can I ask mtu question

Ricky Beam jfbeam at
Fri Jan 30 23:43:37 UTC 2009

On Fri, 30 Jan 2009 17:00:00 -0500, Saku Ytti <saku+nanog at> wrote:
> Which standard are you referring to? AFAIK, nothing above 1500 is
> standardised

None that have ever been accepted.  From a quick google for manufacturer  
support, 9216 looks like the most popular number.  But, as I said, it  
boils down to the largest frame *every* device on the LAN will accept.  If  
there is a single device that only supports "9000", then that's your  
limit.  And if there's a single non-JF device in the LAN, it throws a  
wrench into the whole thing. (This appears to be one of the sticking  
points as to why IEEE won't accept the addition of JF to any specs.)


PS: The topic pops up again with super-jumbo frames in 10G networks.

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