On 10/22/2018 1:37 PM, Gregory Rose wrote:

I was thinking there would be another subsequent call to set the parameters but evidently there is not. Let me do some investigation and find out whether this is a bug or just something that was never implemented.  If it was just never implemented then the documentation needs to be fixed up.



Hi Yousong,

I've completed my investigation and find that we do not create APRHRD_IPGRE type devices with our GRE tunnels - we create a GRE tap device and that is an ARPHRD_ETHER type device.  The documentation is in error concerning support for legacy_l3 packet types in the GRE kernel datapath.

I'll update the documentation to state such.  The legacy_l3 packet type for GRE is supported in the user space datapath and I will note that as well in the updated documentation.

Thanks for pointing this out and helping us improve the accuracy of our documentation.

- Greg
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