You can download ise-appbundle-22.214.171.124.i386.tar.gz to upgrade to 1.1.3 and the apply the latest patch for 1.1.3 (patch 8).
Or you can apply the latest patch to your version 1.1.1 (patch 7) and then use this file ise-upgradebundle-1.1.x-to-126.96.36.1999.i386.tar.gz to upgrade to 1.2 directly.
First, you have to have an FTP server (easiest to configure) and then configure a repository on the ISE. the easiest way is therough the WebGUI by going to Administration > Maintenance and clicking on Repository on the left side menu.
Click Add. Fill out the configuration for the FTP Server and click Submit.
Then go to Administration > Backup & Restore and be sure to perform at least a Configuration Backup.
Log in to the CLI in enable mode.
Enter this command:
application upgrade ise-upgradebundle-1.1.x-to-188.8.131.529.i386.tar.gz <> (this is the name you set up for the repository created above)
Your ISE WILL reboot.
Once this is complete, log back in to the WebGUI and verify the install. You can then go to Administration > Maintenance and choose Patch Management from the left menu to upload and install Patch 3 to the v1.2 install.
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