Refer to the exhibit. Customer A and customer B are connecting through a service provider network with these requirements: - R1 acts as the mapping server to connect 10.0.0.0/30 and 172.16.0.0/30…

Question

Exhibit

Options

• ARemove allocation of prefix SlDs for 10.0.0.0/30 and 172.16.0.0/30 on R1
• BConfigure segment-routing prefix-sid-map advertise-local on R1
• CAllocate prefix SIDs for 10.0.0.0/30 and 172.16 0.0/30 subnets on R2
• DConfigure segment-routing prefix-sid-map advertise-local on R2

• A
  4% (2)
• B
  72% (38)
• C
  15% (8)
• D
  9% (5)

Explanation

In Segment Routing with a mapping server/client architecture, the mapping server (R1) holds the prefix-SID mappings and must advertise them to mapping clients (R2) via BGP-LS. The command 'segment-routing prefix-sid-map advertise-local' on the mapping server (R1) enables it to redistribute its locally configured prefix SID mappings into BGP-LS so that mapping clients can receive and use them. Without this command on R1, the mapping client R2 cannot learn the SID assignments for the 10.0.0.0/30 and 172.16.0.0/30 networks and cannot perform proper segment routing forwarding for transient traffic from Customer A.

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