The slavePort=portValue attribute specifies the port that the slave system will use in database replication.
For more information, see the topics under "Replicating databases" in the Derby Server and Administration Guide.
This attribute may be specified in conjunction with the startMaster=true attribute and the startSlave=true attribute. If it is not specified, the default port value is 4851.
This attribute may be specified only in conjunction with the other attributes permitted with the startMaster=true and startSlave=true attributes.
For examples, see startMaster=true and startSlave=true.