Bandwidth Available

From: gladston@br.ibm.com
Date: Mon Apr 12 2004 - 14:27:02 GMT-3


Hello,

Solies' book v.II, pag 467, says: "You can change the amount of bandwidth available for CBWFQ.". It says it is possible to configure up to 75% by default.

Studying this point I though it would be impossible to configure 4 class under policy map in the way the sum of the bandwidth was 80%. But when configuring, the router does not complain:

r1#sh policy-map interface ser 0/0 output

 Serial0/0

  Service-policy output: BANDWIDTH (1221)

    Class-map: P132 (match-all) (1223/2)
      0 packets, 0 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: access-group name P132 (1227)
      Weighted Fair Queueing
        Output Queue: Conversation 265
        Bandwidth 15 (%) Max Threshold 64 (packets)
        (pkts matched/bytes matched) 0/0
        (depth/total drops/no-buffer drops) 0/0/0

    Class-map: P162 (match-all) (1231/3)
      0 packets, 0 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: access-group name P162 (1235)
      Weighted Fair Queueing
        Output Queue: Conversation 266
        Bandwidth 30 (%) Max Threshold 64 (packets)
        (pkts matched/bytes matched) 0/0
        (depth/total drops/no-buffer drops) 0/0/0

    Class-map: VOICE (match-all) (1239/4)
      0 packets, 0 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: ip precedence 2 (1243)
      Weighted Fair Queueing
        Output Queue: Conversation 267
        Bandwidth 5 (%) Max Threshold 64 (packets)
        (pkts matched/bytes matched) 0/0
        (depth/total drops/no-buffer drops) 0/0/0

    Class-map: P10.20.65.6 (match-all) (1247/5)
      2512 packets, 3775248 bytes
      5 minute offered rate 57000 bps, drop rate 0 bps
      Match: access-group name P142-20.65.6 (1251)
      Weighted Fair Queueing
        Output Queue: Conversation 268
        Bandwidth 40 (%) Max Threshold 64 (packets)
        (pkts matched/bytes matched) 2517/3782768
        (depth/total drops/no-buffer drops) 0/0/0

    Class-map: class-default (match-any) (1255/0)
      2140 packets, 127523 bytes
      5 minute offered rate 1000 bps, drop rate 0 bps
      Match: any (1259)

Them I read http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fqos_r/qrfcmd1.htm#1029500
and it says you can configure up to 100%.

Is there a mistake on Solies' Book?



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