Question

A network engineer is configuring LLQ on a WAN-edge router to protect voice media traversing a congested serial link. Voice RTP has been marked EF (DSCP 46) by the IP phones, and call-signaling traffic is marked CS3 (DSCP 24). The engineer needs to guarantee low-latency, prioritized treatment for the voice media specifically, reserving 1000 kbps for it. Which configuration element correctly provides strict priority queuing for the voice media within the LLQ policy?

Accepted Answer

Under the voice class in the policy-map, apply the command 'priority 1000' to place matched EF traffic into the low-latency (strict priority) queue

Answer

Under the voice class in the policy-map, apply 'bandwidth 1000' to reserve guaranteed bandwidth using CBWFQ for the EF traffic

Answer

In the class-map, apply 'priority percent 100' so all matched traffic is policed before queuing

Answer

Apply 'service-policy input' on the serial interface so EF traffic is prioritized inbound before congestion occurs