DHCPv6 and MAC Address inclusion

perl-list perl-list at network1.net
Tue Jan 24 14:53:55 UTC 2012

I for one would love to see your config to see how you are doing this. The hardware ethernet isn't included in the DHCPv6 packet (at least as far as I can see from packet captures) other than as part of the client-id (DUID) on *SOME* clients (ie: NOT d-link). Would love to see your configs... Didn't know the DHCP server decoded the DUID to know what the hardware ethernet is. 

----- Original Message -----

> From: "Walter Andrew Scott" <walter.scott at utah.edu>
> To: "Users of ISC DHCP" <dhcp-users at lists.isc.org>
> Cc: "Tom Ammon" <tom.ammon at utah.edu>
> Sent: Tuesday, January 24, 2012 9:49:05 AM
> Subject: RE: DHCPv6 and MAC Address inclusion

> I realize I'm coming in late to this discussion, but I thought I'd
> throw in my personal experience with a question.. We're running the
> ISC dhcpv6 server v4.1.1-P1 that comes pre-packaged with Redhat 6.
> We use the phrase "hardware ethernet" to denote MAC addresses in our
> reservation tables and the clients get recognized. Is this behavior
> not part of the RFC and/or removed in newer versions of the server?

> I realize that using the MAC address limits us to one assignment per
> interface, but we don't have any cases where we dynamically assign
> more than one address per physical NIC so we don't lose anything.
> I'm just wondering if our current approach is a kluge and we should
> be trying to figure out a clean way to get the server to tell us
> which link-local addresses and/or MAC addresses match to which DUIDs
> that are being used by clients (we haven't been able to find one
> yet) or if we can expect to keep going with MACs as the client-ids.

> Walter A. Scott
> Web Application Developer
> Center for High Performance Computing
> University of Utah
> walter.scott at utah.edu

> From: dhcp-users-bounces+walter.scott=utah.edu at lists.isc.org
> [dhcp-users-bounces+walter.scott=utah.edu at lists.isc.org] on behalf
> of perl-list [perl-list at network1.net]
> Sent: Tuesday, January 24, 2012 07:27
> To: Users of ISC DHCP
> Subject: Re: DHCPv6 and MAC Address inclusion

> A convincing case for the need of the MAC address in the DHCP packet:

> --snip--
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