Device Discovery results with Unknown Model Classes.
Release : 10.4.1
Component : Spectrum Core / SpectroSERVER
The device/host is not responding to SNMP request.
Engage the device/host administrator to check the SNMP agent.
Use the sapwalk2 utility to check the device/host is responding to SNMP requests.
https://knowledge.broadcom.com/external/article?articleId=13592