From: Sean C (Upp_and_Upp@hotmail.com)
Date: Fri May 06 2005 - 14:56:32 GMT-3
James,
Like others wrote, available bandwidth defaults to 75% of the configured
bandwidth.
Quickly becoming one of my favorite 'show' commands: show queue s0/0 | i
Available
If the serial is set to default BW of 1544:
R3#sh queue s0/0 | i Available
Available Bandwidth 1158 kilobits/sec
R3#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R3(config)#int ser 0/0
R3(config-if)#max-reserved-bandwidth 100
R3(config-if)#end
R3#sh queue s0/0 | i Available
Available Bandwidth 1544 kilobits/sec
R3#conf t
R3(config)#int ser 0/0
R3(config-if)#default max-reserved-bandwidth
R3(config-if)#end
R3#sh int ser
R3#sh queue s0/0 | i Available
Available Bandwidth 1158 kilobits/sec
R3#conf t
R3(config)#int s 0/0
R3(config-if)#band 128
R3(config-if)#end
R3#sh queue s0/0 | i Available
Available Bandwidth 96 kilobits/sec <-- 128 kbps x 75%
R3#conf t
R3(config)#int ser 0/0
R3(config-if)#max-reserved-bandwidth 100
R3(config-if)#end
R3#sh queue s0/0 | i Available
Available Bandwidth 128 kilobits/sec
HTH,
Sean
----- Original Message -----
From: "James Matrisciano" <jmatrisciano@kenttech.com>
To: <ccielab@groupstudy.com>
Sent: Friday, May 06, 2005 11:13 AM
Subject: QoS question
> When I build a CBWFQ policy....such as this:
>
> class-map match-all qos1
> match access-group name qos1
> class-map match-all qos2
> match access-group name qos2
> !
> !
> policy-map qos
> class qos1
> bandwidth percent 15
> class qos2
> bandwidth percent 30
> class class-default
> bandwidth percent 45
> !
>
>
> Why do I get the following after applying it to a serial interface:
>
> Router(config-if)#service-policy out qos
> I/f Serial0/0 class class-default requested bandwidth 45%, available
> only 30%
>
> Tought that it allotted for the over head....how much do I have to take
> off the top, and to get those percentages, do I use a bandwidth (no
> percentage) statement and what is the base line of bandwidth I start
> subtracting from?
>
>
> Router#sh int s0/0
> Serial0/0 is up, line protocol is up
> Hardware is PowerQUICC Serial
> Internet address is 1.1.1.1/24
> MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
>
>
> Look forward to any responses, thanks!
>
> jm
>
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