nanog mailing list archives
BGP Path Filtering
From: "Mark Radabaugh" <mark () amplex net>
Date: Thu, 15 May 2003 22:29:18 -0400
I'm having a hard time finding best practices for filtering outbound bgp announcements when providing transit to bgp-speaking customers. While we currently multi-home to several providers it appears we will soon need to provide transit for customers with their own AS's. I find lots of references (and understand) the basic ip as-path access-list 3 permit ^$ and it would seem that should we wish to provide transit for a bgp customer AS12345 we would use: ip as-path access-list 3 permit ^12345$ but I think this breaks if AS12345 prepends their advertisement. Next up is: ip as-path access-list 3 permit ^12345_[0-9]$* Which seems correct to me. Is this still best practice (or even correct)? Mark Radabaugh Amplex (419) 720-3635
Current thread:
- BGP Path Filtering Mark Radabaugh (May 15)
- Re: BGP Path Filtering Brian Wallingford (May 15)
- Re: BGP Path Filtering Jay Ford (May 15)
- Communities BCP [was: RE: BGP Path Filtering] Deepak Jain (May 16)
- Re: Communities BCP [was: RE: BGP Path Filtering] Daniel Golding (May 16)
- Re: Communities BCP [was: RE: BGP Path Filtering] Joe Abley (May 16)
- Re: Communities BCP [was: RE: BGP Path Filtering] Jay Ford (May 16)
- Re: Communities BCP [was: RE: BGP Path Filtering] Danny McPherson (May 16)
- Re: Communities BCP [was: RE: BGP Path Filtering] Stephen J. Wilcox (May 16)
- Re: Communities BCP [was: RE: BGP Path Filtering] Danny McPherson (May 16)
- Re: Communities BCP [was: RE: BGP Path Filtering] Richard A Steenbergen (May 16)
- Communities BCP [was: RE: BGP Path Filtering] Deepak Jain (May 16)