ABSTRACT

The information presented in this chapter will give you a better understanding of the types of high-speed LAN/WAN interfaces supported on Cisco routers. Cisco routers support two types of high-speed LAN/WAN interfaces: physical and virtual interfaces. The physical types of interfaces you have depend on the appliques or interface processors you have. The virtual interfaces Cisco routers support include subinterfaces and Internet Protocol (IP) tunnels. Cisco routers support the following types of high-speed LAN/WAN interfaces: asynchronous serial; Asynchronous Transfer Mode (ATM); channelized E1 and T1; Ethernet; Fiber Distributed Data Interface (FDDI); High-Speed Serial Interface (HSSI); Integrated Services Digital Network (ISDN) Basic Rate Interface (BRI), MultiBasic Rate Interface (MBRI), and Primary Rate Interface (PRI); LAN Extender; loopback; null; synchronous serial; Token Ring; and tunnel. In addition to the high-speed LAN/WAN interface types, the router supports subinterfaces.