BGP aggregate address

[Kashish_Patel]

I am trying to understand bgp aggregate address command.

I have configured "aggregate address" command under router bgp. Now when I do "sh ip bgp neighbor <IP> advertised-routes", I sometimes see next-hop as 0.0.0.0 and for some routes, I see a downstream IP as next hop. I am quite new to BGP and did not understand this. Could someone please explain?

Thanks.

[cadet alain · Accepted solution]

Hi,

the summary created by the aggregate address command  has 0.0.0.0 as next-hop and the subnet routes part of the aggregate (  which by default are not suppressed )  keep their original next-hop.

Regards.

Alain

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[Kashish_Patel]

Thanks Cadet. That answers my question. Rated as 5!