Selecting Status Polling in the left panel of the Options tab provides the following view, where you can specify options that determine how ExtremeCloud IQ Site Engine polls devices. ExtremeCloud IQ Site Engine uses the polling options and poll groups defined here to contact the devices and update tree information. When a device is added to the ExtremeCloud IQ Site Engine database using the Add Device menu option or a device discover, it is added to the default poll group selected here. (A device discover lets you assign devices to any of the three poll groups.) Reassign individual devices or device groups to a different poll group using the Configure Device window. These settings apply to all users. You must be assigned the appropriate user capability to configure these options.
Changing a value from the system default causes a Default Value button to appear. Selecting this button changes the field back to the system default value.
Events
When the Send Down SNMP Event on Timeout ONLY option is selected, only SNMP timeout errors result in a Contact Lost device status. All other SNMP errors are reported as informational events in the Alarms and Events > Events tab and do not cause the device status to be marked as "down" with a red down arrow.
Ping
Use these options to configure status polling settings for devices whose poll type is set to Ping.
- Length of Ping Timeout
- The amount of time ExtremeCloud IQ Site Engine waits before trying to ping a device again. The default setting is 3 seconds. The maximum value for this field is 60 seconds.
- Maximum Devices to Contact at Once
- The maximum number of IP addresses that ExtremeCloud IQ Site Engine attempts to contact simultaneously. The maximum value for this field is 1,000.
- Number of Ping Retries
- The number of attempts made to ping a device. The default setting is 3 retries, which means ExtremeCloud IQ Site Engine retries a timed-out request three times, making a total of four attempts to contact a device. The maximum value for this field is 10.
Poll Groups
- Status Only Poll Interval
- The frequency with which ExtremeCloud IQ Site Engine contacts devices for which you only need to monitor their status. The default polling interval for Status Only devices occurs every 12 hours. Status Only devices do not support collection of statistics, FlexViews, Network Status Monitor, map links, or enforcement via ExtremeCloud IQ Site Engine. You can add a maximum of 10,000 Status Only devices in ExtremeCloud IQ Site Engine, which do not count against your licensed device limit.
There are three distinct poll groups, and each device belongs to one of the three groups. Use these settings to poll critical devices at a more frequent interval, while polling non-essential devices less frequently. The poll frequency for each group specifies the actual length of the poll cycle. Set the interval for poll groups according to your network's needs using the guidelines below.
Select one group as the default poll group in the Default Group drop-down list. When a device is added to the ExtremeCloud IQ Site Engine database using the Add Device menu option or a CDP seed IP discover, it is added to the default poll group selected here. (IP range discover lets you assign devices to any of the three poll groups.) You can also assign individual devices or device groups to a specific poll group using the Configure Device window.
The overall density of polling for devices whose poll type is set to Ping and SNMP is controlled by the Maximum Devices to Contact at Once setting in the Ping and SNMP section, respectively. This determines the maximum number of devices from each group polled at any given time. ExtremeCloud IQ Site Engine always attempts to poll up to the maximum number of devices until all of the devices in the three groups are polled. As responses are received and devices are removed from the poll queue, other devices are added to the queue. After all the devices are polled, ExtremeCloud IQ Site Engine stops polling and batches information to update clients.
If the Maximum Devices to Contact at Once is set too high, such that the poll density is too high, system performance degrades quickly. The optimal poll setting is dependent on many factors including, but not limited to, CPU speed, RAM, and network devices. As the number of devices that you are polling increases, reduce the poll density (Maximum Devices to Contact at Once) to increase performance.
The default Maximum Devices to Contact at Once setting and poll group intervals provided as defaults are a good starting point. If necessary, adjust the values to optimize status polling for your network.
SNMP
Use this option to configure status polling settings for devices whose poll type is set to SNMP.
- Maximum Devices to Contact at Once
- The maximum number of IP addresses that ExtremeCloud IQ Site Engine attempts to contact simultaneously. The maximum value for this field is 1,000.
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