RE: QoS quiz

Carlos,
So I would do:
Class-map match-all voice
 Match protocol rtp
 Match dscp ef
Policy-map child
 Class voice
  Priority percent 25
 Class class-default
  Bandwidth remaining percent 100
  Set dscp 0

David

--
http://dcp.dcptech.com
> -----Original Message-----
> From: Carlos G Mendioroz [mailto:tron_at_huapi.ba.ar]
> Sent: Friday, June 17, 2011 5:40 PM
> To: David Prall
> Cc: 'Cisco certification'
> Subject: Re: QoS quiz
> 
> Right.
> This is *one* thing I left out. All traffic should be marked.
> -Carlos
> 
> David Prall @ 17/06/2011 18:31 -0300 dixit:
> > You are matching on RTP, is all RTP already marked EF? You are using
> shape
> > average to provide artificial back-pressure at 2Mbps. You have
> provided for
> > 500Kbps within the 2Mbps so you will be fine as long as the carrier
> is
> > providing priority for the RTP traffic, if they are providing
> priority for
> > EF then you need to confirm that the application is setting EF or
> remark the
> > traffic on your own to EF. You also need to confirm that the traffic
> that is
> > not RTP, is not marked EF, otherwise the SP will put it into their EF
> queue
> > along with your RTP EF traffic, so remarking the class-default to 0
> may help
> > here.
> >
> > David
> >
> > --
> > http://dcp.dcptech.com
> >
> >> -----Original Message-----
> >> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf
> Of
> >> Carlos G Mendioroz
> >> Sent: Friday, June 17, 2011 5:05 PM
> >> To: Cisco certification
> >> Subject: QoS quiz
> >>
> >> Easy one, I would think.
> >>
> >> Say you have a wan link provided over metro (i.e. access rate is
> well
> >> over your contracted BW) and you want to apply QoS to protect your
> >> Voip.
> >>
> >> You have 2Mbps contract, 25% limit on EF marked traffic.
> >>
> >> Will this config do the right thing (i.e. protect your voip traffic
> >> from jitter caused by your data) ?
> >>
> >> class-map voice
> >>    match protocol rtp
> >>
> >> policy-map child
> >>   class voice
> >>    priority 500
> >>   class class-default
> >>    bandwidth remaining percent 100
> >>
> >> policy-map parent
> >>   class class-default
> >>    shape average 2000000
> >>    service-policy child
> >>
> >> inferface fastEthernet0/0
> >>   service-policy output parent
> >>
> >> --
> >> Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
> >>
> >>
> >> Blogs and organic groups at http://www.ccie.net
> >>
> >>
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> >>
> >>
> >
> >
> 
> --
> Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net