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 brdge 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:
32 | int-br | 192.168.1.2/24
33 +--------------+ +--------------+
35 +--------------+ +--------------+
41 | br-eth1 | 172.168.1.2/24
42 +--------------+ +---------------+
43 | eth1 |----------------------------------| eth1 |
44 +--------------+ +----------------
46 Host A with OVS. Remote host.
48 With this setup, ping to VXLAN target device (192.168.1.2) should work
49 There are following commands that shows internal tables:
51 Tunneling related commands:
52 ===========================
55 ovs-appctl ovs/route/add <IP address>/<prefix length> <output-bridge-name> <gw>
56 To see all routes configured:
57 ovs-appctl ovs/route/show
59 ovs-appctl ovs/route/del <IP address>/<prefix length>
60 To look up and display the route for a destination:
61 ovs-appctl ovs/route/lookup <IP address>
64 To see arp cache content:
65 ovs-appctl tnl/arp/show
67 ovs-appctl tnl/arp/flush
69 To check tunnel ports listening in vswitchd:
70 ovs-appctl tnl/ports/show
72 To set range for VxLan udp source port:
74 ovs-appctl tnl/egress_port_range <num1> <num2>
76 ovs-appctl tnl/egress_port_range
78 To check datapath ports:
81 To check datapath flows:
82 ovs-appctl dpif/dump-flows