The value of tmnxMobGwNtfyGtpPriSvrReasonCode indicates the reason
why the GPRS Tunneling Protocol (GTP) Prime Server connection has been
brought down.
The value of 'none' indicates that the connection is active.
The value of 'unknown' indicates that the reason is not known.
The value of 'shutdown' indicates that the peer is not referenced by
the mobile gateway in service.
The value of 'remoteDisconnect' indicates that the remote side has
closed the connection.
The value of 'localDisconnect' indicates that the local side has closed
the connection after the dead-timer is expired.
The value of 'peerActive' indicates that a peer is active.
The value of 'peerActive' indicates that a peer is idle.