Run the below commands:
yum install net-snmp
yum install net-snmp-utils
snmpconf -g basic_setup
mv /root/snmpd.conf /etc/snmp/
vi /etc/snmp/snmpd.conf
Then check if the below line is in the snmpd.conf
view systemview included .1.3.6
service snmpd restart
chkconfig snmpd on