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• You cannot use a data-sharing interface for the failover link.

Default MAC Addresses

• MAC addresses for all interfaces are taken from a MAC address pool. For subinterfaces, if you decide

to manually configure MAC addresses, make sure you use unique MAC addresses for all subinterfaces

on the same parent interface to ensure proper classification. See Automatic MAC Addresses for Instance

Interfaces, on page 13.

Configure Instances

Before you configure instances, you need to enable multi-instance mode, add the chassis to the management

center, and configure chassis interfaces. You can also customize the chassis settings.

Enable Multi-Instance Mode

You need to connect to the threat defense CLI at the console port to enable multi-instance mode. After you

configure the mode, you can add it to the management center.

Although you can connect to SSH on the management port, we recommend using the console port to avoid

multiple disconnections. This procedure covers the console port.

Note

Procedure

Step 1 Connect to the chassis console port.

The console port connects to the FXOS CLI.

Step 2 Log in with the username admin and the password Admin123.

The first time you log in to FXOS, you are prompted to change the password.

If the password was already changed, and you do not know it, you must reimage the device to

reset the password to the default. See the FXOS troubleshooting guide for the reimage procedure.

Note

Example:

firepower login: admin

Password: Admin123

Successful login attempts for user 'admin' : 1

[...]

Hello admin. You must change your password.

Enter new password: ********

Confirm new password: ********

Your password was updated successfully.

[...]

Multi-Instance Mode for the Secure Firewall 3100

Configure Instances

Cisco Secure Firewall 3100 User Manual

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