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I'd like to automatically monitor all ports on my switches and get notified whenever a port goes down. So far I have to connect to each switch manually and read out the disabled ports by hand:

show interfaces status err-disabled

I'd much prefer if ports that went down would get automatically reported to nagios. Based on my preliminary research, it appears that I need to configure snmp-traps.

My questions:

  • what are the commands that I need to execute to automatically detect err-disabled events and send the switch name, port name (gigabitEthernetx/y/z) as well as the reason for the error (security violation, loop detected, etc) to nagios?
  • do I need to configure this on each switch that belongs to a stack, or can I do this on a master switch?
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You're going to have to do a bit of configuration, but there is a guide here that should work for you (http://askaralikhan.blogspot.com/2010/12/receiving-snmp-traps-in-nagios.html).

As long as you are comfortable getting snmptrapd up and running you shouldn't have any problems with following the guide.

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    This site is not about blog promotion. Please post the contents of the recipe here.
    – Deer Hunter
    Jan 17, 2015 at 6:28
  • Your answer doesn't seem to address my problem. I only want to detect these error events mentioned above and automatically detect the affected ports.
    – memyself
    Jan 17, 2015 at 7:38

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