> -----Original Message-----
> From: Nivedita Singhvi [mailto:niv@xxxxxxxxxx]
> Sent: Thursday, September 16, 2004 9:19 AM
> To: Leonid Grossman
> Cc: 'Andi Kleen'; 'David S. Miller'; 'John Heffner';
> netdev@xxxxxxxxxxx
> Subject: Re: The ultimate TOE design
>
> Leonid Grossman wrote:
>
> > We can dream about benefits of huge MTUs, but the reality is that
> > moving beyond 9k MTU is years away. Reasons - mainly
> infrastructure,
> > plus MTU above ~10k may loose checksum protection (granted, this
> > depends whether the errors are simple or complex, and also this may
> > not be a showstopper for some people).
> > Even 9k MTU is very far from being universally accepted,
> eight years
> > after our Alteon spec went out :-).
>
> One other factor is TCP congestion control, and congestion
> windows we obey. Most of the time, you just can't send that much.
It's a bit painful to setup, but in general with 9k jumbos and TSO we were
able to get close to pci-x 133 limit - both in LAN and WAN tests.
Leonid
>
> thanks,
> Nivedita
>
>
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