PRIMECLUSTER GLS for Windows User's Guide 4.3

2.2.1 Monitor Function

GLS can monitor failures in transmission paths and restored transmission paths.

Monitor Range

You can monitor NICs, cables, and neighboring network devices, as well as communication through those network devices.

Figure 2.3 Monitor Range

Note

In Figure 2.3, the ping monitoring range depends on the IP addresses of SW1 and SW2 being set as the ping monitoring target and Physical Adapter 1 being the operational adapter.

Monitored Items

The items below are monitored based on notifications of their connection status from the physical adapter and on network device communication status.

Failure Monitoring

The following failures can be detected:

• Server adapter failure

• Cable failure

• Failure of network devices that connect to the server

• Communication statuses of network devices

If a failure is detected, the switch function automatically switches from the operational transmission path to the standby transmission path.

Restore Monitoring

GLS can detect when the link status or communication status of a failed physical adapter is restored.

When the restored physical adapter is detected, the switch function automatically makes that adapter available for use.

Table 2.3 details when a failure or restore is detected.

Table 2.3 Detection of Failure or Restore

Physical Adapter Status	Failure Detected	Restore Detected
Operational	When the link status of a physical adapter fails or when the ping monitor has detected a network device communication failure.	When the link status of a physical adapter is restored or when communication is restored after the ping monitor has detected a network device communication failure.
Standby	When the link status of a physical adapter fails.	When the link status of a physical adapter is restored.