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Configuring Fast CNP
In the distributed storage scenario, congestion is more likely to occur if network convergence occurs and there is concurrent or burst traffic. To prevent such congestion, you are advised to enable the fast CNP function.
# Enable fast CNP. After the configuration is successful, a forwarding device records packet information in a flow table entry when forwarding a packet. When receiving packets with the ECN flag, the forwarding device sends CNP packets to the source server based on the learned flow entries. This shortens the CNP feedback path and the time for the source end to decrease the sending rate, thereby alleviating congestion on the forwarding device.
<HUAWEI> system-view [~HUAWEI] low-latency fabric [~HUAWEI-low-latency-fabric] qos fast-cnp enable
Precautions:
- Fast CNP is not supported in dual-homing access scenarios.
- Fast CNP is not supported in VXLAN scenarios.