Depending on the drivers on the system, you can specify that a wired connection disables the wifi. I've seen this mostly on Intel drivers, but some Dell cards support this as well I believe. Since I almost never install the full [crappy] software package that comes with wifi drivers, you can look for this setting in Device Manager, under the Properties for the wifi interface.
International Studies and Programs
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From: Doug Nelson [mailto:[log in to unmask]]
Sent: Friday, March 19, 2010 12:07 PM
To: [log in to unmask]
Subject: Re: [MSUNAG] Think I found the problem (was, RE: [MSUNAG] Network or DNS issues This Morning?)
On Fri, Mar 19, 2010 at 10:05:56AM -0400, Al Puzzuoli wrote:
> After some poking around, I believe I've found the cause of my slow
> performance issue this morning. I have a Windows 7 laptop, which is
> sitting on a dock and plugged into a working ethernet port. However,
> my wireless switch was on, and the machine had a very weak connection
> to a wireless network. I've seen this before and just never put two
> and two together. Once I turned off the wireless switch and rebooted
> the machine, everything began working fine. Does anyone know how I
> can verify the metrics on my network connections and insure that
> ethernet is getting priority?
Yeah, good luck with that. You can see the route metrics by running "route print" (at least under XP), and you can add/delete routes using the "route" command, but I don't know where to set default metrics for new connections. Generally, the wired interface will have a better metric, but I have seen occasions where my browser traffic will prefer the wireless interface, while other non-browser connections remain on the wired link. I generally just kill the wireless when I'm docked.
Doug Nelson, Network Architect | [log in to unmask]
Academic Technology Services | Ph: (517) 353-2980
Michigan State University | http://www.msu.edu/~nelson/