[ipxe-devel] custom dhcp client_id option

Michael Brown mcb30 at ipxe.org
Tue Apr 12 14:21:52 UTC 2016

On 12/04/16 15:04, Maule Mark wrote:
> I noticed that.  However, dnsmasq only considers client_id (if present)
> followed by hwaddr when looking up configs in its hostsfile.  I've tried
> hacking around that in dnsmasq (by trying to match client_uuid if
> present and no client_id match), but the code is pretty tangled and it's
> not clear to me that this would be spec compliant anyway.

It looks as though our use of the link-layer address as the DHCP client 
identifier (option 61) may be obsolete anyway, since IPoIB devices now 
use 6-byte eIPoIB LEMACs in ll_addr (rather than the 20-byte IPoIB MAC).

Wissam: any objections to switching all link layers (including eIPoIB) 
to place the client UUID in option 61?


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