Question about Linksys BEFSR41 Cable/DSL Router W/4 Port Switch, Retail Box (DSLSBEFSR41)

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Linksys WRT54G wireless router problem using Vista

The router was working fine an all the sudden lost connection.Now we have to by pass the router to get on the internet what happened? I need the router working can you help me.

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  • jonest Dec 16, 2007

    i'm wondereing if it is the modem as i still lose internet connection when wired direct to the modem, have spoken to ntl but they've said there's nothing wrong with the line.



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I have both, the Linksys's wireless-g router with speedboost and a linksysrouter 4 port router. At any given time either router can and does drop off. Continue with pasha19's actions, however I suggest before you start unplug the power to the routers. Using a pen press and hold the reset button at the rear of the routers for at least ten seconds. If using a DSL router do the same. Power all back up and continue with pasha19's instructions. Just doing the reset may give you back internet.

Posted on Dec 16, 2007

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The following is not a solution but a set of steps to determine an issue. Wire the router back up -- connect a computer to it using a wire -- can it access the internet? If so the WAN side router config is fine. The issue appears to be a wireless issue. Did the wireless card lose the proper configuration settings to access the router? Did the wireless adapter disconnect and need to be reconnected?

If nothing above was an issue we need to do some other testing -- I do not believe this is likely in this scenario where things were working -- but as we have not yet found out a cause.

Turn all machines on before the test and do not turn off until after

On at least one wired computer that is working and one wireless computer attaching to the linksys router I want you to do the following

Click Start then All ProgramsLinksys WRT54G wireless router problem using Vista - 1.gif then Accessories then Command Prompt

In the window that opens type

ipconfig /all

press enter then record all of the following for each adapter

The back in the window enter the following command using the default gateway from the wired connection (your router address)


you will either get 4 timeouts -- the connection fails or 4 messages with elapsed times generally measured in mLinksys WRT54G wireless router problem using Vista - 1.gifmilliseconds.

What you are looking for in the above
Good entries base
u should be unique for the linksys network1.gif
Wired IP address 192.168.1.u
SubNet Mask ?.?.?.? assuming
Default Gateway
DNS addresses ?.?.?.? not
where at least one is not zero.

Then wireless entries should be
Wired IP address 192.168.1.u should be 192.168.1.u
SubNet Mask same as wired
Default Gateway same as wired
DNS addresses same as wired
If these are wrong there is a configuration error either in the router or wireless adapters depending on how you want your network setup.

each connected adapter wired and each wireless should also
successfully ping the default gateway or router address

If the ipconfig is right and the wired config has successful pings, then every wireless adapter that fails has a wireless config issue.

If you are willing to work through this let me know and reply with information in a comment to this issue.

Posted on Dec 16, 2007

  • david Dec 16, 2007

    You have a point that intermittent problems are hard to identify because they resist any reasonable attempts to isolate them. On your side of their their device you have only the connecting cable (ethernet?) and the computer itself and it's network adapter or your router.

    Are there any indications that a single machine is having the issue? -- I would guess not from what you have indicated.

    Would all machines die simultaneously when the router was connected? from what you have said that is possible and may have been the case recently.

    What could affect all machines silmultaneously with the router hooked up and the individual machine when the router is removed -- there is only a single possible common part -- not belonging to the ISP (who I am not sure is blameless yet there is little we can do about them). -- the ethernet cable from their equipment to either your router or your computer assumimg it was not changed when you disconnected the router.

    Simple test if there are two ethernet cables of comparable lengths in your network to the cable from the ISP's equipment to the router or single computer swap that cable with the one of comparable length. (The odds ov both cables being defective should be very low.) If the suspect cable was the problem it will probably affect the router to computer link that it moved to. The issues that take down the whole network should vanish as the first length of ethernet cable will not be having issues any longer if the theory is correct. After all thos plotting it may make no difference but at the very least we can say we tried something -- and are looking for a difference.

    Other than that you got a lesson in some basic network testing commands like ping and ipconfig and addressing for multiple networks under your control. All in all not a total loss.

    Good luck I'm not sure I have much more to offer without additional input but I will respond to additional comments by you.



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