1 Native Tunneling in Open vSwitch userspace
2 ------------------------------------------
4 Open vSwitch supports tunneling in userspace. Tunneling is implemented in
5 platform independent way.
9 Setup physical bridges for all physical interfaces. Create integration bridge.
10 Add VXLAN port to int-bridge. Assign IP address to physical bridge where
11 VXLAN traffic is expected.
15 Connect to VXLAN tunnel endpoint logical ip: 192.168.1.2 and 192.168.1.1.
17 Configure OVS bridges as follows.
19 1. Lets assume 172.168.1.2/24 network is reachable via eth1 create physical bridge br-eth1
20 assign ip address (172.168.1.1/24) to br-eth1, Add eth1 to br-eth1
21 2. Check ovs cached routes using appctl command
22 ovs-appctl ovs/route/show
23 Add tunnel route if not present in OVS route table.
24 ovs-appctl ovs/route/add 172.168.1.1/24 br-eth1
25 3. Add integration bridge int-br and add tunnel port using standard syntax.
26 ovs-vsctl add-port int-br vxlan0 -- set interface vxlan0 type=vxlan options:remote_ip=172.168.1.2
27 4. Assign IP address to int-br, So final topology looks like:
31 | int-br | 192.168.1.2/24
32 +--------------+ +--------------+
34 +--------------+ +--------------+
40 | br-eth1 | 172.168.1.2/24
41 +--------------+ +---------------+
42 | eth1 |----------------------------------| eth1 |
43 +--------------+ +---------------+
45 Host A with OVS. Remote host.
47 With this setup, ping to VXLAN target device (192.168.1.2) should work
48 There are following commands that shows internal tables:
50 Tunneling related commands:
51 ===========================
54 ovs-appctl ovs/route/add <IP address>/<prefix length> <output-bridge-name> <gw>
55 To see all routes configured:
56 ovs-appctl ovs/route/show
58 ovs-appctl ovs/route/del <IP address>/<prefix length>
59 To look up and display the route for a destination:
60 ovs-appctl ovs/route/lookup <IP address>
63 To see arp cache content:
64 ovs-appctl tnl/arp/show
66 ovs-appctl tnl/arp/flush
68 To check tunnel ports listening in vswitchd:
69 ovs-appctl tnl/ports/show
71 To set range for VxLan udp source port:
73 ovs-appctl tnl/egress_port_range <num1> <num2>
75 ovs-appctl tnl/egress_port_range
77 To check datapath ports:
80 To check datapath flows:
81 ovs-appctl dpif/dump-flows