From: Bob Sinclair (bsinclair@netmasterclass.net)
Date: Mon Apr 12 2004 - 16:04:39 GMT-3
There are lots of mistakes in the Solie book, but I don't think this is one
of them. He points out that CBWFQ can only reserve up to 75% of link
bandwidth by default. That is true. Though mileage may vary on different
IOS versions, when I try to reserve 80% I get the following message
((C2600-JK8O3S-M), Version 12.2(4)T7).
R3(config-if)#service-policy output policy1
I/f Serial0/0 class class1 requested bandwidth 1235 (kbps) Available only
1158 (kbps)
R3(config-if)#
You can change this behavior with the max-reserved-bandwidth command, as
Solie points out on page 467. Could it be a bug in your version?
HTH,
Bob Sinclair
CCIE #10427, CISSP, MCSE
www.netmasterclass.net
----- Original Message -----
From: <gladston@br.ibm.com>
To: <ccielab@groupstudy.com>
Sent: Monday, April 12, 2004 1:27 PM
Subject: Bandwidth Available
> 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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