*.db_name=oracl
*.db_unique_name=oracl
*.log_archive_config='dg_config=(oracl,oraclbak)'
*.log_archive_dest_1=
 'location=/u01/app/oracle/duplicate/ 
  valid_for=(all_logfiles,all_roles)
  db_unique_name=oracl'
*.log_archive_dest_2=
 'service=oraclbak async
  valid_for=(online_logfiles,primary_role) 
  db_unique_name=oraclbak'
*.log_archive_dest_state_1=enable
*.log_archive_dest_state_2=enable
*.remote_login_passwordfile=exclusive
*.log_archive_format=%t_%s_%r.arc
*.log_archive_max_processes=30
*.fal_server=dup_oracl
*.standby_file_management=auto

*.db_name=oracl
*.db_unique_name=oraclbak
*.log_archive_config='dg_config=(oracl,oraclbak)'
*.log_archive_format=log%t_%s_%r.arc
*.log_archive_dest_1=
 'location=/u01/app/oracle/duplicate/
  valid_for=(all_logfiles,all_roles) 
  db_unique_name=oraclbak'
*.log_archive_dest_2=
 'service=oracl async
  valid_for=(online_logfiles,primary_role) 
  db_unique_name=oracl'
*.log_archive_dest_state_1=enable
*.log_archive_dest_state_2=enable
*.remote_login_passwordfile=exclusive
*.standby_file_management=auto
*.fal_server=tar_oracl

# tnsnames.ora Network Configuration File: 
/u01/app/oracle/product/10.2.0/db_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.

TAR_ORACL =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.30.43)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = oracl)
    )
  )

DUP_ORACL =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.30.37)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = oraclbak)
    )
  )

*** 2012-02-15 08:01:24.611 60679 kcrr.c
Error 12170 received logging on to the standby
Error 12170 connecting to destination LOG_ARCHIVE_DEST_2 standby host 'oraclbak'
Error 12170 attaching to destination LOG_ARCHIVE_DEST_2 standby host 'oraclbak'
ORA-12170: TNS:Connect timeout occurred
*** 2012-02-15 08:01:24.625 58941 kcrr.c
kcrrfail: dest:2 err:12170 force:0 blast:1
kcrrwkx: unknown error:12170
ORA-16055: FAL request rejected
ARCH: Connecting to console port...
ARCH: Connecting to console port...
kcrrwkx: nothing to do (end)
*** 2012-02-15 08:03:14.537
kcrrwkx: nothing to do (start)
*** 2012-02-15 08:08:14.554
kcrrwkx: nothing to do (start)


kcrrwkx: nothing to do (start)
*** 2012-02-15 08:28:41.386
Redo shipping client performing standby login
*** 2012-02-15 08:31:50.650
OCIServerAttach failed -1
.. Detailed OCI error val is 12170 and errmsg is 'ORA-12170: TNS:Connect timeout occurred
'
*** 2012-02-15 08:31:50.663 60679 kcrr.c
Error 12170 received logging on to the standby
Error 12170 connecting to destination LOG_ARCHIVE_DEST_2 standby host 'oraclbak'
Error 12170 attaching to destination LOG_ARCHIVE_DEST_2 standby host 'oraclbak'
ORA-12170: TNS:Connect timeout occurred
*** 2012-02-15 08:31:50.678 60679 kcrr.c
PING[ARCq]: Heartbeat failed to connect to standby 'oraclbak'. Error is 12170.
*** 2012-02-15 08:31:50.680 58941 kcrr.c
kcrrfail: dest:2 err:12170 force:0 blast:1
kcrrwkx: nothing to do (end)

ORA-12170: TNS:Connect timeout occurred
 *Cause:  The server shut down because connection establishment or
 communication with a client failed to complete within the allotted time
 interval. This may be a result of network or system delays; or this may
 indicate that a malicious client is trying to cause a Denial of Service
 attack on the server.
 *Action: If the error occurred because of a slow network or system,
 reconfigure one or all of the parameters SQLNET.INBOUND_CONNECT_TIMEOUT,
 SQLNET.SEND_TIMEOUT, SQLNET.RECV_TIMEOUT in sqlnet.ora to larger values.
 If a malicious client is suspected, use the address in sqlnet.log to
 identify the source and restrict access. Note that logged addresses may
 not be reliable as they can be forged (e.g. in TCP/IP).

[oracle@hxl01 admin]$ more sqlnet.ora
# sqlnet.ora Network Configuration File: /u01/app/oracle/product/10.2.0/db_1/network/admin/sqlnet.ora
# Generated by Oracle configuration tools.

#SQLNET.AUTHENTICATION_SERVICES = (none)

[oracle@hxl admin]$ tnsping dup_oracl

TNS Ping Utility for Linux: Version 10.2.0.1.0 - Production on 15-FEB-2012 09:16:39

Copyright (c) 1997, 2005, Oracle.  All rights reserved.

Used parameter files:


Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.30.37)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = oraclbak)))
OK (80 msec)