Vista to XP large file transfers over wireless fail consistently

I am experiencing a wireless network (802.11g) compatibility issue between
Windows Vista Ultimate and Windows XP Pro. When I attempt to copy large
files (e.g. 200 MB or larger) from my Vista-based laptop to a share on one
of my XP Pro systems, the transfer starts normally and proceeds at a
reasonably good clip. It then stalls and dies, somewhere between half-way
and two-thirds of the way through the transfer. Diagnostic information is
useless (essentially, "an error happened - Try again or Cancel") and no
Windows events are recorded on either end.

What's strange is that I can login to the Windows XP system (Remote Desktop
from the Vista laptop) and then "pull" the file from the Vista laptop with
no problem. If, at the Vista laptop, I copy the same file from the Windows
XP machine, the transfer also succeeds. In all of my testing, I have only
attempted the copy with Windows Explorer, copy/paste. I'm not really
interested in side-stepping the issue by trying XCOPY, ROBOCOPY, FTP or some
other file copy approach.

Prior to making this post, I have searched far and wide for shared
experiences related to this problem and have found some (e.g.
http://www.vistax64.com/vista-networking-sharing/127485-network-transfer-error-cant-send-large-files.html),
but no solid conclusions or solutions. I have performed the "disable
auto-tuning" trick on Vista, using netsh. I've removed the QOS and IPV6
drivers from the network stack. I ran Microsoft's Internet Connectivity
Evaluation Tool
(http://www.microsoft.com/windows/using/tools/igd/default.mspx) to check my
router for compatibility with Vista and it passed with flying colors (even
though I don't believe it's relevant to this problem). I've tried different
network paths to rule out disk errors or I/O performance issues. I routinely
move gigabytes between my various other wired (gigabit LAN) systems,
including another Vista Ultimate machine, without problems.

I have no network connectivity or permissions issues, nor do I have any
network performance issues - other than this one. Everybody plays nicely
with everbody (and it's a good-sized party, for a home network :-). I work
at home. When I get tired of sitting in the upstairs office, I come
downstairs and use my laptop, usually remote desktop'ed to several systems
(via my wireless network) without any issues at all. To me, this is clearly
a Vista issue with outbound wireless transport. Perhaps the heterogenous
nature of the network (Vista and XP mixed) is a factor. What's not so
apparent is the solution - and don't suggest that I "upgrade" all of my XP
machines to Vista. :-)

If you're still interested, here are the relevant parts of my configuration.
The listed order describes the network path between the two machines.

Dell E1705 laptop (Core 2 Duo) with Vista Ultimate, SP1 and 1390 WLAN
mini-card.
D-Link DWL-G700 wireless access point - about 8 feet away from my laptop.
D-Link DGS-1005D 5-port gigabit switch
.... Cat5 wiring ... :-)
D-Link DGL-4100 gigabit gaming router (I'm not a gamer, but a good router)
Netgear gigabit switch
Dell 8400, Windows XP Pro, SP3, Broadcom NetXtreme 57xx Gigabit C

Here's some more info. Note that everything is on the same subnet
(192.168.2.):

** IPConfig of the laptop **

C:\Users\mrinfret>ipconfig

Windows IP Configuration


Wireless LAN adapter Wireless Network Connection:

Connection-specific DNS Suffix . : ri.cox.net
IPv4 Address. . . . . . . . . . . : 192.168.2.126
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.2.101

Ethernet adapter LAN:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : ri.cox.net

Tunnel adapter Local Area Connection* 6:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :

Tunnel adapter Local Area Connection* 11:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : ri.cox.net

** traceroute between systems ***

C:\Users\mrinfret>tracert -d 192.168.2.74

Tracing route to 192.168.2.74 over a maximum of 30 hops

1 1 ms <1 ms 1 ms 192.168.2.74

Trace complete.

Got any ideas?

Thanks,
Mark


.

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