The Manager checks the statuses of registered devices by using SNMP, ping or unique protocol at intervals of 60 seconds (default). It is as follows which polling method.
Polling Method | Protocol | Devices |
|---|---|---|
Device status | SNMP | ETERNUS Disk storage system |
Communication status | SNMP | PRIMERGY Fibre Channel switch blade |
unique protocol | server nodes for which Agent is installed | |
private protocol | VMware vSphere | |
ping | Devices supporting automatic detection, other than the above devices. |
Device status polling method
For devices using SNMP, the system obtains status information using the respective vendor's private MIB. If the status has been changed compared with that stored by Manager, an event is displayed depends on the change.
Communication status polling method
Changes in device status cannot be detected. However, if an abnormality occurs in the device or in a network between the device and the Manager and there is no response to a communication (non-communicating state), then an event is displayed and the icon color changes to gray. The next time there is a response to polling, the previous state (the one before the non-communicating state) is restored.
For VMware vSphere, this software uses a private protocol of VMware. The communication status polling method does not detect changes in the device status, but does detect the non-communicating status. The polling is performed only for VM hosts; VM guests are not polled. When the non-communicating state is detected for a VM host, this software judges that the VM host and all the VM guests included in it are in the non-communicating state.
With either SNMP or ping, Systemwalker Centric Manager linkage and Shell/bat linkage are enabled by default. The swsag code reported to Centric Manager is 4822. The linkage behavior can be modified. For information see "A.7 Device Polling Setting File".
Users can customize polling intervals, the time at which operation stops, the specification of devices to be excluded from polling operation, and other device polling functions. For details, see "A.7 Device Polling Setting File".
Note
When the device polling detects a change in network or device status, any event of "Device Polling Event" in the Event Guide is displayed. However, when the state change of device is detected by performing the Reload Conf. operation, the following events are not displayed. Confirm the state from Web Console.
In a large-scale environment in which hundreds of devices targeted for polling are registered, not all the devices may be checked within 60 seconds (default). In that case, on the next polling cycle, the devices whose statuses were not checked on the last polling cycle are given priority. The polling interval can be changed. Refer to "A.7 Device Polling Setting File" for details.
