mtu question. more should be better, right?

[Deric Kwok <deric.kwok2000 () gmail com>]

Hi all

When I setup the server mtu as 9100. why I have to configure the
switch mtu 9300 to make it working?

What this extra 200 bytes is for what purpose? ls it standard?

What is disadvantage of setting our all internal networks (host /
equipment) mtu more than 1500?

Thank you for your advice.