Hotfix install

Question

I haven't done any image upgrade on F5 devices and can't seem to find an answer. I am installing HF2 for version 12.1.2 on an HA pair of LTMs. Is there a need to enable the "Force Offline" on the standby unit which I am doing first? 
Much appreciated.&nbsp;

niels_van_sluis · Answer

Yes, it’s good practice to force offline the unit you are about to upgrade. From 11.1.0 and higher, the force offline will persist after a reboot. It will prevent the unit to handle traffic, until you release it again. For more info see:&nbsp;
https://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/bigip-11x-software-upgrade-11-5-0/1.html&nbsp;
https://support.f5.com/csp/article/K15122&nbsp;

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