Most imqcmd subcommands use the -b option to specify the host name and port number of the broker to which the command applies:
If no broker is specified, the command applies by default to a broker running on the local host (localhost) at port number 7676. To issue a command to a broker that is running on a remote host, listening on a non-default port, or both, you must use the -b option to specify the host and port explicitly.
Literal IP addresses as host names: You can use a literal IPv4 or IPv6 address as a host name. If you use a literal IPv6 address, its format must conform to RFC2732, Format for Literal IPv6 Addresses in URL's.