I have a site trying to do the following:
service-policy output voip
and receives the following error:
priority command is not supported in output direction for this interface
I found that the WS-X6704-10GE doesn't support "priority" queueing. So, what line cards will support priority queueing on a CAT 6509? Or is there another way to configure?
Ah okay. You can't use the MQC LLC priority command set because you don't use MQC commands for egress queueing on catalyst switches.
The 6704-10GE does have a priority queue which you can use for priority traffic for voice etc. but you don't configure it with the priority command. You need to set up which CoS/Dscp values go to which queue and how much bandwidth each queue gets.
Attached is a link to QOS config on 6500 with an example including a priority queue -