From: Rich Collins (nilsi2002@gmail.com)
Date: Tue Aug 05 2008 - 16:10:41 ART
That wording "throughput" does get confusing.
I did a quick search on the Cisco web site and found the exact same wording:
http://www.cisco.com/en/US/docs/ios/12_2/qos/command/reference/qrfcmd9.pdf
Page: QR-240
.....
Examples The following example sets the uses average rate shaping to ensure
a bandwidth of 256 kbps:
shape average 256000
The following example uses peak rate shaping to ensure a bandwidth of 300
kbps but allow throughput
up to 512 kbps if enough bandwidth is available on the interface:
bandwidth 300
shape peak 512000
....
-Rich
On Tue, Aug 5, 2008 at 1:02 PM, akyccie <akyccie@gmail.com> wrote:
> But the question specially asked "throughput up to the peak of 512" so it
> means you have define the "shape peak" otherwise it can go beyound 512kbps.
>
>
> ----- Original Message ----- From: "Scott Strobeck" <scott@strobeck.net>
> To: "Hobbs" <deadheadblues@gmail.com>
> Cc: "Ahsan Mohiuddin" <ahsan.mohiuddin@gmail.com>; "Cisco certification" <
> ccielab@groupstudy.com>
> Sent: Tuesday, August 05, 2008 9:39 PM
> Subject: Re: Shaping/Queuing Confusion
>
>
> I think you almost nailed it, Hobbs. The way I read it is that the
>> Prec4 class doesn't require shaping. I think this would do it:
>>
>> policy-map policy
>> class fa0/0
>> bandwidth 128
>> shape average 256000
>> class prec4
>> bandwidth 384
>>
>> The bandwidth statement is a minimum guarantee, but will allow the
>> traffic to go up to the full bandwidth, if it is available.
>>
>> Scott
>>
>> Hobbs wrote:
>>
>> I did it like this and it works:
>>
>> policy-map policy
>> class fa0/0
>> bandwidth 128
>> shape average 256000
>> class prec4
>> bandwidth 384
>> shape peak 512000
>>
>> Does that satisfy the requirements?
>>
>> Not sure why you are using nested policies...
>>
>> On Tue, Aug 5, 2008 at 3:09 AM, Ahsan Mohiuddin <
>> ahsan.mohiuddin@gmail.com> wrote:
>>
>> Dear Experts,
>>
>> I am confused what would be the solution to below requirements. Please
>> help!
>>
>> Define two classes of service besides the default.
>>
>> Class Fa0/0 matches all the traffic coming from input interface fa0/0.
>>
>> Class IP-Prec matches all the traffic with an IP Precedence of 4.
>>
>> Class Fa0/0 is ensured a bandwidth of 128 Kbps and the output is shaped
>> to
>> 256 Kbps.
>>
>> Class IP-Prec is ensured a bandwidth of 384 Kbps. But if enough
>> bandwidth
>> is available, the class can obtain the throughput up to the peak of 512
>> Kbps
>>
>> I tried the following configuration but when I apply it to interface, I
>> get
>> *"GTS : Can be enabled only at the first level"*
>>
>> Class Map match-all Fa0/0 (id 1)
>> Match input-interface FastEthernet0/0
>>
>> Class Map match-all IP-Prec (id 2)
>> Match ip precedence 4
>>
>> Policy Map Fa0/0
>> Class Fa0/0
>> Traffic Shaping
>> Average Rate Traffic Shaping
>> CIR 256000 (bps) Max. Buffers Limit 1000 (Packets)
>> Policy Map IP-Prec
>> Class IP-Prec
>> Traffic Shaping
>> Peak Rate Traffic Shaping
>> CIR 512000 (bps) Max. Buffers Limit 1000 (Packets)
>> Policy Map SHAPE
>> Class Fa0/0
>> Bandwidth 128 (kbps) Max Threshold 64 (packets)
>> service-policy Fa0/0
>> Class IP-Prec
>> Bandwidth 384 (kbps) Max Threshold 64 (packets)
>> service-policy IP-Prec
>>
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