You cannot use the built-in chassis management SFP port for either FirePOWER logical deivce failover/state or management. That port is for chassis management only (FirePOWER Chassis manager and FX-OS cli shell).
Thus you will need to allocate an interface for each of those purposes. If does burn SFP+ slots and require 10 Gbps transceivers but that's how you have to do it on these platforms.
I usually specify the relatively inexpensive twinax cables for this (and for the connecitons to the switches as well). The SFP-H10GB-CU1M= (or 2M) is only US$100 list price and covers both ends of the connection. Contrast that with a SFP-10G-SR-S= fiber transceiver where you need two each plus a fiber jumper per connection.
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...