This procedure requires a minimum of two nodes: Node 1 and Node 2.
Install Portal Server 7.2 on Node 1 on top of Application Server 9.1 with Access Manager and Directory Server.
Set SRA status to Enabled on Node 1.
PortalServer_base/SUNWportal/bin/psadmin switch-sra-status -u admin_user -f password_file on
Invoke Portal Server 7.2 GUI installer on Node 2 and select Gateway to install. This will also install Access Manager SDK.
Use the same password encryption key on both the nodes.
Provision profile on Node 1.
PortalServer_base/SUNWportal/bin/psadmin provision-sra -u admin_user -f password_file --gateway-profile gateway_profile -p portal-id --enable
Start Gateway on Node 2.
PortalServer_base/SUNWportal/bin/psadmin start-sra-instance -u admin-user-name -f password-file -N default -t gateway