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UniFi - How to add the USW-Ultra to UniFi
UniFi - How to add the USW-Ultra to UniFi

Learn how to get the Ubiquiti USW-Ultra, USW-Ultra-60W and USW-Ultra-210W adopted to UniFi

Alex Lowe avatar
Written by Alex Lowe
Updated over a week ago

The USW-Ultra lineup has three models, but all are capable of the same thing. PoE in or use an external power adaptor and seven PoE switch ports. It can be powered by PoE+, PoE++ or with an optional external power adaptor which is either 60W or 210W.

If you have a USG or UXG on the same UniFi Controller as the USW-Ultra, then no configuration should be required. It'll automatically make itself available within UniFi.

Ubiquiti UniFi USW-Ultra

Because the USW-Ultra doesn't support SSH, the usual manual set-inform method won't work. Getting the USW-Ultra adopted to HostiFi or any other cloud hosted UniFi Controller requires a few more steps.

Using the HostiFi Device Discovery Tool (Recommended)

With the latest version of the HostiFi Device Discovery Tool, you can now adopt switches that don't have an SSH interface, such as the USW-Flex-Mini and the latest USW-Ultra models.

First, download and install the HostiFi Device Discovery Tool. This guide applies to the desktop app, but the mobile app has the same functionality and usability.

Next, plug in your USW-Ultra to the network and open the app

HostiFi Device Discovery Tool

Make sure in settings that your set-inform URL has been specified. It should have http:// and not https://, port :8080 and then /inform at the end. You can find your set-inform URL in the portal.

HostiFi Device Discovery Tool

Next, click on 'Adopt', check the set-inform URL is correct and then click 'Adopt' again

HostiFi Device Discovery Tool

The app will then show a success message that the adoption request has been sent to the UniFi controller.

HostiFi Device Discovery Tool

Next, check your UniFi controller to see if the switch has popped up. Then click 'Click to Adopt'

After a few minutes, the switch will come online in the controller.

DHCP Option 43

Another option is to use DHCP option 43 to provide the public IP address of your UniFi controller in DHCP leases. This method doesn't require a local UniFi controller, but it does require a network with the ability to provide DHCP option 43.

DHCP option 43 is available on any most third party routers such as pfSense, Mikrotik, Palo Alto, as well as Windows DHCP servers. Refer to those manufacturer's instructions on how to enable option 43. Typically, they require the public IP address of your controller to be input in hex format, and prefaced with "0104" followed by the hex value of the IP address. Refer to this Ubiquiti Community thread for more details on using 3rd party DHCP servers.

EdgeRouter DHCP Server

You can also set the UniFi Network IP in the DHCP lease settings if you are using an EdgeRouter. You can find the IP address for your HostiFi UniFi server at Simply add the IP address in the DHCP server settings and any UniFi devices will get pointed to your server.

EdgeOS DHCP Server Settings


If the switch hasn't showed up in the UniFi Controller, make sure to check the following:

  • Check that you have entered http:// and not https://

  • Check that port :8080 has been used and not :8443

  • Check all sites on the controller


HostiFi provides hosting for both Ubiquiti and TP-Link software-defined-networking (SDN) applications, with servers for UniFi, UISP and Omada. We also offer professional networking consulting, with HostiFi Pro.

If you run into any issues, send an email to or contact us via live chat.

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