>>>>> "Brian" == Brian E Carpenter <Brian> writes:
>> I'm also surprised that we think we have to cope with flash renumbering
>> as a regular event, rather than a service-interrupting, ISP truck roll
>> catastrophy.
Brian> But every time you reboot your antiquated v4-only CPE and/or the
antiquated
Brian> v4-only PCs behind it, the PCs all get new IP addresses, which may or
Brian> may not be the same as the previous time. There's nothing new in
flash
Brian> renumbering for homenets. Not handling this would be a step
Brian> backwards.
Well...
1) sure, but the *customer* does this, not the ISP.
2) the clients do have DHCP leases, and if they ask to renew their
previous IP, it usually gets honored.
In IPv6 space, the host part will generally stay the same (modulo
privacy extensions, which are default on for some clients). We've said
that the ULA ought to stay the same, so in fact, I agree, the internal
addresses actually all stay the same.
I'm still surprised that an ISP will need to flash renumber faster than
it can just expire leases. If it's just repartitioning of network to
deal with growth, that ought to be predictable and prefix lifetimes can
be reduced in advance.
If it's actually some equipment failing, resulting in service
interruptions, and then restoration by rewiring the network... then I
understand.
--
Michael Richardson <[email protected]>, Sandelman Software Works
IETF ROLL WG co-chair. http://datatracker.ietf.org/wg/roll/charter/
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