I have inherited a Nagios infrastructure as the new guy around and have no experience with the platform, whatsoever. My dilemma is:
I have few IBM AIX servers that Nagios monitors. All of them are using EtherChannel interfaces. Both legs of the EtherChannel are alive, providing a fat-pipe for network operations.
Every once in a while, I was told, not seen it with my own eyes, pinging the ip address of any of these AIX servers, yields more return packets than packets sent. I was again told that this is because of the Cisco switches and router's action abnormally at times but we have no control over network operations group. So I can not even suggest them to fix their part. All I can do, is, either modify the Nagios Server to ignore higher than 100% return packets count or modify the client which is being pinged, not to send multiple responses to the same packet. Problem is, I don't know how to accomplish either task and need a crash course in Nagios.
My initial questions are:
who is in charge of (initiates) the ping connectivity check task ? Nagios central server or the Client ?
how does it decide it has succeeded or failed ? Any way to change the success or failure criteria ?
Thank you in advance