Simpler internal bridge for Xen on Arch using netctl
Just change 'Interface' and 'Dummy' appropriately, and you'll have a nice internal bridge for VMs without having to vswitch things.
Description='internal bridge for xen' Interface=in0 Dummy=dummy0 Connection=bridge IP=no IPCustom=("link add $Dummy type dummy" "link set $Dummy up" "link set $Dummy master $Interface")