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My SNMP monitoring server (Nagios) has a handful of plugin files for network interface monitoring, none of which so far have really helped me, or my parameters are not correct. I am monitoring remote CentOS (versions 6 & 7) servers in other datacenters. These datacenters charge per month for the total in/out traffic of each server.
I am looking for an end result where I show the cumulative of the in and out counters. Basically, imagine looking at a line graph and the line would basically just keep going up.
To get more advanced, I would like it to reset monthly and start over. Difficulties come into play here because I know these counters can reset if the remote server is rebooted.
A utility such as 'nload' shows me the Total. Is there such a plugin or SNMP script anyone may be aware of that can pull this information, or a quick way to get me started in writing one?
I appreciate any and all assistance.