Replication Server version 15.7.1 - Sybase ASE 15.5, how to change primary data server in RSSD?
You're going to need to provide more details on what you mean by 'migrate the current Sybase data server', eg, are you moving the dataserver? are you copying the dataserver? something else?

Also, there's generally nothing to do directly in the RSSD.  All commands should be issued either in the PDB, the PRS/RRS, and/or the RDB.



Generally speaking ...

If a database has been copied from elsewhere (eg, dump and load), you'll want to make sure the old repagent info is discarded and the old secondary trunc pt is removed, eg:

use new_db
go
-- in case repagent is running:
exec sp_stop_rep_agent 'new_db'
go
-- discard repagent config settings
exec sp_config_rep_agent 'new_db','disable'
go
-- in case sp_config_rep_agent didn't remove 2nd tp:
dbcc settrunc('ltm','ignore')
go


At this point you then use rs_init to add 'new_db' as a a new database/connection to the desired PRS.

NOTE: If 'new_db' is to be the active db in a WS setup, make sure the logical connection has been created before running rs_init.

Once you've added 'new_db' to the replication domain you'll need to continue with normal replication setup, eg:


make sure RDB(s) is added to the replication domain (if not already a member)
add route(s) to RRS (as needed)
setup repdefs/subs
assign any custom/modified classes to the DSI connections