Shaping with Burst up to interface speed

#1

This topic is to discuss the following lesson:

#2

Thanks a lot Rene. Excellent post !!!

#3

Thanks for this clear and concise lesson, much appreciated

#4

3.200 50ms: How did you get the 3.200?
Thanks.

#5

Hi Paul,

In my example, the Tc of 50 ms is a requirement.

The bottom link has a CIR of 64kbps, that’s 64000 bits per second (1000ms).

64000 bits = 1000ms

Divide it by 10 and we get:

6400 bits = 100ms

To get to 50ms, divide it by 2:

3200 bits = 50 ms.

Rene

#6

Hi, Rene

What do you mean the physical access rate? For me it is not clear, could give an explanation on this?

#7

Hello Stefanio.

When Rene refers to the physical access rate, he is referring to the maximum speed available on the physical interface. In this specific case:

Rene is referring to the maxiumum speed that the Serial interface S0/0 is capable of providing.

I hope this has been helpful!

Laz

#8

Hi Rene,

That was a great bunch of posts. Just for the benefit of students, can you please state this?

Bc and Be - are they supposed to be expressed in bits, bytes ? vary with different families/models of Cisco devices?

Thanks,
Ayyappan

#9

Hello Ayyappan

Looking at the below output of the context sensitive help, we can see that both Bc and Be are measured in bits:

image
image.png715×292 13.9 KB

This image is from the following lesson:

Now Rene doesn’t mention which platform or which IOS he is using, however, it should be the same for most platforms.

I hope this has been helpful!

Laz