Administrators or tenant administrators can add or remove a relationship between a specific device collection and the monitoring profiles in the system. This ability lets you start or stop polling the statistics that are associated with a monitoring profile in relation to the devices and components in a device collection.
Important! When you assign monitoring profiles to device collections, significant SNMP requests can occur. These requests can impact the device performance. Also, do not associate monitoring profiles with the All Devices device collection. Doing so can cause extra SNMP requests being made to pingable-only devices, and can result in sporadic metric family support.
For example, you have a discovered router with 1000 physical and logical interfaces. You also created an interface monitoring profile and you set the poll rate on that monitoring profile to one minute. If the interface monitoring profile is assigned to the device collection that your router is in, ten MIB objects are polled for each interface. This setting induces a rate of 166 MIB objects per second for the SNMP agent to reply to. This significant SNMP load can impact the performance of the router.
Metric families such as QoS, MPLS, and IPSLA can also contribute to significant SNMP requests. For more information on the implications and restrictions of SNMP requests to your network devices, refer to the vendor manuals or contact the vendor.
Note: Data Aggregator uses the fastest poll rate that is configured when multiple device collections are assigned to a monitoring profile. Remove the factory monitoring profile associations with device collections when you want your custom poll rate used.
Follow these steps:
A list of collections appears. Administrators can view the device collections for the tenant they are administering. A tenant administrator can view its own (tenant) list of device collections.
A list appears that shows monitoring profiles that are assigned to the selected device collection.
The Assign Collection Monitoring Profiles dialog opens.
The selected monitoring profiles move to the Assigned Monitoring Profiles list.
Associating a monitoring profile to a device collection activates the event rules that are included in the monitoring profile. Events are raised and cleared when the devices in the device collection satisfy event rule conditions.
The selected monitoring profiles move to the Available Monitoring Profiles list.
Note: Removing the relationship does not remove the monitoring profiles from the system.
Your changes are saved, and can be verified by repeating step 2.
Filtering specifies the component items to be polled, and the time interval at which they are polled. Specifying which component items to poll lets you monitor only those items that interest you. For your custom monitoring profile, you can specify additional filters.
You can add or edit a filter before or after you run a discovery. Data Aggregator applies filtering after discovery. Only the component items that match the filter criteria are polled. If you add or edit a filter after you run a discovery, polling on these component items stops.
Note: Log in as the administrator to perform this task.
Follow these steps:
The details for the selected monitoring profile appear in the pane on the right. The metric family tab is selected by default.
The Edit Filter and Clear Filter buttons at the bottom of the pane become available.
The Filter Expression dialog appears.
The condition that you have created is added to the filter expression.
Add each condition by clicking the Add Condition button.
Note: When viewing component items, and the filters assigned to them, an asterisk (*) appears next to each component item that does not have any filters assigned to it.
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