- Written by Nikhil Goyal
- Posted on July 6, 2026
- Updated on July 7, 2026
- 47 Views
LDP over RSVP (also known as LDP tunneling) allows LDP-signaled LSPs to use RSVP-TE tunnels as forwarding shortcuts instead of following hop-by-hop IGP paths. Prior to this feature, LDP over RSVP was supported only with IS-IS as the IGP. This feature extends LDP over RSVP support to OSPF, enabling both headend (ingress) and transit functionality when OSPF is the IGP.
- Written by Nikhil Goyal
- Posted on December 20, 2024
- Updated on December 20, 2024
- 4670 Views
Topology Independent Fast Reroute, or TI-LFA, uses OSPF SR to build loop-free alternate paths along the post-convergence path. These loop-free alternates provide fast convergence.
- Written by Nikhil Goyal
- Posted on January 29, 2024
- Updated on November 13, 2024
- 8223 Views
Segment Routing provides a mechanism to define end-to-end paths within a topology by encoding paths as sequences of sub-paths or instructions. These sub-paths or instructions are referred to as “segments”. OSPF Segment Routing (henceforth referred to as OSPF SR) provides means to advertise such segments through OSPF protocol.
- Written by Nikhil Goyal
- Posted on August 18, 2022
- Updated on October 1, 2025
- 10332 Views
This feature adds streaming support for the IS-IS Link State Database OpenConfig model via gNMI. The current implementation supports a limited number of IS-IS TLVs and subTLVs.
- Written by Nikhil Goyal
- Posted on August 20, 2020
- Updated on August 20, 2020
- 10627 Views
This feature adds the support for learning multiple equal cost routes for a destination in the RIP protocol. This
- Written by Nikhil Goyal
- Posted on October 7, 2019
- Updated on December 21, 2021
- 12331 Views
The differentiated services code point (DSCP) is a 6 bit field in the IP header, which can be used to mark traffic for
- Written by Nikhil Goyal
- Posted on January 21, 2019
- Updated on January 21, 2019
- 10789 Views
This feature provides streaming of the IS IS Link State Database via TerminAttr. The IS IS LSDB is exported to Smash at
- Written by Nikhil Goyal
- Posted on November 22, 2017
- Updated on December 23, 2021
- 11609 Views
IS IS Graceful Restart adds support for Restart Signaling for IS IS, IETF RFC 5306. When IS IS is used
