Advanced Replication Guide : Using advanced replication with applications : Setting up databases for synchronization : Configuring the master database(s)
  
Configuring the master database(s)
Before you begin, be sure you have defined your master database(s). For details, see Defining master and replica databases.
To each master database, provide a node name that is unique within the domain. For example:
SET SYNC NODE "MASTER";
COMMIT WORK;
See also
Setting up databases for synchronization