If we want to remove the bridge we first have to reverse what we did to create it. Firstly there should be nothing attached to the bridge when we delete it. Also, the bridge must not have any IP addresses assigned to it, or we wont actually be able to delete it at all. We then need to delete the tun device we created, and put the correct network settings back for eth0.

# ifconfig uml-bridge down

# brctl delif uml-bridge eth0
# brctl delif uml-bridge uml-conn0
# brctl delbr uml-bridge

# tunctl -d uml-conn0

# ifconfig eth0 192.168.0.100 netmask 255.255.255.0 up