I have successfully installed ciscoworks 2000 LMS include Campus manager 3.1,after that,we meet a problem! what devices we have are all Catalyst 2950,3550,4506 Switch. In campus manager 3.1--topology service---layer 2 view, we can't find any device in topology ;but in my discovery log,we can see all device have been found. through reading doc in www.cisco.com,we found that campus manger 3.1 can't support device such as 2950,3550.what I want to know is 1: is the reason that we can't see the layer 2 topology campus manager version too old?? 2: How can i upgrade the version from 3.1 to 3.3,we have login cisco.com using CCO, but we didn't find any useful pakage,anyone can tell me??? Thank all!!!!