Re: Packet loss?
From: -DC- (DC_at_discussions.microsoft.com)
Date: 01/21/05
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Date: Fri, 21 Jan 2005 15:31:02 -0800
Hi Ed,
The switch is a Linksys BEFSR41 running at 100Mbps Full Duplex. I've
already tried all the different settings on the network card (10Mbps and
100Mbps both full and half duplex) with no improvement. I believe I was
having this same problem a few months ago with a different switch as well.
Right now I have the card forced to 100Mbps FD. Same goes for a second
computer on the same switch which is not having any problems.
"Ed Horley" wrote:
> Need to know what sort of hub/switch you are plugged into, what the host
> thinks the speed/duplex is and what the hub/switch thinks the speed/duplex
> is. Often different OS's negotiate differently speed and duplex with the
> same NIC so you have to be careful about that. If it is a managed switch
> (cisco/foundry/procurve/extreme/etc) try setting the speed and duplex and
> doing the same on the host in the OS. If that fixes the problem then it
> mostly likely is a auto negotiate issue.
> Post back what you have and we can go from there.
> Regards,
> Ed Horley
> Microsoft MVP Server-Networking
>
> "-DC-" <DC@discussions.microsoft.com> wrote in message
> news:7B749090-C6D8-4715-AD31-02FE64FC5AB8@microsoft.com...
> > I've got a strange problem with a Dell GX1. For a long time I've noticed
> > that transfering files between this and another machine took longer than
> > normal. Eventually I used Ethereal to do a sniff and found that there are
> > many "TCP Dup Ack" errors on this PC. So I tried installing a different
> > network card; no change. I booted using a DOS network boot disk and
> > copied a
> > file to the other computer while doing a sniff. The other computer
> > indicated
> > several retransmits. I hooked up a laptop to this same cable and got no
> > errors.
> >
> > So I've eliminated the network hardware, the NIC, and the OS. What the
> > heck
> > is the problem? Is the computer simply not keeping up with the network
> > card?
> > Seems hard to imagine considering the card is built into the motherboard!
> >
>
>
>
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