Cisco Cisco Firepower Management Center 4000

If one of the Defense Centers in the high availability pair must be reimaged, disable the high availability 
link first. After you reimage the Defense Center, re-establish the high availability pair and the data 
synchronizes from the existing Defense Center to the newly added Defense Center. If a Defense Center 
cannot be reimaged (for example, the appliance has failed), contact Support.

Admin

Log into the Defense Center that you want to designate as the secondary Defense Center.

Select 

.

The Registration page appears.

Click 

.

The High Availability page appears.

Click the 

 option.

The Secondary Defense Center Setup page appears.

Type the hostname or IP address of the primary Defense Center in the 

text box.

Make sure you use hostnames rather than IP addresses if your network uses DHCP to assign IP 
addresses.

Note that you can leave the 

 field empty if the management host does not have a routable 

address. In that case, use both the 

 and the 

 fields.

Type a one-time-use registration key in the 

 text box 

Optionally, in the 

 field, type a unique alphanumeric registration ID that you want to use to 

identify the primary Defense Center. See 

 for more information.

Click 

.

A success message appears, and the Peer Manager page appears, showing the current state of the 
secondary Defense Center.

Using an account with Admin access, log into the Defense Center that you want to designate as the 
primary.

Select 

.

The Registration page appears.

Click 

.

The High Availability page appears.

Click the 

 option.

The Primary Defense Center Setup page appears.

Type the hostname or IP address of the secondary Defense Center in the 

 text box.

Make sure you use hostnames rather than IP addresses if your network uses DHCP to assign IP 
addresses.

Type the same one-time-use registration key in the 

 text box you used in step