Geoff on IPv4 Exhaustion

Francois Tigeot ftigeot at
Wed Nov 16 10:32:12 CET 2011

On Wed, Nov 16, 2011 at 09:52:08AM +0100, Shane Kerr wrote:
> On Tue, 2011-11-15 at 17:30 +0100, Francois Tigeot wrote:
> > One of the missing links on the client side is working DHCPv6 software.
> Our DHCPv6 software (speaking as an ISC employee) runs on Unix systems,
> Windows has had DHCPv6 since Vista, and the latest OS X has working
> DHCPv6 as a client. If you're talking about specific equipment from
> specific vendors, then I can't say.

I was speaking in general; I had a brief look at isc-dhcpd 6 months ago and
at the time, it was not possible to use it to provide dhcpv6 service without
removing the existing v4 configuration.

> > It's ridiculous to not be able to configure hosts the same way it has been
> > done in IPv4 for years.
> > The bare minimum includes sending router and DNS information on a host-by-host
> > (not complete LAN segment) basis.
> Unfortunately the DHCPv6 standards do not yet support sending router
> information. This comes from ideological opposition to DHCPv6 within the
> IETF, but that is finally being broken through by operators who actually
> need this functionality, so hopefully Real Soon Now DHCPv6 will support
> this.

Creating and deploying the new software will take some time. DHCPv6 could
only become usable in 5-10 years...

> DNS information can already be specified on a host-by-host basis, at
> least with our client & server.

How is it possible ? AFAIK, the "hardware ethernet" option doesn't work
anymore with DHCPv6...


Francois Tigeot

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