1 PC 2 Network

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I have a computer running on Windows XP Professional SP2. And this computer
has 2 network adapter. 1 normal PCI network adapter, 1 wireless PCI network
adapter. The wireless network adapter is used to connect to a wireless
network, while the other one is connected to a wireless router (running on a
different network).

I can connect to the wireless network successfully with my wireless network
adapter when I don't connect to the wireless router. But, if I connect,
everything fails. The wireless network that I used to connect lost contact
with all PCs in the network.

It seems like I can only connect to 1 network at a time. How can I resolve
this problem? Thank you.
 
I'm guessing that you have an IP-address clash.

When you connect to the wireless network, you are probably being assigned an
automatic IP address by DHCP. If this is in the same subnet as the wired
connection's IP address, this will cause confusion over routing.

IME Windows gets confused if one computer has two IP addresses in the same
range, even if both are correctly-configured. Linux does not suffer this
problem.

Some routers allow you to have differing subnets for wireles and wired. Not
all do, though. If that is possible it may be your solution.
 
I'm guessing that you have an IP-address clash.

When you connect to the wireless network, you are probably being assigned an
automatic IP address by DHCP. If this is in the same subnet as the wired
connection's IP address, this will cause confusion over routing.

IME Windows gets confused if one computer has two IP addresses in the same
range, even if both are correctly-configured. Linux does not suffer this
problem.
Click to expand...

Hmm. Got any articles talking about this? My laptop has 2 network connections
on the same subnet, and I can move back and forth between Ethernet and WiFi with
few problems. Doing a Firefox download, for instance, I may not even have to
restart the download, when I switch between one and the other.

Now if you have a portable computer running as a browser, and you switch between
Ethernet and WiFi, a master browser election might cause problems. Depending
upon how you change connectivity, you could lose network connectivity for 30
seconds to a minute; during that time, either the portable computer or another
computer could force a master browser election. This will cause a segmented
workgroup, which can indeed cause the OPs reported problem.
<http://nitecruzr.blogspot.com/2005/04/nt-browser-or-why-cant-i-always-see.html>
http://nitecruzr.blogspot.com/2005/04/nt-browser-or-why-cant-i-always-see.html
 
I have a computer running on Windows XP Professional SP2. And this computer
has 2 network adapter. 1 normal PCI network adapter, 1 wireless PCI network
adapter. The wireless network adapter is used to connect to a wireless
network, while the other one is connected to a wireless router (running on a
different network).

I can connect to the wireless network successfully with my wireless network
adapter when I don't connect to the wireless router. But, if I connect,
everything fails. The wireless network that I used to connect lost contact
with all PCs in the network.

It seems like I can only connect to 1 network at a time. How can I resolve
this problem? Thank you.
Click to expand...

I'm not sure that I am reading your statement properly. Please restate this:
I can connect to the wireless network successfully with my wireless network
adapter when I don't connect to the wireless router. But, if I connect,
everything fails.
Click to expand...
Is there an Ethernet (wired) connection implied? If so, would you please
restate it explicitly.

What about the two different networks? Are they the same, or different,
workgroups? Are they otherwise connected to each other, without this extra
computer?

Let's look at "browstat status" and "ipconfig /all" from this computer,
connected to both networks, and then not connected to both networks, so we can
diagnose the problem. Read this article, and linked articles, and follow
instructions precisely (download browstat!):
<http://nitecruzr.blogspot.com/2005/05/troubleshooting-network-neighborhood.html#AskingForHelp>
http://nitecruzr.blogspot.com/2005/05/troubleshooting-network-neighborhood.html#AskingForHelp
 
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