---
title: "Controlling Switched Network Discovery"
canonical: "https://docs.infoblox.com/space/netmri761/1056869087/Controlling%20Switched%20Network%20Discovery"
format: markdown
---
You can manually control the frequency of discovery polling of switched Ethernet networks. To fully discover them, you must define these settings. NetMRI's Switch Port Manager feature governs how L2 and L2/L3 Ethernet switching devices are polled for discovery and data collection. To enable automatic polling through ARP for switched devices (network devices that belong to the Switching and Switch-Router device groups), perform the following:

1. Click the **Settings** icon > **Setup **> **Collection ****and ****Groups **> **Switch ****Port ****Management** side tab.
2. Set the **Periodic ****Polling** time interval. This defines the ARP polling interval for repeated data collection. The default value is 1 Hour.
3. To open the **Advanced Settings** page, click the** Settings** icon > **General ****Settings **> **Advanced ****Settings **> **Discovery** group > **Poll ****ARP ****with ****SPM**, and then choose the **True** option. The setting is set to **False** by default.

> ⚠️ **Note**
> ⚠️ 
> ⚠️ For more details on switch port management settings, see *<span style="color: #0000ff">[<u>Global</u>](https://infoblox-docs.atlassian.net/wiki/spaces/netmri761/pages/1056869622)</span>*<span style="color: #0000ff">[<u> </u>](https://infoblox-docs.atlassian.net/wiki/spaces/netmri761/pages/1056869622)</span>*<span style="color: #0000ff">[<u>Switch</u>](https://infoblox-docs.atlassian.net/wiki/spaces/netmri761/pages/1056869622)</span>*<span style="color: #0000ff">[<u> </u>](https://infoblox-docs.atlassian.net/wiki/spaces/netmri761/pages/1056869622)</span>*<span style="color: #0000ff">[<u>Port</u>](https://infoblox-docs.atlassian.net/wiki/spaces/netmri761/pages/1056869622)</span>*<span style="color: #0000ff">[<u> </u>](https://infoblox-docs.atlassian.net/wiki/spaces/netmri761/pages/1056869622)</span>*<span style="color: #0000ff">[<u>Management</u>](https://infoblox-docs.atlassian.net/wiki/spaces/netmri761/pages/1056869622)</span>*<span style="color: #0000ff">[<u> </u>](https://infoblox-docs.atlassian.net/wiki/spaces/netmri761/pages/1056869622)</span>*<span style="color: #0000ff">[<u>Polling</u>](https://infoblox-docs.atlassian.net/wiki/spaces/netmri761/pages/1056869622)</span>*<span style="color: #0000ff">[<u> </u>](https://infoblox-docs.atlassian.net/wiki/spaces/netmri761/pages/1056869622)</span>*<span style="color: #0000ff">[<u>Settings</u>](https://infoblox-docs.atlassian.net/wiki/spaces/netmri761/pages/1056869622)</span>*.