+AT_CHECK([RUN_OVS_VSCTL([--may-exist add-br xapi1])], [1], [],
+ [ovs-vsctl: "--may-exist add-br xapi1" but xapi1 is a VLAN bridge for VLAN 9
+], [OVS_VSCTL_CLEANUP])
+AT_CHECK([RUN_OVS_VSCTL([--may-exist add-br xapi1 xxx 9])], [1], [],
+ [ovs-vsctl: "--may-exist add-br xapi1 xxx 9" but xapi1 has the wrong parent xenbr0
+], [OVS_VSCTL_CLEANUP])
+AT_CHECK([RUN_OVS_VSCTL([--may-exist add-br xapi1 xenbr0 10])], [1], [],
+ [ovs-vsctl: "--may-exist add-br xapi1 xenbr0 10" but xapi1 is a VLAN bridge for the wrong VLAN 9
+], [OVS_VSCTL_CLEANUP])