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bgp auto summary and aggregrate address

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.

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Cisco Employee

Re: bgp auto summary and aggregrate address

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,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
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