Cisco Certified Network Professional (CCNP) Question:

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What is the major difference between BGP and IGP route summarization?

CCNP Interview Question
CCNP Interview Question

Answer:

When a summary address is created with an IGP (EIGRP, OSPF, and IS-IS), the specific routes of the summary are not advertised. BGP advertises the summary, and all the specific routes of the summary unless they are specifically suppressed.

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