H12-831_V1.0 Exam Dumps : HCIP-Datacom-Advanced Routing & Switching Technology V1.0

Link-LSA (ID 0.0.0.4):This LSA is originated by each router to describe its link-local IPv6 address and prefixes.The value 0.0.0.4 maps to the interface on R1, which has Router ID 10.0.1.1.✅ So the origin router is 10.0.1.1.

Network-LSA (ID 0.0.0.5):This LSA is generated by the DR on the link. In the diagram, R4 (10.0.4.4) is connected to the shared network (GE0/0/1).✅ So the origin router is 10.0.4.4.

Inter-Area-Prefix-LSA (ID 0.0.0.1):This LSA is used to describe routes from other areas and is generated by an ABR.In this case, R3 (Router ID 10.0.3.3) acts as the ABR.✅ So the origin router is 10.0.3.3.

Intra-Area-Prefix-LSA (ID 0.0.0.2):This references a Network-LSA, and the reference type is 1 (Network-LSA).Since the Network-LSA (0.0.0.5) came from 10.0.4.4, this also must have been generated by R4.✅ So the origin router is 10.0.4.4.

✅ Final Answer Summary:

Number

Origin Router

1

10.0.1.1

2

10.0.4.4

3

10.0.3.3

4

10.0.4.4

Official Huawei Extract:

" Each router in OSPFv3 generates Link-LSAs for each interface. The DR generates Network-LSAs. ABRs generate Inter-Area LSAs, and the Intra-Area-Prefix LSA references either Router or Network LSAs depending on the link type. "

— [Huawei HCIA-Datacom OSPFv3 LSAs Section]

Comprehensive and Detailed In-Depth Explanation:

1. Understanding the Network Setup

PC1 (192.168.1.1/24) and PC2 (192.168.1.2/24) are connected to SW1.

Both PCs are in the same VLAN, meaning communication should work without routing.

If there is a communication failure, it could be due to physical, VLAN, ARP, or port security issues.

2. Evaluating Each Answer Option

Option A: " SW1’s GE0/0/2 is shut down. "

Correct.

If GE0/0/2 is shut down, PC2 cannot send or receive traffic, causing communication failure.

Even if PC1 is working, PC2 will be unreachable.

✅ A is a valid cause.

Option B: " The link of SW1’s GE0/0/1 is faulty. "

Correct.

If GE0/0/1 has a faulty link, PC1 cannot communicate with PC2, causing failure.

Even if PC2 is working, PC1 will be unreachable.

✅ B is a valid cause.

Option C: " Incorrect static ARP entries are configured on the hosts. "

Correct.

If static ARP entries are incorrectly configured, PCs will map the wrong MAC addresses to IPs.

This will result in packet delivery failures, even if the physical network is working.

✅ C is a valid cause.

Option D: " Port isolation is configured on SW1. "

Correct.

Port isolation (or private VLAN) prevents direct communication between specific ports.

If port isolation is enabled on GE0/0/1 and GE0/0/2, PC1 and PC2 will be unable to reach each other.

✅ D is a valid cause.

Final Answer:

✅ A, B, C, and D are correct.

HCIP-Datacom-Advanced Routing & Switching Technology References:

Troubleshooting VLAN and Layer 2 Communication Issues

Impact of Port Isolation and Private VLANs on Communication

Static ARP Entry Configuration and Its Effects on Network Connectivity