I just installed OMSA (OpenManage Enterprise) server and completed configuration. I also added a few servers successfully via idrac.

I am trying to add N3024 switch this time but couldn't figure out how. I keep receive below error/info.

Discovery task Discovery-202009211450077 last updated by admin completed execution at Mon Sep 21 04:53:46 AEST 2020 No devices were discovered. 

 Can somebody instruct me step by step please.