Understanding Performance Information Gathering

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.

Infoblox advises regular performance polling because interface-level performance statistics are provided to the appliance as counter values. NetMRI tracks differences in performance counter values from poll to poll and uses the deltas to calculate the true interface performance statistics over that time period. A regular time period provides greater granularity to the performance data and minimizes the changes of counter roll-overs.

For switch port management, interface performance statistics collection applies only to ports in Switch and Switch-Router devices.