BGP Route Map Help

Unanswered Question
Apr 16th, 2009

I have 2 different ISP connections, running BGP with a AS #. ISP#1 is a 20Mb link, ISP#2 is 3Mb link. I'm using a prefix-list and route map that weights my network advertisements on both routers. On the 20Mb router my config is as follows:

ip prefix-list ISP1 seq 10 permit

route-map ISP1 permit 10

match ip address prefix-list ISP1

set community XXXXX:100

When I look at the config, the route map shows:

set community XXXXXXXXXX (where the x's are a string of numbers, no colon - random looking #'s)

Could someone please explain what these numbers are and how they are determined.


I have this problem too.
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Giuseppe Larosa Thu, 04/16/2009 - 23:11

Hello Matt,

you need to add a command in global config mode to see communities in the ASN:value notation:

ip bgp-community new-format


What you see now is the community seen as a 32 bits unsigned integer.

Add the above command in global config and you will see the community in the same way as you entered it.

Hope to help



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