host-identifier with IPv6

Chuck Anderson cra at WPI.EDU
Fri Feb 27 00:59:02 UTC 2009

On Fri, Feb 27, 2009 at 01:39:57PM +1300, Eustace, Glen wrote:

> I can't see how I can use DHCPv6 without being able to match on 
> Hardware address.  All our v4/v6 data is in a database and the DHCP 
> configs are built programmatically.  If I can't use the only unique 
> quantity I have to identify a host, I can't see how I can use DHCP 
> at all.

The koolaid that the IETF would have us drink is that instead of 
recording the unique MAC address of a machine in the DHCP database, we 
instead record the DUID that the OS generates when it starts up the 
first time.  Then instead of having to update the MAC address when 
replacing the Ethernet hardware, we get to update the DUID when the OS 
is reinstalled.  And we get to record multiple DUIDs, one for each OS 
on a multi-boot machine.  And we still have the problem of PXE 
firmware using a different DUID that the OS.

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