---
title: "Performing On-Demand Switch Port Polling"
canonical: "https://docs.infoblox.com/space/netmri754/105942519/Performing%20On-Demand%20Switch%20Port%20Polling"
format: markdown
---
Switch Port Management (SPM) allows on-demand polling for device groups and for the entire managed network. A key use case is to check for changes to switches or switch ports in the network. In most cases, polling globally across the entire network should be discouraged in favor of polling across a single device group. When a polling session takes place, NetMRI commits a record of each polled network entity to the Device History, to the Interface History in the Interface Viewer, and to the Device History of any end devices involved in the group poll.

On-demand polling of switching devices can be executed for the entire switched network or by smaller Device Groups. See the following:

- On the global level, begin polling all switches in the network by choosing **Settings** > **Setup** > **Collection** **and** **Groups** > **Switch** **Port** **Management** side tab and then click **Poll** **Now**. Note that no other polling operations are allowed by NetMRI when this process is being carried out.
- At the device group level, initiate polling for a subset of devices in the managed network by going to the **Settings** icon > **Setup** > **Collection** **and** **Groups** > **Groups** tab, select a group, click **Edit** in the table row, choose the **Switch** **Port** **Management** tab, and then click **Poll** **Now**.

The Device History and Interface History record all polling events for the chosen entities.

NetMRI users can view interface performance statistics In the Switch Port Management page view after the appliance collects all switch forwarding data.