Kelvin,
To give a short summary, you can use communities with BGP in a similar manner that you would use tags in IGPs.
The format that you are describing is the "new" community format. The new community is really just to make things easier to manage. You can use the AS#:number to make things easier than just a random number like 234353442, etc.
Please let us know if there's a more specific question.
Regards,
Andre
-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Kelvin Yeo
Sent: Thursday, May 28, 2009 4:35 PM
To: 'Cisco certification'
Subject: BGP Communities values
Anyone can explain the idea behind assigning the communities values such as below
300:200 or 123:456
Why is 300/123 assigned as AA while 200/456 assigned as NN in the AA:NN format? I mean, is there a rule to follow or design purposes? What exactly is it telling us?
Kelvin
Blogs and organic groups at http://www.ccie.net
Received on Thu May 28 2009 - 16:45:21 ART
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