Switch Virtual Interface for Cisco Integrated Services Routers

This paper provides an overview of the Switch Virtual Interface (SVI) for Cisco Integrated Services Routers. Cisco offers three types of integrated switching modules for the modular Cisco 3800, 2800, and 1800 Series Integrated Services Routers: the 16- and 36-port Cisco EtherSwitch modules, the Cisco EtherSwitch 4- and 9-port High-Speed WAN interface cards (HWICs), and the Cisco EtherSwitch service modules. In addition, the Cisco 1800 Series fixed-configuration Integrated Services Routers are integrated with an 8-port switch. The Cisco 870 and 850 Series Integrated Services Routers are integrated with a 4-port switch. The integrated switch ports for the fixed-configuration Integrated Services Routers and the switch ports on the HWICs do not natively support Layer 3 addresses or Layer 3 features.