Devices unreachable after LMS Discovery

[Eng.SohaAfifi]

I'm using LMS 3.2
After discovery only the Backbons switch is reachable while all other devices appear as unreachable
Although I configured snmp Version 2 on all devices, and I can reach all tthose devices from the server and login with the credential I set for LMS

[Duong Nguyen]

Inventory > Device Administration > Add / Import / Manage Devices

Ensure you have the correct credentials in the DCR databse.  Then run a DCR verification