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

The incorrect statement is Option C, which says “A site can only belong to only one VPN.” This is false because a single site can belong to multiple VPNs if needed. For example, in some enterprise designs, a site may be part of both the Finance VPN and the Management VPN by configuring multiple routing instances (VRFs) and policies accordingly.

Exact Extract - HCIE-Datacom VPN Technologies Chapter:

“A site may be associated with one or more VPNs, depending on business requirements. This is achieved through VRF and route-target configurations.”

In OSPF:

An NSSA (Not-So-Stubby Area) allows external route injection via Type 7 LSAs.

These Type 7 LSAs are generated by ASBRs inside the NSSA (R4 in this case) when external or direct routes are imported.

ABRs (such as R2) between the NSSA and backbone translate Type 7 LSAs into Type 5 LSAs for flooding into other areas.

Clarification of options:

A: Incorrect — default route is not involved here; it ' s a specific route (10.1.4.4/32).

B: Correct — R2 translates Type 7 LSAs into Type 5.

C: Incorrect — default route is not being advertised.

D: Correct — R4 imports a direct route and generates Type 7 LSAs for it.

Correct answers: B, D

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 in BGP updates to carry VXLAN reachability information.

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

BGP EVPN introduces multiple route types, such as Type 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 attribute in BGP EVPN updates.

❌ Incorrect Answer:

❌ C. MP_REACH_NLRI is used to carry the RD.

Wrong! The Route Distinguisher (RD) is carried inside 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