Finding a network gremlin

[alunr]

Hi guys,

One of my customers networks is exhibiting some strange behaviour...

Basically once you put a new device on it lasts about 10 minutes before falling off the network.

I've run spyware/virus checkers on everything on the netowrk and I've been running ethereal looking for strange network traffic but I've found nothing so far.

Any ideas? Different software to try etc?

Help!!!

[malman]

Have you checked the switch/hub to see if the port is being disabled. Some have anti garbage system (can't remember name of it) and with kill of a port if a NIC goes beserk.

When you say it drops off the network - Network neighbourhood? or ping won't reply.

Desktop firewall software?

does it matter which switch/hub and which wall port?

What new devices? lots of different stuff?

>> Edited by malman on Saturday 2nd April 11:16

[zumbruk]

malman said:

Have you checked the switch/hub to see if the port is being disabled. Some have anti garbage system (can't remember name of it) and with kill of a port if a NIC goes beserk.

It's called "anti-jabber". If a device goes mad and starts "jabbering" (sending nonsense packets) on the network, it disables the switch/hub port).

When you say a "new device" do you mean any device, or a single one? And is it always in the same switch port?

[malman]

zumbruk said:

malman said: Have you checked the switch/hub to see if the port is being disabled. Some have anti garbage system (can't remember name of it) and with kill of a port if a NIC goes beserk. It's called "anti-jabber". If a device goes mad and starts "jabbering" (sending nonsense packets) on the network, it disables the switch/hub port). When you say a "new device" do you mean any device, or a single one? And is it always in the same switch port?

Anti-jabber thats it - thanks that was driving me nuts, but not enough to google