Huawei H12-891_V1.0 Exam With Confidence Using Practice Dumps

In OSPFv3, Link-LSA (Type 8) is generated by a router for each of its interfaces to advertise:

The router ' s link-local address on that interface.

The IPv6 prefixes associated with the interface.

Flags and options, such as router priority or loopback indicators.

From the output:

Link-LSA (Interface GigabitEthernet0/0/0)

Originating Router: 10.1.2.2

Link-Local Address: FE80::2E0:FCFF:FECD:4F79

Prefix: 2001:DB8:2345:23::/64

A. The link-local address of R2’s GE0/0/0 is FE80::2E0:FCFF:FECD:4F79→ This matches the Link-Local Address field in the LSA. ✅

B. The IPv6 address prefix of R2’s GE0/0/0 is 2001:DB8:2345:23::/64→ This matches the Prefix field in the LSA. ✅

C. This LSA indicates that R2 does not support external routes but can participate in IPv6 route calculation→ ❌ Incorrect.

The Link-LSA does not provide any indication about external route capabilities.

It simply advertises interface-specific IPv6 and link-local info.

Whether R2 supports external routes depends on Type 5 (External) or Type 7 (NSSA) LSAs, not Link-LSAs.

D. This LSA is generated by R2→ The Originating Router: 10.1.2.2 is R2’s router ID, so this LSA is definitely generated by R2. ✅

Correct Answers: A, B, D

The Link-LSA in OSPFv3 contains:

The link-local address used by the originating router on the link.

A list of all IPv6 prefixes associated with the link.

Flags such as router priority and the Router-LSA options.

These LSAs are always generated by the router itself and are not flooded beyond the link.

When port security is enabled and the maximum number of learned MAC addresses is reached, the switch can trigger multiple security actions depending on configuration:

Discard packets with unknown source MACs

Generate alarms

Shut down the port (set to error-down)

Do all the above combined (default behavior)

The most comprehensive and commonly configured behavior is error-down + alarm generation, which corresponds to Option D.

Exact Extract - Huawei HCIE-Datacom Switching Guide:

“When the MAC address limit is reached on a port with port security enabled, the system can generate alarms and set the port to error-down state based on security policies.”

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