Serial Reports
Networking - Cisco

Serial Ports Be careful when configuring a serial interface. You should know a few things first. Usually a CSU/DSU device will be attached to the router to provide clocking for the line to the router. But sometimes a you must tell an interface what clocking to provide for a DCE device, by default all DTE devices have clocking already. Notice what we do with the following commands. Router#config t Enter configuration commands, one per line. End with CNTL/Z. Router(config)#in # #t s0 Router(config-if)#clock rate ? 

	Speed (bits per second)
1200
2400
4800
9600
19200
38400
56000
64000
72000
125000
148000
250000
500000
800000
1000000
1300000
2000000
4000000
<300-8000000>    Choose clockrate from list above

Router(config-if)#clock rate 64000

Also in this global configuration mode a user can enter the bandwidth that the interface is supposed to run at, make sure that you understand that the clock rate is in bits while the bandwidth is in kilobits. Router(config-if)#bandwidth ? 

<1-10000000>  Bandwidth in kilobits

Router(config-if)#bandwidth 96 Router(config-if)#^Z