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tbf peak rate?



Hello~~~

If I use 2 token buckets to emulate TSpec's 
avg rate and peak rate(RFC 2212), how to set tbf2 's bucket size?

If tbf2 can gather tokens , then sometimes it will
generate an flow whose rate is larger than peak rate.
Can I set bucket size to zero to make it a leaky bucket?


  flow -> tbf1 -> tbf2 -> flow
       
   tbf1 bucket rate = avg rate
   tbf2 bucket rate = peak rate
        bucket size?


                   Jay...