90 IPv6 sub-TLA allocations made
Stephen Burley stephenb at uk.uu.net
Wed Aug 15 16:39:56 CEST 2001
Will the new draft include the priciple of MIR's which i detailed on the list (which stangly got no negative response) and will it also understand the concept of sub-allocation? Regards, Stephen Burley UUNET EMEA Hostmaster ----- Original Message ----- From: "Joao Luis Silva Damas" <joao at ripe.net> To: "Peter Willis" <pjw at ip-engineering.bt.com>; "Dave Pratt" <djp-ripe-lists at djp.net> Cc: "lir-wg" <lir-wg at ripe.net>; "ipv6-wg" <ipv6-wg at ripe.net> Sent: Wednesday, August 15, 2001 3:03 PM Subject: Re: 90 IPv6 sub-TLA allocations made > Hi, > > I think the RIR staff working on the new policy draft understand the > issue. I believe the new draft will reflect this by moving away from > a fixed percentage to using the huitema/durand ratio which is meant > to give a consistent view of space utilization when using variable > levels of hierarchy. > > Joao Damas > RIPE NCC > > At 17:27 +0100 14/8/01, Peter Willis wrote: > >Colleagues, > > > >I've just done some calculations that shows the maximum theoritical > >utilisation that can be achieved is 75% whilst maintaining the minimum size of > >routing table. That is if you take a large number of subnets, each subnet > > containing a random number of hosts, and assign to each subnet the nearest > > power of 2 larger than the number of hosts, the utilisation you get is 75%. > > > >This is a 75% utilisation per level of network hierarchy. > > > >So if we assume 3 levels of network hierarchy and each level doing perfect > > routing aggregation and perfect address allocation we will get an overall > > utilisation of > > 0.75^3 = 0.422 == 42% overall utilisation for the TLA. > > > >I'd like to bet that if we have a network with enough hosts to justify 64 bits > >of address space it'll also be large enough to require more than 3 levels of > >network hierarchy. Any requirements to get high address space utilisation out > >of IPv6 can simply be demonstrated to lack scaling qualities. > > > >Regards, > > > > > >--------------------------------------------------------------------------- ---- > >Peter Willis | E-mail: peter.j.willis at bt.com > >IP Technology Strategist | Phone: 01473 645178 Fax: 01473 644506 > >BTexact Technologies CTO | > >--------------------------------------------------------------------------- ---- > > > --
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