Byte Limit is going to be the maximum per interval, so BC + BE (in
Bytes, not Bits). Increment is just going to be your BC in bytes.

This link might help clear your doubts:

http://www.cisco.com/en/US/tech/tk713/tk237/technologies_tech_note09186a0080093c06.shtml

-Marc

On Fri, Jul 8, 2011 at 5:27 AM, Alef <[email protected]> wrote:
> do sh traffic-shape
>
> VC   Access Target    Byte   Sustain    Excess    Interval    Increment    
> Adapt
> -       List        Rate       Limit  bits/int      bits/int      (ms)        
>  (bytes)          Active
>                       128000 1984  7936        7936        62             992 
>               BECN
>
> We have set the rate at 128000. TC=BC/CIR so 7936 /128000=00.62, which is 
> 1/16th of a second. This means we send 128000/16=8000 bits per TC or 1000 
> bytes. The byte limit is double the sustain (Bc) and excess bits (Be) in 
> bytes, 15872. If we would want to increase the amount of bits sent, we would 
> need to decrease the time interval. So
>
> traffic-shape rate 128000 15872
>
> would increase the Bc and double it and resulting in a lower time interval 
> (15872/128000=00.124).
>
> My question is, what does the Byte Limit refer to? Because the byte limit is 
> (1984*8) 15872, about 16000 bits, not 8000.
>
> The funny thing is, if i divide by the default Tc 1/8th of a second, 
> 128000/8=16000bits ps, then i do get (16000/8) 2000 bytes or, 16000 bits. 
> Which is the value listed in the above output under byte limit. Am i missing 
> something here?
>
> And why is it double the Bc and Be?
> What does Increment mean? I am trying to figure out the numbers here but i 
> feel i am making some mistake in here.
>
> Any help would be appreciated.
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