You can modify configuration parameters that affect the current Replication Server by using configure replication server at the Replication Server.
To change default configuration parameter values using configure replication server, log in to Replication Server and execute configure replication server at the isql prompt.
configure replication server set config_param to 'value'
The config_param string must match an entire parameter name. You may have to restart Replication Server for the new parameters to take effect.
configure replication server set ha_failover to 'on'
See Replication Server Administration Guide Volume 2 > Replication System Recovery > Configuring the Replication System to Support Sybase Failover.
Restart the Replication Server.
Configuration changes take effect after you restart Replication Server.
See Replication Server Reference Manual > Replication Server Commands > configure replication server.
Be aware of parameters affecting security and see Replication Server Administration Guide Volume 2 > Performance Tuning for parameters affecting performance.