debian/ubuntu snmp has lots of "error on subcontainer ‘ia_addr’ insert (-1)" reports in /var/log/syslog

Modifying /etc/defaults/snmpd and setting "-Lsd" to "-LS6d" in SNMPDOPTS and TRAPDOPTS hides the error message (as suggested by http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=559109).

Or you can use  `sed -i "s|-Lsd|-LS6d|" /etc/default/snmpd`  to fix the problem.