I'm quite new to both network and open vswitch, I'm not sure whether this question is more relevant to open vswitch or gre.
belows are my ovs setting commands. There are two hosts. Each host has two bridge br1 and br2. br2 has the gre tunnel interface which has ip of br1 as its remote end point. host A sudo ifconfig eth1 0 sudo ovs-vsctl add-br br1 sudo ovs-vsctl add-br br2 sudo ovs-vsctl add-port br1 eth0 sudo ifconfig br1 192.168.1.155 netmask 255.255.255.0 sudo ifconfig br2 10.1.1.1 netmask 255.255.255.0 sudo ovs-vsctl add-port br2 gre0 -- set interface gre0 type=gre options:remote_ip=192.168.1.152 hostB sudo ifconfig eth1 0 sudo ovs-vsctl add-br br1 sudo ovs-vsctl add-br br2 sudo ovs-vsctl add-port br1 eth0 sudo ifconfig br1 192.168.1.152 netmask 255.255.255.0 sudo ifconfig br2 10.1.1.2 netmask 255.255.255.0 sudo ovs-vsctl add-port br2 gre0 -- set interface gre0 type=gre options:remote_ip=192.168.1.155 How does GRE traffic find their way after arrive its remote end point?. It looks like that there are no connection between br1 and br2 at the same host. I could understand how traffic from br2 at host A go through br1 at host B. But I couldn't understand traffic finds way to br2 at host B from br1 at host B(gre destination). Are there any implicit connection between bridges at same host? I thought they would be isolated. if there are no rules are specified. Thanks
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