Virtual Machines stop communicating over the Linux bridge when using Emulex Network cards

Solution Verified - Updated -

Issue

On a physical host that runs a number of virtual machines connected externally via a bridge we observe that traffic between a VM and the external network suddenly stops working. The host NICs used in the bridge are produced by Emulex.

Environment

  • Red Hat Enterprise Linux
  • Virtual Machines running on the host via KVM and connected via the Linux software bridge
  • Emulex NICs

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