nanog mailing list archives
Re: What is the most standard subnet length on internet
From: Jon Lewis <jlewis () lewis org>
Date: Mon, 22 Dec 2008 20:11:45 -0500 (EST)
On Mon, 22 Dec 2008, Seth Mattinen wrote:
Anyone running a platform that can't take a full table would apply such a filter to weed out anyone who likes to announce all of their space as /24's for "traffic engineering". If one does that and doesn't announce the aggregate as well, one could find themselves facing random black holes.
There's no "if" about it. Months ago when I and others were looking into this, we found plenty of examples of networks with /19s, /20s, etc. announcing only the /24 deaggregates. If you plan to filter these people and have customers to answer to, you'll need to point default at someone who's not filtering them.
---------------------------------------------------------------------- Jon Lewis | I route Senior Network Engineer | therefore you are Atlantic Net | _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
Current thread:
- Re: What is the most standard subnet length on internet, (continued)
- Re: What is the most standard subnet length on internet Valdis . Kletnieks (Dec 22)
- RE: What is the most standard subnet length on internet Skywing (Dec 22)
- RE: What is the most standard subnet length on internet Church, Charles (Dec 22)
- Re: What is the most standard subnet length on internet Nathan Ward (Dec 23)
- RE: What is the most standard subnet length on internet Tomas L. Byrnes (Dec 23)
- Re: What is the most standard subnet length on internet Grzegorz Janoszka (Dec 23)
- Re: What is the most standard subnet length on internet Alex H. Ryu (Dec 23)
- Re: What is the most standard subnet length on internet Brett Frankenberger (Dec 24)
- Re: What is the most standard subnet length on internet Valdis . Kletnieks (Dec 22)
- Re: What is the most standard subnet length on internet bmanning (Dec 22)
- Re: What is the most standard subnet length on internet Jon Lewis (Dec 22)
- RE: What is the most standard subnet length on internet Scott Morris (Dec 24)