How to change the VIP for RAC apps database tier and VIP for the Apps tier

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Problem:

How to change the VIP for RAC apps database tier and VIP for the Apps tier

Symptoms:

Database -- RAC instance (Two Instances).
Application -- Two node with shared APPL_TOP.

Solution:

- on the Database tier update the Auto Config Context variable s_virtual_hostname with the new vip hostname

- deregister the host or purge the Net Services Topology Data Model as per Note 218089.1 so the new virtual host to get reflected in tnsnames.ora in 8.0.6 ORACLE_HOME

backup FND_Nodes table.

deregister the current database tier from the Net Services Topology Data Model using

            perl <RDBMS ORACLE_HOME>/appsutil/bin/adgentns.pl appspass=<APPSpwd> \
contextfile=<CONTEXT> -removeserver

- run Auto Config on the Database tier
- run Auto Config on the Applications tier

References:

You might have to deregister the host or purge the Net Services Topology Data Model? as per Note 218089.1: "Autoconfig FAQ"

    

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