H12-891_V1.0 Exam Dumps : HCIE-Datacom V1.0

Let’s break it down:

A. ❌ Incorrect — Path computation can be done by both controller and ingress routers, not just the controller.

B. ✅ SR-MPLS extends IGP protocols (e.g., OSPF/IS-IS) for segment distribution, allowing smooth evolution.

C. ✅ Supports TI-LFA (Topology Independent Loop-Free Alternate) for fast failure recovery.

D. ✅ Through source routing, SR-MPLS integrates easily with applications for programmable path control.

Exact Extract – HCIE-Datacom Segment Routing Chapter:

“SR-MPLS supports distributed and centralized path computation, uses IGP extensions for deployment, and supports TI-LFA for FRR. It allows interaction with applications through programmable routing.”

In SR-MPLS (Segment Routing over MPLS), prefix SID conflicts may occur if multiple prefixes are assigned the same SID or vice versa.

Conflict resolution principle (Huawei standard):

When there are multiple SIDs for the same prefix, the SID with the lowest value wins.

When the same SID is assigned to multiple prefixes, the prefix with the smallest address wins.

Apply to this case:

Conflict: Two entries for 1.1.1.1/32 with SID 2 and SID 1.

SID 1 is lower, so 1.1.1.1/32 → SID 1 is selected.

Correct answer: D. 1.1.1.1/32 → SID 1