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Try disabling the NIC and adding a new one. Possibly a bad batch of NICS
that the laptops all share. MAC ##s all in a row?

 

 

 

David Isham
Network Administrator
Grand Isle Supervisory Union
5038 US Rte 2
North Hero, VT 05474 
802-372-6921 vox
802-372-4898 fax 

 

________________________________

From: School Information Technology Discussion
[mailto:[log in to unmask]] On Behalf Of David Curtis
Sent: Tuesday, April 13, 2010 10:00 AM
To: [log in to unmask]
Subject: Re: Network problems with HP 6735b

 

Have you checked the MAC address? It is rare, but I have seen it once
that two devices had the same MAC address.

 

Also a bad card can cause that kind of problem.

 

From: School Information Technology Discussion
[mailto:[log in to unmask]] On Behalf Of Rick Mallon
Sent: Tuesday, April 13, 2010 9:16 AM
To: [log in to unmask]
Subject: Network problems with HP 6735b

 

Looking for ideas - 

We have been tracking down a problem on our network where a switch port
shows excessive traffic, to the point that it locks up the switch
completely for a short period of time, (up to a minute). It you pull the
cat5 connection to laptop it stops the problem. We have hunted for
malware, viruses, bots, replaced software drivers, changed switch ports,
and reloaded Windows and all software on one laptop.

The only thing in common is that they are the same model laptop bought
at the same time. HP 6735b.

Rick Mallon, Director of Technology, St Johnsbury School District

 


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