RE: MQC bandwidth

From: Chris Lewis \(chrlewis\) (chrlewis@cisco.com)
Date: Wed Sep 28 2005 - 16:07:48 GMT-3


Good point.

Bringing in the frame relay encapsulation; up until 12.2(13)T it was
necessary to configure frame-relay traffic shaping in a class map for
MQC to take effect and for the show policy-map interface command to show
anything. This is no longer the case. You can do the same trick with
shaping as decribed below to configure MQC on a per sub-interface (so in
the case of a p2p interface, this is per DLCI) basis for frame relay
too.

Details at
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft
/122t/122t13/frqosmqc.htm#wp1056282

Chris

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Victor Cappuccio
Sent: Wednesday, September 28, 2005 1:40 PM
To: simon hart
Cc: Stefan Grey; ccielab@groupstudy.com
Subject: Re: MQC bandwidth

We are not allowed to do queuing on a Subinterface, but we can shape on
a Subinterface/ so doing nested CBWFQ Policies to cheat requirements.

class-map match-all Trafico_VOZ
     match access-group 100

policy-map HIJA
  class Trafico_VOZ
   priority 12

on sub int we are not allowed to apply it so we create another policy
name parent policy-map PAPA
  class class-default
   shape average 1000000
   service-policy HIJA

interface Ethernet0/0.50
 encapsulation dot1Q 50
 ip address X.X.X.X
 service-policy output PAPA

Victor-.

simon hart wrote:

>Stefan,
>
>What type of subinterface?
>
>For example if it is a frame relay subinterface you will need to
>configure frame relay traffic shaping in order to assign CBWFQ. By
>doing so you will either set CIR or min CIR within a Map-class
Frame-relay.
>
>In such a case then the MQC will take half of the configured CIR or the

>configured minCIR.
>
>CBWFQ is not supported on Ethernet subinterfaces
>
>Router output----------
>
>Router(config)#int fa1/0.1
>Router(config-subif)#service-policy out QOS CBWFQ : Not supported on
>subinterfaces
>
>
>Simon
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
>Stefan Grey
>Sent: 28 September 2005 17:25
>To: ccielab@groupstudy.com
>Subject: MQC bandwidth
>
>
>Hello group,
>
>Question:
>
>"Output queue calculations for the MQC are based on the configured
>bandwidth value of the interface and not the speed the interface is
>clocked at. Be sure to set the appropriate bandwidth value when
>configuring the MQC on an interface."
>
>When we configure CBWFQ on the subinterface should we configure the
>reference bandwidth on the subinterface itself or on the physical
interface.
>Where does router look for reference??
>
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