[gPXE] DHCP Client ID in gPXE 1.0.0?

[Steven Shiau]

Stefan Hajnoczi wrote:
> On Fri, Mar 19, 2010 at 8:55 AM, Steven Shiau <steven at nchc.org.tw> wrote:
>   
>>> Does this mean you removed the client identifier and dhcpd handed out
>>> the same IP address when Linux booted?
>>>       
>> Yes. That's true here.
>>     
>
> I'm not a DHCP expert.  It would be interesting to check the RFCs and
> ISC dhcpd IP allocation code.  I assumed DHCP servers only hash MAC
> addresses for IP allocation but your case shows that the client
> identifier also comes into play.
>   
Not really. From RFC 2131:
http://tools.ietf.org/html/rfc2131
DHCP client identifier is honored if it's assigned.
> Could you change the Linux dhcp client's identifier -
> which one you change is arbitrary, right?
>   
FWIK, basically yes, you can give it an arbitrary value, if it's unique 
in the subnet.

Steven.

-- 
Steven Shiau <steven _at_ nchc org tw> <steven _at_ stevenshiau org>
National Center for High-performance Computing, Taiwan. http://www.nchc.org.tw
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