Cisco ASA Firmware Update on Failover Cluster

First we need to copy the firmware update and the ASDM on the Units. Please note these are not synced unlike the configuration. With savings via ASDM once again on the active to the passive IP and then upload it via browser, alternatively via CLI and tftp:

next boot we will use the new firmware:

Don’t forget to save!

Be sure to be on of the active ASA:

This host Primary Active.. nice!

Now, we restart the standby unit:

Wait until the replication of the config is done and move  the active role in the cluster to the standby unit(new firmware).

Then we restart the new standby unit(still old firmware), by connect us back on the active unit, and then

Thats all Folks!