Connectivity from Replication Server to DB2 replicate databases can be accomplished using a variety of gateways. However, this connectivity is required only under the following conditions:
You are replicating data into your DB2 database.
You are using automatic materialization to populate your replicate database.
The gateway connectivity that allows Replication Server to issue select, insert, update, or delete statements against the tables stored in DB2 can be configured in many ways. For details on the range of available connectivity options between Replication Server and DB2, see the Replication Server Heterogeneous Replication Guide.
If you set up connectivity at your site, be sure that the Replication Agent-to-Replication Server communication at your site functions correctly, and ensure that your site is prepared for the possibility of additional work involved in maintaining a Replication Server-to-DB2 communications path. Sites without connectivity between Replication Server and DB2 require bulk materialization.
http://www.sybase.com/Partners/certification/index.html on the World Wide Web for information about replication into DB2
“Preparing for Replication” in the Replication Agent for DB2 UDB User’s and Troubleshooting Guide for z/OS for detailed information about bulk materialization