2nd network disables Internet connection

[Geoff Cohen]

My PC is connected to 2 local networks.
Network 1 is via a Linksys USB Wireless Adapter and talks to a Netgear
ADSL Router/Access Point. This connects to my laptop via wireless and
to the Internet.
Network 2 also uses wireless but through an ethernet cable to a D-Link
Access Point. This talks to other IP devices.
The 2 wireless networks have different SSIDs and the 2 networks use
fixed IP addresses in different ranges. Network 1 uses 192.168.1.*,
Network 2 uses 192.168.192.*

Everything worked fine until a couple of days ago when Microsoft
installed some security updates and restarted my computer. Since then
I can now only access the internet from my PC when I disable Network
2, although the rest of the network works fine (internet access from
laptop still works).

Can anyone help? Thanks

 

[Robert L [MS-MVP]]

sounds like routing issue. posting the routing table may help, to do this, use route print command. For more and other information, go to http://howtonetworking.com.

Don't send e-mail or reply to me except you need consulting services. Posting on MS newsgroup will benefit all readers and you may get more help.

Bob Lin, MS-MVP, MCSE & CNE
How to Setup Windows, Network, Remote Access on http://www.HowToNetworking.com
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
This posting is provided "AS IS" with no warranties.
I recommend Brinkster for web hosting!

My PC is connected to 2 local networks.
Network 1 is via a Linksys USB Wireless Adapter and talks to a Netgear
ADSL Router/Access Point. This connects to my laptop via wireless and
to the Internet.
Network 2 also uses wireless but through an ethernet cable to a D-Link
Access Point. This talks to other IP devices.
The 2 wireless networks have different SSIDs and the 2 networks use
fixed IP addresses in different ranges. Network 1 uses 192.168.1.*,
Network 2 uses 192.168.192.*

Everything worked fine until a couple of days ago when Microsoft
installed some security updates and restarted my computer. Since then
I can now only access the internet from my PC when I disable Network
2, although the rest of the network works fine (internet access from
laptop still works).

Can anyone help? Thanks

 

[Geoff Cohen]

Thanks for the tip.
Route print showed that the Default Gateway was set to that for
Network 2 rather than Network 1. Clearing the default gateway setting
for Network 2 resolved the problem.
That begs the question - if the Default Gateway is defined for the
computer, why does Windows allow you to set it for each network
interface?

Thanks again.