RMAN Connection to Auxiliary Database Fails with ORA-12641 during physical standby configuration

While connecting to Auxiliary Database for duplicating database for standby, it fails with below error



rman target sys/****@PROD1 auxiliary sys/****@STBY

Recovery Manager: Release 11.2.0.3.0 - Production on Thu Mar 27 05:12:56 2014

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

connected to target database: PROD1 (DBID=1892954352)
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00554: initialization of internal recovery manager package failed
RMAN-04006: error from auxiliary database: ORA-12641: Authentication service failed to initialize

Reason:

SQLNET.AUTHENTICATION_SERVICES is set to "ALL" in sqlnet.ora file.

Solution:

set SQLNET.AUTHENTICATION_SERVICES to "NONE" in sqlnet.ora file on standby server and then check.

[oracle@ora-stage-sangam-d1 admin]$ rman target sys/****@PROD1 auxiliary sys/****@STBY

Recovery Manager: Release 11.2.0.3.0 - Production on Thu Mar 27 05:31:13 2014

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

connected to target database: PROD1 (DBID=1892954352)
connected to auxiliary database: PROD1 (not mounted)

RMAN>