Because the Cisco Catalyst 6500 is still very much a L2 switch with most of the linecards that are purchased. Layer 3 QoS is not much of an option. There are very limited features to this.
Therefore, what is typically applied on these types of switches are layer 2 CoS. I’ll be showing you examples of configurations per linecard module. Yes, each module model is going to be different because CoS is much of a hardware feature. This is why quality of service is always a pain to deploy, but once you have down the basic templates… you can standardize to have end-to-end QoS.

WS-X6708-10G-3C:

 wrr-queue bandwidth 30 40 30 0 0 0 0
 priority-queue queue-limit 30
 wrr-queue queue-limit 70 20 10 0 0 0 0
 wrr-queue random-detect min-threshold 1 80 80 80 80
 wrr-queue random-detect min-threshold 2 80 80 80 80
 wrr-queue random-detect min-threshold 3 80 80 80 80
 wrr-queue random-detect max-threshold 1 100 100 100 100
 wrr-queue random-detect max-threshold 2 100 100 100 100
 wrr-queue cos-map 1 1 0 1
 wrr-queue cos-map 2 1 2 3
 priority-queue cos-map 1 4 5
 mls qos trust dscp

WS-X6704-10GE:

 wrr-queue bandwidth 30 40 30 0 0 0 0
 priority-queue queue-limit 30
 wrr-queue queue-limit 70 20 10 0 0 0 0
 wrr-queue random-detect min-threshold 1 80 80 80 80 80 80 80 80
 wrr-queue random-detect min-threshold 2 80 80 80 80 80 80 80 80
 wrr-queue random-detect min-threshold 3 80 80 80 80 80 80 80 80
 wrr-queue random-detect max-threshold 1 100 100 100 100 100 100 100 100
 wrr-queue random-detect max-threshold 2 100 100 100 100 100 100 100 100
 wrr-queue cos-map 1 1 0 1
 wrr-queue cos-map 2 1 2 3
 priority-queue cos-map 1 4 5
 mls qos trust dscp

More to follow…