Re: Loss of Connectivity on Only One PC on a LAN

Chuck wrote:

"Now I reread your previous post, and it confused me. Are you enabling, or
disabling, power management on the Ethernet card? Does the disconnection happen
when the computer is busy, or when it's idle?"

Hi again: The only Power Management Option I see regarding the Network Adapter is found at: LAN-->Properties-->General-->>Configure.

There is a Netwotk Adapter Power Management option box there to allow the computer to turn the device off to save power.


It's unchecked on both PC's. In other word: Power Management for the Network adapter is disabled. I disabled it after the problem first occured, but it didnt resolve it.

Under CONFIGURE for the Network Adpater--at the General tab--I get the following:


"This device is working properly.
If you are having problems with this device, click Troubleshoot to start the troubleshooter."

The disconnects generally happen when I'm not using the PC, though I always leave the connection on. When I attempt to use the PC in the late afternoons- after not using it for a few hours, I often see that yellow exclamation sign with the "Limited or no Connectivity" at the connection icon in the sys tray. The other PC remains with normal connection.

We've had this LAN working properly since late July. The problems first began on September 18.

I can try and verify if the other PC is still connected when I unplug the modem. I can't see how it could be since it's the modem which allows her to connect to the interent.

Chuck wrote:

" Does the other computer connect by Ethernet? If so, try swapping router ports
and cables between the 2 computers. Then wait until the problem reoccurs."

I think so, but it's an external network adapter. I believe it's a Linksys Adapter that she uses for the LAN in question.. I could try swapping ports on the Router, if she's willing ot allow me, but swapping the cables would be a bit tricky since her cable is only a few feet long and mine is between 50-60- ft. I'd have to purchase a new cable wire to try that.

Chuck wrote:

"If you have another computer, and it's NEVER (?) experiencing this problem, I'm
not sure that you should have to disconnect the modem, at all. Please verify
that the other computer loses connectivity when you do this."


I wish there was an easier way to do this, as this annoys the other user on the LAN, but I haven't found one...

I assume she loses her connection as well--when I unplug the Modem and Router-- since those are what she uses to connect as well. But I'll try to verify this .

If you don't mind, I have another piece of info which may or may not be relevant to the problem here:

I also noticed the following:

Control Panel-->Network Connections-->
I click on the LAN being used:

Properties-->Advanced-->

Brings me to the pane about the Windows Firewall/ICS.

Midway down that pane:

"Internet Connection Sharing"

Both boxes about allowing other nework users to connect and/or control are checked in.

However, when I click on SETTINGS on that Internet Connection Sharing portion of that advanced panel. I see:

I see : Services

"Select the services running on your computer that Internet users can access"


Below that panel is a vertical array of eight unchecked boxes including:

DHCP[67], DHCP[68], DNS, FTP Server, UPnP[TCP], UPnP[UDP]...etc...

1) Am I corect in asuming that Internet users there means users on that LAN?

2) Should any of those uncheked boxes be checked in?

Thanks again.

-Eli


************************************************************************************************************************

"Chuck" <none@xxxxxxxxxxx> wrote in message news:otajh25mhi34o7rr73pslonk39ogq8qaus@xxxxxxxxxx
On Tue, 26 Sep 2006 17:20:07 -0400, "eli" <nobody@xxxxxxxxxxxx> wrote:

Hello:

I posted about this several days ago, but it seems the thread got lost.

Kindly excuse the repetition.

I had followed the troubleshooting steps on that Chicago Tech site as recommened to me when I first posted here:
www.chicagotech.net/troubleshooting/noconnectivity.htm


. [I'll summarize the steps taken below]

=================================

I use a LAN connection which consists of two PCs each connected to a Linksys BEFSR 41 Router.

The Network Card on my PC is:
Model: Intel(R) PRO/1000 MT Network Connection -

Help and Support-->Tools-->My Computer Info-->Hardware shows the driver for this to have been installed last December and to be supported.


" Model: Intel(R) PRO/1000 MT Network Connection - Packet Scheduler Miniport
Driver: e1000325.sys
Friday, December 23, 2005
Supported "




I get frequent--almost daily--disconnects of my Verizon DSL connection with a "Limited or no Connectivity" reading appended to a yellow exclamation point on the system tray icon.

This happens only on my own PC and never on the other PC on the same LAN.

I can restore the connection only by unplugging both the modem and router for about 30 sec and replugging them

When this happen,s there generally are DHCP warnings in my Event Viewer with 1003 and 1007 event ID's. The 1007 Event ID's read in part:

===============================
"Your computer has automatically configured the IP address for the Network Card with network address 0008742516DF. The IP address being used is 169.254.245.117. "

"Explanation :

The DHCP Client service on your computer did not receive a response from the DHCP server to the DHCP Discover message within the time limit; therefore your computer's IP address was assumed to be invalid, and the DHCP Client service generated another IP address."
===============================



That ISP beginning with 169.x.x.x yields a 'Limited or no Connectivity" connection. At this point I need to unplug modem and router and replug them as described above.

"Network Diagnostic Scan" run at Help and Support-->Tools----Network Diagnostics generally show PASSED on all parameters. They seem quite detailed. There is an occasional ping failure in these results, but it inevitably resolves when I rerun the same Network Diagnostic scan a bit later.

I looked into a possible WinSocket registry corruption, but the data I gathered from advanced system info at Help and Support--->Detailed System Info [Msinfo32.exe]-->System Summary-->Components--Network-->Protocol seemed to rule that out as described in an MS KB article on Dx a WinSock registry corruption. Futhermore, the Error readings are completely diferent than depicted there for a winsock registry corruption.

My Windows XP Firewall is turned OFF , but the Windows Firewall/ICS Service is on Automatic startup type as recently recommned on this newsgroup.

So I have no idea as to why I'm getting those "Limited or no Connectivity" disconnects only on my own PC and not on the other.

I use Zone Alarm Security Suite for both AntiVirus and Firewall functions.

Any further suggstions on resolving this connectivity issue?

Thanks in advance:

-Eli

===========

Windows XP Professional Edition SP2

Zone Alarm Security Suite 6.1.744.001

The Network Card on my PC is:
Model: Intel(R) PRO/1000 MT Network Connection

Hi Eli,

OK, so we will continue here.

A periodic disconnection, repaired by physically disconnecting (ONLY?) the modem
and router, does not sound like an LSP / Winsock problem. But with all due
respect to Microsoft, the native netsh command is not the only way to fix such a
problem, and their advice isn't always complete. So we'll save that for later.

If you have another computer, and it's NEVER (?) experiencing this problem, I'm
not sure that you should have to disconnect the modem, at all. Please verify
that the other computer loses connectivity when you do this.

Does the other computer connect by Ethernet? If so, try swapping router ports
and cables between the 2 computers. Then wait until the problem reoccurs.
<http://nitecruzr.blogspot.com/2005/08/solving-network-problems-tutorial.html#Three>
http://nitecruzr.blogspot.com/2005/08/solving-network-problems-tutorial.html#Three

Now I reread your previous post, and it confused me. Are you enabling, or
disabling, power management on the Ethernet card? Does the disconnection happen
when the computer is busy, or when it's idle?
<http://nitecruzr.blogspot.com/2005/06/does-your-computer-lose-network.html>
http://nitecruzr.blogspot.com/2005/06/does-your-computer-lose-network.html

--
Cheers,
Chuck, MS-MVP [Windows - Networking]
http://nitecruzr.blogspot.com/
Paranoia is not a problem, when it's a normal response from experience.
My email is AT DOT
actual address pchuck mvps org.

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