What is device reachability?

Reachability

The reachability status of a managed device indicates the results of the last reachability check.

A reachability check is a scheduled check that the NSP initiates via the configured protocols. The reachability status parameter in the NSP reflects the results of the reachability check:

• If the NE responds via all configured protocols, it is reachable from the NSP system.

• If more than one protocol is configured and some checks fail and others pass, the NE is partially reachable.

• If all checks fail, the NE is unreachable.

  If the NE becomes unreachable or partially unreachable, an alarm is raised.

For classic NEs, reachability is determined by the ping result of the active management IP address. This can be the in-band or out-of-band IP address: if the active management IP address is the in-band IP address, the in-band reachability policy will be used to perform reachability checks, and vice versa.