Wireless connection problem

21 Dec 2005 2:25 PM

Jim Matthews

I administer an environment of 50+ laptops - all configured the same - using
a wireless network.

We also use IBM Access Connections to manage various connections and
Zonealarm for firewall, antivirus, antispam, etc

One of these laptops will simply, without warning, simply lose its
connection to the network and will not recover.

The truly interesting thing is that, in all cases, it can "find" the access
point - it simply will not find the DHCP server. Manually assigning an IP
address does not fix the problem

I have tried:

-Using a different wireless NIC (works for a while and then same problem)
- Removing and reinstalling the NIC/Driver
- Removing IBM access connections, and using XP's configuration (something
expressly forbidden by IBM support)
- Removing and reinstalling IBM Access Connections
- Removing Zonealarm

The sporadic nature of this is making me nuts.

For the most part, but not always, it happens at approximately 3PM. There
are no scheduled tasks that I can see for that timeframe

Anybody with an idea how to debug this ?

Many Thanks

JM

22 Dec 2005 8:48 AM

Hans-Georg Michna

On Wed, 21 Dec 2005 08:25:03 -0600, Jim Matthews wrote:

>One of these laptops will simply, without warning, simply lose its
>connection to the network and will not recover.
>
>The truly interesting thing is that, in all cases, it can "find" the access
>point - it simply will not find the DHCP server. Manually assigning an IP
>address does not fix the problem

>The sporadic nature of this is making me nuts.
>
>For the most part, but not always, it happens at approximately 3PM. There
>are no scheduled tasks that I can see for that timeframe
>
>Anybody with an idea how to debug this ?

JM,

I don't know how to debug it, but that may not be necessary, as
there are some common causes for this behavior, perhaps most
prevalently Winsock corruption.

You can use http://winhlp.com/ to find the solution.

Hans-Georg

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