Intermittently Losing LAN/High Speed Internet Connection PLEASE H

G

Guest

Any Help Resolving This Problem Would Be Greatly Appreciated…
I have 2 computers connected to cable internet service through a wired
router (a Windows 98 older desktop and a 4 year old laptop running Win XP Pro
SP2). I have noticed since around last weekend, I intermittently lose my
internet connection on the laptop. For instance if you are surfing the web,
it just tries to go to the page, but you end up getting the Internet Explorer
page cannot be displayed message. All internet programs lose the connection
not just Internet Explorer. Sometimes the connection icon comes up as
limited connectivitly and sometimes it doesn't. I have searched the internet
and read through a lot of forums on this message boards. I found people with
pretty much the same or a similar problem, but the solutions don’t seem to
work for me. Sometimes my internet connection will work for hours, and other
times it will only last a few minutes. I even plugged a friend’s laptop in
to my laptop setup and it worked for as long as I tested it. Sometimes I can
get mine to work again for awhile if I disconnect the LAN cable from the back
of the computer and reconnect it. Other times that doesn’t work and you just
get the little connection status icon moving that circle thing back and forth
to both computer screens. When you sit on it, it says acquiring network
address. The repair button in the connection dialog box doesn’t work. I
have tired the ipconfig commands I found mentioned and none of those work. I
get an error message that said something to the effect unable to connect to
DHCP server. I then get that 169… ip address that I read about on here.
Rebooting will occasionally fix the problem, but not all the time either. I
have had this setup for a little over two years and have never had a problem
unless it was something on the ISP’s end. The windows 98 machine still
connects to the internet as usual, so I have pretty much narrowed it down to
something on the laptop not the router, cable modem, or ISP. Here are some
of the things I can recall already trying, but have not solved the problem.
I bought a new cat5 patch cable, reset the cable modem and router numerous
times, tried a different jack on the back of the router, updated the nic card
driver, uninstalled and reinstalled the network card driver, ran the ipconcig
commands mentioned here, verified that DHCP was enabled in the router
configuration screen options, tried Chucks suggestions from his networking
problems webpage such as Microsoft’s winsock2 corruption repair utility, I
tired 2 of the freeware repair a corrupted LSP / Winsock layer programs,
tried the NETSH commands at the command prompt, I installed a program to scan
for and remove spy ware (it didn’t find any), ran a complete virus scan with
my anti virus program, I tired reinstalling Windows overtop my current
installation using the repair option on the installation CD. I attempted to
assign a static IP following instructions I found online, but am unsure if I
did it completely correctly, at any rate I still was unable to connect.
Currently the connection has been working for the past hour or so, but I
don’t know how long that will last. I apologize for the long post, but this
has got me completely stumped. It is seems at this point, my only option is
to buy a new laptop, but I don’t want to have to do that.

Thanks in advance for any advice or suggestions you may give.

PhilBy
 
S

__spc__

PhilBy said:
Any Help Resolving This Problem Would Be Greatly Appreciated.

[snip]

It would help if you posted hardware model nos. etc.

When you have the system working, do the IPCONFIG business and jot down the
relevant addresses. Then, go to the NIC in Network Connections and enter
these details. Do the same on the second laptop. No point assigning the
problem laptop a static IP address, if the first laptop nabs that address
from the router first via DHCP.

Make sure that the router has the latest firmware...
 
G

Guest

I entered the correct IP and DNS addresses in the network connection TC/IP
properties settings. The connection worked with those settings, but then It
disconnected again and eventually came back and so on.

My hardware is as follows:
A Compaq Presario 700US laptop with a Realtek RTL8139/810x Family Fast
Ethernet NIC (as reported by device manager)
A Motorola SB5100 Surfboard Cable Modem
A Uniden ENR1504 (Wired Router)

Any additional suggestions would be greatly appreciated...

Thanks

__spc__ said:
PhilBy said:
Any Help Resolving This Problem Would Be Greatly Appreciated.

[snip]

It would help if you posted hardware model nos. etc.

When you have the system working, do the IPCONFIG business and jot down the
relevant addresses. Then, go to the NIC in Network Connections and enter
these details. Do the same on the second laptop. No point assigning the
problem laptop a static IP address, if the first laptop nabs that address
from the router first via DHCP.

Make sure that the router has the latest firmware...
 
F

Fata Morgana

I have a similar problem. I have a laptop that I connect to my home desktop
by LAN. Laptop has WinXP Pro, desktop WinXP Home. It works. I try to do the
same also to my woman's LAN (a different one), but sometimes PCs see each
other, sometimes they don't. I use a simple BAT to change the configuration
of laptop to access a LAN or another. In both cases I use ONLY static IP
addresses, no DHCP (nor I want). I verified cables, hub and firewalls. None
of them is responsible of problem. It looks like in the connection there is
some parameter other than IP address, mask, and the other classic
parameters, that prevent communication.

Is there any tool I can use to monitor binding to try to understand what's
wrong? I spent months on this problem. I have a lot of friends in the same
situation: having a WinXP communicating with another WinXP is just a matter
of luck. Sometimes it works, sometimes it doesn't, even in the same LAN and
with the same configurations. The wizard is useful ONLY if you have ONLY
desktop PCs, that is you have not laptops that sometimes connect to a LAN,
sometimes to another. From networking point of view WinXP is really a mess.
I hate its inability to simply network.

FM
 
G

Guest

UPDATE:

As of yesterday morning I followed this tip from PracticallyNetworked.com
(linked from Chuck's web page). I took it off of automatic. First I tried
100 MB full duplex, as suggested on the site but I shortly lost the
connection as usual. I then tried 10 MB full duplex and it has worked
flawlessly so far. I don't know if it's just a coincidence, or permently
fixed the problem. 10 MB is fine for internet usage through my cable
company, which I primarily use the network for. I also left it as a static
IP address which didn't work on it's own. Since it is currenlty working
normally, I am not going to change anything else. I copied and pasted the
excerpt below incase anybody else with this type of problem would like to
give it a shot.

Specify Explicit Speed and Duplex Settings
By default, network cards are configured to automatically detect the proper
speed and duplex settings. This automatic sensing can fail, preventing the
computer from accessing the network.

In Windows XP, right click the network connection and click Properties |
Configure | Advanced. In Windows 95/98/Me, go to Control Panel | Network,
double click the network adapter, and click Advanced. The name of the
appropriate setting depends on the particular network card. Specify explicit
speed and duplex settings that work on your network. Most switches and
hardware routers use 100 Mb, full duplex. Hubs use half duplex. Here’s an
example, showing how to configure an SMC 1211TX network card that’s connected
to a switch.
 
C

Chuck

UPDATE:

As of yesterday morning I followed this tip from PracticallyNetworked.com
(linked from Chuck's web page). I took it off of automatic. First I tried
100 MB full duplex, as suggested on the site but I shortly lost the
connection as usual. I then tried 10 MB full duplex and it has worked
flawlessly so far. I don't know if it's just a coincidence, or permently
fixed the problem. 10 MB is fine for internet usage through my cable
company, which I primarily use the network for. I also left it as a static
IP address which didn't work on it's own. Since it is currenlty working
normally, I am not going to change anything else. I copied and pasted the
excerpt below incase anybody else with this type of problem would like to
give it a shot.

Specify Explicit Speed and Duplex Settings
By default, network cards are configured to automatically detect the proper
speed and duplex settings. This automatic sensing can fail, preventing the
computer from accessing the network.

In Windows XP, right click the network connection and click Properties |
Configure | Advanced. In Windows 95/98/Me, go to Control Panel | Network,
double click the network adapter, and click Advanced. The name of the
appropriate setting depends on the particular network card. Specify explicit
speed and duplex settings that work on your network. Most switches and
hardware routers use 100 Mb, full duplex. Hubs use half duplex. Here’s an
example, showing how to configure an SMC 1211TX network card that’s connected
to a switch.

Well, we're glad that you were able to resolve your problem, that you were kind
enough to update the thread, and that you were able to find the paragraph key
and make your post readable. ;-)
 

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