FEC (Forwarding Equivalence Class) in MPLS is a group of packets that are forwarded in the same manner. MPLS can classify packets into FECs based on factors such as:

Destination IP address

Source address

CoS (Class of Service)

Application type

However, Fragment Offset, which is part of the IP header used for IP fragmentation, is not used in FEC classification. Fragment offset is more relevant to how IP packets are reconstructed and not suitable or used as a classification standard for forwarding decisions in MPLS.

Exact Extract - Huawei HCIE-Datacom V1.0 MPLS Chapter:

“FEC classification may be based on various parameters including destination address, source address, and even CoS values. However, fragment offset is not used as an FEC criterion, as MPLS forwarding occurs before IP reassembly.”

In Huawei’s CloudCampus Solution, VNs (Virtual Networks) are isolated by default for security purposes. To enable inter-VN communication, you must explicitly configure policies that allow traffic between different VNs.

The correct way to control and enable this communication is via routing policies, especially inter-VN routing policies on the core or border nodes.

Static routes or OSPF deployments are not sufficient or appropriate for policy-controlled VN communication in this context.

Correct answer: D. Deploy a routing policy

Link-LSA (Type 8) in OSPFv3 performs the following:

Advertises the router’s link-local address to neighbors.

Advertises the router’s interface ID on the link.

Carries IPv6 prefixes associated with the interface (since Router LSA no longer does this in OSPFv3).

The Options field in Link-LSA contains capabilities of the originating router, not the options from Network-LSA.

So, Option D is incorrect — the Link-LSA does not advertise options from the Network-LSA.

Correct answer: D

Virtual Networks in Huawei CloudCampus Solution:

Virtual networks (VNs) are segmented based on services (e.g., IoT, Guest Wi-Fi, Enterprise Wi-Fi).

Each VN has its own routing and forwarding instance (VRF).

Isolation Between Virtual Networks:

By default, different virtual networks are isolated.

If inter-VN communication is required, it must be manually configured using policy-based routing (PBR), inter-VRF routing, or firewall policies.

Reference from Huawei HCIE-Datacom Documentation:

Huawei CloudCampus Solution Guide – Virtual Networks and Segmentation

HCIE-Datacom Training Material – Policy-Based Inter-VN Communication

In Huawei’s VXLAN implementation, the typical mapping between VNIs (VXLAN Network Identifiers) and BDs (Bridge Domains) is:

1:1 mapping — each VNI is uniquely associated with a single bridge domain.

This allows proper MAC learning and forwarding in the data plane for isolated tenant traffic.

Other mappings (N:1, 1:N, N:M) may be technically possible but not recommended or supported in most enterprise deployments.

Correct answer: B. 1:1

Comprehensive and Detailed In-Depth Explanation:

The IP prefix list configuration:

ip ip-prefix TEST permit 10.0.0.0 24 less-equal 30

10.0.0.0/24: Matches because it falls within the 10.0.0.0/24 prefix with the same prefix length (24).

10.0.1.0/24: Matches because it also falls within the /24 network range.

10.0.2.0/24: Matches for the same reason as the above.

10.0.0.1/30: Matches because it falls within the /24 prefix and its subnet length (30) is within the less-equal 30 range.

The prefix list permits any route that falls within the 10.0.0.0/24 network with a subnet mask ranging from /24 to /30. Therefore, all given routes are matched.

IS-IS Multi-Process:

Huawei devices support running multiple IS-IS processes simultaneously.

These processes are completely independent of one another: different LSDBs, interfaces, routing tables, etc.

Each process can be associated with a separate VPN instance, and a single VPN instance can be served by multiple IS-IS processes.

IS-IS Multi-Instance:

One IS-IS process can run multiple instances, typically used for multi-VPN scenarios.

However, Huawei ' s current implementation prefers one VPN per process for clarity and control.

Based on Huawei’s design:

A is incorrect — an IS-IS process can serve multiple VPNs in other vendors, but Huawei typically uses one process per VPN for clean separation.

B is correct — a VPN instance can be associated with multiple IS-IS processes.

C is incorrect in Huawei implementation context.

D is correct — IS-IS processes are independent.

Correct answers: B, D