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Appendix A
Introduction to the Cisco IOS: Hands-on Labs
38400
56000
64000
72000
125000
148000
250000
500000
800000
1000000
1300000
2000000
4000000
<300-4000000> Choose clockrate from list above
Router(config-if)#clock rate 64000
%Error: This command applies only to DCE interfaces
Router(config-if)#int s1
Router(config-if)#clock rate 64000
It does not hurt anything to try and put a clock rate on an interface.
Notice that the clock rate command is in bits per second.
2.
The next command you need to understand is the bandwidth com-
mand. Every Cisco router ships with a default serial link bandwidth
of T-1, or 1.544Mbps. However, understand that this has nothing to
do with how data is transferred over a link. The bandwidth of a
serial link is used by routing protocols such as IGRP, EIGRP, and
OSPF to calculate the best cost to a remote network. If you are using
RIP routing, for example, the bandwidth setting of a serial link is
irrelevant.
Router(config-if)#bandwidth ?
<1-10000000> Bandwidth in kilobits
Router(config-if)#bandwidth 64
Notice that unlike the clock rate command, the bandwidth
command is configured in kilobits.
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