On 28 Mar 2006, at 19:09, Travis wrote:
Hello all -
I have a question regarding SNMP traps in Nagios. From my
understanding, this can be done differently depending on what you
need and how things are configured on your network. At this point,
I am currently using Nagios with Active Service/Host checks only.
I'm monitoring Internet accessible services such as status of POP/
SMTP/Web/SSh/DNS etc.. and I'm monitoring local services such as
partition usage/load average/processes etc.. via the NRPE daemon/
client application. However, all these checks are using the plugins
that were provided with the Nagios installation and some of my own
small scripts.
Currently on our Cisco routers, we are able to monitor whether
or not the interface link is up or down, we can also be notified if
a link load passes a certain threshold, say 80%. Again, these are
just using the plugins available either from the Nagios
installation or from Nagios exchange. But what I want to be able to
do, is configure traps so that Nagios can be notified when other
things occur such as: power supply failure, input queue reaching a
certain level, latency if possible and many other things that are
defined in the default MIB of our Cisco routers.
So my question is, what is the best way to monitor these things?
What are all my options? My understanding is that I would have to
configure the traps on the Cisco device to send event information
to a central snmptrapd, then that info is passed on to the Nagios
host which is listening for Passive Checks which will then alert us
via pager/email etc..
But my question is, how is all this done? How do I configure the
Monitored host to send these events to snmptrapd? How do I
configure the snmptrapd? How do I configure snmptrapd to pass this
info onto Nagios? Do I need to use SNMPTT as an event correlator
or not? If so, how is that configured? What all has to be defined
in Nagios for the paging to happen once it sees the passive check
result in the external command file?
Anyway, I am open for suggestions. Examples of how things are
configured would be great. Try to break it down so that I can
understand what's doing what and how.
All suggestions / information is greatly appreciated. Even if
it's just pointing me to the right documentation. Thanks a bunch !!!
Travis,
A single post would have been sufficient :)
We've been implementing SNMP traps and we've written an article on
our experiences on it. It is only a pointer to how things are done,
with a perl module that can help - SNMP::Trapinfo - There is still
integration work that needs to be done, but it is a start.
http://altinity.blogs.com/dotorg/2006/03/lessons_in_snmp.html
Ton
http://www.altinity.com
T: +44 (0)870 787 9243
F: +44 (0)845 280 1725
Skype: tonvoon
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