By default, whenever the replication mechanism replicates the schema, it sends the entire schema to its consumers. In the following situation, it is not desirable to send the entire schema to consumers:
Modifications to cn=schema using DSCC or from the command-line are limited to the user-defined schema elements, and all of the standard schema are unchanged. If you modify the schema often, sending the large set of unchanged schema elements every time has a performance impact. You might be able to improve replication and server performance by replicating only the user-defined schema elements.
You cannot use DSCC to perform this task. Use the command line, as described in this procedure.