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From Ben Laurie <...@gonzo.ben.algroup.co.uk>
Subject Re: Obscure MTU problem
Date Tue, 26 Mar 1996 09:34:23 GMT
> 
> > Hi,
> > 
> > I've just been investigating a problem with our new Apache based
> > webserver where people using dialups with _some_ ISPs were having extreme
> > difficulty with our site (intermittently). The symptom at their end was that
> > they got connected but then hang indefinitely waiting for the data. At our end
> > we see connections for the data sitting at FIN_WAIT_1 with lots of stuff in
> > the send queue.
> > 
> > I seem to have solved this problem by setting the MTU to 512 (default 1500).
> > SCO 5 is uses Path MTU Discovery (a lot of implementations use MTU=512 for all
> > nonlocal nets) which is probably the cause of the problem. We don't have any
> > such problem with a SCO 3 box and an SGI on the same net.
> > 
> > Any thoughts, anyone?
> 
> Are these clients MacTCP clients by chance? I understand that Path Discovery
> on this TCP stack sucks.

Nope. Win95 clients.

Cheers,

Ben.

> 
> 
> 
> 
> 
> 

-- 
Ben Laurie                  Phone: +44 (181) 994 6435
Freelance Consultant and    Fax:   +44 (181) 994 6472
Technical Director          Email: ben@algroup.co.uk
A.L. Digital Ltd,           URL: http://www.algroup.co.uk
London, England.

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