+Q: How do I connect two bridges?
+
+A: First, why do you want to do this? Two connected bridges are not
+ much different from a single bridge, so you might as well just have
+ a single bridge with all your ports on it.
+
+ If you still want to connect two bridges, you can use a pair of
+ patch ports. The following example creates bridges br0 and br1,
+ adds eth0 and tap0 to br0, adds tap1 to br1, and then connects br0
+ and br1 with a pair of patch ports.
+
+ ovs-vsctl add-br br0
+ ovs-vsctl add-port br0 eth0
+ ovs-vsctl add-port br0 tap0
+ ovs-vsctl add-br br1
+ ovs-vsctl add-port br1 tap1
+ ovs-vsctl \
+ -- add-port br0 patch0 \
+ -- set interface patch0 type=patch options:peer=patch1 \
+ -- add-port br1 patch1 \
+ -- set interface patch1 type=patch options:peer=patch0
+
+ Bridges connected with patch ports are much like a single bridge.
+ For instance, if the example above also added eth1 to br1, and both
+ eth0 and eth1 happened to be connected to the same next-hop switch,
+ then you could loop your network just as you would if you added
+ eth0 and eth1 to the same bridge (see the "Configuration Problems"
+ section below for more information).
+
+ If you are using Open vSwitch 1.9 or an earlier version, then you
+ need to be using the kernel module bundled with Open vSwitch rather
+ than the one that is integrated into Linux 3.3 and later, because
+ Open vSwitch 1.9 and earlier versions need kernel support for patch
+ ports. This also means that in Open vSwitch 1.9 and earlier, patch
+ ports will not work with the userspace datapath, only with the
+ kernel module.
+