Cavium FastLinQ 45000 Series, User Manual

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7–RoCE Configuration
Configuring DCQCN
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5. Set up the VM for PVRDMA as follows:
a. Install one of the following supported guest OSs:
 RHEL 7.5 and 7.6
 Ubuntu 14.04 (kernel version 4.0)
b. Install OFED-3.18.
c. Compile and install the PVRDMA guest driver and library.
d. Add a new PVRDMA network adapter to the VM as follows:
 Edit the VM settings.
 Add a new network adapter.
 Select the newly added DVS port group as Network .
 Select PVRDMA as the adapter type.
e. After the VM is booted, ensure that the PVRDMA guest driver is
loaded.
Configuring DCQCN
Data Center Quantized Congestion Notification (DCQCN) is a feature that
determines how an RoCE receiver notifies a transmitter that a switch between
them has provided an explicit congestion notification (notification point), and how
a transmitter reacts to such notification (reaction point).
This section provides the following information about DCQCN configuration:
 DCQCN Terminology
 DCQCN Overview
 DCB-related Parameters
 Global Settings on RDMA Traffic
 Configuring DSCP-PFC
 Enabling DCQCN
 Configuring CNP
 DCQCN Algorithm Parameters
 MAC Statistics
 Script Example
 Limitations