It's on-it's off-it's on, it's off -WHY?

It's on-it's off-it's on, it's off -WHY?

Post by Smart-Ale » Sat, 09 Oct 2004 01:19:45


IS THIS THE CORRECT FORUM? Hope so.
We have three computer networked at home...all with Windows XP. one of those
is a laptop. Some mornings all 3 can see each other and transfer
files...then mysteriously one or more will disappear. No contact....then
later it's back. The laptop is the worst. Most often it won't let us
in...but sometimes it will. No obvious reason. The most INFURIATING part is
the message "see your administrator". Dammit Bill Gates...don't you realize
that most networks are small offices without a Majestic Royal Administrator
sitting his ivory tower. They are MY computers, I bought them, I set them up
and I am His Majesty the Royal Administrator so stop referring to some
mysterious third party. (ok..so much for the soapbox)...

does anyone know why networks go on and off and on and off and on and off.

(notso) Smart-Alex
 
 
 

It's on-it's off-it's on, it's off -WHY?

Post by Fred Marsh » Sat, 09 Oct 2004 03:53:29

Alex,

You didn't say anything about the type of network or the arrangement. You
need to:

All wired ethernet or some wireless?

Is there a switch, router, hub, ???? what connects the computers together?
Brand and model.

Are you using "Get an address automatically" or setting IP addresses
manually?

If you run the Command Prompt / "DOS window" program on each computer:
(Start / Run / CMD <return/enter>
You will get a black window with something like:
C:\xxxx\xxxx> <--and you will type right here

Type:
IPCONFIG <return/enter>

what results do you get for each computer?
When it's working?
When it's not working?

Fred

 
 
 

It's on-it's off-it's on, it's off -WHY?

Post by Smart-Ale » Sun, 10 Oct 2004 05:23:23

Fred
To answer your question...

It's a wired network with a D-Link 10/100 Switch connecting the 3 computers.

The Laptop is an Dell Inspiron 4100...the other two are custom..with AMD2600
processors in both. One has 512 and the other 1G of Ram.

I am set it to get address automatically.

I get a different IP for each. The computer that accesses the web is
198.168.0.1 and the other are the same with 198.168.0. ---- with different
final 3 numbers.

There is no rhyme or reason as to when or under what circumstances that it
doesn't work. Sometimes, the Laptop is invisible...sometimes it my wife's
computer...sometimes in both directions...other times in just one.

Does this help?

Alex
 
 
 

It's on-it's off-it's on, it's off -WHY?

Post by Fred Marsh » Sun, 10 Oct 2004 08:52:18

Alex,

Well, it helps a bit but leaves out a lot of critical information.

You didn't say anything about "the web" before did you? So now I'm curious
regarding how you connect to the web. Either
- one of the computers has two NICs and is running internet connection
sharing (ICS),
- has USB to modem plus ethernet to LAN running ICS or
- the D-Link box is more than a "switch" and is actually a router that
connects to the web via DSL. You didn't provide a model number so ....
- or .......

If the addresses are in the range 192.168.0.xxx then the D-Link box is
likely a router with DHCP enabled - and not a simple switch. Or, perhaps
this is being set up with DHCP and ICS on one of the computers using a
dialup connection to the internet?

I can imagine this as a possibility:
- The cables are home-made and aren't correctly wired. You can build a
cable with consistent pin-outs that is still incorrect because of the misuse
of the twisted pairs. The order of the wires isn't intuitively obvious.....
Depending on the length of incorrect cables, they may work, not work or be
flaky depending on their surroundings.
- See http://www.yqcomputer.com/
description of how to wire the cables. EIA/TIA 568 B is the most common
standard in use these days.

Fred
 
 
 

It's on-it's off-it's on, it's off -WHY?

Post by Smart-Ale » Tue, 12 Oct 2004 08:08:45

red...sorry...it's DSL I connect using a USB Alcatel modem. I connect from
my computer and I have an VIA Rhine II ethernet card.
The model # of the Switch is a D-Link DSS-5+

I am using the regular ethernet cables...not cross-over. Two computers are
fed by 25ft cables.

One of the main problems seems to be the message, "you do not have
permisssion"...then an hour later I do....then later I don't again.

Alex


"Fred Marshall" < XXXX@XXXXX.COM > wrote in message
news: XXXX@XXXXX.COM ...


 
 
 

It's on-it's off-it's on, it's off -WHY?

Post by Fred Marsh » Tue, 12 Oct 2004 10:13:59

lex,

Yeah but you didn't say if the cables were home-made or manufactured and
whether the wiring method was in accordance with EIA/TIA 568 B or something
nonstandard or ..... This could very well matter.... Yes, straight
cables, not crossover.

Hmmmmm... OK, you didn't say that any of the computers can't reach the
internet did you? Assuming that's the case - that you can reach the
internet on all of them - then it sounds like a network browsing problem.
I would suggest two things:
1) Make sure the workgroup is the same on all the computers.
2) have only TCP/IP protocol installed on each of the interfaces - not
NetBEUI and not IPX.
3) Wait for a while - at least 30 minutes.
4) See if all computers now can't see all other computers.....
Note: if you are turning the computers off and on a lot or if you are
rebooting a lot then you could be losing the network browser configuration.
I think the best way to solve this is to leave one of the computers turned
on all the time.
Then, assuming the laptop is connected only some of the time, do this to the
laptop:

Stop/disable the "Computer Browser" service. You can use the services
control panel (or right-click "My Computer" --> Manage --> Services) to
stop the service then set the startup parameter for the service to "on
demand" or "disable". The machine will still be able to browse the
network but it can't become browse master.

Also see:

http://www.microsoft.com/resources/documentation/Windows/XP/all/reskit/en-us/Default.asp?
url=/resources/documentation/Windows/XP/all/reskit/en-us/prcf_omn_mzox.asp

Fred

"Smart-Alex" < XXXX@XXXXX.COM > wrote in message
news:fijad.9803$ XXXX@XXXXX.COM ...


 
 
 

It's on-it's off-it's on, it's off -WHY?

Post by Smart-Ale » Thu, 14 Oct 2004 07:18:14

o the cables were bought at Staples.


"Fred Marshall" < XXXX@XXXXX.COM > wrote in message
news: XXXX@XXXXX.COM ...