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