nanog mailing list archives
Re: Route table growth and hardware limits...talk to the filter
From: bmanning () vacation karoshi com
Date: Tue, 11 Sep 2007 09:15:00 +0000
On Mon, Sep 10, 2007 at 10:16:17AM -0500, Stephen Sprunk wrote:
Thus spake "Jon Lewis" <jlewis () lewis org>The trouble is, it turns out there are a number of networks where CIDR isn't spoken. They get their IP space from their RIR, break it up into /24s, and announce those /24s (the ones they're using anyway) into BGP as /24s with no covering CIDR.IMHO, such networks are broken and they should be filtered. If people doing this found themselves unable to reach the significant fraction of the Net (or certain key sites), they would add the covering route even if they were hoping people would accept their incompetent/TE /24s.
well, your assumptio n about how prefixes are used might be tempered with the thought that some /24s are used for interconnecting ISP's at exchanges... and for that matter it seems a lazy ISP to pass the buck on "routability" to an org that runs no transit infrastructure. RIR's (Well ARIN anyway) has NEVER assured routability of a delegated prefix. Tracking /filters based on RIR delegation policy seems like a leap to me... --bill
Stephen Sprunk "God does not play dice." --Albert Einstein
Current thread:
- Re: Route table growth and hardware limits...talk to the filter, (continued)
- Re: Route table growth and hardware limits...talk to the filter Leo Bicknell (Sep 07)
- Re: Route table growth and hardware limits...talk to the filter Jon Lewis (Sep 07)
- RE: Route table growth and hardware limits...talk to the filter Lincoln Dale (Sep 07)
- RE: Route table growth and hardware limits...talk to the filter Jon Lewis (Sep 08)
- RE: Route table growth and hardware limits...talk to the filter Lincoln Dale (Sep 09)
- Re: Route table growth and hardware limits...talk to the filter Jon Lewis (Sep 07)
- Re: Route table growth and hardware limits...talk to the filter William Allen Simpson (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Jared Mauch (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Adrian Chadd (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Joe Provo (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Leo Bicknell (Sep 07)
- Re: Route table growth and hardware limits...talk to the filter Stephen Sprunk (Sep 10)
- Re: Route table growth and hardware limits...talk to the filter bmanning (Sep 11)
- Re: Route table growth and hardware limits...talk to the filter Russ White (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Forrest (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Andrew - Supernews (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Forrest (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Joe Provo (Sep 09)
- Re: Route table growth and hardware limits...talk to the filter Forrest (Sep 09)