nanog mailing list archives
Re: IPv6 news
From: Todd Underwood <todd () renesys com>
Date: Wed, 12 Oct 2005 17:06:33 -0400
ras, all On Wed, Oct 12, 2005 at 04:38:53PM -0400, Richard A Steenbergen wrote:
of its legacy unused /8 allocations. I'm certain that someone with some historical BGP data could put together an analysis of who has not used their IP allocations at ALL within the last few years, still more low hanging fruit which we can take care of now. Of course, the last time I mentioned an unused /8 which should have been returned years ago on this list, the party in question started announcing it in BGP the next day.
the problem here is this: there is no guarantee that prefixes that are never seen in global tables are not used and deployed. for example, the US DoD has quite a lot of address space (pre-rfc-1918) deployed onto the SIPRNet, i believe. this is not routed to the public internet, but is in use. an argument could be made that one could ignore that space, since it is never intended to route publicly, but intentions change and address/prefix conflicts are bad. by saying this i don't intend to disagree with the general premise: there are tons of genuinely unused prefixes out there. the point is just that i doubt that there is an automated way to determine exactly which ones they are. -- _____________________________________________________________________ todd underwood director of operations & security renesys - interdomain intelligence todd () renesys com www.renesys.com
Current thread:
- Re: IPv6 news [global crossing], (continued)
- Re: IPv6 news [global crossing] Pekka Savola (Oct 12)
- Re: IPv6 news [global crossing] Richard A Steenbergen (Oct 12)
- Re: IPv6 news [global crossing] Pekka Savola (Oct 12)
- Re: IPv6 news JORDI PALET MARTINEZ (Oct 12)
- Re: IPv6 news Randy Bush (Oct 12)
- Re: IPv6 news Daniel Golding (Oct 12)
- Re: IPv6 news Brandon Ross (Oct 12)
- Re: IPv6 news Michael . Dillon (Oct 13)
- Re: IPv6 news Brandon Ross (Oct 13)
- Reallocation of IPv4 space (was Re: IPv6 news) Etaoin Shrdlu (Oct 13)
- Re: IPv6 news Daniel Golding (Oct 12)
- Re: IPv6 news Richard A Steenbergen (Oct 12)
- Re: IPv6 news Todd Underwood (Oct 12)
- Re: IPv6 news Randy Bush (Oct 12)
- Re: IPv6 news Daniel Roesen (Oct 12)
- Re: IPv6 news Valdis . Kletnieks (Oct 12)
- Re: IPv6 news Florian Weimer (Oct 12)
- Re: IPv6 news Michael . Dillon (Oct 13)
- Re: IPv6 news Crist Clark (Oct 13)
- Re: IPv6 news Joseph S D Yao (Oct 14)
- Re: IPv6 news JORDI PALET MARTINEZ (Oct 12)
- Re: IPv6 news Sean Figgins (Oct 12)