laptop - Will connecting your internet via wirelessly to Router 1 and Ehternet to router 2 at the same time cause probs ?

Two routers in a coffee shop business.

Separate phone line ADSL > Router 1 Private
Separate phone line ADSL > Router 2 Public for customers

Business laptop is always connected via ehternet to Router 1.
If www doenst work on Router 1 workers in the office (not custoners) are wirelessly connecting to Router 2.  while leaving the Ethernet cable in.

Does this cause <possible> networking probs for workers on the business laptop on router 2 as the laptop is now connected on two routers at the same time.    

Im going to disable wireless on the laptop and give them one spare cable for each router as a back up plan if broadband fails, that way it rules this out.

They are having intermittent www issues and Im wondering is/was this a poss cause.
feck1Asked:
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KimputerCommented:
A laptop will always ONLY USE ONE connection, even if both are connected. Windows is usually smart enough to chose the LAN over wifi.
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Thomas GrassiSystems AdministratorCommented:
I have seen when you leave the wireless connected network problems on that machine only can occur.

You thoughts of disabling the wifi are correct.

Are router 1 and Router 2 the same brand model? Do they have a fall over option.

Best would be have the router switch than to have a user change a cable. You know what will happen later you will get a call I can not connect and they are plugged into the wrong router,
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Dirk MareSystems Engineer (Acting IT Manager)Commented:
In theory what you want to do will work because both sides will handle default routes 0.0.0.0/0

What you can do is set the Automatic metric section on the LAN and Wifi interface to different values.

LAN= Primary; metric 10
Wifi= Secondary; metric 20

Not 100% sure how the fail-over will work. But play around with it you wont break anything.

DirkMare
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feck1Author Commented:
As the laptop never leaves the building and there are several people using the Laptop at different times beside both routers Ive disabled wireless to rule out a possible clash / problem.

It also rules out a security issue of connecting a work laptop to a public wifi intended router
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