Solved: frame transmission time and bandwidth command

sarahr202 · ‎03-23-2013

Hi everybody

Suppose our router is connected to fastethernet 100Mbs. If our wants to transmit a 1518 byte frame, it will take = 100 X 10Exp 6/ 1518x8 in sec

Suppose we change the bandwidth by using bandwidth command to 10Mbs. Will our router take 10EXP6/1518X8 in sec. ?

This is my understanding bandwidth command is used to manipulate the routing protocol metric. We can not change the transmission time like that.

So even if we configure ' bandwidth 10000 on our router, our will still consider the actual bandwidth of the interface when transmitting a frame.

Just want to verify that.

thanks and have a great weekend.

Steve Fuller · ‎03-24-2013

Hi,

That's exactly correct. The transmission rate of data on an interface is controlled by the physical interface speed and has nothing to do with the bandwidth command.

Peter explains this very eloquently in his response to a previous question on the subject at Bandwidth command in interface mode. The discussion in that post continues and gets a little deeper in terms of other subtle uses of the bandwidth command, but depending where you're at with your studies you may not want to worry too much about those points at this stage.

Regards

View solution in original post

Steve Fuller · ‎03-24-2013

Hi,

That's exactly correct. The transmission rate of data on an interface is controlled by the physical interface speed and has nothing to do with the bandwidth command.

Peter explains this very eloquently in his response to a previous question on the subject at Bandwidth command in interface mode. The discussion in that post continues and gets a little deeper in terms of other subtle uses of the bandwidth command, but depending where you're at with your studies you may not want to worry too much about those points at this stage.

Regards