Re: Jumbo frame Question

[Wil Schultz <wschultz () bsdboy com>]

This helps tons. 

speedguide.net has some registry 'tweeks' for different versions of windows. 

Also Win7 had the ability to turn on a FASTTCP type of congestion management called Compound TCP. I haven't tried the 
windows version so ymmv, but I have experienced great success by changing the congestion avoidance algorithm on other 
devices. 

-wil

On Nov 25, 2010, at 4:19 PM, Adrian Chadd <adrian () creative net au> wrote:

> TCP maximum window sizes.
>
> Application socket buffer sizes.
>
> Fix those and re-test!
>
>
>
> Adrian
>
> On Fri, Nov 26, 2010, Harris Hui wrote:
> > Hi
> >
> > Does anyone have experience on design / implementing the Jumbo frame
> > enabled network?
> >
> > I am working on a project to better utilize a fiber link across east coast
> > and west coast with the Juniper devices.
> >
> > Based on the default TCP windows in Linux / Windows and the latency between
> > east coast and west coast (~80ms) and the default MTU size 1500, the
> > maximum throughput of a single TCP session is around ~3Mbps but it is too
> > slow for us to backing-up the huge amount of data across 2 sites.
> >
> > The following is the topology that we are using right now.
> >
> > Host A NIC (MTU 9000) <--- GigLAN ---> (MTU 9216) Juniper EX4200 (MTU 9216)
> > <---GigLAN ---> (MTU 9018) J-6350 cluster A (MTU 9018) <--- fiber link
> > across site ---> (MTU 9018) J-6350 cluster B (MTU 9018) <--- GigLAN --->
> > (MTU 9216) Juniper EX4200 (MTU 9216) <---GigLAN ---> (MTU 9000) NIC - Host
> > B
> >
> > I was trying to test the connectivity from Host A to the J-6350 cluster A
> > by using ICMP-Ping with size 8000 and DF bit set but it was failed to ping.
> >
> > Does anyone have experience on it? please advise.
> >
> > Thanks :-)
> -- 
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