High network latency is observed on NSX logical networks when using the qfle3 driver versions prior to 1.0.79.0
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Article ID: 316314
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Updated On:
Products
VMware vSphere ESXiVMware NSX
Issue/Introduction
This article describes a known issue with the qfle3 driver versions prior to 1.0.79.0 that can lead to high CPU usage on ESXi hosts and network latency over VXLAN backed NSX logical networks.
Symptoms:
The ESXi host network adapter is using a version of the qfle3 driver prior to 1.0.79.0
Network latency is observed between VMs communicating over VXLAN networks or VMs communicating with the external network through an NSX Edge gateway
Network latency may be observed when running ping to test network connectivity
Network latency may increase unexpectedly with increased load
You may see high CPU usage for the NetWorld thread for a particular VM in net-stats or esxtop: