|Typically we leave the MTU size set to 1500. I wouldn't mess with the MTU settings.|
Why are you trying to send bigger packets? Even if you managed to, the second it hit any other ethernet network (like the internet), the oversized packet would be dropped because it's the wrong size.
There's a ton of info on packets size and such available on the web. You might want to hit google and start doing some reading.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.