Hi Ilya, Thanks for your reply.
The thing is, if checksum offloading is enabled in both VMs, then sender VM will send a packet with invalid TCP checksum, and later OVS will send this packet to receiver VM directly without calculating a valid checksum. As a result, receiver VM will drop this packet because it contains invalid checksum. This is what happened when I tried this patch. Best, Yifeng On Mon, Jan 27, 2020 at 12:09 PM Ilya Maximets <i.maxim...@ovn.org> wrote: > > On 27.01.2020 18:24, Yifeng Sun wrote: > > Hi Flavio, > > > > I am testing your patch using iperf between 2 VMs on the same host. > > But it seems that TCP connection can't be created between these 2 VMs. > > When inspecting further, I found that TCP packets have invalid checksums. > > This might be the reason. > > > > I am wondering if I missed something in the setup? Thanks a lot. > > I didn't test myself, but according to current design, checksum offloading > (rx and tx) shuld be enabled in both VMs. Otherwise all the packets will > be dropped by the guest kernel. > > Best regards, Ilya Maximets. _______________________________________________ dev mailing list d...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-dev
