[Xen-users] Understanding netback/netfront GRO/GSO handling

[Kristoffer Egefelt <kristoffer@xxxxxxx>]

Hi,

Is netback/netfront able to send and recieve offloaded packets (64k) via the 
physical NICs ?
Specifically I’m experiencing problems when packets egresses a OVS GRE tunnel - 
then the packets are segmented to 1500 bytes.
Traffic between VMs on the same dom0 maintains the 64k packet size.

As I’m not sure if this is supposed to just work I’m having trouble identifying 
if the cause of this could be kernel, NIC drivers, netback, openvswitch or GRE 
...
I’m using Debian, kernel 3.13, OVS 2.1, Xen 4.4 and Intel ixgbe drivers.

Thanks.

Regards
Kristoffer


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