Re: Doubt in QoS

From: Petr Lapukhov (petr@internetworkexpert.com)
Date: Thu Jun 29 2006 - 07:42:55 ART

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
> 
> _______________________________________________________________________
> Subscription information may be found at: 
> http://www.groupstudy.com/list/CCIELab.html

This archive was generated by hypermail 2.1.4 : Sat Jul 01 2006 - 07:57:34 ART