Hi,
I added a support for GTP, an UDP based tunneling protocol, using generic
tunnel functions in Open vSwitch 1.11.
I tried to test communication through the tunnel with the mininet topology
below :
[h1] ---- [OvS1] ====(GTP tunnel)==== [OvS2] ---- [h2]
h1 and OvS1 are in the same VM. (h2 and OvS2 are in the same VM too).
When I ping h1 -> h2, i can see in wireshark ARP requests, ARP repplies and
ICMP echo requests in GTP but I can't see the ICMP echo replies.
The ping messages are received by eth0 in the second VM but the switch doesn't
forward it to the tunnel port.
I used debug messages to locate the problem and it seems to be the function
ovs_dp_process_received_packet in datapath.c : "flow =
ovs_flow_lookup(rcu_dereference(dp->table), &key);
if (unlikely(!flow)) {...}"
I added the flow rules to forward messages to the right ports but the flow
lookup doesn't .
Can anyone help me to solve this problem?
Thanks,
Arthur
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