This read-write INTEGER is relevant when the host parameter dhcp_client_active_on_start is TRUE, and a non-zero value signals that the DHCP client has been removed from configuration by the user on that interface, telling the application not to re-add it, while a zero value means the DHCP client entry must be added. An admin relies on this internal flag to prevent an interface from having its DHCP client automatically re-created after the admin deliberately removed it. For example, a non-zero value tied to a WAN interface's ifIndex tells the system not to silently re-enable DHCP on that interface after the admin removed it manually.