I have CCM 4.2 with CER 2.0. I have situations where I have shared extensions with 7940/7960/7921. I think that I'll have to manually enter the 7921s in since they cannot be tracked. I can't use subnet because there is only one subnet for wireless which spans multiple buildings.
Question is, will CER work with shared extensions? If I manually configure a 7921 in the system, with an extension that exists on a 7940, will there be conflict? They will reside in the same ERL.
Also, is there a way to just identify the port where the Access Point is connected to catch all my 7921 phones? Or must I manually enter them?