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From: Iain Barker <iain.barker@oracle.com>
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Subject: Re: [dpdk-users] Outer VLAN stripping X710 NIC
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I posted my observations on the same issue a year or so ago...
See my follow-ups on this thread for a patch to work around the problem:

http://mails.dpdk.org/archives/users/2017-October/002530.html

Note that the patch has real-time overhead so was rejected.
But we are using it to good effect in our production systems.