I have cisco LMS 3.2 installed on the virtual machine. The problem i am facing is that i cannot detect devices automatically behind other vendor devices. I can ping the devices and i can also add manually but i need LMS to discover them automatically because of the large number of devices.
If you can ping them, and if you can communicate with them via SNMP, you can configure the Ping Sweep Discovery module to find these devices automatically. Just specify some subnet ranges to ping. See my document on understanding CSDiscovery for more details: