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

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

Comprehensive and Detailed In-Depth Explanation:

An NVE (Network Virtualization Edge) interface is responsible for connecting physical or virtual devices to a VXLAN network. It functions as the VTEP (VXLAN Tunnel Endpoint) and supports encapsulation and decapsulation of VXLAN packets.

Layer 2 VXLAN gateway (D) is used for intra-subnet communication, but the NVE interface is the actual point where traffic enters the VXLAN network.

Layer 3 VXLAN gateway (A) is used for inter-subnet communication.

VLANIF interface (C) is used for VLAN-based communication, not directly for VXLAN.

Therefore, the NVE interface (B) is the correct answer as it serves as the traffic ingress and egress point for the VXLAN network.

Comprehensive and Detailed In-Depth Explanation:

In the inter-AS MPLS VPN Option B solution:

Option B establishes a multi-hop eBGP connection between the ASBRs (ASBR-PE1 and ASBR-PE2) to exchange VPNv4 routes.

In this setup, the ASBRs exchange labeled VPNv4 routes via MP-BGP (Multiprotocol BGP).

The command:

[ASBR-PE1-bgp-af-vpnv4] undo peer 10.0.34.4 enable

is used to disable VPNv4 route exchange between the ASBR-PE1 and ASBR-PE2.

If this command is executed, ASBR-PE1 will not transmit VPNv4 routes to ASBR-PE2, breaking the inter-AS VPN connectivity.

Therefore, the statement is FALSE because ASBR-PE1 and ASBR-PE2 must exchange VPNv4 routes to maintain connectivity between the VPN sites across different ASes.