[ovs-discuss] wrong TCP checksum on a vdev device

Avi Cohen (A) avi.cohen at huawei.com
Mon Jun 26 08:37:14 UTC 2017

Setup :
Namespace (no DPDK)  <--> veth1  --- veth0  type dpdk-af-packet <--> ovs-dpdk.

TCP packets generated at the namespace have wrong TCP checksum (probably not calculated ).  ICMP/UDP is OK.

If I disable the tx-hw-offload - TCP is running but performance is degraded (probably huge degradation) 
In native OVS (i.e. no DPDK)  - there is no problem.
Is this a bug ? 
Best Regards

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