p_range Port channel interfaces (number, range, or comma-delimited list of numbers and ranges).
Port channel numbers range from 1 to 2000.
Guidelines
When configuring a port channel, you do not need to issue the interface port-channel command before assigning a port to the port channel (see the channel-groupcommand). The port channel number is implicitly created when a port is added to the specified port channel with the channel-group number command.
To display ports that are members of a port channel, enter show port-channel. To view information about hardware limitations for a port channel, enter show port-channel limits.
All active ports in a port channel must be compatible. Compatibility comprises many factors and is specific to a given platform. For example, compatibility may require identical operating parameters such as speed and/or Maximum Transmission Unit (MTU). Compatibility may only be possible between specific ports because of internal organization of the switch.
You can configure a port channel with a set of ports such that more than one subset of the member ports are mutually compatible. Port channels in EOS are designed to activate the compatible subset of ports with the largest aggregate capacity. A subset with two 40 Gbps ports (aggregate capacity 80 Gbps) has preference to a subset with five active 10 Gbps ports (aggregate capacity 50 Gbps).
switch(config)# interface port-channel 3
switch(config-if-Po3)#lacp port-priority
The lacp port-priority command sets the aggregating port priority for the configuration mode interface. Priority is supported on port channels with LACP-enabled physical interfaces. LACP port priority determines the port that is active in a LAG in fallback mode. Numerically lower values have higher priority.
Each port in an aggregation is assigned a 32-bit port identifier by prepending the port priority (16 bits) to the port number (16 bits). Port priority determines the ports that are placed in standby mode when hardware limitations prevent a single aggregation of all compatible ports.
Priority numbers range from 0 to 65535. The default is 32768. Interfaces with higher priority numbers are placed in standby mode before interfaces with lower priority numbers.
The no lacp port-priority and default lacp port-priority commands restore the default port-priority to the configuration mode interface by removing the corresponding lacp port-priority command from running-config.
Command Mode
Interface-Ethernet Configuration
Command Syntax
lacp port-priority priority_value
no lacp port-priority
default lacp port-priority
Parameters
priority_level Port priority. Values range from 0 to 65535. Default is 32768
switch(config)# interface ethernet 8
switch(config-if-Et8)# lacp port-priority 4096
switch(config-if-Et8)# show active
interface Ethernet8
lacp port-priority 4096
switch(config-if-Et8)#lacp system-priority
The lacp system-priority command configures the switch’s LACP system priority. Values range between 0 and 65535. Default value is 32768.
Each switch is assigned a globally unique 64-bit system identifier by prepending the system priority (16 bits) to the MAC address of one of its physical ports (48 bits). Peer devices use the system identifier when forming an aggregation to verify that all links are from the same switch. The system identifier is also used when dynamically changing aggregation capabilities resulting from LACP data; the system with the numerically lower system identifier can dynamically change advertised aggregation parameters.
The no lacp system-priority and default lacp system-priority commands restore the default system priority by removing the lacp system-priority command from running-config.
Command Mode
Global Configuration
Command Syntax
lacp system-priority priority_value
no lacp system-priority
default lacp system-priority
Parameters
priority_value System priority number. Values range from 0 to 65535. Default is 32768.
switch(config)# lacp system-priority 8192
switch(config)#lacp timer
- normal: 30 seconds with synchronized interfaces; one second while interfaces are synchronizing.
- fast: one second.
This command is supported on LACP-enabled interfaces. The default value is normal.
The no lacp timer and default lacp timer commands restore the default value of normal on the configuration mode interface by deleting the corresponding lacp timer command from running-config.
Command Mode
Interface-Ethernet Configuration
Command Syntax
lacp timer RATE_LEVEL
no lacp timer
default lacp timer
Parameters
- fast One second.
- normal 30 seconds for synchronized interfaces; 1 second while interfaces synchronize.
switch(config-if-Et4)# lacp timer fast
switch(config-if-Et4)#load-balance fm6000 profile
The load-balance fm6000 profile command places the switch in load-balance-profile configuration mode to configure a specified load balance profile. The command specifies the name of the profile that subsequent commands modify. It creates a profile if the profile it references does not exist.
Load balance profiles specify parameters used by hashing algorithms that distribute traffic across ports comprising a port channel or among component ECMP routes. The switch supports 16 load balance profiles, including the default profile. The default load balance profile is configured through port-channel load-balance fm6000 fields ip and port-channel load-balance fm6000 fields mac commands.
The load balance profile name is referenced when it is applied to an interface. The default profile is not associated with a name and is applied to an interface in the absence of a named profile assignment.
The no load-balance fm6000 profile and default load-balance fm6000 profile commands delete the specified load balance profile from running-config. Profiles that are assigned to an interface cannot be deleted. Attempts to delete an assigned profile generate a profile in use error messages.
The load-balance fm6000 profile command is accessible from load-balance-policies configuration mode. The load-balance-profile configuration mode is not a group change mode; running-config is changed immediately upon entering commands. Exiting the load-balance-policies configuration mode does not affect the configuration. The exit command returns the switch to the load-balance-policies configuration mode.
Command Mode
Load-balance-policies Configuration
Command Syntax
load-balance fm6000 profile profile_name
no load-balance fm6000 profile profile_name
default load-balance fm6000 profile profile_name
Parameters
profile_name Name of the load-balance profile.
- fields ip
- fields mac
- distribution random
- distribution symmetric-hash
- port-channel hash-seed
- show active displays the contents of the configuration mode profile.
- The load-balance policies command places the switch in to theload-balance-policies configuration mode.
- The ingress load-balance profile command applies a load-balance profile to an Ethernet or port channel interface.
- The show load-balance profile command displays the contents of load balance profiles.
switch(config)# load-balance policies
switch(config-load-balance-policies)# load-balance fm6000 profile LB-1
switch(config-load-balance-profile-LB-1)# show active all
load-balance policies
load-balance fm6000 profile LB-1
port-channel hash-seed 0
fields mac dst-mac src-mac eth-type vlan-priority vlan-id
fields ip protocol dst-ip dst-port src-ip src-port dscp
no distribution symmetric-hash
no distribution random
switch(config-load-balance-profile-LB-1)#load-balance policies
The load-balance policies command places the switch in load-balance-policies configuration mode. Load-balance-policies configuration mode provides commands for managing load-balance profiles. Load balance profiles specify the inputs used by the hashing algorithms that distribute traffic across ports comprising a port channel or among ECMP routes.
The no load-balance policies and default load-balance policies commands delete all load balance profiles from running-config. The command generates an error message when at least one profile is assigned to an interface.
Load-balance-policies configuration mode is not a group change mode; running-config is changed immediately upon entering commands. Exiting the load-balance-policies configuration mode does not affect running-config. The exit command returns the switch to global configuration mode.
Command Mode
Global Configuration
Command Syntax
load-balance policies
no load-balance policies
default load-balance policies
- load-balance fm6000 profile places the switch in load-balance-profile configuration mode.
- show active displays contents of all load balance profiles.
- The ingress load-balance profile command applies a load-balance profile to an Ethernet or port channel interface.
- The show load-balance profile command displays the contents of load balance profiles.
- This command places the switch in the load-balance-policies configuration mode.
switch(config)# load-balance policies switch(config-load-balance-policies)# - This command displays the contents of the three configured load balance profiles.
switch(config-load-balance-policies)# show active load-balance policies load-balance fm6000 profile F-01 port-channel hash-seed 22 fields ip dscp distribution random port-channel ! load-balance fm6000 profile F-02 fields ip protocol dst-ip fields mac dst-mac eth-type distribution random ecmp port-channel ! load-balance fm6000 profile F-03 switch(config-load-balance-policies)#
load-balance sand profile (7500E/7500R)
The load-balance sand profile command configures a load-balance profile on a sand module switch. A default profile is designated as a global profile when no other profile is set as global profile. Note, a warning message is displayed when a profile is entered or deleted.
! profile default is a reserved profile and cannot be deleted
Command Mode
Global Configuration
Command Syntax
load-balance sand profile profile_name
no load-balance sand profile profile_name
Parameter
profile_name Name of the profile assigned to the selected module.
- These commands designate a default profile as a global profile on sand module platform switch. Note, a warning message is displayed when a profile is entered or deleted.
switch(config)# load-balance policies switch(config-load-balance-policies)# load-balance sand profile default ! profile default is a reserved profile ! profile default is the current global profile - When no form of the command is executed it displays the following warning message.
switch(config)# load-balance policies switch(config-load-balance-policies)# no load-balance sand profile default ! profile default is a reserved profile and cannot be deleted
monitor session destination
The monitor session destination configures Port Channel interfaces as a mirroring destination for both ingress and egress traffic.
The no | default versions of the command removes the configuration from the running-configuration.
Command Mode
Global Configuration
Command Syntax
monitor session session_name destination Port-Channel interface_number
Parameters
- session session_name - Configure a name for the session.
- destination - Specify the mirroring for Port Channel traffic as the destination.
- Port-Channel interface_number - Specify the Port Channel to be the destination.
Example
Use the following command to configure Port Channel 1 as a mirroring destination:
switch(config)#monitor session 1 destination Port-Channel 1monitor session source
The monitor session source configures Port Channel interfaces as a mirroring source for both ingress and egress traffic.
The no | default versions of the command removes the configuration from the running-configuration.
Command Mode
Global Configuration
Command Syntax
monitor session session_name source interface_number
Parameters
- session session_name - Configure a name for the session.
- source - Specify the mirroring for Port Channel traffic as the source.
- interface_number - Specify the Ethernet interface to be the source of the ingress and egress traffic.
Example
Use the following command to configure a session, testmember with the Ethernet interface Et3/3/1:
switch(config)#monitor session testmember source Et3/3/1port-channel hash-seed
The port-channel hash-seed command specifies the seed used by the hash algorithm defined by the configuration mode load balance profile when distributing the load across ports comprising a port channel. When a load balance profile is assigned to a port channel or Ethernet interface, its associated hash algorithm determines the distribution of packets that ingress the interface. Profile algorithms can load balance packets across port channel links or ECMP routes.
The hash seed that the algorithm uses to select port channel links or ECMP routes is configured by the ip load-sharing command.
The no port-channel hash-seed and default port-channel hash-seed commands restore the default hash seed value of 0 to the load balancing algorithm defined by the configuration mode profile by removing the corresponding port-channel hash-seed command from running-config.
Command Mode
Load-balance-profile Configuration
Command Syntax
port-channel hash-seed number
no port-channel hash-seed
default port-channel hash-seed
Parameters
number The hash seed. Value ranges from 0 to 39.
Related Commands
The load-balance fm6000 profile command places the switch in to the load-balance-profile configuration mode.
switch(config)# load-balance policies
switch(config-load-balance-policies)# load-balance fm6000 profile LB-1
switch(config-load-balance-profile-LB-1)# port-channel hash-seed 22
switch(config-load-balance-profile-LB-1)# show active
load-balance policies
load-balance fm6000 profile LB-1
port-channel hash-seed 22
switch(config-load-balance-profile-LB-1)#port-channel lacp fallback
The port-channel lacp fallback command enables the LACP fallback mode on the interface.
LACP fallback is unconfigured and disabled by default. An LACP interface without fallback enabled does not form a LAG until it receives PDUs from its peer.
- static mode The port channel member with the lowest LACP port priority is active and maintains contact with the peer (sending and receiving data) while other port channel members remain in standby mode until a LACP PDU is received. All members continue to send (and can receive) LACP PDUs.
- individual mode All port channel members act as individual ports, reverting to their port-specific configuration while the channel is in fallback mode, and continue to send and receive data. All members continue to send LACP PDUs until a LACP PDU is received by one of the member ports.
The no port-channel lacp fallback and default port-channel lacp fallback commands disable LACP fallback mode on the configuration mode interface by removing the corresponding port-channel lacp fallback command from running-config.
Command Mode
Interface-Port-Channel Configuration
Command Syntax
port-channel lacp fallback [MODE]
no port-channel lacp fallback
default port-channel lacp fallback
Parameters
- no parameter Enables static LACP fallback mode.
- static Enables static LACP fallback mode.
- individual Enables individual LACP fallback mode.
- The port-channel lacp fallback timeout command configures the fallback timeout period for a port channel interface. The default LACP fallback timeout period is 90 seconds.
- The lacp port-priority command configures the port priority for an individual interface.
- These commands enable LACP static fallback mode, then configure an LACP fallback timeout of 100 seconds on interface port-channel 13. If LACP negotiation fails, only the member port with the lowest LACP priority will remain active until an LACP PDU is received by one of the member ports.
switch(config)# interface port-channel 13 switch(config-if-Po13)# port-channel lacp fallback static switch(config-if-Po13)# port-channel lacp fallback timeout 100 switch(config-if-Po13)# show active interface Port-Channel13 port-channel lacp fallback static port-channel lacp fallback timeout 100 switch(config-if-Po13)# - These commands enable LACP individual fallback mode, then configure an LACP fallback timeout of 50 seconds on interface port-channel 17. If LACP negotiation fails, all member ports will act as individual switch ports, using port-specific configuration, until a LACP PDU is received by one of the member ports.
switch(config)# interface port-channel 17 switch(config-if-Po17)# port-channel lacp fallback individual switch(config-if-Po17)# port-channel lacp fallback timeout 50 switch(config-if-Po17)# show active interface Port-Channel17 port-channel lacp fallback individual port-channel lacp fallback timeout 50 switch(config-if-Po17)#
port-channel lacp fallback timeout
The port-channel lacp fallback timeout command specifies the fallback timeout period for the configuration mode interface.
Fallback timeout settings persist in running-config without taking effect for interfaces that are not configured into fallback mode. The default fallback timeout period is 90 seconds.
The no port-channel lacp fallback timeout and default port-channel lacp fallback timeout commands restore the default fallback timeout of 90 seconds for the configuration mode interface by removing the corresponding port-channel lacp fallback timeout command from running-config.
Command Mode
Interface-Port-Channel Configuration
Command Syntax
port-channel lacp fallback timeout period
no port-channel lacp fallback timeout
default port-channel lacp fallback timeout
Parameters
period Maximum interval between receipt of LACP PDU packets (seconds). Value ranges from 1 to 300 seconds. Default value is 90.
Related Commands
The port-channel lacp fallback command configures fallback mode for a port channel interface.
Guidelines
The fallback timeout period should not be shorter than the LACP reception interval (lacp timer). The default LACP reception interval is 30 seconds.
switch(config)# interface port-channel 13
switch(config-if-Po13)# port-channel lacp fallback
switch(config-if-Po13)# port-channel lacp fallback timeout 100
switch(config-if-Po13)# show active
interface Port-Channel13
port-channel lacp fallback
port-channel lacp fallback timeout 100
switch(config-if-Po13)#port-channel load-balance
The port-channel load-balance command specifies the seed in the hashing algorithm that balances the load across ports comprising a port channel. Available seed values vary by switch platform.
The no port-channel load-balance and default port-channel load-balance commands remove the port-channel load-balance command from running-config, restoring the default hash seed value of 0.
Command Mode
Global Configuration
Command Syntax
port-channel load-balance platform { hash_seed | fields ip fields | hash hash_function }
no port-channel load-balance platform [ hash_seed ]
default port-channel load-balance platform [ hash_seed ]
Parameters
- platform ASIC switching device. Value depends on the switch model.
- hash_seed The numerical seed for the hash function. Value range varies by switch platform:
- arad 0 to 65535.
- fm6000 0 to 39.
- petraA Uses field inputs only.
- trident 0 to 47.
For trident platform switches, algorithms using hash seeds between 0 and 15 typically result in more effective distribution of data streams across the port channels.
- fields Which fields will be used as inputs to the port channel hash.
- gre Configure which GRE fields are inputs to the hash.
- ip Configure which fields are inputs to the hash for IPv4 packets.
- ipv6 Configure which fields are inputs to the hash for IPv6 packets.
- mac Configure which MAC fields are inputs to the hash.
- mac-in-mac Configure which MAC-in-MAC fields are inputs to the hash.
- mpls Configure which MPLS fields are inputs to the hash.
- destination-ip Use the Layer 3 IP destination address in the hash.
- destination-port Use the Layer 4 TCP/UDP destination port in the hash.
- dst-ip Use the destination IP address in the hash.
- dst-mac Use the destination Payload MAC in the hash (or the destination MAC address in the MAC hash).
- eth-type Use the Ethernet type in the MAC hash.
- ip-in-ip Use the outer IP header in the hash for IPv4 over IPv4 GRE tunnel.
- ip-in-ipv6 Use the outer IP header in the hash for IPv4 over IPv6 GRE tunnel.
- ipv6-in-ip Use the outer IP header in the hash for IPv6 over IPv4 GRE tunnel.
- ipv6-in-ipv6 Use the outer IP header in the hash for IPv6 over IPv6 GRE tunnel.
- ip-tcp-udp-header Use the Layer 3 and Layer 4 hashes.
- isid Use the MAC-in-MAC ISID in the hash.
- label Use the MPLS label in the hash.
- mac-header Use the MAC hash.
- outer-mac Use the outer MAC of source and destination in the hash.
- source-ip Use the Layer 3 IP source address in the hash.
- src-ip Use the source IP address in the hash.
- source-port Use l\Layer 4 TCP/UDP source port in the hash.
- src-mac Use the source payload MAC in the hash (or the source MAC address in the MAC hash).
- hash_function Specifies the hash polynomial function. Values range from 0-2.
switch(config)# port-channel load-balance fm6000 10
switch(config)#port-channel load-balance arad fields ip
The port-channel load-balance arad fields ip command specifies the data fields that the port channel load balance hash algorithm uses for distributing IP packets on Arad platform switches. The hashing algorithm fields used for IP packets differ from the fields used for non-IP packets.
The switch calculates a hash value using the packet header fields to load balance packets across links in a port channel. The hash value determines the link through which the packet is transmitted. This method also ensures that all packets in a flow follow the same network path. Packet flow is modified by changing the inputs to the port channel hash algorithm.
In network topologies that include MLAGs, programming all switches to perform the same hash calculation increases the risk of hash polarization, which leads to uneven load distribution among LAG and MLAG member links in MLAG switches. This problem is avoided by performing different hash calculations between the MLAG switch, and a non-peer switch connected to it.
The no port-channel load-balance arad fields ip and default port-channel load-balance arad fields ip commands restore the default data fields for the IP packet load balancing algorithm by removing the port-channel load-balance arad A fields ip command from running-config.
Command Mode
Global Configuration
Command Syntax
port-channel load-balance arad fields ip IP_FIELD_NAME
no port-channel load-balance arad fields ip
default port-channel load-balance arad fields ip
Parameters
- ip-tcp-udp-header Algorithm uses source and destination IP address fields. Source and destination port fields are included for TCP and UDP packets.
- mac-header Algorithm uses entire MAC header.
A command can only specify one option. The default setting is ip-tcp-udp-header.
- mac-header Algorithm uses entire MAC header.
Guidelines
The port channel hash algorithm for non-IP packets is not configurable and always includes the entire MAC header.
Related Command
The port-channel load-balance command configures the hash seed for the algorithm.
switch(config)# port-channel load-balance fm6000 fields ip ip-tcp-udp-header
switch(config)#port-channel load-balance fm6000 fields ip
The port-channel load-balance fm6000 fields ip command specifies the data fields that the port channel load balance hash algorithm uses for distributing IP packets on FM6000 platform switches. The hashing algorithm fields used for IP packets differ from the fields used for non-IP packets.
The switch calculates a hash value using the packet header fields to load balance packets across links in a port channel. The hash value determines the link through which the packet is transmitted. This method also ensures that all packets in a flow follow the same network path. Packet flow is modified by changing the inputs to the port channel hash algorithm.
In network topologies that include MLAGs, programming all switches to perform the same hash calculation increases the risk of hash polarization, which leads to uneven load distribution among LAG and MLAG member links in MLAG switches. This problem is avoided by performing different hash calculations between the MLAG switch, and a non-peer switch connected to it.
The no port-channel load-balance fm6000 fields ip and default port-channel load-balance fm6000 fields ip commands restore the default data fields for the IP packet load balancing algorithm by removing the port-channel load-balance fm6000 fields ip command from running-config.
Command Mode
Global Configuration
Command Syntax
port-channel load-balance fm6000 fields ip IP_FIELD_NAME
no port-channel load-balance fm6000 fields ip
default port-channel load-balance fm6000 fields ip
Parameters
- ip-tcp-udp-header Algorithm uses source and destination IP address fields. Source and destination port fields are included for TCP and UDP packets.
A command can only specify one option. The default setting is ip-tcp-udp-header.
- The port-channel load-balance command configures the hash seed for the algorithm.
- The port-channel load-balance fm6000 fields mac command controls the hash algorithm for non-IP packets.
switch(config)# port-channel load-balance fm6000 fields ip ip-tcp-udp-header
switch(config)#port-channel load-balance fm6000 fields mac
The port-channel load-balance fm6000 fields mac command specifies data fields that configure the port channel load balance hash algorithm for non-IP packets on FM6000 platform switches. The hashing algorithm fields used for balancing non-IP packets differ from the fields used for IP packets.
The switch calculates a hash value using the packet header fields to load balance packets across links in a port channel. The hash value determines the link through which the packet is transmitted. This method also ensures that all packets in a flow follow the same network path. Packet flow is modified by changing the inputs to the port channel hash algorithm.
In network topologies that include MLAGs, programming all switches to perform the same hash calculation increases the risk of hash polarization, which leads to uneven load distribution among LAG and MLAG member links in MLAG switches. This problem is avoided by performing different hash calculations between the MLAG switch, and a non-peer switch connected to it.
The no port-channel load-balance fm6000 fields mac and default port-channel load-balance fm6000 fields mac commands restore the default data fields for the non-IP packet load balancing algorithm by removing the port-channel load-balance fm6000 fields mac command from running-config.
Command Mode
Global Configuration
Command Syntax
port-channel load-balance fm6000 fields mac MAC_FIELD_NAME
no port-channel load-balance fm6000 fields mac
default port-channel load-balance fm6000 fields mac
Parameters
- dst-mac MAC destination field.
- eth-type EtherType field.
- src-mac MAC source field.
- vlan-id VLAN ID field.
- vlan-priority VLAN priority field.
Command may include from one to five fields, in any combination and listed in any order. The default setting is the selection of all fields.
- The port-channel load-balance command configures the hash seed for the algorithm.
- The port-channel load-balance fm6000 fields ip command controls the hash algorithm for IP packets.
switch(config)# port-channel load-balance fm6000 fields mac dst-mac eth-type
switch(config)#port-channel load-balance module
The port-channel load-balance module command assigns a named load-balancing profile to a linecard.
The no port-channel load-balance module and default port-channel load-balance module commands unassigns the load balancing module, or restores the default data fields for the load balancing module.
Command Mode
Global Configuration
Command Syntax
port-channel load-balance module LINECARD_RANGE sand profile PROFILE_NAME
no port-channel load-balance module LINECARD_RANGE sand profile PROFILE_NAME
default port-channel load-balance module LINECARD_RANGE sand profile PROFILE_NAME
- LINECARD_RANGE Linecard number range includes:
- 3-10 Linecard number range.
- 3-10 Linecard number range.
- PROFILE_NAME Load-balance profile name.
- This command assigns a named load-balancing profile to a linecard.
switch(config)# port-channel load-balance module 3-7 sand profile Linecard5 switch(config)# - This command unassigns a named load-balancing profile to a linecard.
switch(config)# no port-channel load-balance module 3-7 sand profile Linecard5 switch(config)#
port-channel load-balance petraA fields ip
The port-channel load-balance petraA fields ip command specifies the data fields that the port channel load balance hash algorithm uses for distributing IP packets on Petra platform switches. The hashing algorithm fields used for IP packets differ from the fields used for non-IP packets.
The switch calculates a hash value using the packet header fields to load balance packets across links in a port channel. The hash value determines the link through which the packet is transmitted. This method also ensures that all packets in a flow follow the same network path. Packet flow is modified by changing the inputs to the port channel hash algorithm.
In network topologies that include MLAGs, programming all switches to perform the same hash calculation increases the risk of hash polarization, which leads to uneven load distribution among LAG and MLAG member links in MLAG switches. This problem is avoided by performing different hash calculations between the MLAG switch, and a non-peer switch connected to it.
The no port-channel load-balance petraA fields ip and default port-channel load-balance petraA fields ip commands restore the default data fields for the IP packet load balancing algorithm by removing the port-channel load-balance petraA fields ip command from running-config.
Command Mode
Global Configuration
Command Syntax
port-channel load-balance petraA fields ip IP_FIELD_NAME
no port-channel load-balance petraA fields ip
default port-channel load-balance petraA fields ip
Parameters
- ip-tcp-udp-header Algorithm uses source and destination IP address fields. Source and destination port fields are included for TCP and UDP packets.
- mac-header Algorithm uses entire MAC header.
A command can only specify one option. The default setting is ip-tcp-udp-header.
Guidelines
The port channel hash algorithm for non-IP packets is not configurable and always includes the entire MAC header.
Related Command
The port-channel load-balance command configures the hash seed for the algorithm.
switch(config)# port-channel load-balance fm6000 fields ip ip-tcp-udp-header
switch(config)#port-channel load-balance sand profile (7500E/7500R)
The port-channel load-balance sand profile command configures a global LAG hashing profile on the port channel interface. A default profile is set as a global profile when no other profile is set as global.
The no port-channel load-balance sand profile command removes the active profile from the port-channel load-balance command from running-config, restoring the default profile.
Command Mode
Global Configuration
Command Syntax
port-channel load-balance sand profile profile_name
no port-channel load-balance sand profile profile_name
Parameter
profile_name Name of the profile assigned to the selected module.
switch(config)# port-channel load-balance sand profile myGlobalProfile
switch(config)#port-channel load-balance trident fields ip
The port-channel load-balance trident fields ip command specifies the data fields that the port channel load balance hash algorithm uses for distributing IP packets on Trident platform switches. The hashing algorithm fields used for IP packets differ from the fields used for non-IP packets.
The switch calculates a hash value using the packet header fields to load balance packets across links in a port channel. The hash value determines the link through which the packet is transmitted. This method also ensures that all packets in a flow follow the same network path. Packet flow is modified by changing the inputs to the port channel hash algorithm.
In network topologies that include MLAGs, programming all switches to perform the same hash calculation increases the risk of hash polarization, which leads to uneven load distribution among LAG and MLAG member links in MLAG switches. This problem is avoided by performing different hash calculations between the MLAG switch, and a non-peer switch connected to it.
The no port-channel load-balance trident fields ip and default port-channel load-balance trident fields ip commands restore the default data fields for the IP packet load balancing algorithm by removing the port-channel load-balance trident fields ip command from running-config.
Command Mode
Global Configuration
Command Syntax
port-channel load-balance trident fields ip IP_FIELD_NAME
no port-channel load-balance trident fields ip
default port-channel load-balance trident fields ip
default port-channel load-balance trident fields ip ingress-interface disabled
- IP_FIELD_NAME Specifies fields the hashing algorithm uses for Layer 3 routing. Command may include from one to four of the following four options, in any combination and listed in any order.
- destination-ip Algorithm uses destination IP address field.
- source-ip Algorithm uses source IP address field.
- destination-port Agorithm uses destination TCP/UDP port field.
- source-port Algorithm uses source TCP/UDP port field.
- ip-tcp-udp-header Algorithm uses source and destination IP address fields. Source and destination port fields are included for TCP and UDP packets.
Note: This option cannot be used in combination with any other option.
- ip-tcp-udp-header Algorithm uses source and destination IP address fields. Source and destination port fields are included for TCP and UDP packets.
- mac-header Algorithm uses fields specified by port-channel load-balance trident fields mac.
Note: This option cannot be used in combination with any other option.
- ingress-interface Disable from LAG hashing.
Default setting is ip-tcp-udp-header.
- The port-channel load-balance command configures the hash seed for the algorithm.
- The port-channel load-balance trident fields ipv6 command controls the hash algorithm for IPv6 packets.
- The port-channel load-balance trident fields mac command controls the hash algorithm for non-IP/IPv6 packets.
- These commands configure the switch’s port channel load balance for IP packets by using the IPv6 destination field in the hashing algorithm.
switch(config)# port-channel load-balance trident fields ip destination-ip switch(config)# - This command disables the ingress interface for IPv4 traffic.
switch(config)# port-channel load-balance trident fields ip ingress-interface disabled switch(config)#
port-channel load-balance trident fields ipv6
The port-channel load-balance trident fields ipv6 command specifies the data fields that the port channel load balance hash algorithm uses for distributing IPv6 packets on Trident platform switches. The hashing algorithm fields used for IPv6 packets differ from the fields used for non-IPv6 packets.
The switch calculates a hash value using the packet header fields to load balance packets across links in a port channel. The hash value determines the link through which the packet is transmitted. This method also ensures that all packets in a flow follow the same network path. Packet flow is modified by changing the inputs to the port channel hash algorithm.
In network topologies that include MLAGs, programming all switches to perform the same hash calculation increases the risk of hash polarization, which leads to uneven load distribution among LAG and MLAG member links in MLAG switches. This problem is avoided by performing different hash calculations between the MLAG switch, and a non-peer switch connected to it.
The no port-channel load-balance trident fields ipv6 and default port-channel load-balance trident fields ipv6 commands restore the default data fields for the IPv6 packet load balancing algorithm by removing the port-channel load-balance trident fields ipv6 command from running-config.
Command Mode
Global Configuration
Command Syntax
port-channel load-balance trident fields ipv6 IP_FIELD_NAME
no port-channel load-balance trident fields ipv6
default port-channel load-balance trident fields ipv6
- IP_FIELD_NAME Specifies fields the hashing algorithm uses for Layer 3 routing. Command may include from one to four of the following four options, in any combination and listed in any order.
- destination-ip Algorithm uses destination IPv6 address field.
- source-ip Algorithm uses source IPv6 address field.
- destination-port Algorithm uses destination TCP/UDP port field.
- source-port Algorithm uses source TCP/UDP port field.
- ip-tcp-udp-header Algorithm uses source and destination IPv6 address fields. Source and destination port fields are included for TCP and UDP packets.
Note: This option can’t be used in combination with any other option.
- mac-header Algorithm uses fields specified by port-channel load-balance trident fields mac.
Note: This option can’t be used in combination with any other option.
- ingress-interface Disable from LAG hashing.
Default setting is ip-tcp-udp-header
- ip-tcp-udp-header Algorithm uses source and destination IPv6 address fields. Source and destination port fields are included for TCP and UDP packets.
- The port-channel load-balance command configures the hash seed for the algorithm.
- The port-channel load-balance trident fields ipv6 commands controls the hash algorithm for non-IP packets.
- The port-channel load-balance trident fields mac command controls the hash algorithm for non-IP packets.
- These commands configure the switch’s port channel load balance for IP packets by using the IPv6 source field in the hashing algorithm.
switch(config)# port-channel load-balance trident fields ipv6 source-ip switch(config)# - This command disables the ingress interface for IPv6 traffic.
switch(config)# port-channel load-balance trident fields ipv6 ingress-interface disabled switch(config)#
port-channel load-balance trident fields mac
The port-channel load-balance trident fields mac command specifies data fields that the port channel load balance hash algorithm uses for distributing non-IP packets on Trident platform switches. The hashing algorithm fields used for non-IP packets differ from the fields used for IP packets.
The switch calculates a hash value using the packet header fields to load balance packets across links in a port channel. The hash value determines the link through which the packet is transmitted. This method also ensures that all packets in a flow follow the same network path. Packet flow is modified by changing the inputs to the port channel hash algorithm.
In network topologies that include MLAGs, programming all switches to perform the same hash calculation increases the risk of hash polarization, which leads to uneven load distribution among LAG and MLAG member links in MLAG switches. This problem is avoided by performing different hash calculations between the MLAG switch, and a non-peer switch connected to it.
The no port-channel load-balance trident fields mac and default port-channel load-balance trident fields mac commands restore the default data fields for the non-IP packet load balancing algorithm by removing the port-channel load-balance trident fields mac command from running-config.
Command Mode
Global Configuration
Command Syntax
port-channel load-balance trident fields mac MAC_FIELD_NAME
no port-channel load-balance trident fields mac
default port-channel load-balance trident fields mac
default port-channel load-balance trident fields mac ingress-interface disabled
- MAC_FIELD_NAME Fields the hashing algorithm uses for Layer 2 routing. Options include:
- dst-mac MAC destination field.
- eth-type EtherType field.
- src-mac MAC source field.
- ingress-interface Disable from LAG hashing.
Command may include from one to three fields, in any combination and listed in any order. The default setting is the selection of all fields.
- port-channel load-balance configures the hash seed for the algorithm.
- port-channel load-balance trident fields ip controls the hash algorithm for IP packets.
- port-channel load-balance trident fields ipv6 controls the hash algorithm for IP packets.
- These commands configure the switch’s port channel load balance for non-IP packets by using the MAC destination and Ethernet type fields in the hashing algorithm.
switch(config)# port-channel load-balance trident fields mac dst-mac eth-type switch(config)# - This command disables the ingress interface for IPv4 traffic.
switch(config)# port-channel load-balance trident fields mac ingress-interface disabled switch(config)#
port-channel min-links
The port-channel min-links command specifies the minimum number of interfaces that the configuration mode LAG requires to become active. If there are fewer ports than specified by this command, the port channel interface does not become active. The default min-links value is 0.
The no port-channel min-links and default port-channel min-links commands restore the default min-links setting for the configuration mode LAG by removing the corresponding port-channel min-links command from the configuration.
Command Mode
Interface-Port-Channel Configuration
Command Syntax
port-channel min-links quantity
no port-channel min-links
default port-channel min-links
Parameters
quantity Minimum number of interfaces. Value range varies by platform. Default value is 0.
switch(config)# interface port-channel 13
switch(config-if-Po13)# port-channel min-links 4
switch(config-if-Po13)# show active
interface Port-Channel13
port-channel min-links 4
switch(config-if-Po13)#port-channel min-links review interval
The port-channel min-links review interval command enables or disables timer based min-links review feature for all port-channels.
The no port-channel min-links review interval and default port-channel min-links review intervalcommands restore the default min-links-timeout-base to 180 seconds by removing the corresponding port-channel min-links review interval command from running-config.
Command Mode
Global Configuration
Command Syntax
port-channel min-links review interval timeout (seconds)
no port-channel min-links review interval
default port-channel min-links review interval
Guidelines
- Disables the timer-based min-links review feature for all port-channels.
- For LACP port-channels, it prevents the port-channel from bringing link up (even after one or more member ports were negotiated to collect or distribute (rx or tx)) until there are sufficient member interfaces ready to join the port-channel. Meanwhile, the partner can enable the port-channel link with fewer than required member interfaces. This configuration does not impact port-channels without min-links configuration.
- For LACP port-channels, it prevents the port-channel from bringing link up (even after one or more member ports were negotiated to collect or distribute (rx or tx)) until there are sufficient member interfaces ready to join the port-channel. Meanwhile, the partner can enable the port-channel link with fewer than required member interfaces. This configuration does not impact port-channels without min-links configuration.
Related Command
switch(config)# port-channel min-links review interval 200port-channel speed mixed
The port-channel speed mixed command configures a port channel with the ability to have active members of multiple speeds.
Command Mode
Interface-Port-Channel Configuration
Command Syntax
port-channel speed mixed
Related Commands
The interface port-channel command places the switch in the interface-port-channel configuration mode.
Example
switch(config)# interface port-channel 1
switch(config-if-Po1)# port-channel speed mixedport-channel speed minimum
The port-channel speed minimum command specifies the cumulative minimum speed of all active members in order for a port channel to become active. If there is less than the specified by this command, the port channel interface does not become active.
Command Mode
Interface-Port-Channel Configuration
Command Syntax
port-channel speed minimum speed-value
Parameter
speed-value Minimum speed value. The value ranges from 1 to 65535.
Related Command
The interface port-channel command places the switch in interface-port-channel configuration mode.
Example
switch(config)# interface port-channel 1
switch(config-if-Po1)# port-channel speed minimum 100 gbpsshow lacp aggregates
The show lacp aggregates command displays aggregate IDs and the list of bundled ports for all specified port channels.
Command Mode
EXEC
Command Syntax
show lacp [PORT_LIST] aggregates [PORT_LEVEL] [INFO_LEVEL]
- PORT_LIST Port channels for which aggregate information is displayed. Options include:
- <no parameter> All configured port channels.
- c_range Channel list (number, range, or comma-delimited list of numbers and ranges).
- PORT_LEVEL Ports displayed, in terms of aggregation status. Options include:
- no parameter Ports bundled by LACP into the port channel.
- all-ports All channel group ports, including channel group members not bundled into the port channel interface.
- INFO_LEVEL Amount of information that is displayed. Options include:
- no parameter Aggregate ID and bundled ports for each channel.
- brief Aggregate ID and bundled ports for each channel.
- detailed Aggregate ID and bundled ports for each channel.
switch> show lacp aggregates
Port Channel Port-Channel1:
Aggregate ID:
[(8000,00-1c-73-04-36-d7,0001,0000,0000),(8000,00-1c-73-09-a0-f3,0001,0000,0000)]
Bundled Ports: Ethernet43 Ethernet44 Ethernet45 Ethernet46
Port Channel Port-Channel2:
Aggregate ID:
[(8000,00-1c-73-01-02-1e,0002,0000,0000),(8000,00-1c-73-04-36-d7,0002,0000,0000)]
Bundled Ports: Ethernet47 Ethernet48
Port Channel Port-Channel3:
Aggregate ID:
[(8000,00-1c-73-04-36-d7,0003,0000,0000),(8000,00-1c-73-0c-02-7d,0001,0000,0000)]
Bundled Ports: Ethernet3 Ethernet4
Port Channel Port-Channel4:
Aggregate ID:
[(0001,00-22-b0-57-23-be,0031,0000,0000),(8000,00-1c-73-04-36-d7,0004,0000,0000)]
Bundled Ports: Ethernet1 Ethernet2
Port Channel Port-Channel5:
Aggregate ID:
[(0001,00-22-b0-5a-0c-51,0033,0000,0000),(8000,00-1c-73-04-36-d7,0005,0000,0000)]
Bundled Ports: Ethernet41
switch>show lacp counters
The show lacp counters command displays LACP traffic statistics.
Command Mode
EXEC
Command Syntax
show lacp [PORT_LIST] counters [PORT_LEVEL] [INFO_LEVEL]
- PORT_LIST Ports for which port information is displayed. Options include:
- no parameter All configured port channels.
- c_rangePorts in specified channel list (number, number range, or list of numbers and ranges).
- interface Ports on all interfaces.
- interface ethernet e_num Port on Ethernet interface specified by e_num.
- interface port-channel p_num Port on port channel interface specified by p_num.
- PORT_LEVELPorts displayed, in terms of aggregation status. Options include:
- no parameter Only ports bundled by LACP into an aggregate.
- all-ports All ports, including LACP candidates that are not bundled.
- INFO_LEVEL Amount of information that is displayed. Options include:
- no parameter Displays packet transmission (TX and RX) statistics.
- brief Displays packet transmission (TX and RX) statistics.
- detailed Displays packet transmission (TX and RX) statistics and actor-partner statistics.
switch> show lacp counters brief
LACPDUs Markers Marker Response
Port Status RX TX RX TX RX TX Illegal
------------------------------------------------------------------
Port Channel Port-Channel1:
Et43 Bundled 396979 396959 0 0 0 0 0
Et44 Bundled 396979 396959 0 0 0 0 0
Et45 Bundled 396979 396959 0 0 0 0 0
Et46 Bundled 396979 396959 0 0 0 0 0
Port Channel Port-Channel2:
Et47 Bundled 396836 396883 0 0 0 0 0
Et48 Bundled 396838 396883 0 0 0 0 0
switch>show lacp interface
The show lacp interface command displays port status for all port channels that include the specified interfaces. Within the displays for each listed port channel, the output displays sys-id, partner port, state, actor port, and port priority for each interface in the channel.
Command Mode
EXEC
Command Syntax
show lacp interface [INTERFACE_PORT] [PORT_LEVEL] [INFO_LEVEL]
- INTERFACE_PORT Interfaces for which information is displayed. Options include:
- no parameter All interfaces in channel groups.
- ethernet e_num Ethernet interface specified by e_num.
- port-channel p_num Port channel interface specified by p_num.
- PORT_LEVEL Ports displayed, in terms of aggregation status. Options include:
- no parameter Command lists data for ports bundled by LACP into the aggregate.
- all-ports Command lists data for all ports, including LACP candidates that are not bundled.
- INFO_LEVEL Amount of information that is displayed. Options include:
- no parameter Displays same information as brief option.
- brief Displays LACP configuration data, including sys-id, actor, priorities, and keys.
- detailed Includes brief option information plus state machine data.
switch> show lacp interface
State: A = Active, P = Passive; S=ShortTimeout, L=LongTimeout;
G = Aggregable, I = Individual; s+=InSync, s-=OutOfSync;
C = Collecting, X = state machine expired,
D = Distributing, d = default neighbor state
| Partner Actor
Port Status | Sys-id Port# State OperKey PortPri Port#
----------------------------------------------------------------------------
Port Channel Port-Channel1:
Et43 Bundled | 8000,00-1c-73-09-a0-f3 43 ALGs+CD 0x0001 32768 43
Et44 Bundled | 8000,00-1c-73-09-a0-f3 44 ALGs+CD 0x0001 32768 44
Et45 Bundled | 8000,00-1c-73-09-a0-f3 45 ALGs+CD 0x0001 32768 45
Et46 Bundled | 8000,00-1c-73-09-a0-f3 46 ALGs+CD 0x0001 32768 46
Port Channel Port-Channel2:
Et47 Bundled | 8000,00-1c-73-01-02-1e 23 ALGs+CD 0x0002 32768 47
Et48 Bundled | 8000,00-1c-73-01-02-1e 24 ALGs+CD 0x0002 32768 48
| Actor
Port Status | State OperKey PortPriority
-------------------------------------------------------
Port Channel Port-Channel1:
Et43 Bundled | ALGs+CD 0x0001 32768
Et44 Bundled | ALGs+CD 0x0001 32768
Et45 Bundled | ALGs+CD 0x0001 32768
Et46 Bundled | ALGs+CD 0x0001 32768
Port Channel Port-Channel2:
Et47 Bundled | ALGs+CD 0x0002 32768
Et48 Bundled | ALGs+CD 0x0002 32768
switch>show lacp internal
The show lacp internal command displays the local LACP state for all specified channels. Local state data includes the state machines and LACP protocol information.
Command Mode
EXEC
Command Syntax
show lacp [PORT_LIST] internal [PORT_LEVEL] [INFO_LEVEL]
- PORT_LIST Interface for which port information is displayed. Options include:
- no parameter All configured port channels.
- c_rangePorts in specified channel list (number, number range, or list of numbers and ranges).
- interface Ports on all interfaces.
- interface ethernet e_num Ethernet interface specified by e_num.
- interface port-channel p_num Port channel interface specified by p_num.
- PORT_LEVEL Ports displayed, in terms of aggregation status. Options include:
- no parameter Command lists data for ports bundled by LACP into an aggregate.
- all-ports Command lists data for all ports, including LACP candidates that are not bundled.
- INFO_LEVEL Amount of information that is displayed. Options include:
- no parameter Displays same information as brief option.
- brief Displays LACP configuration data, including sys-id, actor, priorities, and keys.
- detailed Includes brief option information plus state machine data.
Note: PORT_LEVEL and INFO_LEVEL parameters can be placed in any order.
switch> show lacp internal
LACP System-identifier: 8000,00-1c-73-04-36-d7
State: A = Active, P = Passive; S=ShortTimeout, L=LongTimeout;
G = Aggregable, I = Individual; s+=InSync, s-=OutOfSync;
C = Collecting, X = state machine expired,
D = Distributing, d = default neighbor state
|Partner Actor
Port Status | Sys-id Port# State OperKey PortPriority
----------------------------------------------------------------------------
Port Channel Port-Channel1:
Et43 Bundled | 8000,00-1c-73-09-a0-f3 43 ALGs+CD 0x0001 32768
Et44 Bundled | 8000,00-1c-73-09-a0-f3 44 ALGs+CD 0x0001 32768
Et45 Bundled | 8000,00-1c-73-09-a0-f3 45 ALGs+CD 0x0001 32768
Et46 Bundled | 8000,00-1c-73-09-a0-f3 46 ALGs+CD 0x0001 32768show lacp peer
The show lacp peer command displays the LACP protocol state of the remote neighbor for all specified port channels.
Command Mode
EXEC
Command Syntax
show lacp [PORT_LIST] peer [PORT_LEVEL] [INFO_LEVEL]
- PORT_LISTInterface for which port information is displayed. Options include:
- no parameter Displays information for all configured port channels.
- c_range Ports in specified channel list (number, number range, or list of numbers and ranges).
- interface Ports on all interfaces.
- interface ethernet e_num Ethernet interface specified by e_num.
- interface port-channel p_num Port channel interface specified by p_num.
- PORT_LEVEL Ports displayed, in terms of aggregation status. Options include:
- no parameter Command lists data for ports bundled by LACP into an aggregate.
- all-ports Command lists data for all ports, including LACP candidates that are not bundled.
- INFO_LEVEL Amount of information that is displayed. Options include:
- no parameter Displays same information as brief option.
- brief Displays LACP configuration data, including sys-id, actor, priorities, and keys.
- detailed Includes brief option information plus state machine data.
switch> show lacp peer
State: A = Active, P = Passive; S=ShortTimeout, L=LongTimeout;
G = Aggregable, I = Individual; s+=InSync, s-=OutOfSync;
C = Collecting, X = state machine expired,
D = Distributing, d = default neighbor state
| Partner
Port Status | Sys-id Port# State OperKey PortPri
----------------------------------------------------------------------------
Port Channel Port-Channel1:
Et1 Bundled | 8000,00-1c-73-00-13-19 1 ALGs+CD 0x0001 32768
Et2 Bundled | 8000,00-1c-73-00-13-19 2 ALGs+CD 0x0001 32768
Port Channel Port-Channel2:
Et23 Bundled | 8000,00-1c-73-04-36-d7 47 ALGs+CD 0x0002 32768
Et24 Bundled | 8000,00-1c-73-04-36-d7 48 ALGs+CD 0x0002 32768
Port Channel Port-Channel4*:
Et3 Bundled | 8000,00-1c-73-0b-a8-0e 45 ALGs+CD 0x0001 32768
Et4 Bundled | 8000,00-1c-73-0b-a8-0e 46 ALGs+CD 0x0001 32768
Port Channel Port-Channel5*:
Et19 Bundled | 8000,00-1c-73-0c-30-09 49 ALGs+CD 0x0005 32768
Et20 Bundled | 8000,00-1c-73-0c-30-09 50 ALGs+CD 0x0005 32768
Port Channel Port-Channel6*:
Et6 Bundled | 8000,00-1c-73-01-07-b9 49 ALGs+CD 0x0001 32768
Port Channel Port-Channel7*:
Et5 Bundled | 8000,00-1c-73-0f-6b-22 51 ALGs+CD 0x0001 32768
Port Channel Port-Channel8*:
Et10 Bundled | 8000,00-1c-73-10-40-fa 51 ALGs+CD 0x0001 32768
* - Only local interfaces for MLAGs are displayed. Connect to the peer to
see the state for peer interfaces.
switch>show lacp sys-id
The show lacp sys-id command displays the System Identifier the switch uses when negotiating remote LACP implementations.
Command Mode
EXEC
Command Syntax
show lacp sys-id [INFO_LEVEL]
Parameters
- no parameter Displays system identifier.
- brief Displays system identifier.
- detailed Displays system identifier and system priority, including the MAC address.
- This command displays the system identifier.
switch> show lacp sys-id brief 8000,00-1c-73-04-36-d7 - This command displays the system identifier and system priority.
switch> show lacp sys-id detailed System Identifier used by LACP: System priority: 32768 Switch MAC Address: 00:1c:73:04:36:d7 802.11.43 representation: 8000,00-1c-73-04-36-d7
show load-balance profile
The show load-balance profile command displays the contents of the specified load balance profiles. Load balance profiles specify parameters used by hashing algorithms that distribute traffic across ports comprising a port channel or among component ECMP routes.
Command Mode
EXEC
Command Syntax
show load-balance profile [PROFILES]
Parameters
- no parameter Displays all load balance profiles.
- profile_name Displays specified profile.
- load-balance policies places the switch in load-balance-policies configuration mode.
- ingress load-balance profile applies a load-balance profile to an Ethernet or port channel interface.
switch> show load-balance profile LB-1
---------- LB-1 ----------
Source MAC address hashing ON
Destination MAC address hashing ON
Ethernet type hashing ON
VLAN ID hashing ON
IP protocol field hashing ON
DSCP field hashing is ON
Symmetric hashing for non-IP packets OFF
Symmetric hashing for IP packets OFF
Random distribution for port-channel ON
Random distribution for ecmp ON
Profile LB-1 is applied on the following
Port-Channel100
---------- myGlobalProfile (global) ----------
L3 hashing is ON
Symmetric hashing is OFF
Hashing mode is flow-based
Hash polynomial is 3
Hash seed is 0
Profile myGlobalProfile (global) is applied on the following
Linecard3
Linecard4
Linecard5
Linecard6
switch>show port-channel
The show port-channel command displays information about members the specified port channels.
Command Mode
EXEC
Command Syntax
show port-channel [MEMBERS] [PORT_LIST] [INFO_LEVEL]
- MEMBERSList of port channels for which information is displayed. Options include:
- no parameterAll configured port channels.
- p_range Ports in specified channel list (number, number range, or list of numbers and ranges).
- PORT_LEVELPorts displayed, in terms of aggregation status. Options include:
- no parameterDisplays information on ports that are active members of the LAG.
- active-portsDisplays information on ports that are active members of the LAG.
- all-ports Displays information on all ports (active or inactive) configured for LAG.
- INFO_LEVELAmount of information that is displayed. Options include:
- no parameterDisplays information at the brief level.
- briefDisplays information at the brief level.
- detailed Displays information at the detail level.
- Port Channel Type and name of the port channel.
- Time became active Time when the port channel came up.
- Protocol Protocol operating on the port channel.
- Mode Status of the Ethernet interface on the port. The status value is Active or Inactive.
- No active ports Number of active ports on the port channel.
- Configured but inactive ports Ports configured but that are not actively up.
- Reason unconfigured Reason why the port is not part of the LAG.
Guidelines
You can configure a port channel to contain many ports, but only a subset may be active at a time. All active ports in a port channel must be compatible. Compatibility includes many factors and is platform specific. For example, compatibility may require identical operating parameters such as speed and Maximum Transmission Unit (MTU). Compatibility may only be possible between specific ports because of the internal organization of the switch.
- This command displays output from the show port-channel command.
switch> show port-channel 3 Port Channel Port-Channel3: Active Ports: Port Time became active Protocol Mode ----------------------------------------------------------------------- Ethernet3 15:33:41 LACP Active PeerEthernet3 15:33:41 LACP Active - This command displays output from the show port-channel active-ports command.
switch> show port-channel active-ports Port Channel Port-Channel3: No Active Ports Port Channel Port-Channel11: No Active Ports switch> - This command displays output from the show port-channel all-ports command.
switch> show port-channel all-ports Port Channel Port-Channel3: No Active Ports Configured, but inactive ports: Port Time became inactive Reason unconfigured ---------------------------------------------------------------------------- Ethernet3 Always not compatible with aggregate Port Channel Port-Channel11: No Active Ports Configured, but inactive ports: Port Time became inactive Reason unconfigured ---------------------------------------------------------------------------- Ethernet25 Always not compatible with aggregate Ethernet26 Always not compatible with aggregate - This command displays details about the port-channel configuration:
switch#show port-channel 50 detailed Port Channel Port-Channel50 (Fallback State: Unconfigured): Minimum links: unconfigured Minimum speed: unconfigured Current weight/Max weight: 1/16 Active Ports: Port Time Became Active Protocol Mode Weight State -------------------- ------------------------ -------------- ------------ ------------ ------ Ethernet51 Wed 15:19:30 LACP Active 1 Rx,Tx PeerEthernet52 Wed 15:19:28 LACP Active 0 Unknown
This output displays the following information:- Port - the Active ports on an interface.
- Time Became Active - The time when a port came up on the network.
- Protocol - the network protocol associated with the port.
- Mode - the current mode of the port as Active or Inactive.
- Weight - The member port weight is directly proportional to other members speeds and determines the number of packets sent over the member port when it becomes active. For same speed port-channels, all members have a weight of one (1).
- State - the state of the port as receiving (Rx) traffic, transmitting (Tx) traffic, or Unknown.
show port-channel dense
The show port-channel dense command displays the port-channels on the switch and lists their component interfaces, LACP status, and set flags.
Command Mode
EXEC
Command Syntax
show port-channel dense
switch> show port-channel dense
Flags
---------------------------------------------------------------------
a - LACP Active p - LACP Passive
U - In Use D - Down
+ - In-Sync - - Out-of-Sync i - incompatible with agg
P - bundled in Po s - suspended G - Aggregable
I - Individual S - ShortTimeout w - wait for agg
Number of channels in use: 2
Number of aggregators:2
Port-Channel Protocol Ports
-------------------------------------------------------
Po1(U) LACP(a) Et47(PG+) Et48(PG+)
Po2(U) LACP(a) Et39(PG+) Et40(PG+)show port-channel limits
- Max interfaces defines the maximum number of active port channels that may be formed out of these ports.
- Max ports per interface defines the maximum number of active ports allowed in a port channel from the compatibility group.
All active ports in a port channel must be compatible. Compatibility comprises many factors and is specific to a given platform. For example, compatibility may require identical operating parameters such as speed and/or Maximum Transmission Unit (MTU). Compatibility may only be possible between specific ports because of internal organization of the switch.
Command Mode
EXEC
Command Syntax
show port-channel limits
switch> show port-channel limits
LAG Group: focalpoint
--------------------------------------------------------------------------
Max port-channels per group: 24, Max ports per port-channel: 16
24 compatible ports: Ethernet1 Ethernet2 Ethernet3 Ethernet4
Ethernet5 Ethernet6 Ethernet7 Ethernet8
Ethernet9 Ethernet10 Ethernet11 Ethernet12
Ethernet13 Ethernet14 Ethernet15 Ethernet16
Ethernet17 Ethernet18 Ethernet19 Ethernet20
Ethernet21 Ethernet22 Ethernet23 Ethernet24
--------------------------------------------------------------------------show port-channel load-balance fields
The show port-channel load-balance fields command displays the fields that the hashing algorithm uses to distribute traffic across the interfaces that comprise the port channels.
Command Mode
EXEC
Command Syntax
show port-channel load-balance HARDWARE fields
Parameters
- arad
- fm6000
- petraA
- trident
switch> show port-channel load-balance fm6000 fields
Source MAC address hashing for non-IP packets is ON
Destination MAC address hashing for non-IP packets is ON
Ethernet type hashing for non-IP packets is ON
VLAN ID hashing for non-IP packets is ON
VLAN priority hashing for non-IP packets is ON
Source MAC address hashing for IP packets is ON
Destination MAC address hashing for IP packets is ON
Ethernet type hashing for IP packets is ON
VLAN ID hashing for IP packets is ON
VLAN priority hashing for IP packets is ON
IP source address hashing is ON
IP destination address hashing is ON
IP protocol field hashing is ON
TCP/UDP source port hashing is ON
TCP/UDP destination port hashing is ON
switch>show port-channel load-balance
The show port-channel load-balance command displays the traffic distribution between the member ports of the specified port channels. The command displays distribution for unicast, multicast, and broadcast streams.
The distribution values displayed are based on the total interface counters which start from 0 at boot time or when the counters are cleared. For more current traffic distribution values, clear the interface counters of the member interfaces using the clear counters command.
Command Mode
EXEC
Command Syntax
show port-channel load-balance [MEMBERS]
Parameters
- no parameter all configured port channels.
- c_range ports in specified channel list (number, number range, or list of numbers and ranges).
Example
switch> show port-channel load-balance
ChanId Port Rx-Ucst Tx-Ucst Rx-Mcst Tx-Mcst Rx-Bcst Tx-Bcst
------ --------- ------- ------- ------- ------- ------- -------
8 Et10 100.00% 100.00% 100.00% 100.00% 0.00% 100.00%
------ --------- ------- ------- ------- ------- ------- -------
1 Et1 13.97% 42.37% 47.71% 30.94% 0.43% 99.84%
1 Et2 86.03% 57.63% 52.29% 69.06% 99.57% 0.16%
------ --------- ------- ------- ------- ------- ------- -------
2 Et23 48.27% 50.71% 26.79% 73.22% 0.00% 100.00%
2 Et24 51.73% 49.29% 73.21% 26.78% 0.00% 0.00%
------ --------- ------- ------- ------- ------- ------- -------
4 Et3 55.97% 63.29% 51.32% 73.49% 0.00% 0.00%
4 Et4 44.03% 36.71% 48.68% 26.51% 0.00% 0.00%
------ --------- ------- ------- ------- ------- ------- -------
5 Et19 39.64% 37.71% 50.00% 90.71% 0.00% 0.00%
5 Et20 60.36% 62.29% 50.00% 9.29% 0.00% 100.00%
------ --------- ------- ------- ------- ------- ------- -------
6 Et6 100.00% 100.00% 100.00% 100.00% 0.00% 100.00%
------ --------- ------- ------- ------- ------- ------- -------
7 Et5 100.00% 0.00% 100.00% 100.00% 0.00% 0.00%
switch>