MirrorMaker 2.0 question

Hello,

I'm doing some tests with MirrorMaker 2 but I'm stuck. I have a couple of
kafka clusters, I think everything is set up correctly. However, when I run

/bin/connect-mirror-maker /var/lib/kafka/data/mm2.properties

the result I get is the creation of the topics

mm2-configs.A.internal,
mm2-offsets.A.internal,
mm2-status.A.internal

but not of the specific topics found in cluster A (topic1).

The mm2.properties configuration is basically a copy of

https://github.com/apache/kafka/blob/trunk/config/connect-mirror-maker.properties

modifying bootstrap servers

A.bootstrap.servers = 127.0.0.1:29092
B.bootstrap.servers = 127.0.0.1:29093

Can anyone advise me with this problem? Is it possible that some
configuration in mm2.properties is missing? Are there any real requirements
regarding the configuration of the kafka clusters that may be overlooked?

Thank you for your help,
Miguel Ángel