Continous QoS Concept - Access -> Core

Hi,

I should implement a QoS Concept in a given network.
The main components are
Access - cat 4500,
Distribution and Core - 6509
The first QoS step is to configure for VoIP.
I would like to implement the 'conditionally-trusted IP Phone with
Scavenger-Class QoS(Basic) Model
The configuration in the Cat 4506 is ok because it is possible to cfg
it via class-map and policy maps and place it to the incoming Interface
where the IP phone and pc connected is.
So what is the next step ?
Should I cfg queuing in the downstream interface to the distribution
switches ?
And what about this cfg in the cat 6509 ? It is not possible to cfg the
'conditionally-trusted IP Phone with Scavenger-Class QoS(Basic) Model'
with the cisco IOS ?
The cisco model for the distribution means : trust dscp, interfacegroup
line card dependent queuing and dropping !!??
For me it means I cfg in the distribution/core trust dscp in the
upstream interfaces to the access/distribution router ?!
but where shoud i implement queuing and dropping ? and what strategy ??

thanks

.

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