nanog mailing list archives
Re: Route table growth and hardware limits...talk to the filter
From: "Stephen Sprunk" <stephen () sprunk org>
Date: Mon, 10 Sep 2007 16:54:54 -0500
Thus spake "Kevin Loch" <kloch () kl net>
Stephen Sprunk wrote:Sucks to be them. If they do not have enough PA space to meet the RIR minima, the community has decided they're not "worthy" of a slot in the DFZ by denying them PI space.Not true, there is an ARIN policy that allows you to get a /24 from one of your providers even if you only need 1 IP address: NPRM 4.2.3.6 "This policy allows a downstream customer's multihoming requirement to serve as justification for a /24 reassignment from their upstream ISP, regardless of host requirements." http://www.arin.net/policy/nrpm.html
If the PA /24 is under 199/8 or 204-207/8, then the filters being discussed would allow their advertisement through, because ARIN's minimum allocation for those blocks is /24. In ARIN's 22 other /8s, the filters would not because the minimum is /20 (or /22, for 208/8).
Let's also keep in mind that if other folks block a PA more-specific, the site doesn't lose connectivity unless they lose their upstream connection to the LIR that assigned them the block. I suspect that many of them already see that behavior today, at least partially; we're really discussing making it a near-complete outage versus a semi-outage. That's life if you don't qualify for a real routing slot via PI.
S Stephen Sprunk "God does not play dice." --Albert Einstein CCIE #3723 "God is an inveterate gambler, and He throws theK5SSS dice at every possible opportunity." --Stephen Hawking
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 Bradley Urberg Carlson (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 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)
- 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 Kevin Loch (Sep 10)
- 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 Kevin Blackham (Sep 10)
- Re: Route table growth and hardware limits...talk to the filter Jon Lewis (Sep 11)
- Re: Route table growth and hardware limits...talk to the filter Adrian Chadd (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 Andrew - Supernews (Sep 08)
- 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 Forrest (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Tony Li (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Randy Bush (Sep 08)
- Re: Route table growth and hardware limits...talk to the filter Adrian Chadd (Sep 09)