Users Guide

7–RoCE Configuration
Configuring RoCE on the Adapter for Windows Server
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c. Verify that RDMA traffic is running.
Figure 7-11 provides an example.
Figure 7-11. RDMA Traffic
Limitations
VF RDMA has the following limitations:
 VF RDMA is supported only for 41xxx-based devices.
 At the time of publication, only RoCEv2 is supported for VF RDMA. The
same network direct technology must be configured in physical functions on
both the host and SR-IOV VFs in the VM.
 A maximum of 16 VFs per PF can support VF RDMA. For quad-port
adapters, the maximum is 8 VFs per PF.
 VF RDMA is supported only in Windows Server 2019 (for both the host and
VM OSs).
 VF RDMA is not supported for Linux VMs on Windows Hypervisor.
 VF RDMA is not supported in NPAR mode.
 A maximum of 128 queue pairs (QPs)/connections are supported per VF.
 RDMA traffic between PF and its VFs, and among VFs of same PF, is
supported. This traffic pattern is referred to as loopback traffic.