I have 7911 ip phone which are not registering to CUCM once I connected it to SG300 switch when I connect the phone to 2960 switch the phone register normally and works fine.
I already tested another phones like 7975 and 7841 with SG300 sw...
I'm trying to upgrade my uc320 using this link through wan:http://firmware.ciscosbs.com/CloudAssistedUpgrader.htmlAnd I can see that its trying to upgrade from 2.0.1(8) to 2.0.12(9) with three steps:1. downloading firmware2. upgrading firmware3. rest...
Dears, Issue occurred again :)
After reproducing and testing seems that it's bug behavior on SG300 switch.
in order for 7911 phones to work you must login to switch and apply smartport setting for phone interface and select "Phone+Desktop"
Dears problem solved, we changed the CUCM name to IP under System > Servers
after that phones were able to register.
Thats strange don't know why 7970 and 7821 were not affected and only 7911 having the issue.