Best practices for using multicast with kvm virtual machines

Solution Verified - Updated -

Issue

  • How do I enable multicast networking for applications in environments with KVM virtual machines present on the same network or directly on KVM virtual machines?
  • Poor KVM performance when using multicast

Environment

  • Applications that use mulitcast  
    • Red Hat Enterprise Linux 5 Advanced Platform (Clustering and GFS/GFS2)
    • Red Hat Enterprise Linux 6 with the High Availability and Resilient Storage Add Ons
    • MRG Messaging (MRG-M) used with the Clustering option
  • Hypervisors that will have performance impact on multicast traffic  
    • Red Hat Enterprise Linux 5 KVM
    • Red Hat Enterprise Linux 6 KVM
    • Red Hat Enterprise Virtualization 2.2

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