Huawei : H12-831_V1.0 Questions & Answers
Updated: Sep 23, 2026
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Huawei H12-831_V1.0 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Network Cutover | 7% | - Post-cutover validation - Implementation and rollback strategy - Cutover planning and risk assessment - Pre-cutover verification |
| Topic 2: Network Troubleshooting | 10% | - Structured troubleshooting methodology - Switching and link fault handling - Routing protocol fault diagnosis - Performance and service fault resolution |
| Topic 3: MPLS Technologies | 19% | - MPLS VPN (L3VPN, L2VPN) - MPLS fundamentals and label distribution - LDP and RSVP-TE protocols - MPLS OAM and protection |
| Topic 4: Network O&M | 7% | - Routine maintenance procedures - Log and alarm management - Configuration management and backup - Network monitoring and performance analysis |
| Topic 5: Advanced BGP Features | 10% | - BGP multi-homing and load balancing - Route reflectors and confederations - BGP route selection and attributes - Routing policies and filtering |
| Topic 6: Advanced Ethernet Technologies | 10% | - VLAN aggregation and MUX VLAN - Ethernet link aggregation and reliability - Port isolation and security features - QinQ and VLAN mapping |
| Topic 7: Advanced IGP Features | 17% | - OSPF advanced features
|
| Topic 8: IPv6 Routing | 20% | - OSPFv3 and IS-IS for IPv6 - BGP4+ for IPv6 - IPv6 address planning and configuration - Transition mechanisms (dual-stack, tunnel, translation) |
Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Sample Questions:
The figure shows the Router-LSA generated by a router. Which of the following statements are true based on the LSA?
- A. At least one interface on the router belongs to area 0.
- B. At least one interface on the router belongs to a stub area.
- C. The router is an ABR.
- D. The router is an ASBR.
Correct Answer: A,C 🗳️
On the network shown in the figure, IS-IS IPv6 runs on R2, R6, and R3, and the IPv6 address of Loopback0 on R6 is 2000::6/128. OSPFv3 runs on other links. Area 1 is a stub area, and area 2 is an NSSA. IS-IS routes are imported to OSPFv3 on R2 and R3. Which of the following statements are true?
- A. The routing table of R1 contains the route 2000::6/128.
- B. The routing table of R6 contains the route ::/0.
- C. The routing table of R4 contains the route 2000::6/128.
- D. The routing table of R5 contains the route 2000::6/128.
Correct Answer: A,C,D 🗳️
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On a stable network that requires fast route convergence, you can change the value of the interval at which OSPF LSAs are updated to 0 so that topology or route changes can be immediately advertised on the network through LSAs, which speeds up route convergence.
- A. FALSE
- B. TRUE
Correct Answer: B 🗳️
The device operating environment is crucial for stable device operating, including the equipment room, power supply, and heat dissipation. Maintenance personnel must be on site to maintain the device operating environment.
- A. FALSE
- B. TRUE
Correct Answer: A 🗳️
On the OSPF network shown in the figure, drag the values on the left to the correct positions so that:
* Traffic from PC1 to PC2 follows the path: PC1 - > R1 - > R3 - > R2 - > PC2
* Traffic from PC2 to PC1 follows the path: PC2 - > R2 - > R1 - > PC1
Which of the following OSPF cost values should be assigned to Cost-A, Cost-B, and Cost-C to achieve this routing behavior?
Correct Answer:
Explanation:
* A = 50
* B = 10
* C = 20
Comprehensive and Detailed In-Depth Explanation:
Understanding OSPF Path Selection and Cost Calculation:
* OSPF selects the shortest path (lowest cost) to the destination.
* The OSPF cost is determined by the cumulative sum of interface costs along a path .
* By assigning specific costs to A, B, and C , we can influence OSPF's path selection to meet the desired routing behavior.
Step-by-Step Analysis of Required Traffic Flow:
1. Traffic from PC1 to PC2 must take the route:
PC1 - > R1 - > R3 - > R2 - > PC2
* To force traffic through R3 , the cost of the direct link R1 - > R2 (Cost-A) must be higher than the alternative path via R3 .
* We assign Cost-A = 50 (high cost) to discourage direct routing from R1 - > R2 .
* The cost of R1 - > R3 (Cost-C) should be lower , so we assign Cost-C = 20 .
* The cost of R3 - > R2 (default Cost-20) remains unchanged.
* Total cost via R3: 20 (R1- > R3) + 20 (R3- > R2) = 40 , which is less than the direct link of 50 , so OSPF prefers this path.
# Traffic follows: PC1 - > R1 - > R3 - > R2 - > PC2
2. Traffic from PC2 to PC1 must take the route:
PC2 - > R2 - > R1 - > PC1
* We need to make R2 - > R1 (Cost-B) the best (lowest cost) route for return traffic .
* Assign Cost-B = 10 (low cost).
* This ensures that R2 prefers the direct path R2 - > R1 instead of R2 - > R3 - > R1 (which costs
20+20=40).
# Traffic follows: PC2 - > R2 - > R1 - > PC1
Final Cost Assignments for Correct Routing Behavior:
Cost
Assigned Value
Reason
Cost-A (R1 - > R2)
50
High to discourage direct R1- > R2 routing
Cost-B (R2 - > R1)
10
Low to ensure PC2- > PC1 prefers direct R2- > R1
Cost-C (R1 - > R3)
20
Medium to encourage R1- > R3- > R2 path
Key Takeaways:
* Higher OSPF cost discourages path selection.
* Lower OSPF cost encourages path selection.
* By manipulating OSPF cost values, we achieve asymmetric routing between PC1 and PC2.
* This aligns with OSPF path selection principles covered in HCIP-Datacom certification.
HCIP-Datacom-Advanced Routing & Switching Technology References:
* Huawei HCIP-Datacom Official Certification Guide , Chapter on OSPF Cost Calculation and Path Selection .
* Huawei Enterprise Networking Training Materials , OSPF Path Optimization Techniques.
* Huawei Datacom Configuration Guide , OSPF Cost and Traffic Engineering.
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