H12-891_V1.0 Exam Dumps : HCIE-Datacom V1.0

Intra-Area-Prefix-LSA (Type 9) is used in OSPFv3 to carry IPv6 prefix information for a router or network and is flooded within the area.

Link-LSA (Type 8) is only sent on the local link and is not flooded throughout the area.

Inter-Area-Prefix-LSA (Type 3) and Inter-Area-Router-LSA (Type 4) are also flooded within an area but originate from ABRs, typically for cross-area route advertisement.

That said, Intra-Area-Prefix-LSA is specifically flooded within an area, matching the context of the question directly.

Exact Extract - Huawei HCIE-Datacom OSPFv3 Module:

“Intra-Area-Prefix-LSAs are flooded within the area and advertise the IPv6 prefixes associated with router and network LSAs.”

The MPLS header consists of:

Label (20 bits) – Label value used for forwarding.

EXP (3 bits) – QoS field (Class of Service).

S bit (1 bit) – Bottom-of-Stack indicator.

TTL (8 bits) – Time-to-Live, similar to the TTL field in the IP header.

Function of TTL in MPLS:

It is used to prevent infinite loops.

Every LSR decrements the TTL by 1.

When TTL reaches 0, the packet is discarded.

This mirrors the behavior of IP TTL and ensures loop prevention in MPLS networks.

Correct answer: D. This field is used to prevent packet forwarding loops, similar to the TTL field in an IP header.

In MPLS LDP, there are two types of sessions:

Direct LDP sessions: Established between directly connected LSRs using LDP Hellos over a link.

Remote LDP sessions (also called targeted LDP sessions): Established between non-directly connected LSRs. These require manual configuration of the remote peer.

In this scenario, SWA and SWC are not directly connected, so a remote (targeted) LDP session must be set up.

For a remote LDP session:

You must configure the remote peer using the command:

[SWA-MPLS-LDP] targeted-peer x.x.x.x

Where x.x.x.x is the LSR ID of SWC (33.3.3.3 in this case).

The current configuration does not include this required step.

Thus, the correct statement is:

D. You need to create a remote peer and specify an LSR ID for the remote peer.