RHEL4 virtio network interface driver fails to handle jumbo frame packets

Solution Verified - Updated -

Issue

  • RHEL4 network interface with virtio-net driver fails to handle jumbo frame packets
  • When you set up large MTU (eg: 9000) and ping -s 1500 TARGET from guest, you will get 100% packet loss

Environment

  • Red Hat Enterprise Linux 4 (as KVM guest)
  • virtio-net network interface
  • MTU larger than standard Ethernet MTU

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