Re: Clarification needed - Catalyst "Internal QoS" Label....

Internal QoS label may also refer to router's qos-group. After all,
that's also an internal QoS label.

I was talking about internal DSCP. There are many documents that refer
to it, you may want to read:

   "Cisco Catalyst QoS: Quality of Service in Campus Networks" chapter 6.

or go:

http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND_40/QoSCampus_40.html#wp1098036

-Carlos

Aaron @ 28/12/2011 12:11 -0300 dixit:
> Robert, thanks for asking this question, I was wondering the same thing
> recently after listening to a CCIE Audio Bootcamp and hearing reference to
> "Internal QOS label" and wondering what in the world is that.
>
> Does anyone know where there is a cisco document that backs up this talk
> about internal qos label?
>
> Aaron
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Robert Miele
> Sent: Wednesday, December 28, 2011 9:00 AM
> To: tron_at_huapi.ba.ar
> Cc: ccielab_at_groupstudy.com
> Subject: RE: Clarification needed - Catalyst "Internal QoS" Label....
>
> Thanks for the reply Carlos,
>
> I referred to it as "internal QoS" label as I believe I read somewhere
> online
> that on the 3560 it could either be DSCP or CoS.
>
> So the internal DSCP label and the DSCP label present in the L3 packet
> header
> can be two different values?
>
> Also, are these internal DSCP labels applied to non-IP traffic?
>
> Thanks again!
>
>
>> Date: Wed, 28 Dec 2011 07:42:29 -0300
>> From: tron_at_huapi.ba.ar
>> To: guile474_at_hotmail.com
>> CC: ccielab_at_groupstudy.com
>> Subject: Re: Clarification needed - Catalyst "Internal QoS" Label....
>>
>> I guess you are referring to "internal DSCP" ?
>> If so, this is a normalized way of treating QoS clasification of trafic
>> across different architectures.
>>
>> I would not call it a "parameter" because you don't set it.
>> It is a value that gets attached to flowing frames/packets (a field, if
>> you like, but not in the packet but in a control data structure internal
>> to the switch). And it determines how the QoS functions affect the
>> frame during its switching.
>>
>> This way you can define policies on input interfaces (to pay attention
>> to COS os TOS or static values) and mappings, and then use the same
>> internal treatment for all based on internal DSCP. It also allows you
>> to do remarking on exit of TOS (or not).
>>
>> -Carlos
>>
>> Robert Miele @ 27/12/2011 23:22 -0300 dixit:
>>> Hello,
>>>
>>> I'm hoping someone can help me understand the concept of the "internal
> QoS"
>>> label on the 3560 Catalyst switch from an architectual viewpoint.
>>>
>>> For example, is this "internal QoS" a parameter internal to the switch,
> or
> is
>>> a field added to the packet, or is it simply rewriting the value in the
>>> DSCP/CoS fields.
>>>
>>> Thanks!
>>>
>>>
>>> Blogs and organic groups at http://www.ccie.net
>>>
>>> _______________________________________________________________________
>>> Subscription information may be found at:
>>> http://www.groupstudy.com/list/CCIELab.html
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>> --
>> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>

-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net