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

Hi Carlos,

Can the internal label be either DSCP or CoS based?

The non-IP traffic I was thinking about was ARP.

Thanks again!

> Date: Wed, 28 Dec 2011 12:16:33 -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....
>
> Robert Miele @ 28/12/2011 11:59 -0300 dixit:
> > 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?
>
> Yep, no problem for the switch, and you can keep the incoming value
> on exit with DSCP transparency.
>
> >
> > Also, are these internal DSCP labels applied to non-IP traffic?
>
> I would say so, but I don't know. Is there non IP trafic ? :)
>
> >
> > Thanks again!
>
> You are welcome,
> -Carlos
> >
> >
> > > 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
> > > >
> > > >
Received on Wed Dec 28 2011 - 16:13:31 ART