Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

BGP Route Map Help

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 1.1.1.0/24

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.

THANK YOU!

1 REPLY
Hall of Fame Super Silver

Re: BGP Route Map Help

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

see

http://www.cisco.com/en/US/docs/ios/iproute/command/reference/irp_bgp2.html#wp1015944

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

Giuseppe

127
Views
0
Helpful
1
Replies
CreatePlease to create content