Constant subroutine SNMP_Session::AF_INET6 redefined

mrtg를 구동하면 SNMP_Session 에러가 발생할 때가 있습니다. # mrtg /usr/local/etc/mrtg/ruo91.cfg Constant subroutine SNMP_Session::AF_INET6 redefined at /usr/local/lib/perl5/5.10.1/Exporter.pm line 67. at /usr/local/lib/perl5/site_perl/5.10.1/SNMP_Session.pm