Huawei Updated H12-891_V1.0 Exam Questions and Answers by rahma

Before performing anetwork cutover (migration or upgrade), it is essential to collectbaseline datato ensure that services operate normally before and after the change.

Importance of Pre-Cutover Information Collection:

Identifies Network Baseline– Helps comparepre-cutover and post-cutover performance.

Detects Hidden Issues– Ensures that no existing network issues interfere with the cutover process.

Prevents Service Interruptions– Ensures all dependent services are accounted for.

Provides Rollback Plan– If issues arise, administrators canrestore previous configurations.

Reference from Huawei HCIE-Datacom Documentation:

Huawei Network Change Management Guide – Pre-Cutover & Post-Cutover Best Practices

HCIE-Datacom Training Material – Service Assurance & Risk Analysis

Comprehensive and Detailed In-Depth Explanation:

When configuring avirtualized campus networkoniMaster NCE-Campus, the platform supports automatic delivery of routing policies when connecting to external networks, including the Internet.

This feature ensures that traffic destined for external networks isautomatically directed to the appropriate egress points.

TheNCE-Campusautomatically creates and delivers thedefault routeor specific routes, depending on the network topology and configuration.

This simplifies network management by eliminating the need for manual route configuration on each device.

Therefore, the statement isTRUE.

BGP EVPN in VXLAN Tunneling

✅A. MP_REACH_NLRI is used to carry routing information.

MP_REACH_NLRI (Multiprotocol Reachable Network Layer Reachability Information)is used inBGP updatesto carryVXLAN reachability information.

✅B. Several BGP EVPN routes are defined through BGP extension.

BGP EVPN introduces multiple route types, such asType 2 (MAC/IP Advertisement), Type 3 (Inclusive Multicast), and Type 5 (IP Prefix Advertisement).

✅D. MP_REACH_NLRI is used to carry the RT.

RT (Route Target) defines route import/export policies in VPN environments.

MP_REACH_NLRI carries the RT attributein BGP EVPN updates.

❌Incorrect Answer:

❌C. MP_REACH_NLRI is used to carry the RD.

Wrong!TheRoute Distinguisher (RD)is carriedinside BGP attributes, but not in MP_REACH_NLRI.

Reference from Huawei HCIE-Datacom Documentation:

Huawei VXLAN BGP EVPN Configuration Guide – BGP EVPN Route Types

HCIE-Datacom Training Material – VXLAN Dynamic Tunnel Establishment