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strange network file copy error

Im trying to move some files off of my laptop(xp home) onto a 2003 server (running AD) over a 100mbut ethernet line, both machines on the same switch. The files are approx 15 megs a piece and total files is around 40gigs. The network transfer will begin, and around 1-2 minutes into the copy, ill get a "Cannot copy FILENAME: The specified network name is no longer available." error on the laptop. The account im accessing the server with has full permissions for the folder im copying to. I tried running a continous ping, while copying the files over, and i got the error again (no hiccup from the continous pinging). I also checked the md5 hashes on the files that were copied over to the server, and they all checked out, so the data is getting across ok.
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xDavidHx
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xDavidHx
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3 Solutions
 
alimuCommented:
have you tried forcing your network cards and switch to run at 100Mbps? sometimes this is caused by a problem with autonegotiating link speed.
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Michael PfisterCommented:
In most cases the problem is that the duplex setting is not negotiated corretly. One is 100/full, the other is 100/half. Try setting BOTH ends and the switch to use a fixed value of 100/full. You could try a cross-cable to eliminate the switch ...

Also temporarily disable the virus scanner on your laptop.

Hope it helps,

Michael
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beaconlightboyCommented:
I would definetly rule out physical layer problems first.  it would help if you could tell us when this began?  did anything recently change?  how long have you had the problem?

Another thought is...

Do you have Server 2003 SP1 installed?  SP1 has issues with network connectivity and XP pc's.  we had a similiar problem and a hotfix did it for us.  check out article 898060.  
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xDavidHxAuthor Commented:
I dont think the server is running sp1, Nothing appears under my computer properties under the general tab about sp1. This is the first time that ive tried transfering files to the server with this laptop, and i havent had any problems transfering with other computers (the cable im using is good). Im using a non-manageable switch, but ill try forcing 100mb fdx and a cross over cable as soon as i get the laptop back (i dont have it the next couple of days).

What are the technical reasons benind ethernet having problems autonegotiating sometimes?
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alimuCommented:
as far as I know it's usually implementation of autonegotiation specification that is "faulty" in some way... i.e. bad code somewhere or vendors implementing their own version of a specification resulting in problems when you mix device manufacturers...
Sometimes it's fixed up in subsequent software and firmware updates for network adapters and switches but not always, it's generally easier to force a speed and duplexing option, then all you have to worry about is faulty cable.
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beaconlightboyCommented:
as a rule we use the same brand nics in all our pc's.   we also use only the same brand switches.  took us a while to get to that point though.
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alimuCommented:
same brand NICs and Switches?  the communications path takes in both ends and whatever's in the middle...
You haven't told us whether forcing speed and duplex has fixed your problem ??
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xDavidHxAuthor Commented:
>as soon as i get the laptop back (i dont have it the next couple of days)
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beaconlightboyCommented:
unfortunately whats in the middle is really irrelavent in a duplex issue, as normally its between the nic and switch.  not switch to switch, or switch to router.  if it was, it would be easier to solve due to the advent of managable switches and advanced reporting wtihin them.  my comment was merely a steering mechanism, not a solution.
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alimuCommented:
:o) I meant middle as in a nic to nic connection that passes through a switch,
nic1-switch(middle)-nic2. even with the same vendor, different device types will be running different firmware anyway so it's not really all that relevant, xDavidHx was asking why the auto-negotiation faults occurred and I was trying to explain in a simplistic a fashion as possible the reason for that..
If you hit a problem you think is related to the devices, first try forcing duplex & connection speed, then replace possibly faulty network cables (especially the lovely spongey white ones you get with laptops, have had no end of problems with them), if no change you can always update drivers on the network cards and then start looking at firmware updates on the switches as a last resort (unless there's obvious packet loss happening at the switch).
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alimuCommented:
xDavidHx,
could you please provide an update?
thanks!
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alimuCommented:
recommend split between all participants <mpfister> <beaconlightboy> and <alimu>
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