修改Net Manager 对应的文件 tnsnames.ora

oraclehome\network\ADMIN\tnsnames.ora


dbservicename =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.30.2.204)(PORT = 1527))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = DBSID)
    )
  )