Symptom:
In an environment where Virtual NIC mode is used, the communication is not switched even when the switch of HUB monitoring (ping monitoring) is turned off.
Corrective action:
Check the monitoring status of the standby patrol by the "dsppathmon" command. If the monitoring status is ACTIVE, the standby patrol function is operating normally. Therefore, switching of the communication does not occur.
# /opt/FJSVhanet/usr/sbin/dsppathmon Status Name VLAN Primary Target/Secondary Target Patrol +------+------+----+-------------------------------------------+------+ ON sha0 u/t 192.168.70.100(FAIL)/192.168.70.101(WAIT) ACTIVE |
In Virtual NIC mode, if both HUB monitoring and the standby patrol fail, switching of the communication occurs. By combining different two monitoring methods, unnecessary communications are suppressed
Examples for "when the communication is not switched" and "when the communication is switched" are shown below.
Example
When the communication is not switched
In the case of Figure F.1 When the communication is not switched, HUB monitoring fails, but the standby patrol is normal. In this case, switching of the communication does not occur even if the communication is switched from eth0 to eth1, because the communication with HUB3 is not available.
Figure F.1 When the communication is not switched
Example
When the communication is switched
In the case of Figure F.2 When the communication is switched (1) and Figure F.3 When the communication is switched (2), both HUB monitoring and the standby patrol fail. In this case, the communication with HUB3 becomes available by switching the communication from eth0 to eth1.
Figure F.2 When the communication is switched (1)
Figure F.3 When the communication is switched (2)
