we are facing issue with IP phones and they lost connectvity and start upgrading.found some errors on the switch logs,TB-5-TRUST_DEVICE_LOST: cisco-phone no longer detected on port Gi7/2, operational port trust state is now untrusted.Jan  17 15:03:05...

Hi All,I have to upgrade many of the 4500, 3700, and many more switches to some latest and stable code but to find IOS for each device is littile pain , so someone can help me with any tool which help to compare the IOS image with feature set and oth...