The Cisco StackWise-480 technology is based on the highly successful, industry-leading StackWise technology, which represents a high-quality stacking architecture. StackWise-480 features a stacking bandwidth of 480 Gbps. StackWise-480 utilizes Cisco IOS Software SSO to ensure resilience within the stack. The stack operates as a single switching unit managed by an active switch chosen from the member switches. The active switch automatically selects a standby switch within the stack. The active switch creates and updates all switching, routing, and wireless information, continuously synchronizing this information with the standby switch. If the active switch fails, the standby switch takes on the role of the active switch, ensuring that the stack remains operational. Access points remain connected during a switch from the active to the standby switch. A functioning stack can add new members or remove old ones without service interruption. StackWise-480 creates a highly resilient, unified system of up to four switches and enables simplified management through a single IP address, a single Telnet session, a single CLI, automatic version checking, automatic upgrades, automatic configuration, and more. StackWise-480 also allows for local switching in Cisco Catalyst 3850 Series Switches.