Before monitor any server you need to install SNMP and RRDTool packages on monitor server and net-snmp package on server which you want to monitor.
lets assume server which has SNMP and RRDTool means monitor server has ip address 10.10.10.1
and server which you want to monitor has IP address 18.104.22.168
SNMP packages require for querring .
– type command at the prompt
#yum search snmp
It will show you different snmp packages.
You neet to install 2 packages
#yum install net-snmp
#yum install net-snmp-devel
RRD store and display time-series data (i.e. network bandwidth, server load average). It stores the data in a very compact way that will not expand over time, and it presents useful graphs by processing the data to enforce a certain data density.
RRDTool 1.2.x has dependancies ,hence you need to install following packages.