As a sysadmin its always pain when our system log gets filled with unnecessary logs . snmpd is one among that .
Lets try change as below to config files and restart the service . Then logs wont generate .
For all Linux version 5 :-
cat /etc/sysconfig/snmpd.options
# snmpd command line options
OPTIONS="-LS0-5d -Lf /dev/null -p /var/run/snmpd.pid -a"
# service snmpd restart
For all Linux Os version 6 :-
cat /etc/sysconfig/snmpd
OPTIONS="-LS0-5d -Lf /dev/null -p /var/run/snmpd.pid"
# service snmpd restart