Testing Jumbo Frame Support on ESXi

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esxi vmware jumboFrames mtu

You will need to SSH into the host to perform these commands.

This is the basic syntax

vmkping -4 -d -I <vmk-number> -s <packet-size> <address>
  • This is an example using vmk3 and vmk4, which we will assume is used for storage.
  • We will use a packet size of 8400 bytes (can’t use 9000 b/c there won’t be enough room to allow for IP overhead)
  • We will assume is the address of the storage interface
vmkping -4 -d -I vmk3 -s 8400

vmkping -4 -d -I vmk4 -s 8400
  • Make sure you test all interfaces from the host, against all hosted ip addresses on the storage