root@monitor1:/usr/src/nagiosplug/plugins# ./check_snmp --version
check_snmp v1.4.16.72.gf4bbd (nagios-plugins 1.4.16)
root@monitor1:/usr/src/nagiosplug/plugins# ./check_snmp -H 'ipv6.hostname.example' -C 'public' -o '.1.3.6.1.2.1.25.1.1.0'
External command error: getaddrinfo: ipv6.hostname.example Name or service not known
Neither can 1.4.14.
2013-01-29 01:32:44 PST in Nagios Plugins