Configure OSPF area 10 as a Totally NSSA NSSA area. The commands that need to be configured are: [Huawei] ospf 1 [Huawei-ospf-1] area 10 [Huawei-ospf-1-area-10] nssa ______

Question

Options

• Ano-summary
• B
• C
• D

• A
  84% (37)
• B
  5% (2)
• C
  9% (4)
• D
  2% (1)

Explanation

Option A (no-summary) is correct because the nssa no-summary command converts a standard NSSA into a Totally NSSA, which blocks Type 3 and Type 4 summary LSAs from entering the area in addition to blocking Type 5 external LSAs - leaving only a default route injected by the ABR. Without no-summary, the command nssa alone creates a regular NSSA, which still allows inter-area summary LSAs (Type 3) to flood in, making it less restrictive than a Totally NSSA. The other choices (B, C, D) are blank/absent, meaning there is no valid alternative keyword that achieves the Totally NSSA behavior on Huawei's VRP platform.

Memory tip: Think of no-summary as "no summaries allowed" - it's the same keyword used to create a Totally Stub area (stub no-summary), and it works the same way for NSSA: adding no-summary always upgrades the area to its "totally" variant by stripping out Type 3 LSAs.

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