Shorewall users - Nov 2004 - OT: 1gigabt nics

Begging indulgence of the list - asking here because due 
to the higher likelyhood of getting an answer...

I have an application that often loses connection from one machine to 
another when one (or more) of the machines has particular brands of  
1gig nics,  but which runs rock solid when on 10meg nics and some 1 
gig nics.  

The application senses (falsely)  that the connection has been shut 
down by the opposite end.  It uses only TCP/IP, single socket at 
either end for alternate transmit/receive.  Loss of connection 
happens when the socket is handed off to a spawned task (windows 
naturally).  Never fails with 10meg nics.  Never.   

Has anyone heard of such a thing, and what to do about 
it?


-- 
______________________________________
John Andersen
NORCOM / Juneau, Alaska
http://www.screenio.com/
(907) 790-3386

.

I have had trouble in the same situation with windows servers and 
workstations just go into my network places and throttle back to 10mb or 
100mb and everything works. I did not reasearch why. On mine most were on 
autosense and experianced lost connections, or would not connect at all 
until manually set.



Mike
----- Original Message ----- 
From: "John S. Andersen" <jsa@norcomix.dyndns.org>
To: <Shorewall-users@lists.shorewall.net>
Sent: Tuesday, November 23, 2004 1:55 PM
Subject: [Shorewall-users] OT: 1gigabt nics

> Begging indulgence of the list - asking here because due
> to the higher likelyhood of getting an answer...
>
> I have an application that often loses connection from one machine to
> another when one (or more) of the machines has particular brands of
> 1gig nics,  but which runs rock solid when on 10meg nics and some 1
> gig nics.
>
> The application senses (falsely)  that the connection has been shut
> down by the opposite end.  It uses only TCP/IP, single socket at
> either end for alternate transmit/receive.  Loss of connection
> happens when the socket is handed off to a spawned task (windows
> naturally).  Never fails with 10meg nics.  Never.
>
> Has anyone heard of such a thing, and what to do about
> it?
>
>
> -- 
> ______________________________________
> John Andersen
> NORCOM / Juneau, Alaska
> http://www.screenio.com/
> (907) 790-3386
>
> .
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>
>

Mike Lander wrote:
> I have had trouble in the same situation with windows servers and 
> workstations just go into my network places and throttle back to 10mb 
> or 100mb and everything works. I did not reasearch why. On mine most 
> were on autosense and experianced lost connections, or would not 
> connect at all until manually set.
FWIW, this sounds to me like autosense problems years ago when people 
and manufacturers switched to 100mbit hardware, where then I was working 
with a lot of this new stuff and indeed as Mike suggests, the autosense 
function on certain hardware makes/models would not play well with 
others. Also, the solution that I used was to manually set the speed, 
not the best solution, but a useable one.

Alex Martin
http://www.rettc.com