[nsp] Fwd: IP QoS with FR/ATM?

[Tom Scott]

J,

You could be asking about the mechanics of how the cells, frames and packets 
get "marked". I don't know if Cisco has shared that with us (customers). But 
I remember finding something about L3-to-L2 QoS mappings in one of the many 
CCO docs I've browsed, and I even put the chart on a wall, something like 
this:
             L2     L3 IP         L3
             CoS    Precedence    DSCP
voice RTP    5      5             EF
voice RTCP   3      3             AF31
video        4      4             AF41
data         0-2    0-2           0-AF23

Beware of typos.

-- TT


JJ wrote:
> 
> Trying to emphasis my confusion:
> since the atm/fr vcs have cbr, vbr or cir, so they
> must have queues per pvc for cells or frames, ip qos
> such as CBWFQ has queues for different classes of ip
> packets, how do they work together?
> 
> Thanks
> 
> --- JJ <yulingna@yahoo.com> wrote:
> > Date: Tue, 8 Oct 2002 20:17:26 -0700 (PDT)
> > From: JJ <yulingna@yahoo.com>
> > Subject: IP QoS with FR/ATM?
> > To: cisco-nsp@puck.nether.net
> >
> > I am trying to understand how ip qos works with FR
> > and
> > ATM.
> >
> > I read that both FR and ATM do per vc queueing, is
> > this true?
> >
> > If I configure CBWFQ udner one fr or atm pvc, does
> > the
> > router have two sets of queues? one set for
> > different
> > classes of ip packets, after the ip packet got
> > dequeued from the ip layer, they will be queued
> > again
> > under that pvc? is it same for fr and atm?
> >
> > I can not find anything from cco, all of the qos
> > docs
> > either explain ip qos or atm/fr qos.
> >
> > thanks for any help.
> >
> > JJ