Configuring a default network brige when installing KVM killed networking
 

I've just installed SLES 11 SP1 on a test server and installed KVM through YaST. About half way through it prompted me to configure a default network bridge, I clicked yes and lost my VNC connection. I now can't ping either of the 2 interfaces. If bridging renders an interface unusable for normal use how can I tell it to only use one specific adapter?

you can configure the networing manuly or if you want you can remove on of the 2 bridge you created

When an interface is connected in a bridge, no IP is on the interface (you can set an IP in config, but it does nothing).

Virtual machines use bridge very often. The interfaces are in a bridge in host and you can put them IPs in guests.

However, there is a question about IP on the host. You can put an IP on the bridge.

If you really want to delete bride user brtctl command:
brctl delif br0 eth0
brctl delif br0 wlan0
brctl delif br0 vif0
... remove interfaces from the bride br0

brctl delbr br0
... delete the bridge br0

see 'man brctl'

See more: http://wiki.libvirt.org/page/Networking