In message <[EMAIL PROTECTED]>, Jon Crowcroft typed:
>>if multihoming is killing routing coz default free zone routers have
>>too many entries
>>and NAT is killing users coz they can't get always on addresses
>>why not have multihomed sites (aren't they usually server/core
>>provider sites) LEASE their standby link address prefixes to access provider
>>sites - and swap the address prefixes when their default link fails
>>and they need to failover to the standby link/addresses...
>>symmetry dictates this ought to work out...and everyone wins
>>by setting uo as a market we could even make the incentives right...
i wasn't too clear about this (a bit like my lousy 1000 bit error in
the port nat message - that'll teach me to send emails before i've had
any coffee:-)
so after suitable basting by sean doran, here's the scoop:-
I like GSE; however we dont have v6 and we do have NATs; we also have
multihoming.
1/ consider global DHCP as a tool, and a mechanism for buying a
lease on an aggregate
2/ do NATting on aggregates
3/ design a BGP attribute (yech, i know) to inidcate that an address
range is "bank switchable" - this means that it is part of a lease
from one AS to another. This means that when told (via management, BGP
update, or designated "important" ingress or egress link failure), a
pair of domains then bank switch the address range, but enable NATing
on the range for exsting flows...
got it?
j.
