- Written by Alex Volinsky
- Posted on April 30, 2021
- Updated on June 11, 2021
- 1480 Views
400GBASE ZR transceiver is the industry’s first multi vendor DWDM standard, a Digital Coherent Optical module
- Written by Graeme Rennie
- Posted on March 31, 2017
- Updated on April 18, 2022
- 861 Views
This article describes a feature for Tap Aggregation mode, which strips IEEE 802.1BR E-Tag and Cisco VN-Tag headers from all tagged packets received on tap interface before delivering them out of tool interfaces.
- Written by Tarun Jaswanth LNU
- Posted on August 24, 2020
- Updated on June 16, 2022
- 4410 Views
802.1X is an IEEE standard protocol that prevents unauthorized devices from gaining access to the network.
- Written by Robert Esposito
- Posted on February 17, 2021
- Updated on April 20, 2022
- 2276 Views
Filtered Mirroring allows certain packets to be selected for mirroring, rather than all packets ingressing or
- Written by Vaibhav Gaiha
- Posted on April 30, 2021
- Updated on April 30, 2021
- 605 Views
This feature allows the global configuration, "allow non ect or non ect packet thresholds" along with "set drop
- Written by Will Rideout
- Posted on February 16, 2021
- Updated on February 22, 2021
- 914 Views
BFD (Bidirectional Forwarding Detection) session telemetry allows for the collection of per session statistics as
- Written by Joseph Swaminathan
- Posted on February 24, 2021
- Updated on February 5, 2022
- 777 Views
BGP Add Path TX allows for a BGP speaker to advertise multiple paths (instead of a single best path) for a prefix towards
- Written by Srinivasan Koona Lokabiraman
- Posted on February 17, 2021
- Updated on June 21, 2022
- 976 Views
The BGP graceful restart mechanism has a limitation that the graceful restart time cannot exceed 4095 seconds per the
- Written by Manoj Agiwal
- Posted on September 30, 2015
- Updated on March 28, 2022
- 2019 Views
BGP Non Stop Forwarding (NSF) aims to minimize the traffic loss when the the following scenarios occur:
- Written by Prashanth Rajendran
- Posted on March 16, 2021
- Updated on March 16, 2021
- 873 Views
This feature adds support for BGP peering with multiple peers using the same IP address. The router id of those peers is
- Written by Diego Asturias
- Posted on April 7, 2021
- Updated on April 7, 2021
- 1070 Views
CLI extension allows for custom CLIs commands/modes to be defined in EOS. It also integrates with EOS SDK to be able to
- Written by Augusto Wong
- Posted on February 17, 2021
- Updated on March 3, 2021
- 1668 Views
DHCP Relay feature forwards DHCP packets between client and server when the DHCP Server is not in the same broadcast
- Written by VICTOR WEN
- Posted on April 7, 2021
- Updated on February 18, 2022
- 1540 Views
EOS supports the DHCP Relay feature, which relays DHCP Requests/Responses between DHCP clients and DHCP servers in different subnets.
- Written by Yongguang Xu
- Posted on February 17, 2021
- Updated on February 17, 2021
- 718 Views
The Dot1x Dropped Counters count the packets that get dropped for dot1x interfaces. The following
- Written by Shyam Kota
- Posted on August 16, 2018
- Updated on April 28, 2021
- 1078 Views
The feature allows to create a named TC DSCP mapping that can be applied on an interface. Dscp of
- Written by Pawel Kurdybacha
- Posted on February 16, 2021
- Updated on February 16, 2021
- 948 Views
The feature allows assigning of class E addresses to interfaces by default with no option to turn that off and routing
- Written by Sudheer Y R
- Posted on October 9, 2018
- Updated on March 30, 2022
- 4052 Views
This feature introduces the hardware forwarding support for IPv4 over IPv4, GRE Tunnel interfaces on Arista
- Written by Aman Aman-Ul-Haq
- Posted on March 9, 2021
- Updated on January 3, 2022
- 1487 Views
The Segment security feature provides the convenience of applying policies on segments rather than interfaces or
- Written by Kaushik Kumar Ram
- Posted on August 21, 2020
- Updated on March 17, 2021
- 1036 Views
Generic UDP Encapsulation (GUE) is a general method for encapsulating packets of arbitrary IP protocols within a UDP
- Written by Utkarsha Verma
- Posted on February 18, 2021
- Updated on November 17, 2021
- 1286 Views
Arista campus switches allow extensive and fine grained hardware based flow tracking and management features. They
- Written by Jonathan Kehler
- Posted on January 22, 2019
- Updated on October 19, 2021
- 748 Views
This feature introduces the ability to match on 1) any BGP aggregate contributor or 2) a specific BGP aggregate’s
- Written by Romeyo Dsouza
- Posted on February 17, 2021
- Updated on February 17, 2021
- 692 Views
EOS 4.25.2F adds support for IS IS, OSPF and OSPFv3 Graceful Restart (GR) on unplanned software restarts for all
- Written by Shamit Kapadia
- Posted on February 23, 2021
- Updated on February 5, 2022
- 744 Views
In EVPN deployment with VXLAN underlay when an EVPN type 5 prefix is imported into an IP VRF, the IGP cost of the underlay
- Written by Andy Cheng
- Posted on April 22, 2021
- Updated on April 22, 2021
- 1423 Views
InfluxDB telemetry streaming feature enables telemetry data collection with Telegraf on box, and allows streaming
- Written by Ramakrishnan G
- Posted on April 18, 2018
- Updated on June 22, 2022
- 1524 Views
The L2EVPN MPLS feature is available when configuring BGP in the multi agent routing protocol model.
- Written by Ramakrishnan G
- Posted on February 23, 2021
- Updated on June 22, 2022
- 795 Views
In a multihomed EVPN MPLS configuration, BUM packets sent from a non-designated forwarder (Non-DF) PE to a designated forwarder (DF) PE must carry ESI label advertised by the egress DF PE.
- Written by Athichart Tangpong
- Posted on October 22, 2018
- Updated on February 25, 2022
- 2651 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. Like other types of interfaces, a L2 sub-interface is a normal bridging endpoint in the bridging domain.
- Written by VIKAS NARAYANAPPA
- Posted on March 17, 2021
- Updated on May 11, 2022
- 731 Views
If a network device uses deep packet inspection for load balancing, RFC6790 recommends deployments to use entropy label in LDP to improve load balancing in MPLS networks by providing sufficient entropy in the label stack itself.
- Written by Michael Chin
- Posted on February 22, 2021
- Updated on February 22, 2021
- 1034 Views
Line system commands are supported on all platforms. OSFP LS modules are enabled by default on insertion.
- Written by Yashvir Singh
- Posted on March 2, 2021
- Updated on June 20, 2022
- 1093 Views
This feature allows classification of packets on QoS policy-maps based on the COS/Vlan+COS bits in the 802.1q header of the packet. CoS (Class of Service) corresponds to the Priority code point (PCP) bits in the 802.1q header.
- Written by Yashvir Singh
- Posted on March 2, 2021
- Updated on March 2, 2021
- 786 Views
This feature allows classification of packets based on the inner VLAN value along with the VLAN and CoS bits in a double
- Written by Anil Joshi
- Posted on June 29, 2016
- Updated on February 16, 2021
- 1143 Views
MPLS over GRE encapsulation support in EOS 4.17.0 enables tunneling IPv4 packets over MPLS over GRE tunnels. This
- Written by Binoshmon T B
- Posted on July 22, 2020
- Updated on June 27, 2022
- 2294 Views
The TCP MSS clamping feature involves clamping the maximum segment size (MSS) in the TCP header of TCP SYN packets if it exceeds the configured MSS ceiling limit for the interface. Clamping MSS value helps in avoiding IP fragmentation in tunnel scenarios by ensuring that MSS is small enough to accommodate the extra overhead of GRE and tunnel outer IP headers.
- Written by Paul Fallon
- Posted on March 17, 2021
- Updated on March 17, 2021
- 738 Views
For an octal port such as a QSFPDD or OSFP, this feature renumbers the ports on a system to have 4 configurable
- Written by Ajay Kini
- Posted on November 2, 2020
- Updated on April 7, 2021
- 911 Views
In a symmetric network topology, for the same ECMP (Equal Cost Multi Path) route programmed at different devices in a
- Written by Chris Roche
- Posted on December 16, 2019
- Updated on March 30, 2022
- 1116 Views
This feature introduces the support for OSPF routes over GRE tunnels under default as well as non-default VRFs. The feature is disabled by default.
- Written by Tanushree Bansal
- Posted on February 23, 2022
- Updated on June 2, 2022
- 617 Views
This feature provides isolation and allows segregating/dividing the link state database based on interface.
- Written by Conor Hopkins
- Posted on March 16, 2021
- Updated on March 16, 2021
- 976 Views
The current behaviour on R series products is to drop all packets marked for drop by the chip Packet Processor in the
- Written by Nikhil Satish Pai
- Posted on March 24, 2021
- Updated on March 30, 2021
- 978 Views
This feature may be used for redistributing OSPFv2 leaked and non leaked routes from one instance to another when
- Written by Emil Maric
- Posted on February 16, 2021
- Updated on February 16, 2021
- 1081 Views
Routes covered by a resilient equal cost multi path (RECMP) prefix are types of routes that make use of hardware tables
- Written by Sharad Birmiwal
- Posted on November 4, 2020
- Updated on February 11, 2022
- 4402 Views
Routing control functions (RCF) is a new language that can be used to express BGP route filtering and attribute
- Written by Martin Stigge
- Posted on September 16, 2020
- Updated on January 11, 2022
- 1450 Views
RSVP TE, the Resource Reservation Protocol (RSVP) for Traffic Engineering (TE), is used to distribute MPLS labels
- Written by Jeevan Kamisetty
- Posted on February 26, 2021
- Updated on February 5, 2022
- 1416 Views
Sampled flow tracking with IPFIX export is supported on most of the Arista platforms. User configured sampling rate
- Written by Haotian Zhang
- Posted on June 4, 2020
- Updated on February 7, 2022
- 1136 Views
This article describes the support for Filtered Mirroring using security ACL. The user can selectively mirror
- Written by Athish Rao
- Posted on March 5, 2021
- Updated on February 5, 2022
- 1656 Views
Segment Routing Traffic Engineering Policy (SR TE) aka SR Policy makes use of Segment Routing (SR) to allow a headend
- Written by Yongxiang Chen
- Posted on February 19, 2021
- Updated on February 19, 2021
- 1027 Views
4.25.2F introduces storm control with packet per second support in the platforms listed below. TOI describing the
- Written by Yongxiang Chen
- Posted on February 19, 2021
- Updated on February 19, 2021
- 1254 Views
Storm control enables traffic policing on floods of packets on L2 switching networks. The documentation describes
- Written by Matthew Carrington-Fair
- Posted on February 22, 2021
- Updated on May 6, 2021
- 974 Views
Prior to 4.25.2F, support for BGP PIC was restricted to locally identifiable failures such as link failures. If a
- Written by Jason Shamberger
- Posted on March 11, 2020
- Updated on February 22, 2021
- 2896 Views
EOS 4.21.3F introduces support for BGP Flowspec, as defined in RFC5575 and RFC7674. The typical use case is to filter
- Written by Yongguang Xu
- Posted on February 22, 2021
- Updated on June 24, 2022
- 879 Views
The multicast route counters count packets and bytes per group, source and vrf. Every multicast route will be counted when the feature is turned on if there are sufficient hardware counter resources available.