Date   : Sat, 20 Nov 2010 12:01:07 +0000
From   : darren.grant@... (Darren Grant)
Subject: Rockin' out with awServer :-)

On 20 Nov 2010, at 00:35, Mark Usher wrote:

> If we are talking about inter connectivity to Ethernet, we need to be
> keeping the packet size below the Ethernet MTU to keep things simple and not
> having to implement stupid size buffers.
> 
> //M
> 

If we are talking about sending Econet over the internet then you not only 
need to keep it under the 1500 MTU for ethernet but also ideally take into 
account that many UK users will be using either ADSL that have a lower MTU 
of 1458 due to the overhead of encapsulating ethernet over ATM. Then you 
add any overhead that is required to encapsulate the econet packets into 
IP. So the econet packet size would need to be less than 1458 - Econet Encapsulation 
overhead for optimum use of an ADSL connection. An added complication is 
that some providers actually have their network running inside another network 
further reducing the MTU size 1416. I would suggest the easiest thing is
to assume an transport layer Max MTU of 1400 just to be on the safe side
otherwise you might end up with some horribly fragmented packets.