[Scottish] Network notwork

Colin McKinnon colin.mckinnon at ntlworld.com
Tue Jan 31 21:57:43 GMT 2006

On Tuesday 31 January 2006 09:17, Craig Perry wrote:
> Basically losing like 2% of packets, equated to a drop of 50%-60% in
> throughput which i thought was rather insane but hey...
> It was reasonably similar symptoms in that there were *shedloads* of
> duplicate ACKs, because the network was dropping a packet or two in one
> direction, and for some reason or other unbeknown to me, it is normal
> for a device to duplicate an ACK when it receieves packets out of
> sequence, or is genuinely just missing a packet... or something like
> that... it was a few months ago now...
> Bascially i saw improvements by messing around with the MTU, i think i
> decreased it significantly.
> I corrected it by replacing the router (actually it was one of those
> horrible "switch based routers" :-s)

Thanks Craig & Ray.

I don't suppose you remember what you did to the MTU?

At the moment this is getting Political at $ork. And since remote site is a 
customer, and its not my job to fix (or even know about such things) I'm 
having to tread lightly. If it were my installation I'd want to try swapping 
the hardware NAT for something else. I suspect that tinkering with the RWIN 
might help too. 

ho hum

If I get it fixed I'll let you all know.



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