Registration Failure on new IP Address

[JamesK]

So on the T41P phone I can move that phone after it is registered from one ip address range to another no issues. Now on the T38G I am running into an issue doing that. The phones are set to get dhcp. Same kind of switch, configured the same exact way. I am running firmware 38.70.0.125.

If i register the phone on 172 network works fine, move it the 192 network. Phone comes up but will not register with stored configuration file. If i log into the web gui it says failed to register. If i hit the autoprovision now button, it says it is working on it but it still will not register successfully. If i move it back to the 172 works soon as it boots up.

I can swap this by initially registering it on the 192 then move it to the 172 and same thing. it will not register successfully. hit autoprovision, says it will but will not successfully register.

Then i registered it had is working on the 192 network but then made a change to the ip address scheme and rebooted the phone same issue.

This leads me to believe there is something wrong with the firmware.

anyone else?