False packet loss in graphs

[David.adder]

Hi there,

In the last days we are experiencing some issues in the loss packets showed in the graphs. We have many host, in which the ICMP show packet loss between 20-40% although we have try the ICMP directly from nagios server, and we don't lost any ICMP packet. This does not happen in all host, and templates used are the same

I have seen this topic http://support.nagios.com/forum/viewtop ... 40&p=12722 but I'm not able to see it, so I don't know exactly if it is the same problem.

Our nagios distribution is 2012R2.2

I already tried to upgrade, but not able as I see a message for the maintenance licence no available for us (I have been able to upgrade nagios last 3 years with our licence, but we are not able to upgrade no longer.

How can I troubleshoot this in order to fix this problem?

Thank you.

Regards,

[lmiltchev]

I would recommend contacting our sales team at [email protected]. They will help you out with the maintenance issue, so that you could upgrade to the latest version of XI.

[David.adder]

Ok lmiltchev, thank you.

But what about my issue? What would you recommended me to fixed the problem with the packet loss?

[lmiltchev]

What kind of hosts are these - websites, Windows servers, Linux boxes, etc.? Can you show us the exact command that you are running from the command line along with the output of it? Also, show us the graph with the "lost packets".

[David.adder]

These are networking host, just monitoring the ICMP. Some of them monitored using with bulk mode, others monitored using the wizard for generic network devices

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[tmcdonald]

[...] we have try the ICMP directly from nagios server, and we don't lost any ICMP packet.

It actually does look like check_icmp is reporting missing packets. Do you mean you are running a ping directly?

Try running the following and post the results:

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ping -c 30 195.23.24.149

[David.adder]

Yes, I meaned that exactly. We already pinged from server directly as you suggested:

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Thank you

[tmcdonald]

Can you try running check_icmp with the -vvv flag added? That will give us very very verbose output.

[David.adder]

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[tmcdonald]

I don't think this will make too much of a difference, but what language is your console set to?

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locale

It's possible that the number format is screwing things up.

Also, that verbose output looks a little different. What version of the plugin are you using?

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/usr/local/nagios/libexec/check_icmp --version