RE: Qos Clarification

Thanks for answering.
But what i am confused is, lets say for example a packet comes with cos
marking in 3560 switch, now as per what i have read on the different blogs is
that cos-dscp table will be consulted and cos will be changed to dscp and when
is leaving the switch it will be changed back to cos from dscp-cos table.
So I dont know why cos is getting converted to dscp is it because all the
prioritization or what stuff you want to do is done on dscp, as i am not clear
in the thought process of marking internally or you can say i want to know the
thought process of a switch and router.
Secondly is cos->dscp marking is only how switches work or switches and router
are same.

Thanks
> Date: Wed, 10 Apr 2013 10:21:23 +0300
> Subject: Re: Qos Clarification
> From: immrccie_at_gmail.com
> To: khanzadap_at_hotmail.com
> CC: ccielab_at_groupstudy.com
>
> for 1) if switch is receiving frames on a trunk link then COS will be
> considered , (experts can explain better how behavior changes with
> mutation maps / MLS settings on swith)
> on routed port on 3560 DSCP will be considered.
>
>
> On Wed, Apr 10, 2013 at 10:16 AM, sameer khan <khanzadap_at_hotmail.com>
wrote:
>
> > Hey guys,
> >
> > I need clarification on QOS, i always get confused about two things. If
> > any of
> > you can please clarify this to me.
> >
> > 1) A packet is marked with Cos and DSCP, what marking will be considered
> > internal by a 3560 & Routers. So basically how is router prioritizing the
> > packets internally.
> > 2) How do i calculated this, for example configure this shaping/policing
to
> > drop 3 ping packets and allow only 2 packets.
> >
> > Thanks
> >
> >
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Received on Wed Apr 10 2013 - 12:15:49 ART