Cisco :: 1921 - DHCP Configuration / Assign Fixed IP To One Device While Assigning Others?

This is IOS 15.1(4)M3 on a 1921 router. The LAN is 192.168.42.1/24. (DHCP config is further down.) We have a small range that we want to assign via DHCP to devices; .200 through .220 . At the same time, we have a handful of Macintosh systems to which we want to assign a specific address that is not in that 200-220 range. I don't want to configure the assignment based on the Ethernet MAC addresses because these systems might connect via UTP or wireless; that is to say, they have more than one MAC address. They only ever connect using one interface/MAC address at a time, but it's their choice; in some areas wi-fi is available, and in some areas they have to cable-up.
 
The Mac OSX network settings has a field for "DHCP Client ID". It would be much easier to tell the users of these systems to put their Mac's name in the Client ID field for both their wired and wireless DHCP configs. (As opposed to having them all lookup, and then give me their Ethernet MAC addresses for both of their interfaces.) I tried this with my Mac's (named "shrike") wi-fi interface, but I don't get the 192.168.42.14 address that I expected. I get an address from the .200 to .220 range.
 
Here's the DHCP-related config from the router:
 
router#sh run | s dhcp
ip dhcp excluded-address 192.168.42.1 192.168.42.199
ip dhcp excluded-address 192.168.42.221 192.168.42.254
ip dhcp pool OurOffice
network 192.168.42.0 255.255.255.0

[code]....
 
Is "client-name" the wrong place to configure the DHCP Client ID?