Native Tunneling in Open vSwitch userspace ------------------------------------------ Open vSwitch supports tunneling in userspace. Tunneling is implemented in platform independent way. Setup: ====== Setup physical bridges for all physical interfaces. Create integration bridge. Add VXLAN port to int-bridge. Assign IP address to physical bridge where VXLAN traffic is expected. Example: ======== Connect to VXLAN tunnel endpoint logical ip: 192.168.1.2 and 192.168.1.1. Configure OVS bridges as follows. 1. Lets assume 172.168.1.2/24 network is reachable via eth1 create physical bridge br-eth1 assign ip address (172.168.1.1/24) to br-eth1, Add eth1 to br-eth1 2. Check ovs cached routes using appctl command ovs-appctl ovs/route/show Add tunnel route if not present in OVS route table. ovs-appctl ovs/route/add 172.168.1.1/24 br-eth1 3. Add integration bridge int-br and add tunnel port using standard syntax. ovs-vsctl add-port int-br vxlan0 -- set interface vxlan0 type=vxlan options:remote_ip=172.168.1.2 4. Assign IP address to int-br, So final topology looks like: 192.168.1.1/24 +--------------+ | int-br | 192.168.1.2/24 +--------------+ +--------------+ | vxlan0 | | vxlan0 | +--------------+ +--------------+ | | | | | | 172.168.1.1/24 | +--------------+ | | br-eth1 | 172.168.1.2/24 +--------------+ +---------------+ | eth1 |----------------------------------| eth1 | +--------------+ +---------------+ Host A with OVS. Remote host. With this setup, ping to VXLAN target device (192.168.1.2) should work There are following commands that shows internal tables: Tunneling related commands: =========================== Tunnel routing table: To Add route: ovs-appctl ovs/route/add / To see all routes configured: ovs-appctl ovs/route/show To del route: ovs-appctl ovs/route/del / To look up and display the route for a destination: ovs-appctl ovs/route/lookup ARP: To see arp cache content: ovs-appctl tnl/arp/show To flush arp cache: ovs-appctl tnl/arp/flush To check tunnel ports listening in vswitchd: ovs-appctl tnl/ports/show To set range for VxLan udp source port: To set: ovs-appctl tnl/egress_port_range Shows Current range: ovs-appctl tnl/egress_port_range To check datapath ports: ovs-appctl dpif/show To check datapath flows: ovs-appctl dpif/dump-flows Contact ======= bugs@openvswitch.org