Rafel - I don't understand what you are trying to say mate?
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Still stuck on this gents..
So far as I can tell Jumbo frames are enabled and tested working end to end using the command line on the esxi host.
But when I do a packet capture I cannot see ANY packets over about 1500 in size.
It's as if the ESXI host just doesn't want to use jumbo frames even though the interfaces allow it.
Well some how I made the jumbo frames work on my ESXI host.
I enabled Jumbo frames for every single interface on the ESXI host and on my NAS which is providing the iSCSI (qnap 869 pro) I enabled jumbo frames on both interfaces on that.
Now it's working no problem!