| PRIMECLUSTER Global Link Services Configuration and Administration Guide: Redundant Line Control Function 4.1 (for Solaris(TM) Operating System) |
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Contents
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| Chapter 2 Feature description | > 2.2 Option Functions | > 2.2.7 Router/HUB monitoring function | > 2.2.7.2 HUB monitoring function |
If the operation starts using the HUB-to-HUB monitoring function, the secondary HUB (HUB2 in the figure 2.33) is monitored using the ping command.
When a failure is detected on the secondary hub, HUB-to-HUB monitoring function starts polling the primary hub, as well as polling the secondary hub (Swutch/HUB1 in Figure 2.33).
(During this occasion, a monitoring failure message (No.873) regarding the secondary HUB will be outputted. Use this message to investigate the cause of the failure.)
Once the polling process on the primary HUB starts, this function then monitors both secondary and primary HUBs interchangeably. Monitoring process against the secondary HUB is recovery monitoring and it will stop monitoring the primary HUB when HUB-to-HUB monitoring function detects recovery of the secondary HUB. HUB-to-HUB monitoring function determines transfer path failure by checking the number of monitoring failures (the default is 5 times). If failures were detected repeatedly on both primary and secondary HUBs, then it determines there was transfer path failure. Note that a message (No.873) will be reported regarding the failure on the secondary HUB, therefore it is possible to recover the secondary HUB before the primary HUB switches to secondary HUB.
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