OUTPUT-101 : Frame-Relay Traffic Shaping

December 24, 2009

Often knowing the necessary show commands is not enough, you need to understand the output.
Here is a good example and breakdown of each of the fields with the command:

show traffic-shape

 VC                      = 'DLCI's'
 Access List             = 'Used to shape traffic of common type for separation'
 Target Rate             = 'CIR in bits'
 Byte-Limit              = 'Bc+Be ie the size the token bucket, express in BYTES'
 Sustain bits/int        = 'Bc value per Tc, (int is short for interval or Tc)'
 Excess bits/int         = 'Be value'
 Interval (ms)           = 'Tc value'
 Increment (bytes)       = 'How many bytes of token replenished each Tc, ie Bc value in bytes'
 Adapt Active            = 'Shows Adaptive shaping has been enabled. If a BECN is received, the flow is throttled back'

What else can be set about the configuration here?
The interface have 3 DLCI’s defined.
DLCI’s 413 and 405 have a CIR of 56k. This was not configured. This is default behaviour. When ‘frame-relay traffic-shaping’ is enabled each DLCI on that interface will be allocated a 56k CIR unless changed. Here it is clear that DLCI 403 has a map-class policy applied.

Oh and Merry Christmas guys :D


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