Re: 90 IPv6 sub-TLA allocations made

["Stephen Burley" <]

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@localhost
To: "Peter Willis" pjw@localhost; "Dave Pratt"
djp-ripe-lists@localhost
Cc: "lir-wg" lir-wg@localhost; "ipv6-wg" ipv6-wg@localhost
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@localhost
> >IP Technology Strategist            | Phone:  01473 645178 Fax: 01473
644506
> >BTexact Technologies CTO            |
>
>---------------------------------------------------------------------------
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>
>
> --