Hey Prashant, I just repeated your configuration on two machines. And it works.
My ovs is the master branch from here: http://git.openvswitch.org/cgi-bin/gitweb.cgi?p=openvswitch;a=summary """ # eth1 on two machines are directly connected # eth1 on machine1 has address 2.2.2.2 # eth1 on machine2 has address 2.2.2.3 # Below is the script on machine1: vs-vsctl add-br br0 -- add-port br0 eth1 sudo ifconfig br0 2.2.2.2 netmask 255.255.255.0 sudo ifconfig eth1 0 up ovs-vsctl add-br br1 sudo ifconfig br1 11.11.11.25 netmask 255.255.255.0 ovs-vsctl add-port br1 gre0 -- set interface gre0 type=gre options:remote_ip=2.2.2.2 """ Is this the same as yours? If it is, seems to be caused by other misconfig. And you may need to use commands like tcpdump, ovs-dpctl dump-flows, route for debugging. You may refer to this thread for ways of debugging: http://openvswitch.org/pipermail/discuss/2013-July/010440.html Kind Regards, Alex Wang,
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