1 router 2 computers - one works, one does not.

[Tmuld]

Hello,

I have a Linksys Wireless G router and 2 XP computers that were
working fine.

Now one get an error that is there is low network connectivity and
cannot connect to anything.

The other computer - fine. So X - no connection, Y - connected

I tried swapping cables - same situation (different ends, new cable,
the one from Y) - X no network, Y is fine. Switched router ports -
same situation X-no, Y - yes

Plugged in modem directly into X - works fine.

I did check the security center in the control panels - in both cases
the fire wall is on, but the windows firewall is off. I cannot
disable the firewall from X - it must be the router firewall (no idea
how to disable it). Again, Y works fine.

I did do the WGA fix recently (remove the windows genuine recognition
hot fix) - but it worked after that. It did however say the versions
of XP were different. I chose to continue and it worked. Only in the
last few days did this problem occur

So only when going through the router does this cause a problem.
Direct connection is fine.

Suggestions on how to proceed?

Thanks!

Tmuld

 

[Tmuld]

Also tried this: still same problem:
http://www.pchell.com/support/limitedconnectivity.shtml

 

[Tmuld]

And computer X works fine in Safe Mode with the router. But no in
regular mode.

hmmmm....

Tmuld

 

[Tmuld]

tried netsh i i r r
and net w r c

still same problem...

weeping now....

 

[Tmuld]

X is showing an ip config e 169.254.x.x i tried hard wiring it to the
IP the router had for it, and DNS servers from my ISP.
Still same problem...

No idea...

 

[Tmuld]

OK...thoroughly confused.

Called Linksys - they could not figure it out. I did do firmware
upgrade, and power cycled the modem and router. Still same issue. Of
course now when I look for DHCP clients, I only see one - the computer
that is not working, not the one that is. When in safe mode - I can
ping the ip address.

Why would it work when in safe mode - connected to the router, and
connected in regular mode with a direct connection to the modem?

I reinstalled the NIC drivers...but it is always giving a 169.254.x.x
address. If I hard code in an IP it keeps it - but still does not
work.
But in safe mode it happily finds an IP.

Beyond reinstalling the OS - any idea what is happening??

Thanks

Tmuld.

 

[Sergio]

What anti-virus do you use?
I had problems with computers using Norton, its firewall is not easy to
configure. I would bet the prob is the anti-virus, or other software
running, that isn't on safe-mode (antivirus is stopped on safe mode).

Tmuld escreveu em 02-07-2007 22:24:

 

[Tmuld]

Any way to disable all of Norton without uninstalling it?

Plus I think it is only Norton Antivirus, does that include a
firewall?

Thanks

Tmuld

 

[Sergio]

I think you can right click on the tray icon and disable-it for a few
minutes.

Tmuld escreveu em 03-07-2007 21:44:

 

[Tmuld]

I tried that. Did not work.

But does Norton start up during boot up process - I am wondering if it
could stop the DHCP process and prevent getting an IP address from the
router in the first place.

Norton is such a pain to uninstall....

Thanks,

Tmuld

 

[Sergio]

then try fixing the ip on the pc to see if the problem is dhcp related.

Tmuld escreveu em 03-07-2007 23:42:

 

[Tmuld]

Hello!

Sergio, I tried assigning an IP to the card - the one the router
showed so it is a 192.168.x.x number - it still will not work - still
get the limited or no connectivity error.

But if I boot up in safe mode it will find an ip address of the router
and work fine. Only the in safe mode.

So I have booted up in regular mode and tried killed all the tasks but
explorer.exe - howevere there are many tasks I cannot kill.

Any suggestions at this point?

Thanks for your help!

Tmuld

 

[Sergio]

Did you assign the same ip the router had assigned before? When using
fixed IP address, you must use one in the 192.168.x.x range as you
stated, BUT, it must be outside the DHCP range configured in the router.

Ex. If you configure your router to assign on max 20 IP addr. with DHCP,
starting on 192.168.1.100, then the range is from 100 to 119 (20
addresses). For fixes IP you must use a number outside this range,
192.168.1.150 for example, or 192.168.1.200 (easier to remember).

If you choose an address in the dhcp range (in the example 100-119) the
router won't recognise the machine.

Tmuld escreveu em 04-07-2007 15:19:

 

[Tmuld]

It has to be OUTSIDE the dhcp range?

Why is that? That is so strange.

I did assign it within the range.


Thanks - will try it!!

Tmuld

 

[Sergio]

you can't choose a fixed ip within the routers dhcp range, because the
router won't recognise the machine. choose one a few numbers, or even
the right next one after the dhcp range. If the range is from 1.100 to
1.150, you can choose 1.151 or 1.200 (doen't matter - as long as it's
outside the range)

Tmuld escreveu em 05-07-2007 15:40:

 

[Tmuld]

Hmm...no luck.

I tried using an IP outside the range - still no luck.

But it works in Safe Mode. So I checked the processes running in safe
mode. Then went into regular mode and killed all the processes so it
was the same as in Safe Mode. Did an IP release and renew - still no
luck.

On the router - it does show the MAC address and IP for the computer
that does not work. It assigns 192.168.1.100.
Again, in Safe Mode - the NIC picks up the IP and works. In
production - no luck.
I reinstalled the NIC drivers, did the winsockxp fix and still no
luck.

I now suspect the OS - I want to remove SP2 from XP - think that will
help? Can one remove SP2?

Or any other ideas of who to trouble shoot this? Is it possible to
log what the computer is doing during a release and renew of an IP?

Thanks,

Tmuld.