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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 brdge 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 <IP address>/<prefix length> <output-bridge-name> <gw>
To see all routes configured:
ovs-appctl ovs/route/show
To del route:
ovs-appctl ovs/route/del <IP address>/<prefix length>
To look up and display the route for a destination:
ovs-appctl ovs/route/lookup <IP address>
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 <num1> <num2>
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
|
