service definition for primary RAC cluster to RAC physical standby 19c

service definition for primary RAC cluster to RAC physical standby 19c

when defining a service in log_archive_dest on the a primary RAC cluster should you specify a service that connects to a specific instance of a RAC standby , or can you use a service that connects to any instance.

 i.e. which one of these is correct

STANDBY_SCAN =

 (DESCRIPTION =

  (ADDRESS = (PROTOCOL = TCP)(HOST = standby-scan.domain)(PORT = 1521))

  (CONNECT_DATA =

   (SERVER = DEDICATED)

   (SERVICE_NAME = standby.domain)

  )

 )

STANDBY_VIP =

 (DESCRIPTION =

  (ADDRESS = (PROTOCOL = TCP)(HOST = standby_HOST1-vip.domain)(PORT = 1521))

  (CONNECT_DATA =

   (SERVER = DEDICATED)

   (SERVICE_NAME = standby.domain)

   (INSTANCE_NAME = standby_1)