Multiple leases

Eustace, Glen G.Eustace at
Mon Jun 5 23:03:24 UTC 2006

Obviously time to find out EXACTLY what I'm dealing with.

Hopefully a packet capture and analysis will spill the beans. 

> Eustace, Glen wrote:
> >Has anyone found a way of forcing a singled NIC, i.e. a constant MAC
> >Address, to be allocated the same lease regardless of any 
> Client Id that
> >may be in the DHCP request.
> >
> >Whilst opting for this behaviour may be considered broken by 
> some and to
> >violate the RFC, I cannot think of any other way to get our 
> PC and MAC
> >Labs (PXE and Netboot) to behave in a predicatable way that 
> allows them
> >to work as we would like.
> >
> >I don't really want to get into hacking code but .....
> AFAIK, at the moment that is what you will need to do. There was talk 
> of a patch to do this, I don't know what it's status is.
> Ways of doing it :
> Simply delete the client-id from all incoming packets - crude.
> Insert the MAC address into the client-id field if the client-id is 
> blank - makes things work the 'windows way' if the client ID is blank
> I'm slightly surprised that you have this problem with the Macs 
> though. By default neither OS9 nor X send a client-id, and I'd be 
> surprised to see the Netboot client using one either. The usual 
> problem is Windows which puts the Mac address in the client-id whilst 
> nothing else does.
> Simon

More information about the dhcp-users mailing list