Provide the ability to select the expected Up/Down state of a node or interface so that it appears as normal/green if the state is what is expected and alert/red if not.
Justification and single example:
Dealing with switches in NPM there are many times when the expected state of a port is down. For example a 24 port edge switch with two uplinks, 6 security cameras, and the remaining 16 ports down.
The expected state for these 16 ports is down and the problem case is actually if the port goes up.
These ports staying down needs to be monitored.
In NPM the switch incorrectly appears red with problems since these 16 ports are (correctly) showing down.
The option is available in other monitoring solutions, by way of an expected state.
