Is it possible to perform User Tracking acquistion without CDP enable, the Cisco Switches have been discovered and collected manually without CDP. As such no end hosts have been detected.
Is there a work around
SNMPv3 with 2950 switches does not work in UT. The reason is 12.1 code lacks support for SNMPv3 contexts. You must use v1/v2c in order to get users connected to 2950 switches. In the next release of LMS, Campus will fallback to v2c for these switches, but that will still mean they will need community strings configured.