Cisco Systems CSR 1000V manual Modprobe vhost-net, For more information, see the KVM documentation

Chapter 6 Installing the Cisco CSR 1000V in KVM Environments

Increasing Performance on KVM Configurations

Note When configuring CPU pinning, carefully consider the CPU topology of the host server. If using a Cisco CSR 1000V configured with multiple cores, do not configure CPU pinning across multiple sockets.

•Enabling the vhost-net Driver

To improve performance in KVM environments, Cisco recommends that you enable the LINUX vhost-net driver. Make sure the vhost-net driver is loaded by entering the following command on the KVM host:

modprobe vhost-net

For more information, see the KVM documentation.

Note The vhost-net setting is enabled by default on KVM Ubuntu installations. If using Red Hat Enterprise Linux, you must specify which devices will use the XML definition file.

Cisco CSR 1000V Series Cloud Services Router Software Configuration Guide

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