Serial interfaces will usually be attached to a CSU/DSU type of device that provides clocking for the line.īut if you have a back-to-back configuration (for example, one that’s used in a lab/classroom environment), on one end-the data communication equipment (DCE) end of the cable-must provide clocking. Remember interfaces are administratively shutdown by default so you will need to perform a “ no shutdown” for the interface to come up. ” starts the IP processing on the interface. To configure IP addresses on an interface, use the ip address command from interface configuration mode. Most of today’s routers are modular, the configuration would be “interface type slot/port” or “interface type module/slot/port”.Īn example of configuring a fastethernet interface with some possible options is as follows:Įven though you don’t have to use IP on your routers, it’s most often what people use. Some of the configurations used to configure an interface are Network layer addresses (IP Addresses), media type, bandwidth, and other administrator commands.ĭifferent routers use different methods to choose the interfaces used on them. The number, slot/number and module/slot/number are numbers used to uniquely identify an interface on different types of routers. The type of interface includes things such as serial, ethernet, fastethernet, gigabitethernet, atm, tunnel, loopback, etc. In this section you will learn how to configure interfaces on a Cisco router. Cisco CCNA Configuring Router Interfaces ( Chaoter 2 Contd)
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