Latency Analyzer (LANZ)

Arista Networks’ Latency Analyzer (LANZ) is a family of eos features that provide enhanced visibility into network dynamics, particularly in areas related to the delay packets experience through the network. The LANZ feature is available on the FM6000, Arad, Trident II, Trident 3, Jericho, Tomahawk, and XP80 switch platforms.

This section describes the purpose, behavior, and configuration of LANZ features. Topics covered by this section include:

Introduction to LANZ
LANZ Overview
Configuring LANZ
LANZ Commands

Introduction to LANZ

LANZ tracks interface congestion and queuing latency with real-time reporting. With LANZ application layer event export, external applications can predict impending congestion and latency. This enables the application layer to make traffic routing decisions with visibility into the network layer.

With LANZ, network operations teams and administrators have near real-time visibility into the network, enabling early detection of microbursts. LANZ continually monitors congestion, allowing for rapid congestion detection and sending of application layer messages.

LANZ Overview

LANZ monitors output queue lengths to provide congestion information for individual interfaces. This allows for detailed analysis of congestion events and identification of potential latency problems before they arise. On some platforms, LANZ also monitors global buffer usage.

Output queues for each port are monitored, and information about queue congestion events can be accessed in the form of system log messages, reports, or streaming.

LANZ monitoring Mechanism

LANZ provides congestion data by continuously monitoring each port’s output queue lengths. When the length of an output queue exceeds the upper threshold for that port, LANZ generates an over-threshold event.

Notifying and Polling Modes

Notifying Mode

In Notifying Mode (available on all platforms), LANZ monitors congestions on all queues and generates Start, Update, and End events every five seconds or at user-configured intervals.

Start event is generated when any queue on an interface exceeds the upper threshold.
Update events are generated periodically while the congested queue remains above the lower threshold. The interval at which Update events are generated is configured using the queue-monitor length update-interval command.
End event is generated when the congested queue drops below the lower threshold.

Polling Mode

Polling Mode is available only on Arad and Jericho switches. On these switches, LANZ can be configured to use Notifying Mode, but it operates in Polling Mode by default. In Polling Mode, LANZ polls the most congested queue in each ASIC and continues to report an over-threshold state every 800 microseconds until all queue lengths for the port pass below the lower threshold.

LANZ Logging

Over-threshold events generated by LANZ can be logged as system log messages. Log messages are generated for events on all ports at a maximum rate of one message per second per interface. You can configure the interval between messages globally.

Log messages indicate the time of the event, the interface affected, the threshold set for that interface, and the number of entries in the port’s queue.

LANZ Reporting

You can view detailed LANZ data through the CLI or export it as a CSV-formatted report.

All interfaces dynamically share a circular FIFO event buffer. When an interface generates LANZ over-threshold events, it can fill all available buffer space. However, each interface is guaranteed sufficient resources for a minimum of 500 entries.

LANZ Streaming

On some platforms, external client applications can also receive congestion event information as a data stream. The switch can stream LANZ data to up to 100 clients via TCP through port 50001.

Streamed data is in Google protocol buffer format and includes both over-threshold events and LANZ configuration information.

Configuring LANZ

LANZ is disabled by default and must be enabled to function. You can define upper and lower queue-length thresholds for individual interfaces.

These sections describe the basic LANZ configuration steps:

Enabling and Disabling LANZ
Specifying the LANZ Mode on Jericho and Arad Switches
Configuring LANZ Congestion Thresholds
Setting LANZ Traffic Sampling
Logging LANZ Congestion events
Viewing LANZ Data
Streaming LANZ Data

Enabling and Disabling LANZ

LANZ is enabled by default on Sand platform switches (those with Arad, Jericho, or Qumran chipsets), allowing the switch to collect and display latency information. LANZ is disabled by default on all other switches. If LANZ is disabled, the queue-monitor length (global configuration mode) command enables LANZ with the current settings, or with the default settings if none have been configured.

When LANZ is enabled, the switch monitors queue lengths on all front-panel ports and on CPU and fabric ports on selected platforms. Queue length data is available in the following forms:

syslog data (see queue-monitor length log)
CLI display or CSV-format output (see show queue-monitor length)
data stream (see queue-monitor streaming)

To disable LANZ globally, enter the no queue-monitor length command in global configuration mode. Disabling LANZ globally also discards LANZ log data, but retains settings. To disable LANZ on an individual interface, enter the no queue-monitor length command in interface Ethernet configuration mode.

Examples

This command enables LANZ on the switch.

switch(config)# queue-monitor length
switch(config)#

This command disables LANZ on the switch.

switch(config)# no queue-monitor length
switch(config)#

These commands disable LANZ on Ethernet interface 7.

switch(config)# interface ethernet 7
switch(config-if-Et7)# no queue-monitor length
switch(config-if-Et7)#

Specifying the LANZ Mode on Jericho and Arad Switches

On Jericho and Arad switches, LANZ operates by default in Polling Mode, which provides congestion data for the most congested queue per ASIC. They also support Notifying Mode (the LANZ mode used on all other switches), which generates Start, Update, and End events for all queues.

Notifying Mode is enabled using the queue-monitor length notifying command.

Examples

This command enables Notifying Mode on a Jericho or Arad switch.
```
switch(config)# queue-monitor length notifying 
```
This command disables Notifying Mode on a Jericho or Arad switch, returning LANZ to the default Polling Mode.
```
switch(config)# no queue-monitor length notifying 
```

Configuring LANZ Congestion Thresholds

When LANZ is enabled on the switch, it generates over-threshold events when queue lengths on any monitored interface exceed the upper threshold value and continues generating them until all the queue lengths on that interface drop back below the lower threshold.

Setting the Congestion Update Interval

The queue-monitor length update-interval command specifies the frequency with which congestion information is updated in microseconds.

This command sets the time between congestion updates to 10 seconds.

switch(config)# queue-monitor length update-interval 10000000
switch(config)#

This command resets the time between congestion updates to its default value of 5 seconds.
```
switch(config)# default queue-monitor length update-interval
switch(config)#
```

Congestion Thresholds on FM6000, Trident II, Trident 3, and Tomahawk Switches

Queue lengths are measured in 480-byte segments on FM6000 switches, in 208-byte segments on Trident II and Tomahawk switches, and in 256-byte segments on Trident 3 switches. The default threshold values are 512 segments and 256 segments. To change the threshold values for a specific interface, use the queue-monitor length thresholds command.

FM6000 switches can also monitor global buffer usage. Global buffers are measured in 160-byte segments; the default threshold values are 10940 segments and 4376 segments. To enable global buffer monitoring, use the queue-monitor length global-buffer command. To change the threshold values for global buffer usage monitoring on the switch, use the queue-monitor length global-buffer thresholds command.

Examples

These commands set the upper and lower queue-length thresholds on interface ethernet 5 to 300 segments and 200 segments.

switch(config)# interface ethernet 5
switch(config-if-Et5)# queue-monitor length thresholds 300 200
switch(config-if-Et5)#

These commands enable global buffer monitoring on the switch and set the upper and lower thresholds to 9000 segments and 4000 segments.

switch(config)# queue-monitor length global-buffer
switch(config)# queue-monitor length global-buffer thresholds 9000 4000
switch(config)#

Congestion Thresholds on Arad Switches

Queue lengths are measured in bytes. The top threshold value can be between 2 and 52428800 bytes (the default value is 52428800 bytes). To change the upper threshold value for a specific interface, use the queue-monitor length threshold (Arad/Jericho/Qumran) command.

Example

These commands set the upper queue-length threshold on interface ethernet 5 to 2614400 bytes.

switch(config)# interface ethernet 5
switch(config-if-Et5)# queue-monitor length thresholds 2614400
switch(config-if-Et5)#

CPU Port Congestion Thresholds

CPU port queue lengths are also monitored on selected platforms. All CPU ports share common threshold values, which are configured using the queue-monitor length cpu thresholds command. Individual CPU port congestion thresholds cannot be separately configured.

Examples

This command sets the upper queue-length threshold for congestion monitoring on all CPU ports to 1000 segments and the lower limit to 300 segments.
```
switch(config)# queue-monitor length cpu thresholds 1000 300
switch(config)#
```
This command resets the queue-length thresholds for CPU port congestion to the default values of 512 and 256.
```
switch(config)# default queue-monitor length cpu thresholds
switch(config)#
```

Fabric Port Congestion Thresholds

Fabric port queue lengths are also monitored on selected platforms. All fabric ports share common threshold values, which are configured using the queue-monitor length fabric thresholds command. You cannot configure individual fabric port congestion thresholds separately.

Examples

This command sets the upper queue-length threshold for congestion monitoring on all fabric ports to 1000 segments and the lower limit to 300 segments.
```
switch(config)# queue-monitor length fabric thresholds 1000 300
switch(config)#
```
This command resets the queue-length thresholds for fabric port congestion to the default values of 512 and 256.
```
switch(config)# default queue-monitor length fabric thresholds
switch(config)#
```

Setting LANZ Traffic Sampling

To configure the switch to automatically send congested traffic to either the CPU or an Ethernet egress interface destination when congestion crosses a queue threshold, enable LANZ mirroring through the queue-monitor length mirror command, then configure the CPU or an egress interface mirror destination to receive the mirrored packets using the queue-monitor length mirror destination command. LANZ traffic sampling includes exporting congested traffic to a packet-capture device or another tool for analysis or directly to the switch CPU for inspection through the tcpdump queue-monitor command.

Examples

This command enables LANZ traffic sampling.

switch(config)#queue-monitor length mirror
switch(config)#

This command disables LANZ traffic sampling.

switch(config)#no queue-monitor length mirror
switch(config)#

This command configures eos to send LANZ traffic samples to a CPU.

switch(config)#queue-monitor length mirror destination cpu
switch(config)#

This command configures eos to send LANZ traffic samples to ports 1 through 5.

switch(config)#queue-monitor length mirror destination Ethernet 1-5
switch(config)#

This command configures eos to send LANZ traffic samples to ports 6, 10, and 12 through 14.

switch(config)#queue-monitor length mirror destination Ethernet 6,10,12-14
switch(config)#

This command inspects traffic on the switch.

switch(config)#tcpdump queue-monitor
tcpdump: WARNING: lanz: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on lanz, link-type EN10MB (Ethernet), capture size 65535 bytes
...
0 packets captured
0 packets received by filter
0 packets dropped by kernel
switch(config)#

Logging LANZ Congestion events

To generate syslog messages when queue lengths on an interface exceed its upper threshold, enable logging with the queue-monitor length log command. When logging is enabled, LANZ generates a log message each time one or more queues on an interface exceed the upper threshold value for that interface (see queue-monitor length threshold (Arad/Jericho/Qumran) or queue-monitor length thresholds). When an interface is over-threshold, additional messages are generated at a maximum rate of one per interval as long as the queue length remains above the lower threshold for that interface. LANZ does not generate a syslog message when the queue length drops back below the threshold.

Queue length information is not included in log messages, but you can access it by displaying LANZ data or exporting reports.

On FM6000 platforms, you can also configure LANZ to generate log messages whenever global buffer usage exceeds its upper threshold value (see queue-monitor length global-buffer thresholds). To enable global buffer monitoring, use the queue-monitor length global-buffer command. To log over-threshold events for the global buffer, use the queue-monitor length global-buffer log command.

Examples

This command enables queue-length over-threshold logging with a minimum interval of 10 seconds between messages for a given interface.
```
switch(config)# queue-monitor length log 10
```
This command turns off queue-length over-threshold logging on the switch.
```
switch(config)# queue-monitor length log 0
```

This is an example of a queue-length log message.

Oct 27 12:48:22 switch QUEUE_monitor-6-LENGTH_OVER_THRESHOLD: Interface
Ethernet6 queue length is over threshold of 512, current length is 1024.

This command enables global buffer over-threshold logging on the switch with a minimum interval of 60 seconds between messages.
```
witch(config)# queue-monitor length global-buffer log 60
```

Viewing LANZ Data

LANZ status and the data stored in the LANZ data buffer can be viewed using the CLI. Output varies by switch platform and can be limited to a specified number of records.

Viewing LANZ Data on Arad Platform Switches

When LANZ is enabled on an Arad platform switch, the show queue-monitor length command displays a report of recent over-threshold events for a range of interfaces or for all interfaces. By default, the command displays data for all interfaces, limited to the last 1000 records, with the most recent events listed first. Use theshow queue-monitor length limit command to view a subset of the LANZ data limited to a specified number of records.

Example

This command displays the last 100 records for Ethernet interfaces 6 through 8.

switch# show queue-monitor length ethernet 6-8 limit 100
Report generated at 2010-01-01 12:56:13

Time                        Interface   Queue length (segments, 1 to 512 bytes)
-------------------------------------------------------------------------------
0:00:07.43393 ago           Et6         1049
0:00:39.22856 ago           Et7         2039
1 day, 4:33:23.12345 ago    Et6         1077

To view the current LANZ configuration for the switch and for each interface, use the show queue-monitor length status command.

Example

This command displays LANZ configuration and status information.

switch(config)# show queue-monitor length status
Per-Interface Queue Length monitoring
-------------------------------------
Queue length monitoring is enabled
Maximum queue length in bytes : 52428800
Port threshold in bytes:
Port     High threshold
Et3/1           5242880
Et3/2           5242880
Et3/3           5242880
Et3/4           5242880
Et3/5           5242880

Viewing LANZ Data on FM6000, Trident II, Trident 3, and Tomahawk Platform Switches

When LANZ is enabled on an FM6000, Trident II, Trident 3, or Tomahawk platform switch, the show queue-monitor length command displays a report of recent over-threshold events for a range of interfaces or for all interfaces. By default, the command displays data for all interfaces, limited to the last 1000 records, with the most recent events listed first. To view a subset of the LANZ data limited to a specified number of records, use the show queue-monitor length limit command.

Example

This command displays the last 100 records for Ethernet interfaces 6 through 8.

switch# show queue-monitor length ethernet 6-8 limit 100
Report generated at 2010-01-01 12:56:13

Time                        Interface   Queue length (segments, 1 to 512 bytes)
-------------------------------------------------------------------------------
0:00:07.43393 ago           Et6         1049
0:00:39.22856 ago           Et7         2039
1 day, 4:33:23.12345 ago    Et6         1077

To view the current LANZ configuration for the switch and for each interface, use the show queue-monitor length status command.

Example

This command displays LANZ configuration and status information.

switch(config)# show queue-monitor length status
queue-monitor length enabled
Global Buffer monitoring
------------------------
Global buffer monitoring is enabled
Segment size in bytes :   160
Total buffers in segments : 36864
High threshold : 10940
Low threshold :  4376


Per-Interface Queue Length monitoring
-------------------------------------
Queue length monitoring is enabled
Segment size in bytes :   480
Maximum queue length in segments :  3647
Port thresholds in segments:
Port     High threshold  Low threshold
Et1                 512            256
Et2                 512            256
Et3                 512            256
Et4                 512            256
Et5                 512            256

To view all available LANZ records, use the show queue-monitor length all command.

Example

This command displays all available LANZ records.

switch> show queue-monitor length all

Report generated at 2013-04-01 13:23:13
E-End, U-Update, S-Start, TC-Traffic Class
GH-High, GU-Update, GL-Low
Segment size for E, U and S congestion records is 480 bytes
Segment size for GL, GU and GH congestion records is 160 bytes
* Max queue length during period of congestion
+ Period of congestion exceeded counter
-------------------------------------------------------------------------------
-
Type    Time                   Intf    Congestion     Queue       Time of Max
                               (TC)    duration       length      Queue length
                                       (usecs)        (segments)  relative to
                                                                  congestion
                                                                  start
                                                                  (usecs)
-------------------------------------------------------------------------------
-
E  0:00:00.07567 ago         Et22(7)   >=71 mins      20*         30us
GU 0:00:00.15325 ago         N/A       N/A            5695        N/A           
U  0:00:00.19859 ago         Et4(1)    N/A            5693        N/A           
GU 0:00:00.95330 ago         N/A       N/A            5696        N/A           
U  0:00:00.99859 ago         Et4(1)    N/A            5695        N/A 
E  0:00:01.28821 ago         Et44(1)   9672us         2502*       7294us
S  0:00:01.17591 ago         Et22(7)   N/A            26          N/A
U  0:00:03.08248 ago         Et44(1)   N/A            50          N/A
S  12days,8:56:44.07567 ago  Et44(1)   N/A            20          N/A
switch>

On the FM6000, Trident II, Trident 3, and Tomahawk platforms, information is also available for the number of dropped packets (see show queue-monitor length drops) and transmission latency (see show queue-monitor length tx-latency); global buffer usage can also be viewed on FM6000 platforms (see show queue-monitor length global-buffer).

Streaming LANZ Data

You can configure the switch to stream LANZ congestion and configuration data to support analysis of latency conditions. The switch streams LANZ data via TCP in Google protocol buffer format through port 50001 and through the management interface.

You must create a client application to receive the streaming data. By default, the switch will accept up to 10 client connections for streaming LANZ data. LANZ data. You can configure this limit up to a maximum of 100. Maximum connections can be configured when LANZ is disabled.

Enabling and Disabling LANZ Data Streaming

LANZ data streaming is disabled by default. To enable streaming, issue the no show queue-monitor streaming clients command in queue-monitor streaming configuration mode. To disable streaming, use the show queue-monitor streaming clients command.

When streaming is disabled, LANZ sends a message to any connected clients, and the connections are closed.

To ensure client access to LANZ data, add a rule to any relevant ACL permitting traffic destined for the LANZ port (50001) before initiating a client connection for streaming from a remote host. A static rule (sequence number 130) in the default control plane ACL permits LANZ traffic, but you must add a similar rule to any user-created ACL.

Examples

These commands enable the streaming of LANZ data from the switch.

switch(config)# queue-monitor streaming
switch(config-qm-streaming)# no shutdown
switch(config-qm-streaming)#

These commands disable LANZ data streaming.

switch(config)# queue-monitor streaming
switch(config-qm-streaming)# shutdown
switch(config-qm-streaming)#

Configuring Maximum Connections

By default, the switch will accept a maximum of 10 client connections for LANZ data streaming. You can configure this maximum using the max-connections command. If a client connects to the switch after the limit has been reached, an error message is sent and the connection is closed.

Example

This command sets the maximum number of client connections for LANZ data streaming to 50.

switch(config-qm-streaming)# max-connections 50

LANZ Streaming Messages

When streaming is enabled, LANZ sends a message whenever a congestion event or a configuration event occurs. The messages are streamed in Google protocol buffer format.

Configuration Messages

LANZ sends a configuration message whenever a change is made to the LANZ configuration settings on the switch. The switch also sends a configuration message when a new client connection is established.

The configuration message includes the following information:

timestamp time of change in configuration in tens of microseconds (UTC).
lanzVersion LANZ feature version.
numOfPorts number of ports in the switch.
segmentSize segment size.
maxQueueSize maximum queue size in segments.
qLenInterval frequency of updates.
intfName name of the port.
switchId ID of the chip on a multi-chip system.
portId ID of the port.
internalPort “true” if it is an internal port.
highThreshold higher threshold value.
lowThreshold lower threshold value.

Congestion Messages

LANZ sends a congestion message whenever it generates an over-threshold event.

The congestion message includes the following information:

timestamp time of congestion in micro-seconds (UTC).
intfName name of the port.
switchId ID of the chip on a multi-chip system.
portId ID of the port.
queueSize queue size in segments at time of congestion.

Creating the LANZ Client

For a client device to receive streaming data from the LANZ server, it must be running a client application designed to receive LANZ data. Client programs must be based on the Google protocol buffer schema file describing the structure of the congestion and configuration messages that LANZ streams.

Google Protocol Buffers

Google protocol buffers provide an efficient mechanism for serializing LANZ data for streaming. A protocol buffer package is needed to run a LANZ client.

The latest version of the Google protocol buffer source code is available at this address: http://code.google.com/p/protobuf/downloads/list

LANZ Message Schema

LANZ client applications must be designed based on the LANZ protocol buffer schema, which defines the format and contents of the streamed messages. The schema file is shown below, and is also available in the Extensions/LANZ directory on this page: https://www.arista.com/en/support/software-download

package LanzProtobuf;

message ConfigRecord { 
required uint64 timestamp = 1; // Time of change in configuration in 
micro-seconds (UTC) 
required uint32 lanzVersion = 2; // LANZ feature version 
required uint32 numOfPorts = 3; // Num of ports in the switch 
required uint32 segmentSize = 4; // Segement size 
required uint32 maxQueueSize = 5; // Maximum queue size in segments 
optional uint32 qLenInterval = 10; // Frequency of update 
message PortConfigRecord { 
required string intfName = 1; // Name of the port 
required uint32 switchId = 2; // Id of the chip on a multi-chip system 
required uint32 portId = 3; // Id of the port 
required bool internalPort = 4; // 'True' if it's an internal port 
required uint32 highThreshold = 5; // Higher threshold 
required uint32 lowThreshold = 6; // Lower threshold 
}

repeated PortConfigRecord portConfigRecord = 6; // Lanz config details of each 
port 
}

message CongestionRecord { 
required uint64 timestamp = 1; // Time of congestion in micro-seconds 
(UTC)
required string intfName = 2; // Name of the port 
required uint32 switchId = 3; // Id of the chip on a multi-chip system 
required uint32 portId = 4; // Id of the port 
required uint32 queueSize = 5; // Queue size in segments at time of 
congestion 
}

message ErrorRecord { 
required uint64 timestamp = 1; // Time of event in micro-seconds (UTC) 
required string errorMessage = 2; // Text message 
}

message LanzRecord { 
optional ConfigRecord configRecord = 1; 
optional CongestionRecord congestionRecord = 2; 
optional ErrorRecord errorRecord = 3; 
}

Implementation Procedure

The following steps create and install a functional client to receive streamed LANZ data. This procedure assumes a functional Python programming environment.

Download the example client (lanz_client.py) from the Arista website. It is available in the Extensions/LANZ directory on this page: https://www.arista.com/en/support/software-download
Decompress the GPB archive to a directory.
Run the GPB C++ compilation and install. With default flags using GNU Compiler Collection (GCC) on *nix platforms, this will produce a binary called protoc in your /usr/local/bin directory.
From the archive root, cd to python, and run the following commands:
- python setup.py build
- python setup.py tests
Next, use the protoc compiler to convert the Lanz.proto file into a Python program called Lanz_pb2.py, used by the client. The command to do so is:
- protoc --python_out=. Lanz.proto
- The --python_out=. flag drops the compiled Python program in the directory where you ran the command.
Run lanz_client.py -h to activate the LANZ client.

LANZ Commands

clear queue-monitor length statistics

The clear queue-monitor length statistics command resets the occurrences of all over-threshold events on the switch, including global buffer information (if supported).

Command Mode

Privileged EXEC

Command Syntax

clear queue-monitor length statistics

Example

This command resets all over-threshold events and global buffer information on an FM6000 switch.

switch# clear queue-monitor length statistics
switch#

max-connections

The max-connections command sets the maximum number of client connections the switch accepts for streaming LANZ data. The default maximum is 10 connections. To stream LANZ data, you must use the queue-monitor streaming command to enable LANZ data streaming.

Command Mode

Queue-monitor-Streaming Configuration

Command Syntax

max-connections connections

Parameter

connections maximum number of simultaneous LANZ streaming client connections the switch will accept. Values range from 1 through 100.

Example

This command sets the maximum number of client connections the switch accepts for LANZ data streaming to 50.

switch(config-qm-streaming)# max-connections 50
switch(config-qm-streaming)#

queue-monitor length (global configuration mode)

The queue-monitor length (global configuration mode) command enables LANZ with the current settings, or with the default settings if LANZ has not yet been configured. LANZ is enabled by default on Sand platform switches (those with Arad, Jericho, or Qumran chipsets) and disabled by default on all other switches.

When LANZ is enabled, the switch monitors queue lengths on all ports and generates over-threshold events when an output queue becomes congested. Over-threshold event data is available in the following forms:

syslog data (see queue-monitor length log).
CLI display or CSV-format output (see show queue-monitor length).
data stream (see queue-monitor streaming).

The no queue-monitor length command entered in global configuration mode disables LANZ and discards LANZ log data, but retains settings. LANZ settings include:

logging settings (see queue-monitor length log).
queue length thresholds (see queue-monitor length threshold (Arad/Jericho/Qumran) or queue-monitor length thresholds).
data streaming settings (see queue-monitor streaming).

To disable LANZ on an interface, use the no queue-monitor length command in interface configuration mode.

Command Mode

Global Configuration

Command Syntax

queue-monitor length

no queue-monitor length

default queue-monitor length

Examples

This command enables LANZ on the switch.

switch(config)# queue-monitor length
switch(config)#

This command disables LANZ on the switch and discards LANZ data but maintains configurations.
```
switch(config)# no queue-monitor length
switch(config)#
```

This command disables LANZ on Ethernet interface 3/30.

switch(config)# interface ethernet 3/30
switch(config-if-Et3/30)# no queue-monitor length
switch(config-if-Et3/30)#

queue-monitor length cpu thresholds

The queue-monitor length cpu thresholds command sets the queue length threshold to define “congested” on all CPU ports for purposes of LANZ reporting. If LANZ is enabled (see queue-monitor length (global configuration mode)), an over-threshold event is generated when one or more queues on a CPU interface exceed the upper threshold, and over-threshold events continue to be generated until all queue lengths on the interface drop below the lower threshold. (To log these events, use the queue-monitor length log command.) Different monitoring thresholds cannot be set for individual CPU ports.

The no queue-monitor length cpu thresholds and default queue-monitor length cpu thresholds commands reset thresholds to the default values (high: 512 segments; low: 256 segments).

Command Mode

Global Configuration

Command Syntax

queue-monitor length cpu thresholds [upper_limit | lower_limit]

no queue-monitor length cpu thresholds

default queue-monitor length cpu thresholds

Parameters

upper_limit is the queue length in segments that triggers an over-threshold event. Values range from 8 to 16382. Default setting is 512. Segment size varies by platform.
lower_limit When logging is enabled, an over-threshold interface continues generating over-threshold events until all its queues drop back below this length. Must be lower than upper_limit. Values range from 1 to 16382. Default setting is 256.

Examples

This command sets the upper queue-length threshold for congestion monitoring on all CPU ports to 1000 segments and the lower limit to 300 segments.
```
switch(config)# queue-monitor length cpu thresholds 1000 300
switch(config)#
```
This command resets the queue-length thresholds for CPU port congestion to the default values of 512 and 256.
```
switch(config)# default queue-monitor length cpu thresholds
switch(config)#
```

queue-monitor length fabric thresholds

The queue-monitor length fabric thresholds command sets the queue-monitor length thresholds to define “congested” on all fabric ports for purposes of LANZ reporting. If LANZ is enabled (see queue-monitor length (global configuration mode)), an over-threshold event is generated when one or more queues on a fabric interface exceed the upper threshold, and over-threshold events continue to be generated until all queue lengths on the interface drop below the lower threshold. (To log these events, use the queue-monitor length log command.) Different monitoring thresholds cannot be set for individual fabric ports.

The no queue-monitor length fabric thresholds and default queue-monitor length fabric thresholds commands reset thresholds to the default values (high: 512 segments; low: 256 segments).

Command Mode

Global Configuration

Command Syntax

queue-monitor length fabric thresholds [upper_limit | lower_limit]

no queue-monitor length fabric thresholds

default queue-monitor length fabric thresholds

Parameters

upper_limit is the queue length in segments that triggers an over-threshold event. Values range from 8 to 16382. Default setting is 512. Segment size varies by platform.
lower_limit When logging is enabled, an over-threshold interface continues generating over-threshold events until all its queues drop back below this length. Must be lower than upper_limit. Values range from 1 to 16382. Default setting is 256.

Examples

This command sets the upper queue-length threshold for congestion monitoring on all fabric ports to 1000 segments and the lower limit to 300 segments.
```
switch(config)# queue-monitor length fabric thresholds 1000 300
switch(config)#
```
This command resets the queue-length thresholds for fabric port congestion to the default values of 512 and 256.
```
switch(config)# default queue-monitor length fabric thresholds
switch(config)#
```

queue-monitor length global-buffer log

The queue-monitor length global-buffer log command enables logging of global buffer over-threshold events. When logging is enabled, a log message is generated each time the contents of the global buffer exceed the upper threshold value set for the switch (see queue-monitor length global-buffer thresholds). Once the global buffer is over the threshold, additional messages are generated at a maximum rate of one per interval as long as the buffer value remains above the lower threshold for the switch.

Global buffer logging is disabled by default.

Log messages do not include buffer usage or congestion information. To view this information, use the show queue-monitor length global-buffer command.

The no queue-monitor length global-buffer log and default queue-monitor length global-buffer log commands disable global buffer logging by removing the corresponding queue-monitor length global-buffer log command from running-config. The queue-monitor length global-buffer log command with an interval value of 0 also disables global buffer logging.

Command Mode

Global Configuration

Command Syntax

queue-monitor length global-buffer log interval

no queue-monitor length global-buffer log

default queue-monitor length global-buffer log

Parameters

interval minimum interval in seconds between logged messages.

0 global buffer logging is disabled on the switch (the default setting).
1 to 65535 minimum logging interval (in seconds).

Guidelines

This command is available on FM6000 platform switches.

Examples

This command enables global buffer logging with a minimum interval of 10 seconds between messages.
```
switch(config)# queue-monitor length global-buffer log 10
```

This command disables global buffer logging on the switch.

switch(config)# no queue-monitor length global-buffer log

queue-monitor length global-buffer thresholds

The queue-monitor length global-buffer thresholds command sets global buffer thresholds for the switch. An over-threshold event is generated when usage of the global buffer exceeds the upper threshold, and over-threshold events continue to be generated until usage drops below the lower threshold. (To log these events, use the queue-monitor length global-buffer log command.)

The no queue-monitor length global-buffer and default queue-monitor length global-buffer commands disable global buffer reporting.

The no queue-monitor length global-buffer thresholds and default queue-monitor length global-buffer thresholds commands erase custom global buffer threshold settings.

Command Mode

Global Configuration

Command Syntax

queue-monitor length global-buffer thresholds max_segments min_segments

no queue-monitor length global-buffer log

default queue-monitor length global-buffer log

Parameters

max_segments upper threshold in 160-byte segments. Value ranges from 2 to 36864. Default is 10940.
min_segments lower threshold in 160-byte segments. Value ranges from 1 to 36864. Default is 4376.

Examples

This command sets the upper and lower global buffer thresholds to 9000 segments and 3000 segments.
```
switch(config)# queue-monitor length global-buffer thresholds 9000 3000
switch(config)#
```

This command resets the upper and lower global buffer thresholds to their default values.

switch(config)# no queue-monitor length global-buffer thresholds 9000 3000
switch(config)#

queue-monitor length global-buffer

The queue-monitor length global-buffer command includes global buffer usage in LANZ reporting.

When global buffer reporting is enabled, over-threshold events are generated when global buffer usage exceeds the upper threshold. To set the threshold value, use the queue-monitor length global-buffer thresholds command. Usage data may be viewed using the show queue-monitor length global-buffer command. To view status and threshold information, use the show queue-monitor length status command.

Global buffer usage is measured in segments of 160 bytes.

The no queue-monitor length global-buffer and default queue-monitor length global-buffer commands disable global buffer usage reporting by removing the corresponding queue-monitor length global-buffer command from running-config.

Command Mode

Global Configuration

Command Syntax

queue-monitor length global-buffer

no queue-monitor length global-buffer

default queue-monitor length global-buffer

Guidelines

This command is available on FM6000 platform switches.

Examples

This command enables global buffer monitoring on the switch.

switch(config)# queue-monitor length global-buffer
switch(config)#

This command disables global buffer monitoring on the switch.

switch(config)# no queue-monitor length global-buffer
switch(config)#

queue-monitor length log

The queue-monitor length log command enables logging of queue-length over-threshold events when LANZ is enabled on the switch (see queue-monitor length (global configuration mode)). When logging is enabled, a log message is generated each time one or more queues on an interface exceed the upper threshold value for that interface (see queue-monitor length threshold (Arad/Jericho/Qumran)). Once an interface is over threshold, additional messages are generated at a maximum rate of one per interval as long as the queue length remains above the lower threshold for that interface. No syslog message is generated when queue length drops back under threshold.

Logging is disabled by default.

Log messages do not include queue length information. To view queue length information, use the show queue-monitor length command.

The queue-monitor length log command with an interval value of 0 disables event logging.

Command Mode

Global Configuration

Command Syntax

queue-monitor length log interval

Parameters

interval minimum interval in seconds between logged messages from a single interface.

0 queue-length logging is disabled on the switch (the default setting).
1 to 65535 minimum logging interval (in seconds).

Examples

This command enables over-threshold logging with a minimum interval of 10 seconds between messages for a given interface.
```
switch(config)# queue-monitor length log 10
```
This command disables queue-length over-threshold logging on the switch.
```
switch(config)# queue-monitor length log 0
```

This is an example of a queue-length log message.

Oct 27 12:48:22 switch QUEUE_monitor-6-LENGTH_OVER_THRESHOLD: Interface
Ethernet6 queue length is over threshold of 512, current length is 1024.

queue-monitor length mirror

The queue-monitor length mirror command enables LANZ mirroring. As a result, the switch is configured to automatically send congested traffic to either the CPU or an Ethernet egress interface destination, once a queue threshold is crossed. To set the destination for the mirrored traffic, use the queue-monitor length mirror destination command.

Command Mode

Global Configuration

Command Syntax

queue-monitor length mirror

Examples

This command enables LANZ traffic sampling.

switch(config)# queue-monitor length mirror
switch(config)#

This command disables LANZ traffic sampling.

switch(config)# no queue-monitor length mirror
switch(config)#

queue-monitor length mirror destination

The queue-monitor length mirror destination command results in automatically sending traffic experiencing congestion to either the CPU or an Ethernet egress interface destination, once a queue threshold is crossed. Before using this command, first enable LANZ mirroring through the command queue-monitor length mirror.

Command Mode

Global Configuration

Command Syntax

queue-monitor length mirror destination cpu | ports

Parameter

ports any combination of Ethernet ports 1 through 24.

Examples

This command configures LANZ traffic sampling for a CPU interface mirror destination.
```
switch(config)# queue-monitor length mirror destination cpu
switch(config)#
```
This command configures LANZ traffic sampling for an Ethernet interface mirror destination for ports 3, 11, and 15 through 20.
```
switch(config)# queue-monitor length mirror destination Ethernet 3,11,15-20
switch(config)#
```

queue-monitor length notifying

The queue-monitor length notifying command enables Notifying Mode on Arad and Jericho switches. By default, LANZ operates in Polling Mode on Arad and Jericho switches. On all other switches, LANZ operates only in Notifying Mode.

When Notifying Mode is enabled, the switch provides detailed congestion information including Start, Update, and End events, rather than only polling the most congested queue in each ASIC. Notifying Mode uses both upper and lower threshold values. Both can be set with the queue-monitor length thresholds command. While a queue is congested, the maximum queue size is updated every five seconds by default; this interval can be configured using the queue-monitor length update-interval command.

The no queue-monitor length notifying and default queue-monitor length notifying commands reset LANZ to the default Polling Mode.

Command Mode

Global Configuration

Command Syntax

queue-monitor length notifying

no queue-monitor length notifying

default queue-monitor length notifying

Guidelines

Polling mode is available only on Arad and Jericho platform switches.
On Jericho platforms, LANZ will revert to Polling Mode if there are not enough counter resources to operate in Notifying Mode.
On Arad platforms, Notifying Mode is incompatible with SSO. Enabling SSO while Notifying Mode is enabled will cause LANZ to revert to Polling Mode.
On Arad platforms, Notifying Mode is not available for CPU queues. Use Polling Mode when monitoring congestion on CPU queues on Arad switches.
If the switch is rebooted while Notifying Mode is enabled, queue threshold values may be lost.

Examples

This command enables Notifying Mode on an Arad or Jericho switch.

switch(config)# queue-monitor length notifying
switch(config)#

This command disables Notifying Mode on an Arad or Jericho switch, returning LANZ to the default Polling Mode.
```
switch(config)# no queue-monitor length notifying
switch(config)#
```

queue-monitor length thresholds

The queue-monitor length thresholds command sets both upper and lower queue length thresholds to define “congested” on the command-mode interface for purposes of LANZ reporting. If LANZ is enabled (see queue-monitor length (global configuration mode)), an over-threshold event is generated when one or more queues on the interface exceed the upper threshold, and over-threshold events continue to be generated until all queue lengths on the interface drop below the lower threshold. (To log these events, use the queue-monitor length log command.)

Entering the no queue-monitor length command in interface configuration mode disables LANZ on the interface. Entering either the queue-monitor length command or the default queue-monitor length command in interface configuration mode enables LANZ on the interface by removing the no queue-monitor length command from the configuration.

The no queue-monitor length thresholds and default queue-monitor length thresholds commands in interface configuration mode both erase custom queue length threshold settings for the interface.

Command Mode

Interface-Ethernet Configuration

Command Syntax

queue-monitor length thresholds upper_limit lower_limit

no queue-monitor length

default queue-monitor length

Parameters

upper_limit queue length in segments that triggers an over-threshold event. Must be higher than lower_limit. The minimum value is 2. The maximum is the largest number of segments which can be queued before packets are dropped, and varies based on factors including flow control state and private buffer settings. Default setting is 512.
lower_limit lower queue length threshold in segments. When logging is enabled, an over-threshold interface continues generating over-threshold events until all its queues drop back below this length. Must be lower than upper_limit. Values range from 1 to 4806. Default setting is 256.

Guidelines

Queue lengths are measured in 480-byte segments on FM6000 switches, in 208-byte segments on Trident II and Tomahawk switches, in 256-byte segments on Trident 3 switches, and in bytes on Arad and Jericho switches. Default thresholds vary by platform. Both upper and lower thresholds are configurable.

Examples

These commands set the upper and lower queue-length thresholds on interface ethernet 5 to 300 segments and 200 segments.

switch(config)# interface ethernet 5
switch(config-if-Et5)# queue-monitor length thresholds 300 200
switch(config-if-Et5)#

These commands reset the upper and lower queue-length thresholds on interface ethernet 5 to their default values.

switch(config)# interface ethernet 5
switch(config-if-Et5)# default queue-monitor length thresholds
switch(config-if-Et5)#

queue-monitor length threshold (Arad/Jericho/Qumran)

The queue-monitor length threshold command sets the upper queue-length threshold on Arad, Jericho, and Qumran platforms to define “congested” on the command-mode interface for purposes of LANZ reporting. If LANZ is enabled (see queue-monitor length (global configuration mode)), an over-threshold event is generated when one or more queues on the interface exceed the upper threshold, and over-threshold events continue to be generated until all queue lengths on the interface drop below the lower threshold. (To log these events, use the queue-monitor length log command.)

Entering the no queue-monitor length command in interface configuration mode disables LANZ on the interface. Entering either the queue-monitor length threshold command or the default queue-monitor length threshold command enables LANZ on the interface by removing the no queue-monitor length command from the configuration.

The no queue-monitor length threshold and default queue-monitor length threshold commands erase custom queue length threshold settings for the interface.

Command Mode

Interface-Ethernet Configuration

Command Syntax

queue-monitor length threshold upper_limit

no queue-monitor length

default queue-monitor length

Parameters

upper_limit is the queue length in bytes that triggers an over-threshold event. Values range from 40962 to 52428800 bytes. Default setting is 52428800.

Guidelines

On Arad, Jericho, and Qumran platforms, the queue length is measured in bytes. Only the upper threshold is configurable using this command, and it is set at a default value of 52428800 bytes. Both upper and lower thresholds can be set using the queue-monitor length thresholds command.

Examples

These commands set the upper queue-length threshold on interface ethernet 3/30 to 40000000 bytes.

switch(config)# interface ethernet 3/30
switch(config-if-Et3/30)# queue-monitor length threshold 40000000
switch(config-if-Et3/30)#

These commands reset the upper queue-length threshold on interface ethernet 3/30 to its default value of 52428800 bytes.

switch(config)# interface ethernet 3/30
switch(config-if-Et3/30)# default queue-monitor length threshold
switch(config-if-Et3/30)#

queue-monitor length update-interval

The queue-monitor length update-interval command sets the interval between congestion updates when LANZ is in Notifying Mode.

The no queue-monitor length update-interval and default queue-monitor length update-interval commands reset the update interval to its default value of 5000000 (5 seconds).

Command Mode

Global Configuration

Command Syntax

queue-monitor length update-interval interval

no queue-monitor length

default queue-monitor length

Parameters

interval is the time in microseconds between congestion updates. Values range from 80-10000000; default setting is 5000000 (5 seconds).

Examples

This command sets the time between congestion updates to 10 seconds.

switch(config)# queue-monitor length update-interval 10000000
switch(config)#

This command resets the time between congestion updates to its default value of 5 seconds.
```
switch(config)# default queue-monitor length update-interval
switch(config)#
```

queue-monitor streaming

The queue-monitor streaming command places the switch in queue-monitor-streaming configuration mode. Queue-monitor-streaming configuration mode is not a group change mode; running-config is changed immediately upon command entry. The exit command does not affect running-config.

To enable LANZ data streaming on the switch, use the no show queue-monitor streaming clients command.

The exit command returns the switch to global configuration mode.

Command Mode

Global Configuration

Command Syntax

queue-monitor streaming

Commands Available in queue-monitor streaming Configuration Mode

max-connections
show queue-monitor streaming clients

Example

This command places the switch in the queue-monitor streaming configuration mode.

switch(config)# queue-monitor streaming
switch(config-qm-streaming)#

show queue-monitor length

The show queue-monitor length command displays a report of recent over-threshold events for all interfaces, limited to the last 1000 records, with the newest events listed first.

LANZ must be enabled to use this command (see queue-monitor length (global configuration mode)). If LANZ is disabled, the command displays “queue-monitor is disabled.”

To limit the output to a specified number of seconds and/or records, use the show queue-monitor length limit command.

Command Mode

EXEC

Command Syntax

show queue-monitor length

Examples

This command displays the last 1000 LANZ records on an Arad or Jericho platform switch in Polling Mode.

switch> show queue-monitor length
Report generated at 2017-03-10 16:04:28
E-End, S-Start, P-Polling, TC-Traffic Class
* Max queue length during period of congestion
Type       Time                    Intf(TC)      Queue      Duration    Ingress
                                                 Length                 Port-set
                                                 (bytes)    (usecs)
---------- ----------------------- ------------- ---------- ----------- --------
P          0:00:04.81587 ago       Et15(3)       36126720    4030092     Et1-24
switch>

This command displays the last 1000 LANZ records on an Arad or Jericho platform switch in Notifying Mode.

switch> show queue-monitor length
Report generated at 2017-03-10 16:08:58
E-End, S-Start, P-Polling, TC-Traffic Class
* Max queue length during period of congestion
Type       Time                    Intf(TC)       Queue      Duration    Ingress
                                                  Length                 Port-set
                                                  (bytes)    (usecs)
---------- ----------------------- -------------- ---------- ---------  --------
E          0:00:03.11739 ago       Et24(2)        36126720*  20700629    Et9-20,54/1-4
U          0:00:04.01513 ago       Et24(2)        36126720    N/A        Et9-20,54/1-4
U          0:00:08.94918 ago       Et24(2)        36126720    N/A        Et9-20,54/1-4
U          0:00:13.88323 ago       Et24(2)        36126720    N/A        Et9-20,54/1-4
U          0:00:18.81728 ago       Et24(2)        36126720    N/A        Et9-20,54/1-4
U          0:00:23.74758 ago       Et24(2)        36126720    N/A        Et9-20,54/1-4
S          0:00:23.81802 ago       Et24(2)        36126720    N/A        Et9-20,54/1-4
switch>

This command displays the last 1000 LANZ records on an FM6000, Trident II, Trident 3, or Tomahawk platform switch.

switch> show queue-monitor length
Report generated at 2017-03-10 14:57:12
E-End, U-Update, S-Start, TC-Traffic Class
Segment size for E, U and S congestion records is 208 bytes
* Max queue length during period of congestion
+ Period of congestion exceeded counter
-----------------------------------------------------------------------------------------
Type    Time               Interface      Congestion     Queue      Time of Max   Fabric
                           (TC)           duration       length     Queue length  Peer
                                          (usecs)        (segments) relative to
                                                                     congestion
                                                                     start
                                                                     (usecs)
-----------------------------------------------------------------------------------------
 E   0:08:04.45352 ago     Et23/3(13)     22704753       5743*      0
 U   0:08:07.10807 ago     Et23/3(13)     N/A            5742       N/A
 U   0:08:12.10808 ago     Et23/3(13)     N/A            5742       N/A
 U   0:08:17.10809 ago     Et23/3(13)     N/A            5742       N/A
 U   0:08:22.10810 ago     Et23/3(13)     N/A            5742       N/A
 U   0:08:27.10810 ago     Et23/3(13)     N/A            5742       N/A
 U   0:08:27.11311 ago     Et23/3(13)     N/A            5741       N/A
 U   0:08:27.11811 ago     Et23/3(13)     N/A            5742       N/A
 U   0:08:27.12312 ago     Et23/3(13)     N/A            5742       N/A
 U   0:08:27.12812 ago     Et23/3(13)     N/A            5743       N/A
 U   0:08:27.13315 ago     Et23/3(13)     N/A            5743       N/A
 U   0:08:27.13816 ago     Et23/3(13)     N/A            5743       N/A
 U   0:08:27.14319 ago     Et23/3(13)     N/A            5742       N/A
 U   0:08:27.14822 ago     Et23/3(13)     N/A            5743       N/A
 U   0:08:27.15322 ago     Et23/3(13)     N/A            5742       N/A
 S   0:08:27.15828 ago     Et23/3(13)     N/A            2064       N/A
switch>

show queue-monitor length all

The show queue-monitor length all command displays all available over-threshold event records on the switch including global buffer information, with the most recent events listed first.

LANZ must be enabled to use this command (see queue-monitor length (global configuration mode)). If LANZ is disabled, the command displays “queue-monitor is disabled.”

Command Mode

EXEC

Command Syntax

show queue-monitor length all

Guidelines

This command is available on FM6000 platform switches.

Example

This command displays all available LANZ records from the switch.

switch> show queue-monitor length all

Report generated at 2013-04-01 13:23:13
E-End, U-Update, S-Start, TC-Traffic Class
GH-High, GU-Update, GL-Low
Segment size for E, U and S congestion records is 480 bytes
Segment size for GL, GU and GH congestion records is 160 bytes
* Max queue length during period of congestion
+ Period of congestion exceeded counter
------------------------------------------------------------------------------
Type    Time                   Intf    Congestion     Queue       Time of Max
                               (TC)    duration       length      Queue length
                                       (usecs)        (segments)  relative to
                                                                  congestion
                                                                  start
                                                                  (usecs)
------------------------------------------------------------------------------
E  0:00:00.07567 ago         Et22(7)   >=71 mins      20*         30us
GU 0:00:00.15325 ago         N/A       N/A            5695        N/A           
U  0:00:00.19859 ago         Et4(1)    N/A            5693        N/A           
GU 0:00:00.95330 ago         N/A       N/A            5696        N/A           
U  0:00:00.99859 ago         Et4(1)    N/A            5695        N/A 
E  0:00:01.28821 ago         Et44(1)   9672us         2502*       7294us
S  0:00:01.17591 ago         Et22(7)   N/A            26          N/A
U  0:00:03.08248 ago         Et44(1)   N/A            50          N/A
S  12days,8:56:44.07567 ago  Et44(1)   N/A            20          N/A
switch>

show queue-monitor length cpu

The show queue-monitor length cpu command displays LANZ data for CPU ports on the switch. On Trident II and Tomahawk platforms, the “Interface” column identifies the CPU port by its card slot and chip index.

LANZ must be enabled to use this command (see queue-monitor length (global configuration mode)). If LANZ is disabled, the command displays “queue-monitor is disabled.”

Command Mode

EXEC

Command Syntax

show queue-monitor length cpu

This command displays LANZ data for CPU ports on a Trident II or Tomahawk switch.

switch> show queue-monitor length cpu
Report generated at 2017-03-10 15:24:11
E-End, U-Update, S-Start, TC-Traffic Class
Segment size for E, U and S congestion records is 208 bytes
* Max queue length during period of congestion
+ Period of congestion exceeded counter
----------------------------------------------------------------------------------------
Type    Time             Interface      Congestion     Queue      Time of Max    Fabric
                         (TC)           duration       length     Queue length   Peer
                                        (usecs)        (segments) relative to
                                                                  congestion
                                                                  start
                                                                  (usecs)
----------------------------------------------------------------------------------------
 E   0:02:24.19153 ago    Cpu0/0(39)     16669811       271*       0
 U   0:02:25.81126 ago    Cpu0/0(39)     N/A            270        N/A
 U   0:02:30.81126 ago    Cpu0/0(39)     N/A            270        N/A
 U   0:02:35.81128 ago    Cpu0/0(39)     N/A            270        N/A
 U   0:02:40.81129 ago    Cpu0/0(39)     N/A            270        N/A
 U   0:02:40.81630 ago    Cpu0/0(39)     N/A            270        N/A
 U   0:02:40.82130 ago    Cpu0/0(39)     N/A            270        N/A
 U   0:02:40.82631 ago    Cpu0/0(39)     N/A            270        N/A
 U   0:02:40.83132 ago    Cpu0/0(39)     N/A            270        N/A
 U   0:02:40.83632 ago    Cpu0/0(39)     N/A            270        N/A
 U   0:02:40.84132 ago    Cpu0/0(39)     N/A            270        N/A
 U   0:02:40.84633 ago    Cpu0/0(39)     N/A            270        N/A
 U   0:02:40.85133 ago    Cpu0/0(39)     N/A            270        N/A
 U   0:02:40.85634 ago    Cpu0/0(39)     N/A            270        N/A
 S   0:02:40.86134 ago    Cpu0/0(39)     N/A            271        N/A

This command displays LANZ data for CPU ports on an FM6000 switch.

switch> show queue-monitor length cpu
Report generated at 2017-03-10 15:17:57
E-End, U-Update, S-Start, TC-Traffic Class
GH-High, GU-Update, GL-Low
Segment size for E, U and S congestion records is 480 bytes
Segment size for GL, GU and GH congestion records is 160 bytes
* Max queue length during period of congestion
+ Period of congestion exceeded counter
-------------------------------------------------------------------------------
Type    Time                   Intf    Congestion     Queue       Time of Max
                               (TC)    duration       length      Queue length
                                       (usecs)        (segments)  relative to
                                                                  congestion
                                                                  start
                                                                  (usecs)
-------------------------------------------------------------------------------
 E   0:04:41.17456 ago         Cpu(11)   29            1024*       0
 S   0:04:41.17459 ago         Cpu(11)   N/A           1024        N/A
 E   0:04:41.17463 ago         Cpu(11)   15926108      206*        33872
 U   0:04:42.09651 ago         Cpu(11)   N/A           205         N/A
 U   0:04:47.09710 ago         Cpu(11)   N/A           205         N/A
 U   0:04:52.09769 ago         Cpu(11)   N/A           205         N/A
 U   0:04:57.09826 ago         Cpu(11)   N/A           205         N/A

This command displays LANZ data for CPU ports on an Arad or Jericho switch in Polling Mode.

switch> show queue-monitor length cpu
Report generated at 2017-03-10 16:04:28
E-End, S-Start, P-Polling, TC-Traffic Class
* Max queue length during period of congestion
Type  Time              Intf(TC)               Queue      Duration   Ingress
                                               Length                Port-set
                                               (bytes)    (usecs)
---- ------------------ ---------------------- ---------- ---------- --------
P    0:00:31.48474 ago  CoppSystemL2Ucast(5)    10486080  20184965    Et1-24

This command displays LANZ data for CPU ports on an Arad or Jericho switch in Notifying Mode.

switch> show queue-monitor length cpu
Report generated at 2017-03-10 16:08:58
E-End, S-Start, P-Polling, TC-Traffic Class
* Max queue length during period of congestion
Type  Time               Intf(TC)                Queue       Duration   Ingress
                                                 Length                 Port-set
                                                 (bytes)     (usecs)
----- ------------------ ----------------------- ----------- ---------- --------
E     0:00:03.11739 ago    CoppSystemL2Ucast(5)   10485760*   20700629   Et1-24
U     0:00:04.01513 ago    CoppSystemL2Ucast(5)   10485760     N/A       Et1-24
U     0:00:08.94918 ago    CoppSystemL2Ucast(5)   10485760     N/A       Et1-24
U     0:00:13.88323 ago    CoppSystemL2Ucast(5)   10485760     N/A       Et1-24
U     0:00:18.81728 ago    CoppSystemL2Ucast(5)   10485760     N/A       Et1-24
U     0:00:23.74758 ago    CoppSystemL2Ucast(5)   10485760     N/A       Et1-24
S     0:00:23.81802 ago    CoppSystemL2Ucast(5)   10485760     N/A       Et1-24

show queue-monitor length csv

The show queue-monitor length csv command displays LANZ records in Comma-Separated Value (CSV) format with the oldest samples displayed first.

LANZ must be enabled to use this command (see queue-monitor length (global configuration mode)). If LANZ is disabled, the command displays “queue-monitor is disabled.”

Command Mode

EXEC

Command Syntax

show queue-monitor length csv

Example

This command displays LANZ records in CSV format.

switch> show queue-monitor length csv

Report generated at 2016-02-09 22:57:50
Type,Time,Interface,Duration(usecs),Queue-Length,Time-Of-Max-Queue(usecs),Laten
cy(usecs),Tx-Drops
 S,2016-02-09 22:53:05.70596,Et29(11),N/A,2590,N/A,60.088,0
 U,2016-02-09 22:53:05.71098,Et29(11),N/A,2590,N/A,60.088,216555
 U,2016-02-09 22:53:05.71600,Et29(11),N/A,2590,N/A,60.088,215546
switch>

show queue-monitor length drops

The show queue-monitor length drops command displays a report of cumulative transmission drop totals for a range of interfaces or for all interfaces. Output can be limited to a specified number of seconds or records. The most recent events are listed first. By default, the command displays data for all interfaces, limited to the last 1000 records. Newest events are listed first.

LANZ must be enabled to use this command (see queue-monitor length (global configuration mode)). If LANZ is disabled, the command displays “queue-monitor is disabled.”

Command Mode

EXEC

Command Syntax

show queue-monitor length [INTERFACES][FACTOR] drops

Parameters

INTERFACES interface type and number for report. Values include:
- no parameter displays information for all interfaces.
- ethernet e-range e-range formats include a number, number range, or comma-delimited list of numbers and ranges.
FACTOR limiting parameter for report. Values include:
- no parameter displays the last 1000 records.
- limit number samples displays the last number records.
- limit number seconds displays all records generated during the last number seconds. Value of number ranges from 1 to 1000000.

Guidelines

This command is available on FM6000, Trident II, Trident 3, and Tomahawk platform switches.

Examples

This command displays the last 10 records of transmission drop data on an FM6000 switch.

switch> show queue-monitor length limit 10 samples drops 
Report generated at 2017-03-10 15:25:29
Time                                    Interface      TX Drops
-----------------------------------------------------------------
0:12:13.34425 ago                       Cpu            419
0:12:13.34428 ago                       Cpu            371
0:12:13.34433 ago                       Cpu            9913826
0:12:14.26621 ago                       Cpu            53775812
0:12:19.26680 ago                       Cpu            53775740
0:12:24.26738 ago                       Cpu            53775714
0:12:29.26796 ago                       Cpu            1073
0:12:29.26806 ago                       Cpu            1068
0:12:29.26816 ago                       Cpu            1074
0:12:29.26825 ago                       Cpu            1071

This command displays the last 10 records of transmission drop data on a Trident II or Tomahawk switch.

switch> show queue-monitor length limit 10 samples drops 

Report generated at 2017-03-10 15:25:34
Time                                    Interface(TC)  TX Drops
-----------------------------------------------------------------
0:03:47.06553 ago                       Cpu0/0(39)     17419818
0:03:48.68527 ago                       Cpu0/0(39)     53773707
0:03:53.68527 ago                       Cpu0/0(39)     53773770
0:03:58.68528 ago                       Cpu0/0(39)     53773763
0:04:03.68529 ago                       Cpu0/0(39)     53878
0:04:03.69030 ago                       Cpu0/0(39)     53777
0:04:03.69530 ago                       Cpu0/0(39)     53917
0:04:03.70031 ago                       Cpu0/0(39)     53880
0:04:03.70532 ago                       Cpu0/0(39)     53786
0:04:03.71032 ago                       Cpu0/0(39)     53782
switch>

show queue-monitor length ethernet

The show queue-monitor length ethernet command displays a report of recent over-threshold events for a range of interfaces, with the newest events listed first.

LANZ must be enabled to use this command (see queue-monitor length (global configuration mode)). If LANZ is disabled, the command displays “queue-monitor is disabled.”

Command Mode

EXEC

Command Syntax

show queue-monitor length ethernet e-range

Parameters

e-range the range of interfaces to be included in the report; formats include a number, number range, or comma-delimited list of numbers and ranges

Examples

This command displays the last 1000 records for interface ethernet 9 on an FM6000 platform switch.

switch> show queue-monitor length ethernet 9
Report generated at 2017-03-10 15:33:35
E-End, U-Update, S-Start, TC-Traffic Class
GH-High, GU-Update, GL-Low
Segment size for E, U and S congestion records is 480 bytes
Segment size for GL, GU and GH congestion records is 160 bytes
* Max queue length during period of congestion
+ Period of congestion exceeded counter
-------------------------------------------------------------------------------
Type    Time                   Intf    Congestion     Queue       Time of Max
                               (TC)    duration       length      Queue length
                                       (usecs)        (segments)  relative to
                                                                  congestion
                                                                  start
                                                                  (usecs)
-------------------------------------------------------------------------------
 E   0:00:24.82515 ago         Et9(1)    22737967      5623*       26651
 U   0:00:27.55841 ago         Et9(1)    N/A           5620        N/A
 U   0:00:32.55899 ago         Et9(1)    N/A           5620        N/A
 U   0:00:37.55957 ago         Et9(1)    N/A           5621        N/A
 U   0:00:42.56015 ago         Et9(1)    N/A           5621        N/A
 U   0:00:47.56073 ago         Et9(1)    N/A           5621        N/A
 U   0:00:47.56083 ago         Et9(1)    N/A           5620        N/A
 U   0:00:47.56093 ago         Et9(1)    N/A           5620        N/A
 U   0:00:47.56103 ago         Et9(1)    N/A           5620        N/A
 U   0:00:47.56113 ago         Et9(1)    N/A           5620        N/A
switch>

This command displays the last 1000 records for interface ethernet 23/3 on a Trident II or Tomahawk platform switch.

switch> show queue-monitor length Ethernet 23/3
Report generated at 2017-03-10 15:38:01
E-End, U-Update, S-Start, TC-Traffic Class
Segment size for E, U and S congestion records is 208 bytes
* Max queue length during period of congestion
+ Period of congestion exceeded counter
-----------------------------------------------------------------------------------------------
Type    Time                   Interface      Congestion     Queue      Time of Max    Fabric
                               (TC)           duration       length     Queue length   Peer
                                              (usecs)        (segments) relative to
                                                                        congestion
                                                                        start
                                                                        (usecs)
-----------------------------------------------------------------------------------------------
 E   0:00:29.49376 ago         Et23/3(1)      22388908       7879*      365268
 U   0:00:31.83332 ago         Et23/3(1)      N/A            7877       N/A
 U   0:00:36.83288 ago         Et23/3(1)      N/A            7877       N/A
 U   0:00:41.83289 ago         Et23/3(1)      N/A            7877       N/A
 U   0:00:46.83289 ago         Et23/3(1)      N/A            7877       N/A
 U   0:00:51.83260 ago         Et23/3(1)      N/A            7877       N/A
 U   0:00:51.83760 ago         Et23/3(1)      N/A            7877       N/A
 U   0:00:51.84261 ago         Et23/3(1)      N/A            7878       N/A
 U   0:00:51.84762 ago         Et23/3(1)      N/A            7877       N/A
 U   0:00:51.85263 ago         Et23/3(1)      N/A            7877       N/A
 U   0:00:51.85763 ago         Et23/3(1)      N/A            7877       N/A
 U   0:00:51.86264 ago         Et23/3(1)      N/A            7877       N/A
 U   0:00:51.86765 ago         Et23/3(1)      N/A            7878       N/A
 U   0:00:51.87265 ago         Et23/3(1)      N/A            7877       N/A
 U   0:00:51.87766 ago         Et23/3(1)      N/A            7877       N/A
 S   0:00:51.88267 ago         Et23/3(1)      N/A            1710       N/A
switch>

This command displays the last 1000 records for interface ethernet 24 on an Arad or Jericho platform switch in Polling Mode.

switch> show queue-monitor length Ethernet 24
Report generated at 2017-03-10 16:04:28
E-End, S-Start, P-Polling, TC-Traffic Class
* Max queue length during period of congestion
Type       Time                    Intf(TC)        Queue          Duration    Ingress
                                                   Length                     Port-set
                                                   (bytes)        (usecs)
---------- ----------------------- --------------- -------------- ----------- --------
P          0:00:04.81587 ago       Et24(3)         36126720       4030092     Et1-24
switch>

This command displays the last 1000 records for interface ethernet 24 on an Arad or Jericho platform switch in Notifying Mode.

switch> show queue-monitor length Ethernet 24
Report generated at 2017-03-10 16:08:58
E-End, S-Start, P-Polling, TC-Traffic Class
* Max queue length during period of congestion
Type       Time                    Intf(TC)     Queue           Duration    Ingress
                                                Length                      Port-set
                                                (bytes)         (usecs)
---------- ----------------------- ----------- --------------- -------------- --------
E          0:00:03.11739 ago       Et24(2)      36126720*       20700629    Et9-20,54/1-4
U          0:00:04.01513 ago       Et24(2)      36126720        N/A         Et9-20,54/1-4
U          0:00:08.94918 ago       Et24(2)      36126720        N/A         Et9-20,54/1-4
U          0:00:13.88323 ago       Et24(2)      36126720        N/A         Et9-20,54/1-4
U          0:00:18.81728 ago       Et24(2)      36126720        N/A         Et9-20,54/1-4
U          0:00:23.74758 ago       Et24(2)      36126720        N/A         Et9-20,54/1-4
S          0:00:23.81802 ago       Et24(2)      36126720        N/A         Et9-20,54/1-4
switch>

Note: The non-sequential listing of ingress ports shown here is specific to Jericho switches; interfaces on Arad switches are always displayed sequentially.

show queue-monitor length global-buffer

The show queue-monitor length global-buffercommand displays a report of recent high usage, low usage and update events for the global buffer. Newest events are listed first.

LANZ must be enabled to use this command (see queue-monitor length (global configuration mode)). If LANZ is disabled, the command displays “queue-monitor is disabled.”

Command Mode

EXEC

Command Syntax

show queue-monitor length global-buffer

Guidelines

This command is available on FM6000 platform switches.

Example

This command displays the global buffer event records for the switch.

switch> show queue-monitor length global buffer
Report generated at 2013-04-01 14:30:07
GH-High, GU-Update, GL-Low
Segment size = 160 bytes
* Max buffer usage during period of congestion
-------------------------------------------------------------------------------
-
Type        Time                       Buffer      Congestion     Time of Max
                                       usage       duration       buffer usage
                                       (segments)  (usecs)        relative to
                                                                  GH (usecs)
-------------------------------------------------------------------------------
-
GE 0:04:04.49547 ago                   3121*       20786516       3418
GU 0:04:05.27967 ago                   3120        N/A            N/A
GU 0:04:10.27968 ago                   3120        N/A            N/A
GU 0:04:25.28163 ago                   3118        N/A            N/A
GU 0:04:25.28173 ago                   3118        N/A            N/A
GU 0:04:25.28182 ago                   2963        N/A            N/A
GU 0:04:25.28192 ago                   1916        N/A            N/A
GS 0:04:25.28201 ago                   913         N/A            N/A
switch>

show queue-monitor length limit

The show queue-monitor length limit command displays a report of recent over-threshold events for a range of interfaces or for all interfaces, limited by a specified number of records.

LANZ must be enabled to use this command (see queue-monitor length (global configuration mode)). If LANZ is disabled, the command displays “queue-monitor is disabled.”

Command Mode

EXEC

Command Syntax

show queue-monitor length limit [INTERFACES] number

Parameters

INTERFACES interface type and number for report. Values include:
- no parameter displays information for all interfaces.
- ethernet e-range e-range formats include a number, number range, or comma-delimited list of numbers and ranges.
number number of records to display. Values range from 1 to 1000000.

Example

This command displays the last 100 records for interface ethernet 6 through 8.

switch># show queue-monitor length ethernet 6-8 limit 100 samples
Report generated at 2010-01-01 12:56:13
Time                        Interface   Queue length (segments, 1 to 512 bytes)
----------------------------------------------------------------------------
0:00:07.43393 ago           Et6         1049
0:00:39.22856 ago           Et7         2039
1 day, 4:33:23.12345 ago    Et6         1077
switch>

show queue-monitor length statistics

The show queue-monitor length statistics command displays LANZ statistics for all interfaces, showing the traffic class and number of recorded congestion events for each interface.

LANZ must be enabled to use this command (see queue-monitor length (global configuration mode)). If LANZ is disabled, the command displays “queue-monitor is disabled.”

Command Mode

EXEC

Command Syntax

show queue-monitor length statistics

Example

This command displays LANZ statistics for all interfaces on the switch.

switch> show queue-monitor length statistics

Report generated at 2016-02-09 22:59:56
Interface      Traffic Class  Count
---------------------------------------------------------
Et29            11             1

show queue-monitor length status

The show queue-monitor length status command displays the current LANZ configuration for the switch and for each interface. On certain platforms, the status of global buffer monitoring and per-linecard LANZ mode are displayed.

Command Mode

EXEC Global Configuration

Command Syntax

show queue-monitor length status

Guidelines

On FM6000 platform switches, this command includes status information about global buffer monitoring.

On Arad and Jericho based linecards, if LANZ is globally enabled (using the queue-monitor length (global configuration mode) command), the command displays the monitoring mode per-linecard.

On Arad and Jericho switches, even when all linecards are configured in Notifying Mode (using the queue-monitor length notifying command), some linecards may still run LANZ in Polling Mode under the following circumstances:

On Arad-based linecards, LANZ falls back to Polling Mode when SSO redundancy mode is configured on the card (here, the mode is shown as “polling due to SSO configured”).
- On Jericho-based linecards, LANZ may run in Polling Mode when many features that use the switch’s statistic capabilities have been configured (here, the mode is shown as “polling due to counters exhausted”).

Examples

This command displays the current LANZ configuration on an FM6000 device.

switch# show queue-monitor length status
queue-monitor length enabled
queue-monitor length packet sampling is disabled
queue-monitor length update interval in micro seconds:  5000000
Global Buffer monitoring
------------------------
Global buffer monitoring is enabled
Segment size in bytes :   160
Total buffers in segments : 49152
High threshold : 16862
Low threshold :  6745


Per-Interface Queue Length monitoring
-------------------------------------
Queue length monitoring is enabled
Segment size in bytes :   480
Maximum queue length in segments :  5621
Port thresholds in segments:
Port     High threshold  Low threshold   Mirroring Enabled
Cpu                 512            256                True
Et1                 512            256                True
Et2                 512            256                True
Et3                 512            256                True
Et4                 512            256                True
Et5                 512            256                True
Et6                 512            256                True
Et7                 512            256                True


switch#

This command displays the current LANZ configuration on a Trident II or Tomahawk device.

switch# show queue-monitor length status
queue-monitor length enabled
queue-monitor length packet sampling is disabled
queue-monitor length update interval in micro seconds:  5000000
Per-Interface Queue Length monitoring
-------------------------------------
Queue length monitoring is enabled
Segment size in bytes :   208
Maximum queue length in segments : 16382
Port thresholds in segments:
Port     High threshold  Low threshold 
Cpu                 512            256
Et1/1               512            256
Et1/2               512            256
Et1/3               512            256
Et1/4               512            256
Et2/1               512            256
Et2/2               512            256
Et2/3               512            256

switch#

This command displays the current LANZ configuration on an Arad or Jericho device.

switch# show queue-monitor length status
queue-monitor length enabled
queue-monitor length packet sampling is disabled
queue-monitor length update interval in micro seconds: 5000000
Per-Interface Queue Length monitoring
-------------------------------------
Queue length monitoring is enabled
Queue length monitoring mode is notifying
Queue length monitoring status is:
Linecard3 polling due to SSO configured
Linecard4 polling due to SSO configured
Linecard5 polling due to SSO configured
Linecard6 polling due to SSO configured
Maximum queue length in bytes : 524288000
Port thresholds in bytes:
Port     High threshold    Low threshold     Warnings
Cpu               65536          32768
Et3/1/1          5242880        2621440
Et3/1/2          5242880        2621440
Et3/1/3          5242880        2621440
Et3/1/4          5242880        2621440
Et3/1/5          5242880        2621440
Et3/1/6          5242880        2621440
Et3/1/7          5242880        2621440
Et3/1/8          5242880        2621440

This command displays the current LANZ configuration on an Arad or Jericho device with LANZ disabled globally. Per-linecard LANZ mode status is not displayed.

switch(config)# show queue-monitor length status
queue-monitor length disabled
queue-monitor length packet sampling is disabled
queue-monitor length update interval in micro seconds: 5000000
Per-Interface Queue Length monitoring
-------------------------------------
Queue length monitoring is disabled
Queue length monitoring mode is notifying
Maximum queue length in bytes : 524288000
Port thresholds in bytes:
Port     High threshold    Low threshold     Warnings
Cpu               65536          32768
Et3/1/1          5242880        2621440
Et3/1/2          5242880        2621440
Et3/1/3          5242880        2621440
Et3/1/4          5242880        2621440
Et3/1/5          5242880        2621440
Et3/1/6          5242880        2621440
Et3/1/7          5242880        2621440
Et3/1/8          5242880        2621440

show queue-monitor length tx-latency

The show queue-monitor length tx-latency command displays the latency data of recent LANZ events for a range of interfaces or for all interfaces. Output can be limited to a specified number of seconds or records. The most recent events are listed first. By default, the command displays data for all interfaces, limited to the last 1000 records. Newest events are listed first.

LANZ must be enabled to use this command (see queue-monitor length (global configuration mode)). If LANZ is disabled, the command displays “queue-monitor is disabled.”

Command Mode

EXEC

Command Syntax

show queue-monitor length [INTERFACES][FACTOR] tx-latency

Parameters

INTERFACES interface type and number for report. Values include:
- no parameter displays information for all interfaces.
- ethernet e-range e-range formats include a number, number range, or comma-delimited list of numbers and ranges.
FACTOR limiting parameter for report. Values include:
- no parameter displays the last 1000 records.
- limit number samples displays the last number records.
- limit number seconds displays all records generated during the last number seconds. Value of number ranges from 1 to 1000000.

Guidelines

This command is available on FM6000, Trident II, Trident 3, and Tomahawk platform switches.

Example

This command displays transmission latency data for the last 1000 LANZ events on the switch.

switch> show queue-monitor length tx-latency

Report generated at 2017-03-10 15:40:02
Time                          Interface(TC)  Tx-Latency (usecs)
-----------------------------------------------------------------
0:02:29.99222 ago             Et23/3(1)      724.868
0:02:32.33178 ago             Et23/3(1)      724.684
0:02:37.33134 ago             Et23/3(1)      724.684
0:02:42.33135 ago             Et23/3(1)      724.684
0:02:47.33135 ago             Et23/3(1)      724.684
0:02:52.33106 ago             Et23/3(1)      730.985
switch>

show queue-monitor streaming clients

The show queue-monitor streaming clients command displays the number of presently connected clients through LANZ streaming, and also displays their host-names. Ensure that both LANZ and LANZ streaming are enabled in order to use this command.

Command Mode

EXEC

Command Syntax

show queue-monitor streaming clients

Example

This command displays the number of clients connected to LANZ streaming.

switch# show queue-monitor streaming clients
Number of clients connected: 3
--------------------------------
172.20.63.161:6565
172.24.17.58:42
172.38.54.142:333

shutdown (queue-monitor-streaming configuration)

The shutdown command disables the streaming of LANZ data to external clients. The no shutdown command enables LANZ data streaming. Streaming is disabled by default.

Command Mode

Queue-monitor-Streaming Configuration

Command Syntax

shutdown

no shutdown

Example

These commands enable the streaming of LANZ data on the switch.

switch(config)# queue-monitor streaming
switch(config-qm-streaming)# no shutdown
switch(config-qm-streaming)#

tcpdump queue-monitor

The tcpdump queue-monitor command exports congested traffic to a packet capture device or another tool for analysis, or directly to the switch CPU for inspection.

Command Mode

Global Configuration

Command Syntax

Parameters

file output file.
- certificate: certificate file.
  - file: standard file.
  - flash: flash file.
  - sslkey: sslkey file.
  - usb1: usb1 file.
filecount specify the number of output files: 1 to 100.
filter set the filtering expression to select which packets will be dumped.
lookup-names enable reverse DNS lookups.
max-file-size specify the maximum file size by entering 1 to 100 million bytes.
packet-count specify 1 to 10000 packets to capture.
size specify the maximum number of bytes to dump per packet with a size of 1 to 65536 bytes.
verbose enable verbose mode.

Example

This command inspects traffic on the switch.

switch(config)# tcpdump queue-monitor
tcpdump: WARNING: lanz: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on lanz, link-type EN10MB (Ethernet), capture size 65535 bytes
...
0 packets captured
0 packets received by filter
0 packets dropped by kernel
switch(config)#

EOS 4.33.0F User Manual

Latency Analyzer (LANZ)

Introduction to LANZ

LANZ Overview

LANZ monitoring Mechanism

Notifying and Polling Modes

Notifying Mode

Polling Mode

LANZ Logging

LANZ Reporting

LANZ Streaming

Configuring LANZ

Enabling and Disabling LANZ

Examples

Specifying the LANZ Mode on Jericho and Arad Switches

Examples

Configuring LANZ Congestion Thresholds

Setting the Congestion Update Interval

Congestion Thresholds on FM6000, Trident II, Trident 3, and Tomahawk Switches

Examples

Congestion Thresholds on Arad Switches

Example

CPU Port Congestion Thresholds

Examples

Fabric Port Congestion Thresholds

Examples

Setting LANZ Traffic Sampling

Examples

Logging LANZ Congestion events

Viewing LANZ Data

Viewing LANZ Data on Arad Platform Switches

Example

Example

Viewing LANZ Data on FM6000, Trident II, Trident 3, and Tomahawk Platform Switches

Example

Example

Example

Streaming LANZ Data

Enabling and Disabling LANZ Data Streaming

Examples

Configuring Maximum Connections

LANZ Streaming Messages

Configuration Messages

Congestion Messages

Creating the LANZ Client

LANZ Commands

LANZ Commands: Global Configuration

LANZ Commands: Interface Ethernet Configuration Mode

LANZ Commands: Queue-monitor Streaming Configuration Mode

LANZ Display Commands

clear queue-monitor length statistics

max-connections

queue-monitor length (global configuration mode)

queue-monitor length cpu thresholds

queue-monitor length fabric thresholds

queue-monitor length global-buffer log

queue-monitor length global-buffer thresholds

queue-monitor length global-buffer

queue-monitor length log

queue-monitor length mirror

queue-monitor length mirror destination

queue-monitor length notifying

queue-monitor length thresholds

queue-monitor length threshold (Arad/Jericho/Qumran)

queue-monitor length update-interval

queue-monitor streaming

show queue-monitor length

show queue-monitor length all

show queue-monitor length cpu

show queue-monitor length csv

show queue-monitor length drops

show queue-monitor length ethernet

show queue-monitor length global-buffer

show queue-monitor length limit

show queue-monitor length statistics

show queue-monitor length status

show queue-monitor length tx-latency

show queue-monitor streaming clients

shutdown (queue-monitor-streaming configuration)

tcpdump queue-monitor