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

 Network cable → Use a tester to check connectivity.

 Device version file → Check the size of the software package and check whether the file matches the device model.

 Board → Install the board on a device that is not connected to the network and observe the running status of the device.

 License → Check whether the license is in the validity period to prevent device functions from being affected.

 Migration personnel list → Check whether responsibilities and permissions are clearly assigned.

Comprehensive and Detailed In-Depth Explanation:

1. Network Cable - Connectivity Testing:

Before starting a migration project, all network cables should be tested for physical connectivity issues.

Network testers can be used to detect any breaks, shorts, or incorrect wiring.

Ensuring proper connectivity avoids delays and troubleshooting issues during the migration.

2. Device Version File - Software Compatibility Check:

Firmware and software versions must be verified before upgrading or migrating network devices.

The device version file should match the model and hardware specifications to avoid compatibility issues.

If incorrect software is used, the device may not function properly or could become inoperable.

3. Board - Installation and Hardware Verification:

Before installing new hardware modules (boards, line cards, etc.) into a production environment, they should be tested in isolation.

Testing ensures the board is operational and does not introduce faults into the system.

If a board is faulty, it can cause device failure or unexpected behavior in the migration.

4. License - Validity and Activation Check:

Some network devices require licenses for full functionality (e.g., advanced routing, security features).

If a license is expired or missing, critical functions may be disabled after migration.

Checking license status in advance prevents unexpected downtime or service disruptions.

5. Migration Personnel List - Roles and Responsibilities Assignment:

Large network migrations require clear responsibility assignments for each team member.

A migration personnel list ensures that everyone knows their role, tasks, and permissions.

Proper coordination avoids miscommunication, errors, and project delays.

Key Takeaways:

✅ Network cables should be tested for connectivity.✅ Software versions should match the hardware model to prevent incompatibility.✅ Hardware boards should be tested before installing into production.✅ Licenses should be verified to prevent service disruptions.✅ Migration personnel roles should be clearly defined for smooth execution.

HCIP-Datacom-Advanced Routing & Switching Technology References:

Huawei HCIP-Datacom Official Certification Guide, Chapter on Network Migration Best Practices.

Huawei Enterprise Networking Whitepapers, Guidelines on Software & Hardware Pre-checks for Migration.

Huawei Technical Documentation, License Management in Huawei Datacom Devices.

Comprehensive and Detailed In-Depth Explanation:

1. Understanding the Network Setup

PE1 (Provider Edge 1) is the gateway for network 192.168.1.1/24.

PE2 (Provider Edge 2) is the gateway for network 192.168.2.1/24.

A cloud-based backbone connects PE1 and PE2.

To verify end-to-end communication, engineers need to check reachability between PE1 and PE2.

2. Evaluating Each Answer Option

Option A: "Configuring NQA on PE1 and PE2, with the destination address being the IP address of each other."

✅ Correct.

NQA (Network Quality Analysis) is a network testing tool that allows connectivity testing between two devices.

Configuring NQA between PE1 and PE2 will verify end-to-end reachability.

Option B: "On PE1 and PE2, checking whether the ARP table contains the ARP entry of the peer network segment."

❌ Incorrect.

ARP (Address Resolution Protocol) is only used for resolving MAC addresses within the same broadcast domain.

Since PE1 and PE2 are in different network segments (separated by a routed network), they will not have ARP entries for each other.

Instead, routing entries should be checked, not ARP.

Option C: "On PE1, using 192.168.1.1 as the source address to ping 192.168.2.1."

✅ Correct.

A simple ping test using the source address of PE1 (192.168.1.1) to reach PE2 (192.168.2.1) will verify whether routing between the two locations is functional.

Option D: "On PE1 and PE2, checking whether there are routes to each other’s network segment in the routing tables."

✅ Correct.

If routing is not configured correctly, PE1 and PE2 will not know how to reach each other.

Checking the routing table ensures that both PEs have the correct next-hop information.

Final Answer:

✅ A, C, and D are correct.

HCIP-Datacom-Advanced Routing & Switching Technology References:

Using NQA for Network Connectivity Testing

Verifying Routing Table Entries for Inter-Network Communication

Understanding ARP and Its Limitations in Routed Networks

Comprehensive and Detailed In-Depth Explanation:

Step 1: Identify the Primary Path

The shortest OSPF cost to 10.0.3.3/32 from R1 is through R5:

R1 → R5 (Cost 10) → R3 (Cost 10) = Total Cost 20

The primary outbound interface from R1 to R5 is GE0/0/1.

Step 2: Identify the Backup Path (OSPF IP FRR & ECMP)

OSPF IP Fast Reroute (FRR) provides a backup next-hop in case the primary link (R1 → R5) fails.

A feasible backup path must have a cost equal to or close to the primary path, but it must avoid the same failure point.

Alternative Path Calculation:

Path 1 (R1 → R2 → R3)

R1 → R2 (Cost 10), R2 → R3 (Cost 10) → Total Cost = 20 ✅

Uses interface GE0/0/2 on R1.

Path 2 (R1 → R4 → R3)

R1 → R4 (Cost 10), R4 → R3 (Cost 10) → Total Cost = 20 ✅

Uses interface GE0/0/3 on R1.

Final Decision on the Backup Interface

Since both paths R1 → R2 → R3 and R1 → R4 → R3 have equal costs, either can be used for backup.

However, R1 → R2 → R3 shares a direct cost path with R5, meaning it may not be preferred as a full FRR backup.

The best backup outbound interface in this scenario is GE0/0/3 (R1 → R4 → R3).

Final Answer: ✅ C (GE0/0/3)

References:

HCIP-Datacom-Advanced Routing & Switching Technology V1.0 – OSPF IP FRR (Fast Reroute) Mechanism

OSPF Equal-Cost Multi-Path (ECMP) and Backup Route Selection

OSPF Route Calculation and Best-Path Selection