Registries included below
Standards Action
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. | [RFC8665] |
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. | [RFC8665] |
2-127 | Unassigned | |
128-255 | Flexible Algorithms (TEMPORARY - registered 2018-06-06, extension registered 2020-05-12, expires 2021-06-06) | [draft-ietf-lsr-flex-algo] |
Expert Review
Uma Chunduri, Jeff Tantsura
Value | Name | Reference |
---|---|---|
0 | Reserved | [RFC8491] |
1 | Base MPLS Imposition MSD | [RFC8491] |
2 | ERLD-MSD | [RFC-ietf-isis-mpls-elc-13] |
3-40 | Unassigned | |
41 | SRH Max SL | [draft-ietf-lsr-isis-srv6-extensions-08] |
42 | SRH Max End Pop | [draft-ietf-lsr-isis-srv6-extensions-08] |
43 | Unassigned | |
44 | SRH Max H.encaps | [draft-ietf-lsr-isis-srv6-extensions-08] |
45 | SRH Max End D | [draft-ietf-lsr-isis-srv6-extensions-08] |
46-250 | Unassigned | |
251-254 | Experimental Use | [RFC8491] |
255 | Reserved | [RFC8491] |
Expert Review
Les Ginsberg, Chris Hopps
Bit | Name | Reference |
---|---|---|
0 | RSVP-TE (R-bit) | [RFC8919] |
1 | Segment Routing Policy (S-bit) | [RFC8919] |
2 | Loop Free Alternate (F-bit) | [RFC8919] |
3-63 | Unassigned |