Ethereal-users: Re: [Ethereal-users] Lots of Incorrect Checksum

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From: Jaap Keuter <jaap.keuter@xxxxxxxxx>
Date: Thu, 27 Jul 2006 18:14:48 +0200 (CEST)
Hi,

Could be a number of things.
* Cabling, are the cables up to par?
* Connectors, are they oke?
* Speed setting, multiplex settings oke? Autonegotiate may fail.
* A hub somewhere?
* Checksum offloading to the network card?

Thanx,
Jaap

On Mon, 12 Jun 2006, Todd Franklin wrote:

> Hi everyone.
>
> Windows 2003 Standard Server.  XP SP2 clients.  Keep getting disconnected
> without warning.  I synchronize my "MY Documents" to the server,
> occasionally a balloon in the lower right pops up says "You are no longer
> connected to server.  You can continue working offline".  But for those who
> run an app that is hosted on the server, it is misery...
>
> So I fired up Ethereal.  LOTS of packets, I mean close to 80 or 90 percent,
> have incorrect checksums.
> Others say "Congestion Window Reduced".
>
> The server has 1GB card plugged into a Cisco 3560 switch.  I am thinking
> someone is not doing something right (flow control or something).  Any
> ideas??
>
> Todd
>

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