Use test failed-ip-network-region to initiate a real-time ping test for failed network-region connections.
The default is that all connections that failed the last background maintenance ping test are tested. If network region x is specified, then just failed connections from region x are tested. If a previously failed connection passes the ping test, then the associated minor alarm is cleared.
To troubleshoot broken connectivity, also see display failed-ip-network-region and change ip-network-region.