Motherboard is a Gigabyte P35-S3 1.0 with integrated Realtek 8186 chip.
Static IPs, no DHCP. PC is connected via WLAN stick to a wireless router, which is configured as standard gateway on all connected machines.
If I connect my Laptop or the NAS (both with static IPs) via patch cable to the LAN port of the PC, the wireless connection on the PC immediately dies, ie I can't ping the router anymore.
There seems to be a problem with two active network adapters on the PC, yet no problems on the Laptop, the built-in WLAN adapter continues to work just fine.
What am I missing? Could it be a software problem. Laptop is running Vista, PC has WinXPro.
TIA
Hey there!
Im gonna summarize to make sure I understand your setup correctly. Please correct any errors I have mand in my assumptions.
You state later that all devices are on the same subnet, so Im adding fake ip addresses which I think you are most likely using. Then I will offer a possible solution, and explanation.
You have a wireless route with a built in switch.(192.168.1.1/24)
You have 3 computers.
1 PC with wireless adapter connecting it to wireless. (192.168.1.10/24)
1 NAS device (192.168.1.15/24)
1 Laptop.(192.168.1.11/24)
The default gateway on the all devices is 192.168.1.1 (wireless router internal interface).
When connecting a machine to two different physical networks (wireless included) the PC needs to understand which physical network that data needs to be sent over to get to its destination (your default gateway, or your router). If the physical networks on the ethernet interface and wireless interface are assigned to the same subnet, the PC then has to make a choice on where it should send the traffic to.
In the configuration I describe above the pc will have to choose if it should use the copper or wireless interface. 50/50 chance you hit the right one, and most likely will not work due to murphys law.
If you try a configuration like the following does it work with your pc?
Wireless gateway - 192.168.1.1 255.255.255.0
PC wireless - 192.168.1.10 255.255.255.0
PC Ethernet - 10.1.1.10 255.255.0.0
Nas or Laptop ethernet port that is directly connected to PC - 10.1.1.15 255.255.0.0
This should work to allow your pc to talk with wireless and still talk directly with another device over the copper ethernet connection.
This setup allows your PC to understand that if you want to talk with the world through your wireless router (192.168.1.1) then the PC needs to use the PC's wireless network (192.168.1.10) because your default gateway and that interface are on the same network. The PC will also understand that if it needs to talk with the other device on the 10.1.1.15, then it will need to send the data to the ethernet interface with an address on that network. On the PC it would know to send 10.1.1.xxx traffic out the copper ethernet interface because it is on that network (10.1.1.10).
BTW Vista has ICS enabled by default I think. at least mine did on the laptop I purchased.
Ask if you have any questions over that. Hopefully my description is good. =)
