nanog mailing list archives
Re: BGP prefix filter list
From: William Herrin <bill () herrin us>
Date: Fri, 24 May 2019 11:22:48 -0700
On Fri, May 24, 2019 at 10:29 AM Mike Hammett <nanog () ics-il net> wrote:
If networks are going to make unconventional announcements, I'm not concerned if they suffer because of it.
No, no no. You're not getting it. I'm a customer of Verizon. I'm a customer of CenturyLink. I get a /24 from CenturyLink and announce it via my two carriers: Verizon and CenturyLink. CenturyLink also announces the aggregate, let's say /16 that the /24 is a part of because all of the /16 containing my /24 is their allocation. Get it? I announce the /24 via both so that you can reach me when there is a problem with one or the other. If you drop the /24, you break the Internet when my connection to CenturyLink is inoperable. Good job! There is nothing unconventional about this arrangement. It was commonplace before ARIN dropped the minimum end-user assignment to /24 and many networks who themselves up that way have found it inconvenient to renumber. Regards, Bill Herrin -- William Herrin bill () herrin us https://bill.herrin.us/
Current thread:
- Re: BGP prefix filter list, (continued)
- Message not available
- Re: BGP prefix filter list John Kristoff (May 20)
- Re: BGP prefix filter list Seth Mattinen (May 20)
- 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)