1) NOT ALL COMPONENTS support changes in network.
2) Force Oracle runInstaller pick up appropriate ip/hostname by ‘runInstaller OUI_HOSTNAME=_what_my_hostname_’
Case:
oracle@mid.domainx.com:FRalone:/myapp/u04/oracle/fr/chgip/scripts > ./chgiphost.sh -mid
Oracle Home set to /myapp/u04/oracle/fr
Starting Change Hostname/IP…
Enter fully qualified hostname (hostname.domainname) of destination
(myhost)>>myapp.domainx.com
Enter fully qualified hostname (hostname.domainname) of source
(myhost)>>mid.domainx.com
Enter valid IP Address of destination
(100.100.100.12)>>
Enter valid IP Address of source
(100.100.100.11)>>
Change Hostname/IP completed successfully.
Tip: if you see help messasge , you get an idea why some component can’t be changed. :-p
oracle@mid.domainx.com:FRalone:/myapp/u04/oracle/fr/chgip/scripts > ./chgiphost.sh
Usage:
./chgiphost.sh [-version | -help | -mid [-silent] | -infra [-silent] | -idm [-silent]]
Where:
-version : Shows the version of the tool.
-infra : To change the IP of Infrastructure Home
-mid : To change the Hostname/IP of the Mid-tier Home
-idm : To change hostname/IP of IM-only Home
-silent : To run in silent mode
老庞闲话 
It’s difficult to find experienced people on this
subject, but you sound like you know what you’re
talking about! Thanks
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