The below adds a temporary bridge for our management network. This will not survive a server reboot. If you want the bridge to be available after a server reboot, there's plenty of documentation out there for adding these permanently.
sudo brctl addbr br-oob
sudo ifconfig br-oob up
sudo ip address add 192.168.2.1/24 dev br-oob
If you're using NDFC under KVM, NDFC expects a data network, in addition to the above management network.
sudo brctl addbr br-vnd
sudo ifconfig br-vnd up
sudo ip address add 192.168.3.1/24 dev br-vnd