RE: CBWFQ on Frame-Relay Interface

From: Edwards, Andrew M (andrew.m.edwards@boeing.com)
Date: Tue Oct 18 2005 - 14:24:48 GMT-3


Ryan,

When you use FRTS and CBWFQ with the bandwidth percentage parameter, the
percentage is based upon the minCIR value for FRTS.

HTH,

andy

-----Original Message-----
From: The Great Ryan [mailto:pv.ryan@gmail.com]
Sent: Tuesday, October 18, 2005 10:59 AM
To: Cisco certification
Subject: CBWFQ on Frame-Relay Interface

Hi, Group,

I want to classfiy two types of traffic and apply CBWFQ on 128k
Frame-Relay Interface. Does my configuration work on Frame-Relay
Interface?
The "show policy-map" seem ok

==========================
 class-map match-all traffic-a
  match access-group 15
 class-map match-all traffic-b
  match access-group 25
!
 policy-map QOS
  class traffic-a
   bandwidth percent 25
  class traffic-b
   bandwidth percent 50
!
interface Serial0/0
 bandwidth 128
 service-policy output QOS
 encapsulation frame-relay
!
R5#s policy-map interface s0/0

 Serial0/0

  Service-policy output: QOS

    Class-map: traffic-a (match-all)
      0 packets, 0 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: access-group 15
      Queueing
        Output Queue: Conversation 265
        Bandwidth 25 (%)
        Bandwidth 32 (kbps) Max Threshold 64 (packets)
        (pkts matched/bytes matched) 0/0
        (depth/total drops/no-buffer drops) 0/0/0

    Class-map: traffic-b (match-all)
      0 packets, 0 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: access-group 25
      Queueing
        Output Queue: Conversation 266
        Bandwidth 50 (%)
        Bandwidth 64 (kbps) Max Threshold 64 (packets)
        (pkts matched/bytes matched) 0/0
        (depth/total drops/no-buffer drops) 0/0/0

    Class-map: class-default (match-any)
      23 packets, 1243 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: any
==========================

However, if I try to use Frame-Relay Traffic shaping together with
"service policy output", the bandwidth percent seem to be not correct.
25% traffic become 16k only. Why it changes ?

==========================
 class-map match-all traffic-a
  match access-group 15
 class-map match-all traffic-b
  match access-group 25
!
 policy-map QOS
  class traffic-a
   bandwidth percent 25
  class traffic-b
   bandwidth percent 50
!
interface Serial0/0
 encapsulation frame-relay
 frame-relay class FRTS
 frame-relay traffic-shaping
!
map-class frame-relay FRTS
 frame-relay cir 128000
 service-policy output QOS
!
R5#show policy-map int s0/0 dlci 503
 Serial0/0: DLCI 503 -

  Service-policy output: QOS

    Class-map: traffic-a (match-all)
      0 packets, 0 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: access-group 15
      Queueing
        Output Queue: Conversation 25
        Bandwidth 25 (%)
        Bandwidth 16 (kbps) Max Threshold 64 (packets)
        (pkts matched/bytes matched) 0/0
        (depth/total drops/no-buffer drops) 0/0/0

    Class-map: traffic-b (match-all)
      0 packets, 0 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: access-group 25
      Queueing
        Output Queue: Conversation 26
        Bandwidth 50 (%)
        Bandwidth 32 (kbps) Max Threshold 64 (packets)
        (pkts matched/bytes matched) 0/0
        (depth/total drops/no-buffer drops) 0/0/0

    Class-map: class-default (match-any)
      0 packets, 0 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: any



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