Is LISTENER_ hostname mandatory for failover?

Oracle Version:10.2.0.4, 11gR2
Platform : Solaris 5.10
Isn't the default listener (LISTENER) enough for enabling failovers within RAC nodes. I've been told that,on eache node, you must create non-deafault listeners with the naming convention
LISTENER_<hostname>to enable failovers between nodes. Is it true?

In pre 11g, when you install Oracle Clusterware, Oracle by default create listener LISTENER_hostname. I don;t think there is a specific requirement to use this naming convention. The important thing is that your database parameters LOCAL_LISTENER , REMOTE_LISTENER are set correctly so that PMON processes of database instances are aware of database services running on each database instance.
Regarding 11g, Oracle use SCAN and local listener both and you may find end points that listener is listening on, in the listener.ora file. Please refer http://www.oracle.com/technetwork/database/clustering/overview/scan-129069.pdf
Regards
Harish Kumar
http://www.oraxperts.com

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SQL*Plus: Release 11.2.0.3.0 Production on Fri Apr 20 17:11:19 2012
Copyright (c) 1982, 2011, Oracle. All rights reserved.
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SQL*Plus: Release 11.1.0.6.0 - Production on Tue Apr 24 10:12:31 2012
Copyright (c) 1982, 2007, Oracle. All rights reserved.
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SQL*Plus: Release 11.1.0.6.0 - Production on Tue Apr 24 10:14:30 2012
Copyright (c) 1982, 2007, Oracle. All rights reserved.
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