What is the role of segment routing mapping server?

Question

Options

• AIt advertises a local SID mapping policy to all the mapping clients.
• BIt works with IGP instances to calculate the prefix-SIDs in the absence of a mapping policy.
• CIt selects multiple mapping entries to create overlapping active mapping policies.
• DIt reads and translates remotely received SIDs from other mapping servers to create SID mapping

• A
  89% (34)
• B
  3% (1)
• C
  3% (1)
• D
  5% (2)

Explanation

The Segment Routing Mapping Server (SRMS) bridges SR-capable and non-SR-capable nodes in a network. Non-SR nodes do not advertise Prefix-SID TLVs in IGP updates. The SRMS creates a local SID mapping policy that maps prefixes (announced by non-SR nodes) to SID values, then advertises these mappings to all SR-capable mapping clients via the IGP (IS-IS or OSPF). This allows the SR domain to assign and use SIDs for destinations that cannot advertise their own. The SRMS does not calculate prefix-SIDs using IGP instances, does not create overlapping mapping entries (overlapping entries are explicitly avoided), and does not translate SIDs from other mapping servers.

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