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How to check for Network interface collision using Nagios

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Last Modified: 2012-06-27
Hey

I was hoping someone knows how to do this :)

We have a few production servers that is currently monitored by Nagios. But we ran into an situation where some clients had issues, after allot of searching and trouble shooting we found that the one connecting servers (Ubuntu 6 server) had collisions on its main Network Interfaces (ifconfig lists collisions at:12925212) , all the other servers collisions were sitting at 0. We believe the connection issue is due to the collisions on the network interface (My Manager is investigating how to fix it :P ).

But now I have the task to find away to monitor the network interfaces for collisions and if there is, an alert or notification needs to be sent.

Thus is there away to use Nagios to monitor a Linux Based machines Network Interface for Collisions specifically.

Thx
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Cool thanks, I will check if I can find a SNMP check that can do that.

But in answer to your question about the duplexing. We did have an issue on the switch about 3 weeks ago that it put all the Servers connected to it onto Half-Duplex. We then ran ethtool on the servers for the affected NIC's and switched of the NIC's auto and forced it onto Full. The switch is a cisco switch and we didn't change the duplexing or the auto settings on it, mainly because we don't know how to. I will google quickly to see how to cahnge the Cisco switch interface duplexing settings.

Do you maybe know what the results could be for forcing the servers NIC's to a forced full duplex state while the switch is still on Auto, could it also cause connectivity issues or other network issues?
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