350-501 · Question #272
Which feature describes the adjacency SID?
The correct answer is C. It is locally unique. An adjacency SID is a Segment Routing identifier that is locally significant to the router advertising it, indicating an adjacency to a neighbor or a set of neighbors.
Question
Which feature describes the adjacency SID?
Options
- AIt applies only to point-to-point links.
- BIt applies only to multipoint links
- CIt is locally unique
- DIt is globally unique.
How the community answered
(39 responses)- A8% (3)
- B3% (1)
- C87% (34)
- D3% (1)
Why each option
An adjacency SID is a Segment Routing identifier that is locally significant to the router advertising it, indicating an adjacency to a neighbor or a set of neighbors.
Adjacency SIDs can apply to both point-to-point and broadcast (multipoint) links, not exclusively to point-to-point links.
Adjacency SIDs apply to both point-to-point and multipoint links, not exclusively to multipoint links.
An Adjacency SID (ASID) is assigned by a router to represent a specific adjacency, such as a link to a neighbor. These SIDs are locally unique to the assigning router, meaning the same ASID value can be used by different routers to represent different adjacencies without conflict in the Segment Routing domain.
Unlike Prefix SIDs, Adjacency SIDs are not globally unique; their uniqueness is confined to the local router that advertises them.
Concept tested: Segment Routing Adjacency SID properties
Source: https://www.cisco.com/c/en/us/td/docs/iosxr/segment-routing/b-segment-routing-cg-iosxr-60x/b-segment-routing-cg-iosxr-60x_chapter_01.html#concept_z5r_xcz_gmb
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