MQC-only FR traffic shaping & CBWFQ

From: Ben (bmunyao@gmail.com)
Date: Thu Sep 20 2007 - 08:01:00 ART


Hi Everyone,

I would like your assistance or input with the following QOS scenario

The scenario: R5 has a point to point FR subinterface to R1, and a point
subinterface to R3, R4. Access rate at R1, R3 and R5 are 64Kbps, 64Kbps and
T1 respectively. Each DLCI is provisioned with a CIR of 56Kbps.

The task: Configure MQC-only traffic shaping at CIR for the R5-R1 and R5-R3
PVCs at CIR target rate, with excess burst to AR. Configure CBWFQ for the
R5-R3 PVC with voice traffic limited to 32Kbps and a burst of 4000bytes in a
second.

          P2P
           -------------------R1
         /
R5---< FR
         \
           ------------------R3,R4
         P2MP

My solution at R5:
R5
class-map VOICE
 match ip rtp 16384 16383
class-map FR_PVC_503
 match fr-dlci 503
class-map FR_PVC_504
 match fr-dlci 504

policy-map CBWFQ
 class VOICE
  priority 32 4000
policy-map SHAPE
 class FR_PVC_503
  shape average 56000 7000 1000
  service-policy CBWFQ
 class FR_PVC_504
  shape average 56000 7000 1000

int s1/0
  service out SHAPE
int s1/0.345 mult
  band 64
int s1/0.1 point
  band 64

Problem: When I verify shaping using "show policy-map int s1/0", and
generate some transit traffic to trigger shaping, my solution works fine.
How can I verify available bandwidth for the R5-R3 PVC, since I have CBWFQ
on that PVC? I tried using "show queueing int s1/0" without success.

TIA
Ben



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