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The importance of IeeePriorityTag with converged RDMA Switch Embedded Teaming
Posted by Didier Van Hoye on September 27, 2017
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Introduction

If you read my blog on Switch Embedded Teaming with RDMA (for SMB Direct) you’ll notice that I set the -IeeePriorityTag to “On” on the vNICs that use DCB for QoS. This requires some explanation.

When you configure a Switch Embedded Teaming (SET) vSwitch and define one or more management OS vNICs on which you enable RDMA you will see that the SMB Direct traffic gets it priority tag set correctly. This always happens no matter what you set the -IeeePriorityTag option to. On or Off, it doesn’t make a difference. It works out of the box.

mapped RDMA vNIC to their respective RDMA pNIC

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