FTD - how to put a reimaged HA member back to the HA pair ?

[integration.cisco]

Hello,

Due to a "no space left on device" error, I reimaged an ASA that was part of an HA pair.

How can I put it back to my pair on the FMC (6.2.3) ?

There is no reset or reimport option available, and I couldn't find anything in the documentation.

Thanks.

[balaji.bandi]

Look at the replacement section :

https://www.cisco.com/c/en/us/td/docs/security/firepower/601/configuration/guide/fpmc-config-guide-v601/fpmc-config-guide-v601_chapter_01100110.pdf

Good referrence to understand :

https://www.cisco.com/c/en/us/support/docs/security/firepower-management-center/212699-configure-ftd-high-availability-on-firep.html

[Rahul Govindan]

I am in the process of doing the same with one of my customers using a 4100. This is the process I have understood so far:

1. Break the HA on FMC.
2. De-register/delete the secondary unit from FMC.
3. Power off and remove secondary Firepower device from rack after removing all network connections.
4. Replace the power supply, fan and SSD from old Firepower unit to new.
5. Rack the new unit and power on. Same management ip as old unit to be set via CLI.
6. Deploy FTD on new unit with the same interfaces and register with FMC.
7. Upgrade to same version and patch level as primary from FMC.
8. Add them both as HA pair on FMC.
9. Verify Failover functionality post change.