Re: Large file downloads die out intermittently

On Mon, 13 Aug 2007 09:31:58 -0700, frantisek@xxxxxxxxxx wrote:

On 13 Srp, 16:47, "Chuck [MVP]" <n...@xxxxxxxxxxx> wrote:
On Sun, 12 Aug 2007 06:57:03 -0700, franti...@xxxxxxxxxx wrote:
Hello,

after some fruitless searching (and finding out about those with some
very similar problems, but no solutions), I decided to ask for help on
this again.
My problem is very similar to the ones posted here: Large file
downloads from the internet die out almost always, after random number
of downloaded bytes, though in about 1% of all attempts the transfer
actually finishes without stopping. The problem ONLY occurs when
downloading from the internet (NOT on local network). Problem occurs
also during streaming (youtube), large pics, sometimes a page doesn't
load (but refresh fixes it).
I have been able to pinpoint the problem (at least I think so) to
something inside Windows XP, the problem only occurs on one machine
(out of 5 on local network) - my new computer with fresh new Windows
XP SP2 from MSDNAA.
Some technical details:
Computer:
CPU:Intel dual core pentium E2160 (1.8GHz @ 3.15GHz - the overclock is
not the problem, does the same at stock speed)
MB: Asus P5N-E SLI (chipset nForce 650i SLI with integrated nVidia
network controller)
RAM: 2x1GB A-data vitesta 800MHz DDR2
GFX: GeForce 7300GT on PCI-E
various SATA storage devices
PSU: Chieftec 500W

Network:
cable (6Mbit), shared through a broadband router (Edimax AR 7400 ??
not sure, lost the packaging two years ago:-)), from there a UTP LAN
cable to each room, in each room is a 100Mbit capable switch (the
computer with this problem, along with three others, are behind a 4-
port Ovislink switch). About 5 computers at the same time are
connected, all Windows XP SP2, only the one spec'd above has the
problem.
I also tried another NIC (dug out some really old 10Mbit Edimax TP/BNC
NIC), with which the computer has the same problem.
Transfers on the local network (through the switch - windows sharing)
are OK - have transferred hundreds of GBs without problems.

The things I tried:
1. New drivers (chipset & integrated NIC, have most recent WHQL ones)
2. New cable (although the old one worked well)
3. new (10Mbit old plain PCI Edimax) NIC (although during testing i
actually did not disable the onboard NIC)
4. complete reinstall (from same CD)
5. fiddling with NIC configuration (autosensing etc...)

The things I haven't tried:
plugging directly into the router
meddling with advanced settings (MTU, RWin etc..)
another copy/version of Windows.

Does anyone have any clue? Thanx in advance,

dV

MTU is a pretty easy setting to check. It should be the same on each computer,
assuming that you do roughly the same surfing from each. If there's a unique
web site that you surf from one computer, and that one computer has a problem,
an alternate MTU setting on that computer wouldn't be an outrageously obscure
solution.
<http://nitecruzr.blogspot.com/2007/06/determining-mtu-to-single-serve...>http://nitecruzr.blogspot.com/2007/06/determining-mtu-to-single-serve...

You might try the DSLR Tweak Tests too.
<http://www.dslreports.com/tweaks>http://www.dslreports.com/tweaks

Thank you,
I tried to determine if there was any problem regarding my MTU
setting, and the answer seems to be a tentative no. I also checked the
other three WinXP computers, and they all seem to have identical
network settings....
Any other guesses?

The nVidia nForce is a known problem here (most frequently, with Windows
Networking though). Do any of the other computers have nVidia components?
<http://nitecruzr.blogspot.com/2006/02/hidden-personal-firewall-nvidia-nforce.html>
http://nitecruzr.blogspot.com/2006/02/hidden-personal-firewall-nvidia-nforce.html

Did you try DSLR Forums?
<http://www.dslreports.com/forum/sharing>
http://www.dslreports.com/forum/sharing

Can you download the same file, successfully, to the other computers?

How about a different router port (for the switch), then a different switch
port?

--
Cheers,
Chuck, MS-MVP 2005-2007 [Windows - Networking]
http://nitecruzr.blogspot.com/
Paranoia is not a problem, when it's a normal response from experience.
My email is AT DOT
actual address pchuck mvps org.
.

Relevant Pages

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