Frame relay voice adaptive traffic shaping

Posted: August 19, 2006 by cciestudy in QOS, WAN

** You will need to disable frame relay traffic shaping at the main interface level for this to work **

Configure LLQ for voice 

policy-map BR2-HQ
class RTP
priority percent 33
class Sig
bandwidth percent 2
class class-default
Configure Voice activated FRTS:

policy-map VATS  ———–  Line rate is 768kbps, CIR is 384kbps. Use 95 % of CIR for shape average and shape adaptive.
class class-default
shape average 729600 3648 0 
shape adaptive 364800
shape fr-voice-adapt deactivation 50
service-policy BR2-HQ
Configure FRTS class-map and apply VATS policy to the class-map

map-class frame-relay BR2-HQ
frame-relay fragment 480  ——— configures end-to-end FRF.12 fragmentation based on CIR of 384kbps
service-policy output VATS

interface Serial0/0
no ip address
encapsulation frame-relay
no dce-terminal-timing-enable
frame-relay fragmentation voice-adaptive deactivation 50
interface Serial0/0.201 point-to-point
ip address
frame-relay interface-dlci 201
class BR2-HQ

  1. Ted says:

    The command “shape average 729600 3648 0” doesn’t appear correct. According to Cisco command guide:
    shape {average | peak} cir [bc] [be]

    729600 is the pipe speed, rather than cir. So does 3684.

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