[ovs-dev] Gso testing with respect to stt tunnel

Jesse Gross jesse at nicira.com
Mon Sep 24 17:42:09 UTC 2012


On Mon, Sep 24, 2012 at 4:18 AM, satish R <satish6541 at gmail.com> wrote:
> Hi,
>
> Topology.
>
> vm eth5 ----- tap0 ---- br0-----eth0
> --------------------------------------------------eth0
> -----br0-------tap0------eth5 vm
>                    machine1
> machine2
>
> eth5, tap0, br0 mtu has been set as 64000 to enable sending of greater sized
> packets.
> eth0  has an mtu of 1500.
>
> I had enabled gso on eth0 and pinging eth5 from vm of machine 1 using -s
> option for ping.
>
> I have tried -M (do,dont and want) options of ping as well but nothing seems
> to work.
>
> If anyone could please help it would be great as in how to test gso between
> two vms using tunnels.

GSO doesn't support ICMP.

Many of your questions in this area arean't specific to Open vSwitch.
Please experiment in a simpler environment first when trying to
understand Linux behavior.



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