SAP ASE uses the sql.ini file to determine the address at which to listen for clients.
Finds the value of the DSLISTEN environment variable.
Looks in the sql.ini file for an entry that matches the specified server name.
Looks in the libtcl.cfg file for an entry that matches the Net-Library driver name associated with the server entry in the sql.ini file.
Loads the specified Net-Library driver.
Uses the information from the MASTER entry in the sql.ini file to determine the address at which to listen for client connection requests.