In NIC switching mode, you can define the following by the standby patrol function.
"automatically perform fail-back immediately after recovering the faulted transfer path"
"perform fail-back when the transfer path currently used encounters a failure"
For information on the setup, Figure 2.32 Automatic fail-back function (continued) and Figure 2.33 Automatic fail-back function (end) show the outline of the automatic fail-back function.
Figure 2.32 Automatic fail-back function (continued)
Figure 2.33 Automatic fail-back function (end)
When a device other than HUB is specified as a monitoring target device, occasionally automatic fail-back is not immediately executed after the faulted transfer path is recovered, depending on where an error occurred in a transfer route. Therefore, make sure to specify HUB as a monitoring target device to execute immediate fail-back.
Note
After the failed interface is recovered, if a running interface fails before the Standby patrol detects the No.885 message indicating interface recovery, NIC switchback will not be executed. If this occurs, the Standby patrol will consider that both of the NICs are disabled until it detects the failed interface recovery. Recover the interface referring to "4.6.2 Recovery procedure from line failure in NIC switching mode".
When the Standby patrol, whose function is set to execute immediate automatic fail-back, recovers with HUB monitoring set to off, fail-back is not executed even by setting HUB monitoring to on later.
