Question about dhcp-client-identifier

Darren perl-list at
Tue Aug 21 20:12:01 UTC 2007

That is true until you have two devices with the same mac address.  Then 
it uses the UID and allocates the two devices two different ips.  If 
these two devices are in the same physical network, they can't function 
in this situation anyway, so better to give them both the same IP 
address and ignore the fact that they are two different devices.  Even 
if they are in two different physical networks, this behavior is still 
desirable in our configuration.

Allie Hopkins wrote:
> Just use the hardware-address statement in the host declaration.  First
> the server looks for match on uid, then mac.  If you don't specify uid
> anywhere, then it will automatically look at the hardware-address
> statement and ignore any uid sent by the host.
> Allie
> On Tue, 2007-08-21 at 15:22 -0400, Darren wrote:
>> Folks,
>> Is this simply not possible?
>> Darren wrote:
>>> Folks,
>>> Does anyone know if it is possible to modify the string contained in the 
>>> dhcp-client-identifier option so that it is actually the mac address 
>>> when the server receives the packet?  Thereby forcing the DHCP server to 
>>> key on mac address and ignore dhcp-client-identifier (UID).  Or, is 
>>> there now an option (as of v.3.1.0) that can configure the server to key 
>>> on MAC address and ignore dhcp-client-identifier ?  I couldn't find one 
>>> in the config options nor could I find much discussion about this in the 
>>> mail list archives.
>>> Thank you!
>>> Darren

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