I'm not seeing that switch under the supported devices on [URL] I would advise you to upgrade to the OME 2.2.
Hello, we use OpenManage Essentials v 2.1 to monitor our servers and switches. Now we a N1548 switch but in OME it is not getting classified as a switch. In the webinterface of the switch I configured SNMP which is correctly set in OME. Can you help me to classify thw switch in OME?  Thank you.
How to discover Dell N1500 Series