A while ago I've installed Fedora Linux on one of my workstations and spent enormous amount of time trying to give it a static IP address from the Cisco IOS DHCP server. I though I was the only one dumb enough to have this problem, so I didn’t document my solution, but then one of the readers made a comment to the Assigning server IP addresses with DHCP post describing almost identical symptoms:
I have a hp2300n and I want to make a static IP assignment with DHCP. Nothing is working: hardware-address, client-identifier, no prepend, 01 prepend, 00 prepend.
In my case, the Fedora DHCP client did not send any DHCP client-ID in the DHCPREQUEST message. One would think that the IOS DHCP server would use the MAC address as the client-ID, but that's not the case. You have to configure the hardware-address parameter in the host DHCP pool to match the MAC address of the DHCP client with the pool and the static IP address:
ip dhcp pool fedi
host 192.168.200.206 255.255.255.240
dns-server 18.104.22.168 22.214.171.124