Hi,
I’m not sure about SNMP, I believe check_mk discovery is part of the agent. But someone correct me if I’m wrong.
As for the hosts with the agent, are you referring to the fact that you don’t see Discovery in the WATO configuration? That’s correct, it won’t show up there. But it’s still there in the background. You see if it works by creating a new service on the client that should be picked up by discovery. If you’re on Linux, for example, mount something over NFS or create a tempoary filesystem. In no time you should get a warning from Check_MK Discovery.
Louis