[libvirt-users] OpenVswitch with KVM virtual machines

Hey, I have KVM installed on my Fedora 17 box. I added the network interfaces of the virtual machines to the openvswitch bridge as follows: ____ ____ / VM1\______br0_______/ em1\ \____/ | \____/ | _|_ /VM2\ \____/ virbr0 is the virtual network switch VM1 and VM2 are on the same subnet having tap interfaces vnet0 and vnet1 respectively. em1 is the default network interface. $sudo ovs-vsctl add-br br0 $sudo ovs-vsctl add-port br0 em1 $sudo ifconfig br0 <ip address of em1> $sudo ip route del default dev em1 $sudo ip route add default dev br0 (Using the above commands, I was able to connect to the internet) $sudo brctl delif virbr0 vnet0 $sudo ovs-vsctl add-port br0 vnet0 $sudo brctl delif virbr0 vnet1 $sudo ovs-vsctl add-port br0 vnet1 $brctl show bridge name bridge id STP enabled interfaces virbr0 8000.52540094e45e yes virbr0-nic vnet0 vnet2 $sudo ovs-vsctl show Bridge "br0" Port "vnet1" Interface "vnet1" Port "br0" Interface "br0" type: internal Port "vnet0" Interface "vnet0" Port "em1" Interface "em1" ovs_version: "1.4.0" $ifconfig em1 em1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.66.97.253 netmask 255.255.254.0 broadcast 10.66.97.255 inet6 fe80::226:55ff:fe3e:971c prefixlen 64 scopeid 0x20<link> ether 00:26:55:3e:97:1c txqueuelen 1000 (Ethernet) RX packets 194955 bytes 81216930 (77.4 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 53004 bytes 9477482 (9.0 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 device interrupt 19 memory 0xf0200000-f0220000 $ifconfig br0 br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.66.97.253 netmask 255.0.0.0 broadcast 10.255.255.255 inet6 fe80::226:55ff:fe3e:971c prefixlen 64 scopeid 0x20<link> ether 00:26:55:3e:97:1c txqueuelen 0 (Ethernet) RX packets 84745 bytes 60302978 (57.5 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 44528 bytes 7732040 (7.3 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 By default, the OVS should act as a MAC-layer learning switch. However, the VMs which are in the same subnet can ping each other but the VMs can't ping the host machine (10.66.97.253) & viceversa. Can you tell me where am I wrong in my approach? Thanks and regards, Neha.