Reporting on change in an SNMP Counter Value

[ryanb]

Hello,

If I would like to track an arbitrary counter using SNMP, how can I report on only the change from one polling instance to the next? It looks like this is done automatically with the router/switch tool by adding the interfaces to an MRTG config and then pulling data from the RRD file. Is there way I can do this for an arbitrary metric via the Nagios XI GUI? Or do I need to modify the mrtg config and then create a command to use something like check_rrdtraf to report on the data?

Also- if I do something like this manually, do I need to worry about Nagios XI overwriting my changes?

When I tried generating the services for the data I am interested in using the SNMP Walk wizard, it did recognize the difference between a Counter and Gauge from the MIB, but Nagios XI doesn't seem to handle them any differently.

Thanks,
Ryan

[ryanb]

Actually- looks like you cannot do this with an arbitrary OID with MRTG. It seems MRTG is specifically for network interfaces.