Using Low Latency Queuing
.. LLQ creates a strict priority queue that you can think of as resting on
top of all other CBWFQ queues.
.. LLQ overcomes the fact that low latency transmission may not be
provided to packets in congestion situations, since all packets are
transmitted fairly, based on their weight.
.. Because of the nature of the LLQ, it is recommended that only voice
traffic be placed in that queue.