Huawei Certified ICT Expert – Routing and Switching (HCIE-RS) — Question 45

On an MA network, SR-MPLS is enabled on all IS-IS routers. Which of the following statements is correct?

Answer options

• A. If SR-MPLS is enabled, no DIS needs to be elected.
• B. The DIS collects the SRGB of each router and advertises the SRGB to other routers on the MA network.
• C. LSPs generated by the DIS describe all IS-IS routers on the network.
• D. The DIS generates a special node ID.

Correct answer: B

Explanation

The correct answer is B because the DIS is responsible for collecting and advertising the SRGB to ensure routers have the necessary information for Segment Routing. Option A is incorrect since a DIS must still be elected for network operations. Option C is wrong as LSPs generated by the DIS do not describe every router on the network. Option D is also incorrect, as the DIS does not specifically generate a special node ID.