6500 Sup 2T Etherchannel DSCP marking

Good Morning,
We are in the middle of a CUCM deployment and on the 6500 I need to set a DSCP or COS value on egress for the CUCM servers.   So far I have not found the correct way to set the DSCP.  I have attempted to create a service policy and apply it to the physical ports (and I tried the etherchannel just for kicks) and I get the following error:
Policy can not be installed because interface GigabitEthernet2/12 is a member of Port-channel
MQC features are not supported for this interface
How do I correctly set the DSCP value to EF on egress on these ports or the port-channel?
Thank you in advance for your assistance.
Justin

Hi Jon
Many thanks
I'm using vlan based QOS because later I'll add more vlans to the configuration, this is just initially to see how to use the QOS function on the 6500 - later we'll use this with more vlans.   Essentially the port that is currently gi1/1 may later be a truck port with 10+ vlan's bound to it (with associated vlan interfaces on the 6500).
Data arriving from the Server to the 6500 most likely won't have any or valid dscp markings,
allvoip is currently simplified just for icmp traffic for testing - so it's looking like this:
class-map match-all allvoip
  match access-group 100
access-list 100 permit icmp any any
What is just concerning me is that when I have a continuous ping running I'm getting deltas in the ping times when I have other data downloading off gi1/1 (which makes me think the strict priority queue isn't quite right).
If I can ask, if I wanted to rate limit the data on vlan6 (say limit the data to 10Mbit) and still also do marking in dscp to enable allocation to the differnet egress queues do you have any suggestions?   I can use a police statement classes on the policy-map but I don't really want to police each class seperately
kind of like
vlan 6 entire capacity policed to 10mbit
then inside that
allvoip marked EF (and then assigned COS 5 and 1P)
etc etc
cheers
Mark

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