[dpdk-dev] [PATCH v8 10/10] app/testpmd:test VxLAN Tx checksum offload

Yong Wang yongwang at vmware.com
Fri Nov 7 01:43:44 CET 2014


>> As to HW TX checksum offload, do you have special requirement for implementing TSO?

> Yes. TSO implies TX TCP and IP checksum offload.

Is this a general requirement or something specific to ixgbe/i40e? FWIW, vmxnet3 device does not support tx IP checksum offload but doe support TSO.  In that case, we cannot leave IP checksum field as 0 (the correct checksum needs to be filled in the header) before passing it the the NIC when TSO is enabled.

Yong


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