Implementing QoS requires careful planning. Roll out incrementally.
Implementation order:
Baseline current traffic. Measure before changes.
Configure marking. Start at edge. Apply DSCP marks.
Verify markings. Capture packets. Confirm correct values.
Deploy queuing. Configure LLQ and CBWFQ on congested links.
Test under load. Verify metrics. Confirm voice under ms.
Expand deployment. Roll out to remaining devices.
Monitor continuously. Traffic patterns change. Adjust policies.
QoS is not set-and-forget. New applications appear. Adjust as needed.