[c-nsp] Is this QoS config possible in 7600 with WS-X6724-SFP?

[Peter Olsson]

We usually use this QoS config to give voice traffic priority:
class-map match-all VOICE
 match ip dscp ef 
policy-map BRANCH-WAN-EDGE_child
 class VOICE
  priority percent 10
 class class-default
  fair-queue
  random-detect dscp-based
policy-map BRANCH-WAN-EDGE_parent
 class class-default
  shape average 100000000
  service-policy BRANCH-WAN-EDGE_child
interface GigabitEthernet0/1.402
 service-policy output BRANCH-WAN-EDGE_parent

But now we have to do this in a 7609 with WS-X6724-SFP cards.
The setup is that the WAN lines come in on a 3750 switch, and
the 3750 switch is connected to the 7609 on two gigabit ports
in different WS-X6724-SFP cards, combined by a port-channel.
In the 7609 the WAN VLAN is terminated like this:
interface Vlan402
 bandwidth 100000
 ip address xxx

All physical ports in the 7609 trust dscp:
mls qos trust dscp
Other than that we only have this QoS config in the 7609:
mls qos
mls qos map cos-dscp 0 8 16 24 32 46 48 56

I tried our usual config and some other variants, but the
7609 won't accept shaping or priority or hierarchical QoS.
Probably because it doesn't have real WAN cards since the WAN
lines are connected to the 3750.

Is there any way to do what we want in the 7609?
The only requirement right now is to give priority to traffic
marked with dscp ef. We would prefer to configure this priority
per VLAN if possible, but will do it on the physical interfaces
(or maybe on the port-channel?) if that's the only way.

A possible complication is that the WAN lines have different
bandwidth. Usually 50 Mbps, but some are 100 Mbps. This is why
priority configuration per VLAN is preferred.

Thanks!

-- 
Peter Olsson                    pol at leissner.se