PRIMECLUSTER Global Link Services Configuration and Administration Guide: Redundant Line Control Function 4.2 (for Linux)

3.6.6.2 Enabling HUB monitoring function

Enable the HUB monitoring function.

Use the "hanetpoll on" command to set up this function. If the "hanetpoll on" command is executed, the ping command is executed on the HUB.

In NIC switching mode, no line failure is assumed until the link up wait time (IDLE (seconds) in Figure 3.3) passes even if the ping command fails. This is because monitoring starts after a physical interface is activated. Time required for link up depends on the HUB type to be connected. If the line monitoring fails although the HUB is not faulty, extend the wait time as required, using the -p parameter of the "hanetpoll on" command.

If the "hanetpoll on" command is executed while the virtual interface with monitoring destination information specified is activated, the router monitoring function is immediately enabled.

If the "hanetpoll" command is executed while the virtual interface with monitoring destination information specified is not activated, the HUB monitoring function is not enabled.

If, after the HUB monitoring function is enabled, the virtual interface with monitoring destination information specified is activated, the HUB monitoring function is not enabled. In this case, disable the HUB monitoring function, activate the virtual interface, and enable the HUB monitoring function again. For more information, see Section "7.7 hanetpoll Command".

[Figure 3.3 Basic sequence of HUB monitoring]

[Figure 3.4 HUB monitoring sequence after detect line fault]