Jarrod Johnson jarrod.b.johnson+isc at gmail.com
Thu May 6 15:52:47 UTC 2010

1a) On Linux, it depends on your distro.  On Windows,

1b)  That's a large problem I've been trying to look at for a while.  DHCP
4.2 seems to have a hack to dig into DUID-LLT and DUID-LL to pretend it is
keying off of mac (for multi-homed systems, it will still behave in a wonky
way, and NIC replacement behaves a lot differently, and you have the chance
of duplicate matches if you swap nics and reinstall one).   If you have a
lot of control over your provisioning strategy, I have some options I could
exercise for a more robust strategy.

2010/5/6 Ömer Tuğrul <omertugrul at gmail.com>

> Hi,
> I have some trouble with dhcpv6. I have installed version 4.1.1
> 1. DHCPv6 no longer uses mac addresses for fixed ipv6 addresses, instead it
> need DUIDs (14 bytes). I tried for my Vista computer DUID and succeeded.
>      a) How can I view DUID for Linux and XP computers, I couldn't find in
> regedit?
>      b) where is the DUID stored, will it change when the operating system
> disk formatted-reinstalled? It's a big problem for my cooperate database.
> 2. DHCPv6 doesn't supply router address for clients, instead it supports
> prefixes. I tested it with no-RA environment; but the clients couldn't find
> the gateway; so RA is mandatory.
>      Sometimes RA may be undesirable; is there a thought to change IPv6 RFC
> and ISC-dhcp in future, for router address assigning?
> Thanks in advance
> Tugrul
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> dhcp-users at lists.isc.org
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