nanog mailing list archives
Re: BGP prefix filter list
From: William Herrin <bill () herrin us>
Date: Fri, 24 May 2019 13:25:34 -0700
On Fri, May 24, 2019 at 11:34 AM Blake Hudson <blake () ispn net> wrote:
William Herrin wrote on 5/24/2019 1:22 PM:If you drop the /24, you break the Internet when my connection to CenturyLink is inoperable.Not really. The remote networks that drop visibility to your /24 announcement still have a default route. They just just leave the decision of the best path to your /24 up to their upstream provider(s) rather than having direct knowledge.
If you're talking about a leaf node in the BGP system then sure. You can ditch whatever you want and replace it with default routes. Ditch whole /8's if it floats your boat. Partial feed has always been acceptable for leaf nodes. If you're talking about a transit node then no, you're breaking the Internet. Even if you have a default route, your downstream customer, to whom you fail to provide the /24, will suffer malfunction. Regards, Bill Herrin -- William Herrin bill () herrin us https://bill.herrin.us/
Current thread:
- Re: BGP prefix filter list, (continued)
- Re: BGP prefix filter list Ca By (May 20)
- Re: BGP prefix filter list Alejandro Acosta (May 21)
- Re: BGP prefix filter list Tom Beecher (May 22)
- Re: BGP prefix filter list Alejandro Acosta (May 22)
- Re: BGP prefix filter list Sabri Berisha (May 22)
- Re: BGP prefix filter list Ross Tajvar (May 22)
- Re: BGP prefix filter list Sabri Berisha (May 24)
- Re: BGP prefix filter list Mike Hammett (May 24)
- Re: BGP prefix filter list William Herrin (May 24)
- Re: BGP prefix filter list Blake Hudson (May 24)
- Re: BGP prefix filter list William Herrin (May 24)
- Re: BGP prefix filter list James Jun (May 25)
- Re: BGP prefix filter list Robert Blayzor (May 30)
- Re: BGP prefix filter list William Herrin (May 30)
- Re: BGP prefix filter list Mel Beckman (May 30)
- Re: BGP prefix filter list William Herrin (May 30)
- Re: BGP prefix filter list Mel Beckman (May 30)
- Re: BGP prefix filter list William Herrin (May 30)
- Re: BGP prefix filter list Mel Beckman (May 30)
- Re: BGP prefix filter list Thomas Bellman (May 30)
- Re: BGP prefix filter list Mel Beckman (May 30)