Advanced BGP - Route Summarization

3 important questions on Advanced BGP - Route Summarization

What does the Summary-Only keyword does in the BGP aggregate-address command?

It prevents the smaller component routes to be propagated in the RIB.

In BGP, what is the Atomic Aggregate?

It indicates that a loss of path information has occurred, often due to Route Summarization.

What is the AS_SET keyword used for in the BGP aggregate-address command?

It is used to keep BGP path information history.
It adds the AS_Path settings from the original prefixes to the AS_SET portion of the AS_Path. AS_SET is displayed within brackets and counts as only one hop.

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