- Written by Sandeep Betha
- Posted on January 22, 2021
- Updated on March 7, 2025
- 14191 Views
This feature adds support for user-configured BGP Nexthop Resolution RIB profiles for various BGP-based services e.g. IP unicast, L3 VPN, EVPN, etc. The feature allows an administrator to customize the next hop resolution semantics of BGP routes with an ordered list, or profile, of resolution RIB domains (i.e., either tunnel or IP domain). This allows EOS to direct specific services over the specified RIB domains, overriding the default behavior.
- Written by Gowtham Rameshkumar
- Posted on August 26, 2019
- Updated on November 11, 2019
- 10762 Views
This feature introduces hardware forwarding support for IPv4 over IPv4 GRE tunnel interfaces on selected Arista
- Written by Gowtham Rameshkumar
- Posted on March 11, 2020
- Updated on May 21, 2025
- 13916 Views
This feature introduces hardware forwarding support for IPv4-over-IPv4 GRE tunnel interfaces on selected Arista
- Written by Harish Pradyot
- Posted on July 1, 2025
- Updated on July 1, 2025
- 2 Views
This feature when configured enables users to rewrite the DSCP of the GUE encapsulated header on IP-over-UDP tunnels while preserving the TOS value of the inner IP ( IPv4 / IPv6 ) payload. Starting from software version 4.34.1F, the CLI configuration to enable or disable DSCP preserve globally on the egress interface introduces a clear distinction in the behavior of GUE encapsulation on the core facing interface of the IP-over-UDP tunnels.
- Written by Shriprama Rao
- Posted on March 17, 2025
- Updated on March 17, 2025
- 1057 Views
This feature allows transport of multicast frames to an endpoint across an IP network by tunneling them through MPLSoGRE or MPLSoGUE. The tunneling of multicast frames is achieved with a traffic policy applied on the ingress interface which will match on all packets destined to a multicast IP address and redirect that traffic to a MoG nexthop group. The traffic policy will also specify “forced routing” in order to set the fwd_layer_index to 1 so that the L2 header is removed before encapsulation.
- Written by Jeff Hornsberger
- Posted on December 16, 2020
- Updated on April 19, 2022
- 10471 Views
LSPs formed by LDP normally follow IGP routing. The LDP speaker selects the downstream LSR for a particular prefix as
- Written by Girish Dasari
- Posted on April 30, 2025
- Updated on April 30, 2025
- 732 Views
At a transit router when multiple LSP are available for a given destination from different protocols EOS does stitching based on hard coded preferences. LFIB stitching preferences give a provision to stitch together different LSPs based on configurable preferences. For each protocol(destination) preference can be configured for a given source protocol.
- Written by Sharad Birmiwal
- Posted on October 11, 2019
- Updated on October 11, 2019
- 8994 Views
This feature allows configuring user defined tunnel RIBs for the resolution of LDP pseudowire endpoints. User
- Written by Sabarinath Timma Mohan
- Posted on August 31, 2023
- Updated on August 31, 2023
- 6640 Views
PIM Reverse Path Forwarding (RPF) is a mechanism that allows the multicast routers to send the PIM control packets to the upstream routers via the shortest path to form the RP/Source Tree.
- Written by David Cronin
- Posted on March 3, 2022
- Updated on June 24, 2025
- 15824 Views
Routing Control Functions (RCF) is a language that can express route filtering and attribute modification logic in a powerful and programmatic fashion.The document covers: Configurations of a RCF function for BGP points of application
- Written by Michael (Mike) Fink
- Posted on June 13, 2019
- Updated on June 20, 2019
- 8804 Views
When packets are encapsulated in tunnels via protocols such as GRE, sFlow samples with version 5 default extensions
- Written by Shyam Kota
- Posted on June 13, 2019
- Updated on December 30, 2021
- 9287 Views
This feature modifies the display format of “show interface Tunnel <num> counters” on hardware
- Written by Christoph Schwarz
- Posted on September 30, 2019
- Updated on August 27, 2020
- 9605 Views
EOS generates a single system defined tunnel RIB for next hop resolution. When tunnels to the same destination