I found this post via Google trying to solve the similar problem with C3200n.
>> this will then cause problems as all the pcs that are trying to print to this
>> printer will no longer be able to find the printer.
Originally, I also had this problem (with C200n, but it is probably similar). If I recall correctly, I solved it as follows:
1. Open the OKI LPR UTILITY from the machine you are trying to print from.
2. Choose Option > Setup
3. Make sure that the Auto Reconnect checkbox is checked.
Again, I believe that is what I did to solve that I couldn't print
after power outages etc. The IP is not static, but it still solves the
Today I wanted a static IP for my OKI C3200n because sometimes there
would be conflict between the IP for my printer and another machine in
the house with a static IP.
What I did was the following.
1. In the printer menu locate the NETWORK MENU
2. Go to the IP ADDRESS SET option, change from AUTO to MANUAL
3. Go to the IP ADDRESS OPTION, change to the desired ip address. In my
case it was at 10.0.0.5, but I wanted 10.0.0.6 for the printer, so I
changed it to that. Typically this is either 10.0.x.x or 192.168.x.x
4. Press the online button. The printer will reset the network connection (it took approx 1 minute)
5. This should be enough. You can try to ping the printer at the new IP, or navigate to the new IP in your browser: