Today I have finished install mrtg for my idaemon server and here are the perfect setup instruction for who run centos 5.1 in the box.

check this instruction you will not regret, after I have try from many source and googled all day this is the way out!

Part I : SNMP Server

we need to install snmp service to make mrtg graph work.

#yum install net-snmp-utils net-snmp

after it installed make this service that run automaticaly.

#chkconfig --level 345 snmpd

run it.

#service snmpd start

check service that run properly.

#netstat -natv | grep ':199'

look into the line that should be.

tcp 0 0 127.0.0.1:199 0.0.0.0:* LISTEN

now we must check this service.

#snmpwalk -v 1 -c public localhost IP-MIB::ipAdEntIfIndex

the output should be like this. note that 192.168.0.3 is your network ip or internet ip.

ip.ipAddrTable.ipAddrEntry.ipAdEntIfIndex.127.0.0.1 = 1
ip.ipAddrTable.ipAddrEntry.ipAdEntIfIndex.192.168.0.3 = 2

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