January 2001
Intermediate to advanced
368 pages
11h 35m
English
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Traffic Policing 43
Token bucket has three key parameters:
• Mean rate or Committed Information Rate (CIR), in bits per second—On
average, traffic does not exceed CIR.
• Conformed burst size (B
C
), in number of bytes—This is the amount of traffic
allowed to exceed the token bucket on an instantaneous basis. It is also occasionally
referred to as normal burst size.
• Extended burst size (B
E
), in number of bytes—This is the bonus round. It allows a
reduced percentage of traffic to conform between the conform burst and extended
burst.
A fourth relevant parameter, time interval (TI), depends on the mean rate and the B
C
, where
TI = B
C
÷ CIR.
Token bucket implementations ...
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