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RE: Multihoming Issues

"Michel Py" <michel@ARNEILL-PY.SACRAMENTO.CA.US> Sat, 31 August 2002 16:17 UTC

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Subject: RE: Multihoming Issues
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From: Michel Py <michel@ARNEILL-PY.SACRAMENTO.CA.US>
To: Caitlin Bestler <caitlinb@rp.asomi.net>, ietf@ietf.org
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> Caitlin Bestler wrote:
> The potential mismatch between IPv6 and classic DNS
> is that an IPv6 unicast address is structured in two
> parts: the network identifier (the high 64 bits) and
> an Interface ID (the low 64 bits).

This is equally true for IPv4: The network part, whose bits are "1"s in
the subnet mask, and the host part, whose bits are "0"s in the subnet
mask.

> Half of the Interface IDs are globally unique, the
> other half are assigned locally within the network.

I wonder where you got that from. The entire IID is assigned with EUI-64
and we just had a long thread on the ipv6 list about not using it for
routing purposes.

> For the half that are globally unique, a query system
> could be defined to look up that address and return
> the network(s) where it was found.

This likely creates a circular reference: routing is required for DNS to
work; therefore routing should not depend on DNS.

Michel.

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