nanog mailing list archives
Re: What is the most standard subnet length on internet
From: Grzegorz Janoszka <Grzegorz () Janoszka pl>
Date: Tue, 23 Dec 2008 14:49:00 +0100
Nathan Ward wrote:
Let me rephrase; Are there people who are filtering /24s received from eBGP peers who do not have a default route?of course.Curiously, it was really meant as a rhetorical question where the answer was "no".Why are people doing this? Are they lacking clue, or, is there some reasonable purpose?
Memory mostly I think. /24 prefixes are ~ the half of all prefixes, but they cover only a small percent of the address space. If your router has > 6 full BGP sessions, you can filter /24 on half of them, your memory usage will drop significantly.
-- Grzegorz Janoszka Leaseweb
Current thread:
- Re: What is the most standard subnet length on internet, (continued)
- Re: What is the most standard subnet length on internet Seth Mattinen (Dec 22)
- Re: What is the most standard subnet length on internet Nathan Ward (Dec 22)
- Re: What is the most standard subnet length on internet Joe Provo (Dec 22)
- Re: What is the most standard subnet length on internet Nathan Ward (Dec 22)
- RE: What is the most standard subnet length on internet Tomas L. Byrnes (Dec 22)
- 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)