How to create hs oracle to SQLSERVER with rac scan

Question

hi i am trying to create an hs for oracle rac for a course but i am unable to configure the hs

How to configure the listener with scan_listener? hs example:

odbc windows64 bits system dns:

odbcSQLSERVER

NOTE: db conexion using rac-scan configure in firewall "Untangle", disk share with "openfiler".

$GRID_HOME\network\admin\tnsnames.ora

SQLSERVERDB =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = rac-scan)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SID = SQLSERVERDB )
    )
  (HS=OK)
  )

$GRID_HOME\hs\admin\initSQLSERVERDB.ora

HS_FDS_CONNECT_INFO = odbcSQLSERVER
HS_FDS_TRACE_LEVEL = off

restart listener

lsnrctl stop
lsnrctl start

tnsping SQLSERVERDB

Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = )(PORT = )) (CONNECT_DATA = (SERVER = ) (SERVICE_NAME = )))
OK (10 msec)

I don't understand how to configure this part since it is remote_scan.

is configured or not?

$GRID_HOME\network\admin\listener.ora

REMOTE_LISTENER_SCAN1= ...
REMOTE_LISTENER_SCAN2 = ...
REMOTE_LISTENER_SCAN3 = ...

SID_LIST_REMOTE_LISTENER_SCAN=
  (SID_LIST=
      (SID_DESC=
         (SID_NAME=SQLSERVERDB)
         (ORACLE_HOME=C:\oracle\app\grid)
         (PROGRAM=DG4ODBC)
      )
  )

create dblink: SQS

query:

select * from dbtest.table1@SQS;

ERROR:

ORA-28545: error diagnosed by Net8 when connecting to an agent
Unable to retrieve text of NETWORK/NCR message 65535
ORA-02063: preceding 2 lines from SQS