My name is Jerry Harris and my question is can I block unwanted IP Addresses from coming into Call Manager. We have an Admin Server which pushes the information to our Call Manager. A device is on boarded into our Admin Server and that information is pushed to the call manager. The device gets it's IP address from the dhcp server which is in 172.16. x.x range. We are having an issue with 192.168.x.x addresses showing up in Call Manager when we go to phone > find for all devices this is when we these IP addresses showing up as unregistered /unknown. Can I set up a translation pattern or rule to block these IP"s ?
No, you would need to address this via your routers/switches and ACLs.
CUCM doesn't care about the IP of a device, or where it's getting it from, as long as the device is properly configured, or auto-registration is enabled.
Answer remains the same, the ONLY config on which CUCM might validate the IP from which the request is coming, is a login/logout request from EM. And at that point, the phone has to be already registered.
There is no way to filter IPs from which devices can register in CUCM, and in consequence, no way to tell CUCM to do something to devices that come from other IPs.