Network stops functioning on RHEL6 guest under Hyper-V when the irqbalance service is started

Solution Verified - Updated -

Issue

On RHEL6 Hyper-V virtualisation guests configured with more than 1 virtual CPU and with the irqbalance service running, the networking stops functioning ~5-10 seconds after the network service is started.

Environment

  • Red Hat Enterprise Linux (RHEL) 6 virtualisation guest
    • Configured with more than 1 virtual CPU
    • irqbalance service running
  • Windows Server 2008 R2 Hyper-V virtualisation host

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