When running multiple brokers on the same operating system image one generally needs to address the instances via their specific port.
This is usually done by mapping the brokers to their assigned port names in, for example un unix, /etc/services:
ETB001 1971/tcp
ETB002 1972/tcp
Now, when talking to the brokers from, for example, a Windows box, that broker/port mapping must be available there as well, either in the “services” file, or thru a DNS entry.
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