Using the Oracle Toolkit in a HP Serviceguard Cluster README Revision: B.06.00, August 2010

/etc/hosts would contain names of services (database servers) in
addition to real physical hostnames. From Serviceguard's point of
view, these are relocatable hostnames.
EXAMPLE:
Assume a Serviceguard package for the Oracle instance ORACLE_TEST0,
is assigned the IP address 192.10.10.1
Add the following entry to your hosts files:
192.10.10.1 ORACLE_TEST0
The 'ORACLE_TEST0' instance should now be reachable using the name
'ORACLE_TEST0' regardless of the node on which it is running.
- listener:
Set up one listener process for each Oracle instance that executes
on a Serviceguard cluster, making sure that the listener can move
with the instance to another node. Effectively, ensure the
listener configured to a specific Oracle instance is assigned to a
unique port.
In the current release you can configure ONE listener to be
monitored by the toolkit.
However you can configure multiple listeners for the Oracle
instance outside the Serviceguard environment to provide more
HA to the listener.
NOTE:
It is recommended to use encrypted passwords for password protected
listeners.
The password specified for a listener in the parameter
PASSWORDS_<listener_name> in the file LISTENER.ORA, must be copied
to the LISTENER_PASS parameter in the haoracle.conf file. If there
are multiple passwords configured for a single listener, you can
use any one of them for the LISTENER_PASS parameter in the
haoracle.conf.
In particular, for Oracle 10g and 11g, there is a new listener
feature
called "Local OS Authentication" activated by default, which permits
the user who started the listener to administer the listener without
requiring password authentication. To disable this feature, you need
to specify "LOCAL_OS_AUTHENTICATION_listener_name = OFF" in
LISTENER.ORA. Please note, in this situation, due to a change in
Oracle 10g, you will have to specify the plain text password for the
LISTENER_PASS parameter in haoracle.conf (and not the encrypted
password found in LISTENER.ORA).