Interior Gateway Protocol (IGP) Parameters

Created
2017-12-18
Last Updated
2018-11-15
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Registries included below

IGP Algorithm Types

Registration Procedure(s)
Standards Action
Reference
[RFC-ietf-ospf-segment-routing-extensions-24]
Available Formats

CSV
Value Description Reference
0 Shortest Path First (SPF) algorithm based on link metric. This is the standard shortest path algorithm as computed by the IGP protocol. Consistent with the deployed practice for link-state protocols, Algorithm 0 permits any node to overwrite the SPF path with a different path based on its local policy. [RFC-ietf-ospf-segment-routing-extensions-24]
1 Strict Shortest Path First (SPF) algorithm based on link metric. The algorithm is identical to Algorithm 0 but Algorithm 1 requires that all nodes along the path will honor the SPF routing decision. Local policy at the node claiming support for Algorithm 1 MUST NOT alter the SPF paths computed by Algorithm 1. [RFC-ietf-ospf-segment-routing-extensions-24]
2-127 Unassigned
128-255 Flexible Algorithms (TEMPORARY - registered 2018-06-06, expires 2019-06-06) [draft-ietf-lsr-flex-algo]

IGP MSD-Types

Registration Procedure(s)
Expert Review
Expert(s)
Uma Chunduri, Jeff Tantsura
Reference
[RFC8491]
Available Formats

CSV
Value Name Reference
0 Reserved [RFC8491]
1 Base MPLS Imposition MSD [RFC8491]
2-250 Unassigned
251-254 Experimental Use [RFC8491]
255 Reserved [RFC8491]