Refer to the following document for PowerHA migration planning:
http://www-01.ibm.com/support/knowledgecenter/SSPHQG_7.1.0/com.ibm.powerha.insgd/ha_install_mig61_plan.htm

The tarball contains three separate epkgs, one each for CAA, RSCT, and PowerHA.
1. The CAA and RSCT epkgs should be installed prior to the PowerHA migration and require a reboot.  Because they both require a reboot, it is recommended to install both CAA and RSCT epkgs and then perform a single reboot (using shutdown -r).
2. The PowerHA epkg includes a fix to cluster manager and hence would require Cluster manager to be stopped and started. Hence to avoid additional downtime, it is recommended that this fix package be installed as part of the PowerHA migration procedure, immediately after upgrading to PowerHA SystemMirror 7.1.3 with Service Pack 3.

To install an epkg, enter:
emgr -e <epkg>

The epkgs contained in this tarball are:
MIG2_6195.150910.epkg.Z (CAA)
PHA2_7133.150813.epkg.Z (PowerHA)
rsctHA7a1.150911.epkg.Z (RSCT)