Difference between configuring clock rate and bandwidth commands - Clock Rate Vs Bandwidth

This article and the video below will clarify the confusion around using the clock rate command and bandwidth command.

Clock Rate is the actual speed of data transfer- physical speed of an interface, It is used usually by the service provider on the serial interface when the customer needs to connect two sites together.

Looking at the diagram above, to adjust the line speed of the link between site1 and site2 to 64kbps use the following command.

R(config)#int s0/0/0
R(Config-if)#clock rate 64000

Bandwidth is used to set the bandwidth of the interface used by QoS and routing protocols to select the best path. It doesn't affect the actual interface speed or line speed.

R(config)#int s0/0/0
R(Config-if)#bandwidth 64

To know how routing protocols such as ospf and eigrp use bandwidth, read the following articles

http://netsyshorizon.blogspot.com/2015/02/by-default-ospf-cost-calculationis.html
http://netsyshorizon.blogspot.com/2015/02/eigrp-metric-calculation_25.html

For more details and explanation , watch this video on youtube
YouTube - Clock rate Vs Bandwidth

http://youtu.be/rntsm5bHagI

To download the video from mediafire

Mediafire - Clock rate Vs Bandwidth

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