The solution to what you are describing is really using community strings to tag routes coming from customers then filtering announcements based on those tags. Google is your friend here. If not, hit me off-list for some cisco config examples.
John van Oppen Spectrum Networks LLC 206.973.8302 (Direct) 206.973.8300 (main office) -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Michalis Palis Sent: Monday, January 21, 2008 1:34 AM To: [email protected] Subject: [c-nsp] BGP Filtering Policy with regular expressions Hello all I am trying to write a BGP policy using regular expressions for outgoing filtering. I need to allow customer AS numbers to be announced by our network as well as any prepends they send or any AS behind our customer's AS. e.g allow 12345 678 9123 12345 12345 etc.... I did try the follwing which seems to work but I am not sure if I will have any security problems. ^12345_ for AS12345 and anything behind AS12345 Any suggestions will be appreciated _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
