Troubleshooting Jumbo Frames in VMware

ow to troubleshoot Jumbo Frames with Vmkping on ESXi hosts or Ping on Windows servers.

“Jumbo frames” is the ability of using larger Ethernet frames than the default of 1518 bytes. As explained herethis could increase the total throughput of the network and also decrease load on both hosts and storage. In this blog post we will see how to verify that Jumbo Frames has been correctly configured and actually is working.

When configuring Jumbo Frames we typically define the new MTU (Maximum Transmission Unit) which really is the payload inside an Ethernet Frame. For ordinary Ethernet the maximum frame size is 1518 byte, where 18 of these are used by Ethernet for header and checksum, which leaves 1500 byte to be carried inside the frame.

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