VXLAN networkssuffer from ARP floodingbecause ARP requests arebroadcasted across all VTEPsin a Layer 2 domain. Toreduce ARP flooding, the following mechanisms can be enabled:

✅A. Local Proxy ARP

Allows the local VTEP to respond to ARP requests without forwarding them across the VXLAN network.

The VTEPcaches MAC-IP mappingsand replies directly to ARP requests, reducing unnecessary flooding.

✅B. ARP Broadcast Suppression

Converts ARP broadcast packets into unicast or multicast packetsto minimize network-wide flooding.

✅C. Host Information Collection

Collects and stores MAC-IP bindings of endpoints, which can be used by proxy ARP to reduce flooding.

Incorrect Answer:

❌D. Port Isolation

Port isolation prevents communication between devices within the same VLANbut doesnot help reduce ARP floodingbetween VTEPs.

Reference from Huawei HCIE-Datacom Documentation:

Huawei VXLAN Configuration Guide – ARP Optimization Techniques

HCIE-Datacom Training Material – Reducing ARP Broadcasts in VXLAN Networks

IS-IS Multi-Process:

Huawei devices support runningmultiple IS-IS processes simultaneously.

These processes arecompletely independentof one another: different LSDBs, interfaces, routing tables, etc.

Each process can be associated with aseparate VPN instance, and asingle VPN instance can be served by multiple IS-IS processes.

IS-IS Multi-Instance:

One IS-IS process canrun multiple instances, typically used formulti-VPN scenarios.

However, Huawei's current implementation prefersone VPN per processfor clarity and control.

Based on Huawei’s design:

Ais incorrect — an IS-IS processcanserve multiple VPNs in other vendors, but Huawei typically uses one process per VPN for clean separation.

Bis correct — a VPN instance can be associated withmultiple IS-IS processes.

Cis incorrect in Huawei implementation context.

Dis correct —IS-IS processes are independent.

Correct answers: B, D

Huawei AR routers used as egress gateways in CloudCampus solutions support multiple onboarding and deployment methods, including:

DHCP Option 148-based auto-deployment

Web-based management

CLI-based deployment and configuration (also supported)

So, the statement is incorrect—CLI-based deployment is supported.

Exact Extract - Huawei CloudCampus AR Router Deployment Guide:

“AR series routers support multiple deployment methods including CLI, DHCP Option 148, and web-based registration.”

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.

✅A. encoding: indicates the character set encoding format. Currently, only UTF-8 encoding is supported.

UTF-8 is the default and only supported character encoding in NETCONF XML.

✅B. /: indicates the end of the current tag.

In XML, closes an element, defining the end of a structure.

✅C.

The

✅D. ?>: indicates the end of an instruction.

Closes theXML declaration.

Reference from Huawei HCIE-Datacom Documentation:

Huawei NETCONF Development Guide – XML Formatting Rules

HCIE-Datacom Training Material – Understanding XML in Network Automation

IS-IS (Intermediate System to Intermediate System) protocolhas a limit on the size ofLink-State PDUs (LSPs).

Why Fragmentation?

LSPs contain routing and topology information.

If the LSPexceeds the maximum size, fragmentationallows the device to store and forward more routesby breaking them into smaller LSPs.

Key Point:IS-ISfragmentation is essentialin large-scale networks where routing tables grow beyond the default LSP size limit.

✅Reference:Huawei HCIE-Datacom Guide - IS-IS Protocol and Route Scaling