- Written by Nandan Saha
- Posted on August 24, 2020
- Updated on May 22, 2024
- 10554 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 Zetang Lei
- Posted on July 2, 2024
- Updated on July 3, 2024
- 654 Views
This feature introduces a way for IS-IS to advertise its IP reachability and SID for loopback interfaces only when routes matching an RCF function are present. One example use-case is to use IS-IS Segment Routing to attract traffic to a router only when routes towards the ultimate destination are present.
- Written by Navneet Sinha
- Posted on June 29, 2016
- Updated on July 30, 2024
- 12836 Views
Segment Routing provides 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”. IS-IS Segment Routing (henceforth referred to as IS-IS SR) provides means to advertise such segments through IS-IS protocol.
- Written by Manoj Agiwal
- Posted on September 30, 2019
- Updated on September 30, 2019
- 6143 Views
This feature allows a user to configure multiple static adjacency SIDs for an IS IS adjacency. This feature is an
- Written by David Cronin
- Posted on March 3, 2022
- Updated on August 28, 2024
- 10259 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 Zhen Xue
- Posted on June 29, 2020
- Updated on June 5, 2023
- 9579 Views
Bidirectional Forwarding Detection (BFD) is a protocol that provides low-overhead, short-duration detection of failures of arbitrary paths between two systems.
- Written by Manoharan Sundaramoorthy
- Posted on November 12, 2019
- Updated on November 15, 2019
- 9110 Views
Segment Routing Traffic Engineering Policy (SR TE) aka SR Policy makes use of Segment Routing (SR) to allow a headend
- Written by Nandan Saha
- Posted on August 26, 2019
- Updated on September 5, 2019
- 8767 Views
Segment Routing Traffic Engineering Policy (SR TE) aka SR Policy makes use of Segment Routing (SR) to allow a headend
- Written by Nikhil Goyal
- Posted on January 29, 2024
- Updated on January 29, 2024
- 2485 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 Sandeep Kopuri
- Posted on October 7, 2019
- Updated on May 17, 2024
- 9916 Views
Topology Independent Fast Reroute, or TI-LFA, uses IS-IS SR to build loop-free alternate paths along the post-convergence path. These loop-free alternates provide fast convergence.