Database Software

Hi

I got following issue with changing IP address for 2 node RAC database

please refer below link(for changing IP address)
http://zhefeng.wordpress.com/2009/02/02/change-ip-address-for-oracle-rac-public-and-vip-interfaces/

I was unable to start some services after the following changes.

./crs_stat -t
Name Type Target State Host
________________________________________
ora....st1.srv application ONLINE OFFLINE
ora....st2.srv application ONLINE OFFLINE
ora.....com.cs application ONLINE OFFLINE

The service add, start did not work either.

I was unable to start the other node.

I followed same steps
http://zhefeng.wordpress.com/2009/02/02/change-ip-address-for-oracle-rac-public-and-vip-interfaces/
http://www.db-nemec.com/RAC_IP_Change.html

but I was unable to start following services

root@xxyy bin# ./crs_stat -t
Name Type Target State Host
________________________________________
ora....st1.srv application ONLINE OFFLINE
ora....st2.srv application ONLINE OFFLINE
ora.....com.cs application ONLINE OFFLINE

Any attempt to bring up the services is greeted by this:
root@xxyy bin# ./srvctl start service -d xx
PRKP-1030 : Failed to start the service xxx_srv1.xxxx.com.
CRS-1006: No more members to consider
CRS-0215: Could not start resource 'ora.xx.xxx_srv1.xxxx.com.cs'.

One more Important thing- The DR which is common for both Prod RAC DB and Stage RAC DB, has IP which needs to be changed aswell.
So the IP's which needs to be changed are
--Stage RAC DB node1, node2 and DR.

I am worried this would lead some problem for Prod RAC DB.
Could anyone let me how can it be done without any Downtime for Prod RAC DB.(chaning IP for the DR aswell)

-Help
Thanks
-Reddy