Determining request

[Ashley M. Kirchner]

    Is there a way to detect whether a request came in from a wired 
network versus a wireless network?  Our setup is as follows:

    Main DHCP server that dishes out IPs based on MAC addresses.  This 
is wired into our main switch.  From that switch I also have a wireless 
access point.  A wireless device will send a request out which goes 
through the access point to the DHCP server and back.  The wireless 
class is set to allow unknown-clients.

    If a wired device sends a request, and it has *not* been defined 
already through it's MAC, DHCP will automatically drop it in the 
wireless group and pool.  I don't want that.  For our wired network, I 
don't want anything to be able to get an IP unless it's already 
defined.  For the wireless one, they should all go in the wireless pool 
and get an IP from there.

    So, is there some way to determine if a request came in from a wired 
device versus a wireless one?

    A