Interior Gateway Protocol (IGP) Parameters
Created
2017-12-18
Last Updated
2017-12-18
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Registry included below
* IGP Algorithm Types
IGP Algorithm Types
Registration Procedure(s)
Standards Action
Reference
[RFC-ietf-ospf-segment-routing-extensions-24]
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Value Description Reference
Shortest Path First (SPF) algorithm based on link metric. This is the standard shortest path
0 algorithm as computed by the IGP protocol. Consistent with the deployed practice for [RFC-ietf-ospf-segment-routing-extensions-24]
link-state protocols, Algorithm 0 permits any node to overwrite the SPF path with a
different path based on its local policy.
Strict Shortest Path First (SPF) algorithm based on link metric. The algorithm is identical
1 to Algorithm 0 but Algorithm 1 requires that all nodes along the path will honor the SPF [RFC-ietf-ospf-segment-routing-extensions-24]
routing decision. Local policy at the node claiming support for Algorithm 1 MUST NOT alter
the SPF paths computed by Algorithm 1.
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