Enabling subinterface queuing and scheduling by configuring the traffic management mode

Switching the traffic-management-mode requires a system reboot. However, for the reboot to succeed, you must first remove any configurations that are not supported in the new target mode.

To transition from eight-priority mode to two-priority mode, you must first disable the PFC feature on all interfaces and remove the following configuration paths:

qos buffer-management buffer-allocation-profile queues queue maximum-burst-size-delay
qos buffer-management buffer-allocation-profile queues queue low-threshold-bytes
qos scheduler-policies scheduler-policy scheduler 0 input weight
qos scheduler-policies scheduler-policy scheduler 0 input peak-rate-percent

To transition from two-priority mode to eight-priority mode, you must first remove the following configuration paths for subinterfaces (interface-level configurations can remain):

qos interfaces interface output queues queue  
qos interfaces interface output scheduler scheduler-policy 
qos interfaces interface output buffer-allocation-profile
qos scheduler-policies scheduler-policy scheduler 0 input priority-level
qos scheduler-policies scheduler-policy scheduler [ 0 | 1 ] input committed-rate-kbps
qos scheduler-policies scheduler-policy scheduler [ 0 | 1 ] input committed-rate-percent 
qos scheduler-policies scheduler-policy scheduler 1 input peak-rate-kbps
qos scheduler-policies scheduler-policy scheduler 1 output output-type               
qos scheduler-policies scheduler-policy scheduler 1 output peak-rate-percent