What command allows you to connect to the CLI of any device in the HA pair?

The command that allows you to connect to the CLI of any device in a High Availability (HA) pair is the one that specifies an HA unit index and an administrative username. This command is specifically designed for managing HA configurations and allows the administrator to access the command line interface of a specific device within the HA setup.

When executing this command, you provide the index of the HA unit you want to manage, typically indicated as '0' for the primary unit and '1' for the secondary unit. This direct access is crucial for performing administrative tasks, troubleshooting, or making configuration changes on the designated unit. This capability is essential in HA configurations, as it ensures that an administrator can interact with both devices and maintain optimal network functionality.

The focus on connecting to a specific device in an HA pair highlights the unique structures of such configurations, where multiple firewalls operate in tandem to ensure redundancy and reliability. The corresponding command facilitates necessary management tasks that one may carry out without disrupting the overall system while maintaining high availability.