Correct, only devices which can run 12.2 code can support SNMP contexts. If the 3560 is running 12.2(25)SEE or higher, then you can configure SNMPv3 contexts on it, and UT will be able to get end host data.
It is not possible to configure Campus to use v2 while other apps use v3. However, I have filed a bug which will tell Campus to use v2 for devices which can never support SNMPv3 contexts. This bug was fixed in LMS 3.1.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...