ProductsFunctionMinimum VersionRequired?
Firepower 4100 or 9300 | Hardware platform to run the ASA | FXOS 1.1.2 | Required |
Firepower Chassis Manager | FXOS GUI device manager | Firepower Chassis Manager 1.1.2 | Optional; you can alternatively use the CLI |
ASA | Firewall application | ASA 9.4(1.152) | Required |
ASDM | ASA GUI device manager | ASDM 7.4(3) | Optional; you can alternatively use the CLI |
According to this table FMC is not required for ASA Cluster Solution, how can I set the CCL MTU 100 bytes higher than the DATA MTU?

and editing the mac address for the outside interface, if you can guide me how I should do it from the FX-OS cli?
I think this was not part of the FX-OS at all,
the way they stated these things on cisco https://www.cisco.com/c/en/us/td/docs/security/firepower/fxos/clustering/asa-cluster-solution.html
it's like you have to either do it on FMC or you can't!
It says if you're deploying FTD you need to open the FMC manager, and if you're deploying ASA you need to go here Configuration > Device Setup > Interface Settings > Interfaces
it hasn't even mentioned you need to open ASDM
I was lost in FCM to find this menu, and finally I realized oh it's ASDM, I don't even need ASDM for this, you just need to change it on ASA CLI
MTU Cluster 9100
and
under the spanned outside/inside portchannel
mac-address aaaa.aaaa.aabb
could you correct me if I am wrong?