- Written by Nandan Saha
- Posted on August 24, 2020
- Updated on May 22, 2024
- 11585 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 Pauric Ward
- Posted on March 13, 2024
- Updated on November 6, 2024
- 3075 Views
Administrative Groups (AG) provide a way to associate certain attributes or policies with connections between nodes , enabling network administrators to control the routing decisions based on specific criteria. Extended Administrative Groups (EAG) are an extension of AG which allow a larger range of admin groups to be utilized for various Traffic Engineering (TE) purposes within a network. EAGs are defined in a new sub-TLV for IS-IS link attributes, separate to AGs, however they are considered as one within EOS. The EAG feature in EOS allows the range of administrative color to be increased from 0-31 to 0-127.
- Written by Tanushree Bansal
- Posted on June 11, 2019
- Updated on June 20, 2019
- 7131 Views
This feature implements RFC6119, which allows the extension of IS IS protocol to carry IPv6 Traffic Engineering
- Written by Arpit Bansal
- Posted on April 23, 2018
- Updated on November 7, 2024
- 8167 Views
Traffic Engineering (TE) provides a mechanism to network administrators to control the path that a data packet takes, bypassing the standard routing model which uses routes along the shortest path. Traffic engineered paths are generally computed on the head-end routers of the topology based on various constraints (e.g. minimum bandwidth, affinity) configured for those paths and attributes (e.g available bandwidth, color) received from devices in the network topology. IS-IS Traffic Engineering (IS-IS TE) feature extends IS-IS protocol in EOS to carry TE attributes as part of its Link State Protocol Data Units (LSPs). Note that IS-IS in EOS only acts as a carrier for TE attributes and it is not used by any processing (e.g. SPF).
- Written by Ryan Halbrook
- Posted on June 28, 2021
- Updated on June 28, 2021
- 8563 Views
Multipath color is a new multicast multipath mode for controlling PIM RPF selection. In the default multipath
- Written by Nikhil Satish Pai
- Posted on June 13, 2019
- Updated on June 13, 2019
- 6757 Views
OSPF supports all of RFC3630 and parts of RFC4203. When configured, OSPF generates the following information in
- Written by Denny Hung
- Posted on March 3, 2023
- Updated on March 13, 2023
- 5591 Views
This feature adds support to interface traffic policies for routing matched unicast IPv4 or IPv6 traffic which ingresses on L3 interfaces according to the routing table of a secondary VRF.
- Written by Kalash Nainwal
- Posted on December 14, 2020
- Updated on July 31, 2024
- 12488 Views
RSVP-TE, the Resource Reservation Protocol (RSVP) for Traffic Engineering (TE), is used to distribute MPLS labels for steering traffic and reserving bandwidth. The Label Edge Router (LER) feature implements the headend functionality, i.e., RSVP-TE tunnels can originate at an LER which can steer traffic into the tunnel.
- Written by Zhen Xue
- Posted on June 29, 2020
- Updated on June 5, 2023
- 10685 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
- 10090 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
- 9692 Views
Segment Routing Traffic Engineering Policy (SR TE) aka SR Policy makes use of Segment Routing (SR) to allow a headend