For network monitoring, you have to configure the HUBs that are to be monitored. For details, see "7.12 hanetpathmon Command". Since the standby patrol is automatically activated, setting is not required.
When network monitoring is running, stop monitoring temporarily. Use the "hanetpathmon off" command for this setting.
Set the monitoring destination for HUB monitoring. Use the "hanetpathmon target" command for this setting.
Enable the network monitoring function. Use the "hanetpathmon on" command for this setting.
This section describes the transfer route error detection sequence of the network monitoring function.
Error detection time:
The time required for the network monitoring function to detect an error after it has occurred at the monitoring target is shown below. Immediately after starting network monitoring, however, the formulas do not apply, since error detection is delayed for at least 45 seconds, taking into account the linkup delay time of the HUB.
Monitoring interval is 2 or more seconds:
Error detection time = monitoring interval (in seconds) X (monitoring frequency - 1) + time out period (2 seconds) + (0 to monitoring interval (in seconds)) |
Monitoring interval is 1 second:
Error detection time = time out period (2 seconds) X monitoring frequency + (0 to 1 (in seconds)) |
Example 1) Default setting (3 seconds interval and 5 times):
3 sec x (5 time -1) + 2 sec + (0 to 3 sec) = 14 to 17 sec
Example 2) 1 second interval and 1 time:
2 sec x 1 time + (0 to 1 sec) = 2 to 3 sec
Example 3) 10 seconds interval and 3 times:
10 sec x (3 time -1) + 2 sec + (0 to 10 sec) = 22 to 32 sec
Information
Since network monitoring is performed at regular intervals (in seconds), the maximum interval of time is required between the time the monitoring destination fails and the time the next monitoring is performed. Therefore, it takes at least 14 seconds and up to 17 seconds to detect the failure after a failure has occurred by the default setting.
Figure 3.15 Transfer route error detection sequence by network monitoring function
This section describes the transfer route recovery detection sequence of the network monitoring function.
Recovery detection time:
The following shows time required for going back to the normal monitoring after recovery of a monitoring target is detected in the recovery monitoring by the standby patrol of the network monitoring function and time required for performing the automatic fail-back:
When monitoring interval is 2 or more seconds:
Recovery detection time = monitoring interval (in seconds) X (recovery monitoring frequency - 1) + (0 to monitoring interval (in seconds)) |
When monitoring interval is 1 second:
Recovery detection time = response time (1 to 2 seconds) X recovery monitoring frequency + (0 to 1 (in seconds)) |
Example 1) Default setting (3 seconds interval and 2 times):
3 sec x (2 time -1) + (0 to 3 sec) = 3 to 6 sec
Example 2) 1 second interval and 1 time:
(1 to 2 sec) = 1 time + (0 to 1 sec) = 1 to 3 sec
Example 3) 10 seconds interval and 3 times:
10 sec x (3 time -1) + (0 to 10 sec) = 20 to 30 sec
Figure 3.16 Transfer route recovery detection sequence by network monitoring function
