Create a Network Bridge in TrueNAS Scale

From 25.10 (Goldeye) a bridge is no longer required.

For Docker Apps (Containers)

Containers allow you to configure a MACVLAN NIC, which creates a virtual interface based on an existing physical one. The assigned unique MAC address allows the instance to appear as a separate device on the network. No bridge required. TrueNAS

For VMs — Use the Automatic Bridge (Easiest Option)

Leave Use default network settings selected while creating a new instance to allow TrueNAS to automatically assign the default network bridge. This is the simplest way to allow communication between containers and the TrueNAS host. TrueNAS

TrueNAS Goldeye handles the bridge automatically — you don’t need to manually create one.

If You Still Want a Manual Bridge — The Official Process

The docs confirm the correct order, and critically say to stop everything first:

Before making network interface changes: Stop running apps. Power off running virtual machines (VMs) and containers. Remove active NIC devices for VMs and containers. TrueNAS

Then:

1. Go to System > Network, edit eno2 and click the X next to Static IP Addresses to remove it, then click Save (this queues a pending change)
2. Click Add Interface, set Type to Bridge, assign the IP address and add eno2 as the bridge member
3. Click Test Changes and confirm within 60 seconds