The cause of the last MSM failover. never(1) means an
MSM Failover has not occurred since the last reboot.
admin(2) means the failover was initiated by the user.
exception(3) means the former master MSM encountered a
software exception condition. removal(4) means the master
MSM was physically removed from the chassis. hwFailure(5)
means a diagnostic failure was detected in the master MSM.
watchdog(6) means that the master MSM hardware watchdog
timer expired. keepalive(7) means the master MSM failed to
respond to slave keepalive requests. The MSM failover will
have been hitless only in the admin(2) and exception(3)
cases