A standby patrol function monitors the condition of the deactivated actual interface of a standby system in NIC switching mode.
This brings the following effects:
A message will be reported to an administrator when a failure occurs in standby interface. Therefore, even if a failure already occurred in operation interface, an administrator aware of the failure occurred in the standby interface so that switching can be prevented.
It is possible to fail-back automatically, when the standby interface recovers after switching to previous operation. (Automatic fail-back feature.)
When the transfer path monitoring feature stops due to a failure in every one of the transfer paths, standby patrol feature allows to recover transfer path monitoring feature automatically.
Standby patrol starts when activated a system and when processed activation of the corresponding NIC switching mode, and stops automatically when a system stopped or when processed deactivation of the corresponding NIC switching mode. It is possible to operate manually. See "7.10 strptl Command" for starting standby patrol manually and "7.11 stpptl Command" for stopping standby patrol.
See "2.2.10 Automatic fail-back function" for an automatic fail-back function.
Figure 2.37 Standby patrol function
Note
This feature is available exclusively for NIC switching mode. Modes such as Fast switching mode, RIP mode, and GS/SURE linkage mode do not have standby interface. Thus, this feature does not apply to these modes.
