Change Domain Name of Apps Tier for EBS R12

For a certification issue i had to change domain name of apps Tier with following steps.Firstly i have a unclear point that different domains of db Tier and apps Tier is compatible ? After below steps , i have examined there will be no problem.

Related steps

1. Deregister current App server

    As the applications domain name will be changed , app server need to be deregistered.
    perl $AD_TOP/bin/adgentns.pl appspass=<APPSpwd> contextfile=<CONTEXT> -removeserver

2. Change domain name of server

    Ensure that /etc/hosts shows new domain.

3. Recreate context file with new settings

    mv $INST_TOP/appl/admin/$CONTEXTFILE $INST_TOP/appl/admin/oldcontextfile.xml

    cd $INST_TOP/appl/admin
    perl $COMMON_TOP/clone/bin/adclonectx.pl contextfile=oldcontextfile.xml

    This step will create new context file with new app domain name.

4. Execute autoconfig

    $AD_TOP/bin/adconfig.sh contextfile=$INST_TOP/appl/admin/$CONTEXTFILE appspass=<password>

5. Check fnd_nodes.DOMAIN , fnd_nodes.WEBHOST and icx_parameters.SESSION_COOKIE_DOMAIN values to       ensure that show new domain name.

6. Start all application tier services with adstrtal.sh apps/<appspassword>