[dba-Tech] Vista looses frequently LAN connection and can'treconnect via DHCP

Jim Lawrence accessd at shaw.ca
Wed Jun 17 10:40:18 CDT 2009


It is lucky that this type of hardware failure is rare. When you posed the
question yesterday and said the problem was affecting multiple computers it
seemed like it could be the answer... I am glad you discovered the source.

I have had similar situations one being a bank and at 5:00AM with some
earlier birds (managers, stock-brokers) drifting in... We started checking
ports on a switch to find 8 ports on a bank dead.

The worse incident was when I was working alone in a casino, clients were
starting to pouring in and a couple of monitoring and application stations
were refusing to connect... which meant the casino was effectively down...
It was discovered that one bank on a switch was going off and on and there
was no extra ports. I connected my tester hub to a live port and populated
it with links from the defective bank... it worked until a new switch could
be acquired... The new switch was rocketed in, with a police escort, in
about 15 minutes but that is another story. ;-)

Keep your fingers crossed.  

Jim

-----Original Message-----
From: dba-tech-bounces at databaseadvisors.com
[mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of Gustav Brock
Sent: Wednesday, June 17, 2009 5:54 AM
To: dba-tech at databaseadvisors.com
Subject: Re: [dba-Tech] Vista looses frequently LAN connection and
can'treconnect via DHCP

Hi all, a follow-up

We equipped a laptop with a fixed IP address but it still failed so we had
to look elsewhere than at the DHCP function for the source of error.

Further research revealed that those workstations never failing were
connected to the right bank of 8 ports of 3 banks in total on a central Dell
switch (not delivered by us) while all those that did fail - including the
bridge for the WiFi and the workgroup printer - were connected to the left
and center bank of ports. Only 7 nodes were attached; moving these to the
right bank of ports seems to solve the issue. Fingers crossed.

A new HP switch will be set up next week.

/gustav


>>> Gustav at cactus.dk 16-06-2009 15:38 >>>
Hi all

Anyone having trouble with this?
We have a client where Vista client laptops frequently pops off and on the
wired LAN. Sometimes the new DHCP request fails and the pc stays
disconnected. Later you can reestablish connection.

We located this:

http://en.kioskea.net/forum/affich-45038-internet-disconnects-when-2nd-user-
is-on#p45086 

with links to these:

http://support.microsoft.com/kb/928233 

and as the client often use sleep mode for the laptops:

http://support.microsoft.com/kb/933872 
http://support.microsoft.com/kb/928152 

The router is an older Zywall so the KB article may apply  haven't check
that yet - but I wonder if anyone have some other ideas?

/gustav


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