In addition to Andrew's suggestion - I guess you are planning to add the unit first time (not replacing any failed stdby unit). In this scenario, I suggest you schedule a maintenance window as you need to add the standby ip + failover configuration on primary (current ASA). Once that is done, adding standby unit is very easy.Check the below link for more information.
Login to the FXOS chassis manager.
Direct your browser to https://hostname/, and log-in using the user-name and password.
Go to Help > About and check the current version:
Check the current version availa...
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...