[ovs-discuss] Ping works, regular network traffic does not.

[Jesse Gross]

On Fri, Mar 8, 2013 at 1:17 AM, Robert van Leeuwen
<Robert.vanLeeuwen at spilgames.com> wrote:
> Hi,
>
> I've got a strange networking problem, with connecting a private network (across GRE tunnels) with a physical network (vlan).
> * I can ping from my virtual to nodes to the "real network" and vice versa.
> * "Real" traffic (e.g. TCP packets) from the "physical network" to the virtual disappears into nothingness. (Traffic from the virtual arrives at the physical network)
>
> It looks like the openvswitch discards the traffic from the physical network before tcpdump is allowed to capture any traffic.
> (a tcpdump on the eth interface does not show any return traffic)

tcpdump runs before Open vSwitch so it's not being discarded by OVS.
You mentioned that that this is a vlan, are tagged packets being
delivered directly to the host?  Some versions of the Linux kernel
have problems with vlans when used with OVS.