Replace FTD 2120 with 2110 using fmc

[blsdits]

I currently have a cisco ftd 2120 that is managed by FMC, and I would like to replace it with a 2110, and then add a 2nd 2110 for HA.  I have added HA to FTD's in FMC before so that is not an issue, however I have not replaced a 2120 with a 2110 and have been having a hard time finding direct documentation for.  I am currently running 7.0.1 on my FMC and FTD.  Based on my research, here is what I believe I should do

1. Install 2110 FTD in rack and configure management interface

2. Add 2110 FTD to FMC, upgrade 2110 to same version as 2120 in FMC

3. Apply config from FMC to 2110 FTD

4. Configure interfaces on 2110 FTD

5. Disable 2120 FTD, and enable 2110 FTD interfaces to move traffic over

6. Once everything is confirmed working, remove 2120 FTD completely.

7. Add 2nd 2110 and configure HA(have documentation for this and have previously done this).

Is this the correct idea?  in some of my reading I have found people say that you need to backup and restore manually, not just deploy the same config to 2 different FTD's. 

Any help would be much appreciated.

David

[balaji.bandi · Accepted solution]

yes, high-level the steps are good for me and those are the correct steps, some times you may require clear ARP on the switches if they are not cleared (since you using the same IP address on the new FTD).