[ovs-discuss] GRE port mirroring in OVS

[Ben Pfaff]

Did you read the FAQ?

Q: How do I configure mirroring of all traffic to a GRE tunnel?

A: The following commands configure br0 with eth0 and tap0 as trunk
   ports.  All traffic coming in or going out on eth0 or tap0 is also
   mirrored to gre0, a GRE tunnel to the remote host 192.168.1.10; any
   traffic arriving on gre0 is dropped:

       ovs-vsctl add-br br0
       ovs-vsctl add-port br0 eth0
       ovs-vsctl add-port br0 tap0
       ovs-vsctl add-port br0 gre0 \
           -- set interface gre0 type=gre options:remote_ip=192.168.1.10 \
           -- --id=@p get port gre0 \
           -- --id=@m create mirror name=m0 select-all=true output-port=@p \
           -- set bridge br0 mirrors=@m

   To later disable mirroring and destroy the GRE tunnel:

       ovs-vsctl clear bridge br0 mirrors
       ovs-vcstl del-port br0 gre0