LTM Ver 10 to 11 upgrade

You download hotfix and same as main image go to system/software-management/ but instead of clicking image-list, you click on Hotfix-list and to the right of availble images, click on import.. I upload hotfix first since its faster.. then the main image. Here is another awesome link from F5 for 10.x to 11.x upgrade. Go to part "Preparing BIG-IP active-standby systems for an upgrade". First part is for both units.. the 2nd part for standby and 3rd for active unit. Last note, when I go to system/software-management/image list or /hotfix list, the boot location for my 10.2.3 image is HD1.1 & for 11.2.0 is HD1.2 and 11.2.1 is HD1.3. This way, if I have any issues with 11.2.1, I can boot back from HD1.2 which is 11.2.0 image. You maybe going from 10.2.x to 11.2.1 and may have HD1.1 and HD1.2.. just make sure, you place the name image in a different boot location partition.

http://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/bigip-upgrade-active-standby-11-2-0/1.htmlunique_6436610