From: "Robert Comer" 

> But how did you disable it? I think the only way is the netsh command with
> 'rss=disabled' (apart from a funky way in a URL I posted in a nearby
> message about using some diagnostics from within IE).

The autotuning level netsh command is what disables window scaling.  I
hadn't heard of the rss command either and I had quite a lot of dialog with
the networking people on the scaling issue...

Googling rss, it's receive side scaling, interesting and it could have
something to do with geo's problem, but it's not the problem with scaling
and routers.

--
Bob Comer


"John Beckett"  wrote in message
news:f1uup29jsplcs9ld127ju0u2v940mick56{at}4ax.com...
> "Geo."  wrote in message
news::
>> > In the same way, it appears that Vista has TCP window scaling enabled
>> > by
>> > default
>>
>> Disabling that was one of the first things I tried (timestamps too)
>
> But how did you disable it? I think the only way is the netsh command with
> 'rss=disabled' (apart from a funky way in a URL I posted in a nearby
> message about using some diagnostics from within IE).
>
> At any rate, when you have some time, you should capture some traffic
> while the network is idle; then have your problem Vista box copy a file.
> You only need maybe a minute of traffic (or maybe longer if it takes
> longer for the problem to manifest itself).
>
>> No router in the picture, just a terraserver, a gigE switch, and vista
>> with
>> the firewall disabled.
>
> Oh. What is a terraserver? (I've seen the Microsoft web site).
> And the traffic is not passing through a firewall?
>
>> > netsh interface tcp set global rss=disabled
>> > netsh interface tcp set global autotuninglevel=disabled
>>
>> I tried the autuninglevel thing but what's the rss one do?
>
> rss is 'receive-side scaling'. Bear in mind that I haven't used Vista and
> haven't studied its technical documentation, but I believe that
> rss=disabled tells Vista to not advertise a receive window scale option
> (i.e. the scale would be 1, as it was in the original TCP spec).
>
>> (guess which finger)
>
> 
>
> John
>

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