Template:FAQ:Applications 25b

How do I specify IPv6 addresses in tools command line arguments?

IPv6 addresses pose a particular problem for the Net-SNMP command line tools, which parse host names into pieces. In particular, normally if you specify a simple host name, it assumes you want UDP in IPv4 on port 161. IE, these two commands are actually the same (by default):

 snmpget 127.0.0.1 sysUpTime.0
 snmpget udp:127.0.0.1:161 sysUpTime.0

However, for IPv6 this causes a problem because IPv6 addresses also use a colon to separate addressing parts. Thus you need to enclose the address in square brackets ( [ and ] ). Because most shells use these brackets too, you also likely need to quote it:

 snmpget 'udp6:[::1]:161' sysUpTime.0