bgp auto summary and aggregrate address

[jemekeren]

hello guys.. what is the difference auto summary and aggreate address? as i know we can achive summarization with the use of routemap out direction by also create static route pointing to null0.

[Harold Ritter]

Jimmy,

auto-summary allows for summarization on major net boundaries when redistributing in BGP and when using network statements to originate prefixes in BGP.

On the other hand, the aggregate-address allows for sumamrization on any boundary from prefixes already existing in the BGP local-rib.

Note that auto-summary is now disabled by default in most IOS versions as it is rarely used.

Hope this helps,