RE: [dhcwg] "client identifier" in server replies

After discussing several alternatives to solve the problem, servers including "client id" field in their replies seems to be the clean solution to it. 
If this is agreed upon, next thing is how to fix this in the protocol??

regards,
swamy.

> -----Original Message-----
> From: ext Bud Millwood [mailto:budm@weird-solutions.com]
> Sent: Wednesday, July 09, 2003 2:19 PM
> To: Ted Lemon
> Cc: dhcwg@ietf.org; Nelakuditi Narasimha (NET/Bangalore)
> Subject: Re: [dhcwg] "client identifier" in server replies
> 
> 
> On Tuesday 08 July 2003 20.44, Ted Lemon wrote:
> > On Tuesday 08 July 2003 07:49, Bud Millwood wrote:
> > > Filling out chaddr and htype *will* eliminate the 
> problem. As long as
> > > client id is also present, the device will be identified 
> with client id
> > > (which is the preferred identifier).
> >
> > Bud, there are some cases, particularly with firewire, 
> where there is no
> > way to fill out the hardware address.   Of course it needs 
> to be filled out
> > in other cases - the protocol requires it.
> 
> It would seem that if you do not have a hardware address, the 
> only way to 
> guarantee that a response is for you is if your client 
> identifier is in the 
> packet, since that's guaranteed to be unique on the "subnet" 
> ("segment" seems 
> a better word choice - 2131.2p5). And XID then only needs to 
> be unique across 
> DHCP transactions on the specific client.
> 
> I don't recall seeing anything that stated that chaddr *must* 
> be globally 
> unique for a given htype, so is it not possible to assume 
> that if your client 
> identifier is unique for your segment, that it could also 
> qualify as a 
> chaddr?
> 
> I can hear the groans now. :) 16 bytes is arbitrary, and this 
> makes a direct 
> link between chaddr and clientid, but only at the client 
> side, and only for 
> packet identification.
> 
> If not, Narasimha's proposal is the only solution I can see.
> 
> Bud Millwood
> Weird Solutions, Inc.
> http://www.weird-solutions.com
> tel: +46 8 758 3700
> fax: +46 8 758 3687
> mailto:budm@weird-solutions.com
> 

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