Which of these practices should you follow when designing a Layer 3 routing protocol?

The correct answer is D. Summarize routes at the distribution to the core to limit EIGRP queries or OSPF LSA. Route summarization at the distribution layer is a fundamental best practice in hierarchical network design. In EIGRP, summarization prevents query messages from propagating into the core, keeping the Stuck-In-Active (SIA) problem contained within its own domain. In OSPF…

Advanced Addressing and Routing Solutions

Question

Options

ANever peer on transit links.
BBuild squares for deterministic convergence.
CBuild inverted U designs for deterministic convergence.
DSummarize routes at the distribution to the core to limit EIGRP queries or OSPF LSA

How the community answered

(44 responses)

A
7% (3)
B
5% (2)
C
16% (7)
D
73% (32)

Explanation

Route summarization at the distribution layer is a fundamental best practice in hierarchical network design. In EIGRP, summarization prevents query messages from propagating into the core, keeping the Stuck-In-Active (SIA) problem contained within its own domain. In OSPF, summarization between areas limits LSA flooding, reducing SPF recalculation overhead in the core. The other options are incorrect: you should peer on transit links (not avoid them), hierarchical designs use triangles (not squares or inverted-U shapes) to provide deterministic, loop-free convergence.

Topics

#route summarization#EIGRP#OSPF#Layer 3 design

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