H12-831_V1.0 Dumps with Practice Exam Questions Answers

???? Key Observations:

R1 and R4 both import the static route 192.168.1.0/24 into BGP.

R1 tags the route with community 1:1, and all routers transmit community attributes.

R2 and R3 have policies to reject routes containing 1:1.

R4 does NOT tag the route with 1:1, so its advertisement is accepted.

???? Behavior Breakdown:

✅ R1 sends the route with community 1:1 to R2 → R2 rejects it.

✅ R2 does not propagate R1 ' s route to R3 (rejected by policy).

✅ R4 sends the route without 1:1 to R2.

✅ R2 accepts R4 ' s route and forwards it to R3.

✅ R3 receives a clean route via R2 → R4 and installs it.

???? Path followed:

R3 → R2 → R4 → 192.168.1.0/24

✅ Final Answer: B. R3 → R2 → R4

Official Huawei Extract:

" BGP community attributes can be used to mark routes and influence routing decisions through routing policies. If a router is configured to deny routes with a specific community, it will not install or forward such routes. Routes received without the blocked community tag will be accepted and used. "

— [Huawei HCIA-Datacom Certification Guide – BGP Community Attribute and Routing Policy Section]

Huawei BGP AS_PATH filters use regular expressions to match autonomous system sequences contained in BGP routing updates.

Option A uses 00$, which matches an AS_PATH ending in 00. The provided path ends in AS 300, so the expression matches.

Option B uses .*, which matches any sequence of characters, including the entire AS_PATH. Consequently, this expression would deny all matching BGP routes.

Option C matches the substring 200, which appears in the middle of the AS_PATH.

Option D uses 00.*30, which matches a sequence beginning with 00, followed by any number of characters, and subsequently 30. The supplied AS_PATH satisfies this expression.

All four expressions match the specified path and can deny it. However, option B is excessively broad for selective production filtering.

HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Training Material.pdf

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VLAN aggregation and MUX VLAN provide different networking functions and use distinct VLAN roles.

VLAN aggregation combines multiple sub-VLANs under a super-VLAN. The sub-VLANs share the IP subnet and default gateway of the super-VLAN, reducing IP address consumption.

MUX VLAN controls Layer 2 communication using principal, group, and separate VLANs. It allows administrators to restrict communication among hosts while maintaining access to designated resources.

However, Huawei ' s MUX VLAN configuration requirements explicitly prohibit using the VLAN ID of a principal VLAN as a super-VLAN or sub-VLAN.

Consequently, an administrator cannot assign the same VLAN ID simultaneously to a super-VLAN and the principal MUX VLAN.

Separate VLAN identifiers must be allocated for the relevant VLAN functions to avoid configuration conflicts.

Therefore, the statement is FALSE.

HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Training Material.pdf

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Yes, this is true. In OSPFv3:

Each router generates one Link-LSA per link.

The Link-LSA contains:

The router ' s link-local address

IPv6 prefixes associated with the interface

Options that are advertised to neighbors on the same link

It is not flooded throughout the OSPF area; it is only sent on the local link (similar to a Hello packet ' s behavior).

✅ Official Reference from Huawei:

" Each router sends a Link-LSA on every attached link. This LSA is not flooded beyond the link and includes link-local address, prefix list, and interface options. "

— [Huawei HCIA-Datacom OSPFv3 Chapter – LSA Types]

Comprehensive and Detailed In-Depth Explanation:

To determine whether the statement is true or false, we need to analyze the OSPFv3 topology, the role of area types, and the behavior of Inter-Area-Prefix-LSAs. Let’s break it down step by step:

Understanding the OSPFv3 Topology and Area Types:

The figure shows three routers (R1, R2, and R3) connected in an OSPFv3 network. R1 and R2 are in Area 0 (the backbone area), while R2 and R3 are in Area 1 (a common area, also known as a standard or regular area).

R2 is an Area Border Router (ABR) because it connects Area 0 and Area 1. ABRs are responsible for summarizing and advertising routes between areas.

What is a Common Area in OSPFv3?:

A " common area " in OSPFv3 refers to a standard or regular OSPF area, as opposed to special areas like Stub, Totally Stubby, Not-So-Stubby Area (NSSA), or Totally NSSA. Common areas allow all types of LSAs, including inter-area, intra-area, and external LSAs, to be flooded within the area, except for restrictions in special area types.

Since Area 1 is described as a " common area, " it behaves like a standard OSPF area, allowing the full exchange of LSAs, including Inter-Area-Prefix-LSAs.

Role of Inter-Area-Prefix-LSA (Type 3 LSA in OSPFv3):

Inter-Area-Prefix-LSAs (Type 3 LSAs in OSPFv3) are used by ABRs to advertise prefixes from one area to another. These LSAs are critical for inter-area routing, allowing routers in one area to learn about networks in other areas.

In this case, R2, as an ABR, generates Inter-Area-Prefix-LSAs to describe routes (network segments) in Area 1 and advertises them into Area 0. Conversely, R2 also receives Inter-Area-Prefix-LSAs from Area 0 (via R1) and advertises them into Area 1.

Does the Inter-Area-Prefix-LSA Exist in Both Area 0 and Area 1?:

Yes, Inter-Area-Prefix-LSAs exist in both areas because R2, as an ABR, floods these LSAs into both Area 0 and Area 1. Specifically:

R2 generates Inter-Area-Prefix-LSAs for network segments in Area 1 and advertises them into Area 0, where R1 (in Area 0) can receive and process them.

Similarly, R2 receives Inter-Area-Prefix-LSAs for network segments in Area 0 (from R1) and advertises them into Area 1, where R3 (in Area 1) can receive and process them.

Since Area 1 is a common area (not a stub or NSSA), it allows Inter-Area-Prefix-LSAs to be flooded within the area, ensuring that routers like R3 can learn about routes in Area 0, and routers like R1 can learn about routes in Area 1.

Verifying the Statement:

The statement claims that R2 generates an Inter-Area-Prefix-LSA to describe the routes of a network segment in Area 1, and such an LSA exists in both Area 0 and Area 1. This is accurate because:

R2, as an ABR, generates Inter-Area-Prefix-LSAs for Area 1’s network segments and floods them into Area 0.

R2 also receives and floods Inter-Area-Prefix-LSAs from Area 0 into Area 1.

Therefore, Inter-Area-Prefix-LSAs describing routes in Area 1 exist in both Area 0 and Area 1, making the statement true.

Conclusion:

The statement is true because Inter-Area-Prefix-LSAs generated by R2 for Area 1’s network segments are flooded into both Area 0 and Area 1, and Area 1, being a common area, allows these LSAs to exist within it.

References to HCIP-Datacom-Advanced Routing & Switching Technology Documents:

HCIP-Datacom-Advanced Routing & Switching Technology V1.0, Section on OSPFv3: OSPF Area Types, Inter-Area Routing, and LSA Types (specifically Inter-Area-Prefix-LSA, Type 3 LSA).

HCIP-Datacom-Advanced Routing & Switching Technology V1.0, Chapter on OSPF Routing Protocols: ABR Behavior, Common Areas, and LSA Flooding Mechanisms.