- Written by Shamit Kapadia
- Posted on May 3, 2022
- Updated on March 10, 2026
- 13188 Views
Routing control functions (RCF) is a language that can be used to express route filtering and attribute modification logic in a powerful and programmatic fashion.
- Written by Shamit Kapadia
- Posted on May 3, 2022
- Updated on January 28, 2026
- 11924 Views
Routing control functions (RCF) is a language that can be used to express route filtering and attribute modification logic in a powerful and programmatic fashion.
- Written by Paraic Gallagher
- Posted on March 17, 2025
- Updated on January 28, 2026
- 3629 Views
Routing control functions (RCF) is a language that can be used to express route filtering and attribute modification logic in a powerful and programmatic fashion.
- Written by Nandan Saha
- Posted on August 26, 2019
- Updated on September 5, 2019
- 14688 Views
Segment Routing Traffic Engineering Policy (SR TE) aka SR Policy makes use of Segment Routing (SR) to allow a headend
- Written by Manoharan Sundaramoorthy
- Posted on November 12, 2019
- Updated on November 15, 2019
- 14975 Views
Segment Routing Traffic Engineering Policy (SR TE) aka SR Policy makes use of Segment Routing (SR) to allow a headend
- Written by Francesco Belletti
- Posted on June 20, 2022
- Updated on June 30, 2022
- 11741 Views
This feature enables the BGP additional-path send configuration only for routes whose prefixes match a prefix list. The goal is to advertise multiple paths for a specific set of routes.
- Written by Vishrant Vasavada
- Posted on June 5, 2023
- Updated on June 5, 2023
- 8111 Views
A new configuration command label local-termination explicit-null under BGP LU address family allows BGP LU speakers to send explicit-null labels for prefixes for which the router is a terminating LSP node. The prefix is expected to be originating locally (via network command).
- Written by David Cronin
- Posted on April 15, 2021
- Updated on April 15, 2021
- 12363 Views
In EOS, BGP creates different update groups based on the outbound configuration. Different route maps or Routing
- Written by Paulo Panhoto
- Posted on December 16, 2019
- Updated on December 16, 2019
- 10775 Views
This command stores and displays a list of failed BGP connection attempts for each peer. This may be particularly
- Written by Quentin L'Hours
- Posted on May 14, 2020
- Updated on May 14, 2020
- 11331 Views
Support for negotiating and receiving IPv6 unicast and IPv6 labeled unicast (6PE) updates from a BGP peer.
- Written by Gary McCarthy
- Posted on October 18, 2024
- Updated on October 18, 2024
- 5393 Views
Currently, EOS supports the receiving and transmitting of BGP Flowspec rules. Rules received can be installed locally as ACLs and/or transmitted to other BGP peers/route reflectors. EOS relies on external controllers to inject these flowspec rules. The feature will allow flowspec rules to be defined via CLI in a similar fashion as traffic-policies is currently done. These policies would then be redistributed into BGP. Once redistributed, the rules can be advertised to other BGP peers and optionally installed locally on the configured system.
- Written by Christopher Brown
- Posted on January 8, 2026
- Updated on January 8, 2026
- 784 Views
The aggregate address minimum contributors feature adds the capability to specify a minimum number of contributor routes that must be present and advertisable in order for the BGP speaker to generate the route for the aggregate address.
- Written by Eamon Doyle
- Posted on September 3, 2021
- Updated on September 5, 2021
- 10645 Views
BGP address aggregation was previously only supported for IPv4 and IPv6 unicast address families. Equivalent BGP
- Written by Arista Admin
- Posted on December 16, 2020
- Updated on December 16, 2020
- 12982 Views
This document describes the Bgp Peer Flap Damping feature which allows session damping for peers with bfd enabled.
- Written by Sharad Tulsyan
- Posted on November 8, 2023
- Updated on November 8, 2023
- 9140 Views
This document describes the route Flap Damping feature in multi-agent BGP.
- Written by Shamit Kapadia
- Posted on October 20, 2022
- Updated on October 26, 2022
- 9979 Views
BGP Monitoring Protocol (BMP) allows a monitoring station to connect to a router and collect all of the BGP announcements received from the router’s BGP peers. The announcements are sent to the station in the form of BMP Route Monitoring messages generated from path information in the router’s BGP Adj-Rib-In tables.
- Written by Rutger Beltman
- Posted on November 29, 2023
- Updated on November 29, 2023
- 8020 Views
EOS supports configuring and associating communities on static routes. These are carried into BGP on redistribution.
- Written by Matthew Carrington-Fair
- Posted on December 31, 2019
- Updated on December 31, 2019
- 11247 Views
EOS 4.23.1F introduces the ability to configure the color extended community in route map set clauses and in an
- Written by Rutger Beltman
- Posted on February 7, 2024
- Updated on February 9, 2024
- 7377 Views
In EOS-4.31.2F ipv6 link-local next-hops can now be configured in BGP through RCF (Routing Control Functions). On the advertising BGP agent an ipv6 link-local next-hop is configured on the outbound policy function. The receiving BGP agent reads this link-local next-hop and automatically assigns the interface from which the BGP path was sent.
- Written by Vishrant Vasavada
- Posted on October 28, 2020
- Updated on February 3, 2022
- 11662 Views
This feature extends link bandwidth extended community deletion mechanism, which previously always required
- Written by Adriana Costin
- Posted on March 3, 2023
- Updated on March 6, 2023
- 9059 Views
This feature introduces a new CLI command (agent Bgp snapshot mrt received routes [ VRF ] FILE) which generates an MRT file containing the peers, prefixes and path attributes received by a switch running multi-agent routing m
- Written by Sharad Birmiwal
- Posted on February 21, 2024
- Updated on February 21, 2024
- 6811 Views
BGP Monitoring Protocol (BMP) allows a monitoring station to connect to a router and collect all of the BGP announcements received from the router’s BGP peers. The announcements are sent to the station in the form of BMP Route Monitoring messages generated from path information in the router’s BGP internal tables. A BMP speaker may choose to send either Adj-Rib-In routes, or Loc-Rib routes (as defined by RFC9069), or both.
- Written by Shyam Kota
- Posted on January 18, 2019
- Updated on January 23, 2019
- 9822 Views
The route map feature in BGP allows filtering and manipulating BGP path information. It combines set statements with
- Written by Vishrant Vasavada
- Posted on November 12, 2019
- Updated on January 21, 2022
- 12144 Views
Unequal cost multi path (UCMP) for BGP is a mechanism for forwarding ECMP route traffic using weights, with which the
- Written by Xiaoman Chu
- Posted on August 18, 2022
- Updated on June 6, 2023
- 16497 Views
This feature allows customers to configure BFD intervals on a per BGP neighbor basis. We also have existing support for the configuration of BFD intervals on a per interface basis and the configuration of BFD intervals globally on the entire device.
- Written by Sandeep Betha
- Posted on April 21, 2020
- Updated on April 27, 2020
- 12386 Views
In the ribd routing protocol model, the “maximum paths … ecmp …” command allows restricting the number of BGP
- Written by Vipul Shah
- Posted on August 27, 2019
- Updated on January 20, 2026
- 10301 Views
BGP routing information often contains more than one path to the same destination network. The BGP best-path selection algorithm determines which of these paths should be considered as the best path to that network
- Written by Hariram Natarajan
- Posted on January 16, 2020
- Updated on January 17, 2020
- 9965 Views
Configuring the IGP cost for tunnels is a feature that allows influencing the BGP best path selection for routes
- Written by Christopher Brown
- Posted on October 4, 2019
- Updated on October 4, 2019
- 10027 Views
Unequal Cost Multi Path (UCMP) is a mechanism for forwarding traffic for an ECMP route by using a ratio of weights
- Written by Manpreet
- Posted on June 29, 2023
- Updated on July 11, 2023
- 10787 Views
Default routing protocols model will be set to multi-agent in 4.30.1. Note that the default value is only used if a value is not specified in startup-config.
- Written by Nikhil Satish Pai
- Posted on August 18, 2022
- Updated on August 22, 2022
- 9697 Views
The feature will provide the ability to error disable local interfaces in a BGP VPWS pseudowire when the remote interface is shutdown or whenever we do not receive a response from BGP.
- Written by Gary McCarthy
- Posted on January 30, 2024
- Updated on August 21, 2025
- 7088 Views
VRF redirection often requires matching packets’ source addresses against one or more sets of IP prefixes. This can become difficult to manage when the prefix sets need to be consistently maintained on several devices and either change too frequently or are very large. When the prefixes for the prefix sets are learned by BGP, this feature provides an alternative to maintaining unwieldy sets of statically configured IP prefixes.
