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I have this weird problem with different WLAN's:

  • I have a laptop owned by university A, with user credentials for their LAN
  • I also have access to 'eduroam', a WLAN that is available at almost every university in Europe
  • There is one particular institute (let's say university B) that's causing trouble. If I connect to eduroam there, everything works just fine.
  • Whenever I go home and use the home WLAN, I have internet connection, but no connection to other PC's on the network.
  • Then I connect to university A again, and connect to their LAN
  • When I get home (WLAN), everything works fine again.

It's almost as if university B screws up some settings, which are fixed by connecting to the LAN of university A. I haven't got a clue what it might be.

Some additional info: * Laptop OS: Windows XP SP2 * Other home PC OS: Windows 7 (usually network traffic is working fine) * In the "broken" state, ping between the laptop and home computer (in any direction) results in 100% loss of packages. ping-ing the router, however, works fine (internet also works fine).

When trying to mount a network share to \\<computername>\<sharename>, windows returns

An error occured while reconnecting Z: to \\<computername>\<sharename>
Microsoft Windows Network : The local device name is already in use.
This connection has not been restored

Trying to navigate to \\computername with explorer returns

Windows cannot find '\\<computername>\'. Check the spelling and try again, 
or try searching for the item by clicking the Start button and then clicking Search
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1  
Is the IP range used at Uni B eduroam the same as the IP range you use at home? – Paul Feb 7 '13 at 20:59
    
@Paul: not sure, but ipconfig indicates that back home the IP is from the range used by the home router. I'll be sure to check the IP range of Uni B next time I'm there. – Martijn Feb 7 '13 at 21:23

When you get home, and the laptop is in the broken state:

  • Open a command prompt
  • Type ipconfig /release
  • Then ipconfig /renew

This should reset all the settings from the old setup and grab new settings from your home setup.

Hope this helps.

share|improve this answer
    
I'll definately try this next time I have the problem. Thanks – Martijn Feb 8 '13 at 8:15
    
This does not solve the problem (sorry): it appears the connection is reinitiated, but the problem persists (also after an additional reboot) – Martijn Feb 8 '13 at 15:14
    
Maybe I should add that I use wireless LAN at home. – Martijn Feb 8 '13 at 15:15

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