net-snmp/net-snmp.logrotate

/var/log/net-snmpd.log {
   compress
   dateext
   maxage 365
   rotate 99
   size=+1024k
   notifempty
   missingok
   create 600 root root
   sharedscripts
   postrotate
       /etc/init.d/snmpd reload ||:
       if [ -x /etc/init.d/snmptrapd ] ; then \
          /etc/init.d/snmptrapd reload ||: ; \
       fi
   endscript

}