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!
> >
> >
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>
> --
> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
>
>
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>
> _______________________________________________________________________
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Received on Wed Dec 28 2011 - 14:59:32 ART