Answer | Dynamic Frequency Selection (DFS) allows the G18/G20 to share the 5GHz Wi-Fi frequency bands with radar systems without causing interference. Radar systems are used mainly at airports, weather stations, and other government locations. When DFS is enabled in the G18/G20 it will monitor the 5GHz Wi-Fi frequency bands. If the radar system frequencies are detected on the current 5 GHz Wi-Fi frequency band the G18/G20 will switch to another channel automatically to prevent interference. Client devices may disconnect and reconnect when switching DFS channels and finding non-DFS channels to connect to.Â
When DFS is enabled Wi-Fi performance may improve as there is less interference on the new 5GHz Wi-Fi frequency bands. Some client devices may not be able to reconnect to the 5 GHz Wi-Fi frequency band, it is recommended to disable DFS.  To use DFS channels the client devices must support DFS. This document describes how to enable DFS.Â
Enable DFS
- Launch a web browser, such as Internet Explorer, Firefox, or Safari.  Enter http://192.168.0.1 into the address box, and press the Enter key.  The https:// Redirect page will appear.  Â
 - The SURFboard Web Manager is redirecting to a more secure connection, click the Proceed button to continue.  The Gateway > Login page will appear.
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 - A security or private risk alert may appear on the web browser advising users to proceed with caution when accessing the Web Manager. There is no risk in proceeding to the Web Manager. For instructions to bypass the alert screen, refer to article # 18181 - Alert Message for Web Manager Access.
NOTE: The Home Network Wizard will appear if this is the first time accessing the Web Manager. For assistance with the wizard, refer to article # 19602 - G18/G20: Web Manager First Time Login.
 - The Username field has admin populated, enter the custom password in the Password field.
NOTE: If the Login page prompts for email address and password, retrieve the email address and password in the app to sign in. For detailed instructions in the app, refer to article # 19069 - SURFboard Central: Web Manager Access.
 - Click the Login button.  The Gateway > Summary page will appear.
 - On the left-hand menu, click the Connection link then click the Wi-Fi link.
 - Click the 5 GHz Radio sub-menu link.  The Gateway > Connection > Wi-Fi > 5 GHz Radio page will appear.Â
 - Click the Enable bullet-point for the DFS option, then click the Save Settings button. Changes take effect immediately.
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