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:

To verify the correct answers, let's analyze how BGP/MPLS IP VPN is used for secure communication and isolation in an enterprise network.

1. Understanding BGP/MPLS IP VPN Concepts

MPLS VPN (Multiprotocol Label Switching Virtual Private Network) is used to:

Allow communication between specific sites by using Route Targets (RTs).

Ensure isolation of specific areas (e.g., R&D vs. non-R&D) by controlling RT import/export policies.

Utilize Route Distinguisher (RD) to make overlapping IP addresses unique within the VPN.

2. Analyzing the Answer Choices

✅ A. "To enable communication between the headquarters and branch R&D areas, both the ERT and IRT of VPN1 and VPN2 can be set to 100:100." → TRUE

Explanation:

ERT (Export Route Target) and IRT (Import Route Target) define which VPNs share routing information.

If VPN1 (HQ R&D) and VPN2 (Branch R&D) use the same RT (100:100), they will exchange routes, enabling communication.

Correct configuration:

VPN1: ERT 100:100, IRT 100:100

VPN2: ERT 100:100, IRT 100:100

✅ This is correct and enables communication between HQ and branch R&D areas.

❌ B. "To implement communication between the headquarters and branch R&D areas, the RDs of VPN1 and VPN2 need to be set to the same value." → FALSE

Explanation:

RD (Route Distinguisher) is only used to make overlapping IP addresses unique within the MPLS VPN.

RD does NOT control route exchange between VPNs (RTs control route exchange).

VPN1 and VPN2 can have different RDs but still communicate if they share the same RT (100:100).

✅ RDs do NOT need to be the same for VPNs to communicate.

❌ This statement is false.

❌ C. "R&D areas and non-R&D areas have overlapping address spaces. Therefore, services in the two areas cannot be isolated." → FALSE

Explanation:

Overlapping address spaces are common in MPLS VPNs and can be isolated using unique Route Targets (RTs).

As long as VPNs have different RTs, their traffic remains isolated.

For example:

VPN1 (R&D): RT 100:100

VPN3 (non-R&D): RT 200:200

Even with overlapping IPs, R&D and non-R&D areas are completely isolated.

❌ This statement is false.

✅ D. "To isolate R&D areas from non-R&D areas at the headquarters, the RTs of VPN1 can all be set to 100:100 and the RTs of VPN3 can all be set to 200:200." → TRUE

Explanation:

Setting different RTs for R&D (100:100) and non-R&D (200:200) ensures complete isolation.

Correct configuration:

VPN1 (R&D): RT 100:100

VPN3 (non-R&D): RT 200:200

Since VPN1 and VPN3 do NOT share the same RTs, their routes remain separate.

✅ This ensures isolation between R&D and non-R&D areas.

Restrict → Discards the packets that trigger static MAC address flapping and reports an alarm.

Protect → Discards the packets that trigger static MAC address flapping only and does not report an alarm.

Shutdown → Sets the interface state to error-down and reports an alarm.

Comprehensive and Detailed In-Depth Explanation:

1. Understanding Port Security Modes

Port security is used to control access on a switch port based on MAC addresses. If a MAC address violation occurs (e.g., static MAC address flapping), the switch can take different actions based on the configured security mode.

Security Mode

Description

Restrict

Drops the violating packets and logs the violation by generating an alarm.

Protect

Drops the violating packets but does not generate an alarm.

Shutdown

Places the interface into error-disabled (error-down) state and logs an alarm.

2. Matching Each Security Mode with Its Operation

Protect Mode:

The switch drops the packets from the unauthorized MAC address.

No alarm is generated or logged.

Correct Mapping: "Discards the packets that trigger static MAC address flapping only and does not report an alarm."

Restrict Mode:

The switch drops the packets from the unauthorized MAC address.

An alarm is generated and logged in the system.

Correct Mapping: "Discards the packets that trigger static MAC address flapping and reports an alarm."

Shutdown Mode:

The switch shuts down the interface by placing it into the error-down state.

An alarm is generated and logged.

Correct Mapping: "Sets the interface state to error-down and reports an alarm."