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At the time of FTD HA creation, the device list does not list the devices that are supposed to be added as HA pair. FMC pigtail shows the INFO level log, MOJO: 01-09 02:56:22 [.20657] [18695] [info] device version is not supported for RBD HA formation. at /usr/local/sf/lib/perl/5.32.1/SF/SensorList.pm line 1487.
- FTD managed via FMC - FTD version below 7.4 (e.g. 7.3, 7.3.1.1) - FTD management access via data interface
Manage threat defense high availability pairs using a data interface. Minimum FMC and FTD version required is 7.4.0 Refer - https://www.cisco.com/c/en/us/td/docs/security/secure-firewall/release-notes/threat-defense/740/threat-defense-release-notes-74/features.html
In such an event, FMC should be able to point out that FTD that use data interfaces for management access and that have less than 7.4 of their version will not have the ability to create FTD HA.
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