- Written by Paul Fallon
- Posted on August 28, 2020
- Updated on September 7, 2020
- 5529 Views
For a pair of QSFP100 grouped together on a gearbox, it is possible to enable a 10G or 25G link on the first primary port
- Written by Kewei Shi
- Posted on August 24, 2020
- Updated on July 12, 2023
- 6032 Views
This document describes the configuration and behavior of physical interfaces on the 7368 series switches and
- Written by Tarun Jaswanth LNU
- Posted on August 24, 2020
- Updated on May 7, 2024
- 20682 Views
802.1X is an IEEE standard protocol that prevents unauthorized devices from gaining access to the network.
- Written by Michael (Mike) Fink
- Posted on December 22, 2017
- Updated on September 25, 2023
- 12048 Views
Filtered Mirroring allows certain packets to be selected for mirroring, rather than all packets ingressing or egressing a particular port.
- Written by Francesco Belletti
- Posted on August 20, 2020
- Updated on August 20, 2020
- 5796 Views
This feature adds support for “Enhanced Route Refresh” capability (RFC7313). An enhanced route refresh is,
- Written by Nandan Saha
- Posted on August 24, 2020
- Updated on March 5, 2024
- 9238 Views
The BGP-LS extension allows IGPs (OSPF/IS-IS) link state database information to be injected into BGP. This is typically used in deployments where some external component, (like a controller or Path Computation Engine) can do centralized path computations by learning the entire IGP topology through BGP-LS. The controller can then communicate the computed paths based on the BGP-LS updates to the head end device in the network. The mechanism used by the controller to communicate the computed TE paths is outside the scope of this document. Using BGP-LS instead of an IGP peering with the controller to distribute IGP link state information has the following advantages.
- Written by Srinivasan Koona Lokabiraman
- Posted on August 25, 2020
- Updated on August 25, 2020
- 6130 Views
The BGP graceful restart mechanism has a limitation that the graceful restart time cannot exceed 4095 seconds as per
- Written by Pete Carson
- Posted on August 20, 2020
- Updated on March 7, 2023
- 6055 Views
Virtual ARP (VARP) allows multiple switches to simultaneously route packets from a common IP address in an active
- Written by Vikas Hegde
- Posted on November 22, 2017
- Updated on February 6, 2024
- 12310 Views
Connectivity Monitor is an EOS feature that allows users to monitor their network resources from their Arista switches. The resources being monitored may or may not be Arista devices. Connectivity monitoring is unidirectional in nature.
- Written by Ravil Baizhiyenov
- Posted on September 16, 2019
- Updated on July 12, 2023
- 6928 Views
This document describes the configuration and behavior of physical interfaces on the DCS 7060X4 series switches
- Written by Huong Nguyen
- Posted on November 13, 2019
- Updated on October 12, 2023
- 10859 Views
Support for DHCPv4 (RFC 2131) and DHCPv6 Server (RFC 8415) was added to EOS-4.22.1 and EOS-4.23.0 respectively. EOS DHCP server leverages ISC Kea as backend. The router with DHCP Server enabled acts as a server that allocates and delivers network addresses with desired configuration parameters to its hosts.
- Written by Dragos Maftei
- Posted on August 18, 2020
- Updated on August 19, 2020
- 6390 Views
This feature adds a CLI knob to allow disabling the ENTITY STATE traps entStateOperEnabled &
- Written by Denis Evoy
- Posted on August 20, 2020
- Updated on August 20, 2020
- 10790 Views
In a Service Provider network, a Provider Edge (PE) device learns VPN paths from remote PEs and uses the Route Target
- Written by Leandro Penz
- Posted on August 21, 2020
- Updated on August 21, 2020
- 5267 Views
Dynamic CLI Access VLAN is a command that sets the effective access VLAN in a port without changing the running
- Written by Arup Raton Roy
- Posted on August 24, 2020
- Updated on December 27, 2021
- 6598 Views
This feature enables support for Macro Segmentation Service (MSS) to insert security devices into the traffic path
- Written by Wade Carpenter
- Posted on April 24, 2020
- Updated on December 6, 2023
- 12573 Views
EVPN MPLS VPWS (RFC 8214) provides the ability to forward customer traffic to / from a given attachment circuit (AC) without any MAC lookup / learning. The basic advantage of VPWS over an L2 EVPN is the reduced control plane signalling due to not exchanging MAC address information. In contrast to LDP pseudowires, EVPN MPLS VPWS uses BGP for signalling. Port based and VLAN based services are supported.
- Written by Mitchell Jameson
- Posted on August 24, 2020
- Updated on October 6, 2023
- 6162 Views
Typical Wi Fi networks utilize a single, central Wireless LAN Controller (WLC) to act as a gateway between the
- Written by Edwin Tambi
- Posted on August 19, 2020
- Updated on March 11, 2024
- 15920 Views
EOS supports the ability to match on a single VLAN tag (example: encapsulation dot1q vlan 10) or a VLAN tag pair (example: encapsulation dot1q vlan 10 inner 20) to map matching packets to an interface. In this case, the encapsulation string is considered consumed by the mapped interface before forwarding, which means that the tags are effectively removed from the incoming packet for the purposes of any downstream forwarding.
- Written by Kaushik Kumar Ram
- Posted on August 21, 2020
- Updated on May 7, 2024
- 7018 Views
Generic UDP Encapsulation (GUE) is a general method for encapsulating packets of arbitrary IP protocols within a UDP tunnel. GUE provides an extensible header format with optional data. In this release, decap capability of GUE packets of variant 1 header format has been added. This variant allows direct encapsulation using the UDP header without the GUE header. The inner payload could be one of IPv4, IPv6, or MPLS.
- Written by Shyam Kota
- Posted on April 9, 2021
- Updated on November 2, 2021
- 6151 Views
gNOI (gRPC Network Operations Interface) defines a set of gRPC based microservices for executing operational
- Written by Phil Whineray
- Posted on August 20, 2020
- Updated on October 13, 2021
- 5589 Views
In rare circumstances, a Single Event Upset may cause an underflow in the free list of buffers of a switch chip. This can
- Written by Arpit Bansal
- Posted on August 18, 2020
- Updated on August 18, 2020
- 5392 Views
Level 1 2 routers set attached bit in their Level 1 LSPs to indicate their reachability to the rest of the network. A
- Written by Athichart Tangpong
- Posted on October 22, 2018
- Updated on June 7, 2023
- 11218 Views
A L2 sub-interface is a logical bridging endpoint associated with traffic on an interface distinguished by 802.1Q tags, where each <interface, 802.1q tag> tuple is treated as a first class bridging interface.
- Written by Jeff Hornsberger
- Posted on August 19, 2020
- Updated on August 19, 2020
- 6595 Views
LDP End of LIB is a signaling enhancement defined in RFC 5919 to allow an LDP speaker to notify a neighbor when it has
- Written by Xin Guang (Tony) Du
- Posted on August 25, 2016
- Updated on November 23, 2020
- 8407 Views
The LDP pseudowire feature provides support for emulating Ethernet connections over a Multiprotocol Label
- Written by Robert Esposito
- Posted on April 27, 2020
- Updated on July 21, 2023
- 21264 Views
Arista switches provide several mirroring features. Filtered mirroring to CPU adds a special destination to the
- Written by Bhavin Patel
- Posted on August 25, 2020
- Updated on August 25, 2020
- 4627 Views
Currently, for any Mpls over Gre (MoG) Tunnel we allocate eedb resources for each resource type.
- Written by Haotian Zhang
- Posted on August 25, 2020
- Updated on February 5, 2022
- 6757 Views
This article describes some enhanced mirroring configurations in addition to the ones described in
- Written by Hua Zhong
- Posted on August 26, 2020
- Updated on August 26, 2020
- 5569 Views
Support for running multiple CLI commands in one line separated by semicolons. Multiple CLI commands
- Written by Kiran Kumar Immidi
- Posted on August 25, 2020
- Updated on August 25, 2020
- 5965 Views
The candidate configuration feature implements support for a candidate data store as specified in RFC6241.
- Written by Chitra Ramachandran
- Posted on August 18, 2020
- Updated on August 18, 2020
- 5165 Views
An OSPF router can attract all traffic towards itself from within the OSPF network, by advertising a default route.
- Written by Chris Roche
- Posted on August 25, 2020
- Updated on August 30, 2020
- 4879 Views
Section 9.5 of RFC2328 “OSPF Version 2” states that the mask in Hello packets should be set to 0.0.0.0 when
- Written by Panduranga Bhat
- Posted on September 1, 2020
- Updated on September 7, 2020
- 5038 Views
This feature rewrites the overlay source MAC address of the packet which egresses the switch after the VXLAN
- Written by Ethan Vadai
- Posted on March 6, 2020
- Updated on March 14, 2024
- 13261 Views
Policy-based routing (PBR) is a feature that is applied on routable ports, to preferentially route packets. Forwarding is based on a policy that is enforced at the ingress of the applied interface and overrides normal routing decisions. In addition to matches on regular ACLs, PBR policy-maps can also include “raw match” statements that look like a single entry of an ACL as a convenience for users.
- Written by Coy Humphrey
- Posted on September 15, 2020
- Updated on February 8, 2024
- 7909 Views
This TOI describes a set of enhancements made to the existing Port Security: Protect Mode (PortSec-Protect) feature. Please see the existing TOI for this feature here:Port Security: Protect Mode
- Written by Eudean Sun
- Posted on August 28, 2019
- Updated on November 3, 2021
- 5586 Views
Power over Ethernet (PoE) is a way of delivering power and data over the same Ethernet wires. There have been multiple
- Written by Navlok Mishra
- Posted on August 16, 2018
- Updated on June 19, 2019
- 7614 Views
This feature is an extension of Qos Policy. It allows the user to configure Qos Policy Map counters. If a class map is
- Written by Shyam Kota
- Posted on November 23, 2020
- Updated on November 24, 2020
- 7701 Views
This feature is an extension of Qos Policy. It allows the user to configure Qos Policy Map counters. If a class map is
- Written by Sulyab Thottungal Valapu
- Posted on August 25, 2020
- Updated on August 25, 2020
- 4930 Views
This document describes the feature that allows redistribution of DHCPv6 routes into OSPFv3. This
- Written by Srinivas Kovvuri
- Posted on December 22, 2017
- Updated on October 13, 2021
- 7003 Views
Equal Cost Multi path (ECMP) provides the ability to load share traffic across multiple next hops.
- Written by Ram Prasad
- Posted on October 22, 2018
- Updated on October 19, 2021
- 8223 Views
This feature allows a Service Provider (SP) or an Enterprise to provide the service of interconnecting
- Written by Navdeep Bhatia
- Posted on August 24, 2020
- Updated on August 25, 2020
- 5133 Views
Route Cache is a feature where users can configure Static EVPN VXLAN routes beyond the hardware capacity. The
- Written by Robert Van Dijk
- Posted on August 20, 2020
- Updated on September 4, 2020
- 5046 Views
This feature adds support for ‘match ip(v6) resolved next hop’ clause under route map config for BGP policy
- Written by John Foley
- Posted on August 19, 2020
- Updated on August 19, 2020
- 4625 Views
The “set as path prepend” and “set as path match all replacement” route map configuration clauses now have a
- Written by Martin Stigge
- Posted on September 16, 2020
- Updated on January 11, 2022
- 7132 Views
RSVP TE, the Resource Reservation Protocol (RSVP) for Traffic Engineering (TE), is used to distribute MPLS labels
- Written by Haotian Zhang
- Posted on June 4, 2020
- Updated on February 7, 2022
- 6411 Views
This article describes the support for Filtered Mirroring using security ACL. The user can selectively mirror
- Written by Michael Chin
- Posted on January 18, 2019
- Updated on September 15, 2023
- 6923 Views
The ‘show interfaces interactions’ command aims to provide users a resource that explains various relationships between ethernet interfaces. It describes interactions in which a configuration on an interface causes another set of interfaces to become inactive or have reduced capabilities.Examples include a primary interface consuming subordinate interfaces to service a four-lane speed or platform restrictions that require four interfaces of a port to operate at the same speed.
- Written by Rahul Verma
- Posted on August 27, 2020
- Updated on August 27, 2020
- 4380 Views
Subinterfaces divide a single ethernet or port channel interface into multiple logical L2 or L3 interfaces based on
- Written by Deepanshu Shukla
- Posted on August 21, 2020
- Updated on June 5, 2023
- 9826 Views
This feature adds support for “Dynamic Load Balancing (DLB)” on Equal Cost Multi Path (ECMP) groups.
It is intended to help overcome the potential shortcomings of traditional hash-based load balancing by considering the traffic load of members of ECMP groups. DLB considers the state of the port while assigning egress ports to packets, resulting in a more even flow. The state of each port member is determined by measuring the amount of data transmitted from a given port and total number of packets enqueued to a given port.
- Written by Rajiv Patil
- Posted on September 16, 2020
- Updated on March 29, 2023
- 10611 Views
Dynamic NAT is a feature which dynamically allocates an IP address to an incoming or outgoing flow. This address will replace source or destination IP for all packets of the flow.