...
You may exclude device groups from Switch Port Management. The switches within the chosen group will not appear in on the Devices page, and their switch ports will not count against the SPM interface license count, or in the Capacity Summary – Ports pane. Switch Port Management will not poll excluded device groups.
...
Infoblox recommends regular collection of interface performance statistics for Switch Port Management-managed systems, differing from the irregular or lengthy time periods used by the automatic collection of switch-forwarding data in the full NetMRI configuration. For information on switched interface management, see Managing Interfaces Through Switch Port Management.
Performance polling can be executed immediately, on demand, with limitations. If someone manually attempts to poll a device group when another poll of the entire network is already running, NetMRI notifies the user that another polling session is already in progress and will not execute the manual request until the current session completes.
...