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  1. Home
  2. Huawei Certification
  3. H12-891_V1.0 Exam
  4. Huawei.H12-891_V1.0.v2026-06-05.q295 Dumps
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Question 196

The path of an SR-MPLS TE tunnel can be calculated by the controller or tunnel ingress.

Correct Answer: A
Understanding SR-MPLS TE (Segment Routing MPLS Traffic Engineering)
# What is SR-MPLS TE?
Segment Routing (SR) replaces traditional MPLS LDP/RSVP-TE signaling.
UsesSR-TE policiesto define network pathswithout requiring per-flow state on intermediate routers.
# How is the SR-MPLS TE Path Calculated?
#By the SDN Controller (Centralized Path Computation)
The controller (e.g.,Huawei iMaster NCE) calculates theoptimal SR pathbased on:
Bandwidth requirements
Latency constraints
Traffic policies
The controllerthen delivers the SR policy to the ingress router.
#By the Ingress Router (Distributed Path Computation)
Theingress routercomputes theSR path dynamicallybased onlocal constraints.
This method is usefulwhen no centralized controller is available.
Why is the Answer TRUE?
#Both centralized (controller-based) and distributed (ingress router-based) path computation are supported in SR-MPLS TE.
Real-World Application:
5G and Cloud WANs:Centralized path optimizationreduces congestion dynamically.
Enterprise Networks:Local path computation ensuresfast rerouting in case of failures.
#Reference:Huawei HCIE-Datacom Guide - SR-MPLS TE and Path Computation Methods
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Question 197

SR-MPLS uses the MPLS forwarding plane, and therefore requires MPLS to be enabled. Which of the following conditions must be met for MPLS to be automatically enabled on an interface? (Select all that apply)

Correct Answer: B,D
To automatically enable MPLS on an interface in SR-MPLS:
Segment routing must be enabled globally in the system view → ✅
Segment routing must also be enabled under the IGP process, and IGP (OSPF or IS-IS) must be enabled on the interface → ✅ Clarifications:
SRGB (Segment Routing Global Block) configuration defines SID ranges but does not trigger MPLS enablement → ❌ Static adjacency labels are advanced options and do not auto-enable MPLS → ❌ Correct answers: B, D
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Question 198

The IS-IS Level-1 neighbor relationship is not established between R3 and R4. Referring to the following information, what is the possible cause?

Correct Answer: D
From the IS-IS error output, the key error is:
Mismatched Area Addr(L1): 13
This clearly indicates that the area addresses are different, which prevents the Level-1 adjacency from forming.
Why is Option D Correct?
* IS-IS Level-1 routers must have the same area ID to form an adjacency.
* Since the log shows a mismatched area address, the adjacency fails at Level-1.
* If R3 and R4 were Level-2 routers, they could form an adjacency even with different area IDs.
Why Are the Other Options Incorrect?
# Option A: No authentication failure is reported.# Option B: No "Mismatched Level" errors appear, so their levels are compatible.# Option C: No "Bad Circuit Type" errors indicate mismatched circuit types.
Thus, the correct answer is D.
# Reference: Huawei HCIE Datacom - IS-IS Neighbor Troubleshooting
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Question 199

When there are multiple redundant links in an IS-IS network, multiple equivalent routes may occur. Regarding equivalent routing within an IS-IS network, which of the following descriptions is wrong?

Correct Answer: B
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Question 200

Huawei Open Programmability System (OPS) uses HTTP methods to access managed objects to manage network devices. To facilitate script compilation, Huawei OPS provides the Python script template. In the Python script template, what are the contents of the Content-type and Accept fields in the header of an HTTP request packet?

Correct Answer: B
Huawei Open Programmability System (OPS) and HTTP Request Headers
Huawei OPS allows network automation and programmability through HTTP-based APIs. When using Python scripts to send HTTP requests to network devices, the request headers must specify the content format for data exchange.
# B. Content-Type: text/json, Accept: text/json (Correct Answer)
* Content-Type: text/json # Specifies that the request body contains JSON-formatted data.
* Accept: text/json # Specifies that the response should be in JSON format.
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