Re: Doubt in QoS

From: Anderson Mota Alves (mota_anderson@hotmail.com)
Date: Thu Jun 29 2006 - 09:32:53 ART


Thanks for all the comments on this, you are the best guys.

  --------------------------------------------------------------------

  From: "Petr Lapukhov" <petr@internetworkexpert.com>
  To: "Anderson Mota Alves" <mota_anderson@hotmail.com>,
  <ccielab@groupstudy.com>
  Subject: Re: Doubt in QoS
  Date: Thu, 29 Jun 2006 14:42:55 +0400
>The first one seems to be "almost" correct:
>
>You shape (limit) traffic up to 96kbit here - the only problem
>is "peak" keyword. This configuration actually permits you to send
>traffic up to 192kbit by default. So I would better do something
>like:
>
>...
>class CRITICAL
> shape average 96000
> bandwidth 84
>...
>
>This way you guarantee 84k in case of congestion,
>and limit flow up to 96k in any case.
>
>As for your second example - you can not mix priority and bandwidth:
>
>R6(config-pmap-c)#priority 64
>R6(config-pmap-c)#bandwidth 92
>Must remove priority configuration from this class first.
>
>Also remember that you cannot mix "priority" and "shape",
>and dont forget that "priority" actually police your traffic in
>case of congestion.
>
>Finally, you may choose "police" instead of "shape", with
>your first example. The decision should depend on task wording.
>
>HTH
>---
>Petr Lapukhov, CCIE #16379
>petr@internetworkexpert.com
>
>Internetwork Expert, Inc.
>http://www.InternetworkExpert.com
>Toll Free: 877-224-8987
>Outside US: 775-826-4344
>
>----- Original Message ----- From: "Anderson Mota Alves"
><mota_anderson@hotmail.com>
>To: <ccielab@groupstudy.com>
>Sent: Thursday, June 29, 2006 2:16 PM
>Subject: Doubt in QoS
>
>
>>Hi gurus, The question I need to complish is the following:
>>
>>Which configuration provides the mission-critical traffic class
>>with a
>>minimum
>>
>>bandwidth guarantee of 84 kbps and a maximum upper bandwidth limit
>>of 96
>>
>>kbps?
>>
>>I think I have to solution for this one but I'm not sure if I'm
>>right:
>>
>>policy-map shape
>>class mission-critical
>>bandwidth 84
>>shape peak 96000
>>
>>or
>>
>>policy-map shape
>>class mission-critical
>>priority 64
>>bandwidth 96
>>
>>Could anyone tell me which one I could use? Also I don't know if in
>>order
>>to use the shape peak I need to first configure the shape cir ir
>>order to
>>make sure that this will be the peak above the Cir.
>>
>>Thanks
>>
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