300-415 · Question #247
An engineer must configure egress QoS for voice traffic. Which queue must the engineer configure on the WAN Edge router to accomplish the task?
The correct answer is A. queue 0. For egress QoS configuration on a Cisco WAN Edge router, voice traffic is typically assigned to queue 0 to ensure it receives the highest priority and minimal latency.
Question
Options
- Aqueue 0
- Bqueue 1
- Cqueue 3
- Dqueues 7
How the community answered
(61 responses)- A95% (58)
- C3% (2)
- D2% (1)
Why each option
For egress QoS configuration on a Cisco WAN Edge router, voice traffic is typically assigned to queue 0 to ensure it receives the highest priority and minimal latency.
In Cisco SD-WAN QoS, queue 0 is generally designated for high-priority, low-latency traffic such as voice. It often utilizes a low-latency queuing (LLQ) mechanism to provide preferential treatment, ensuring voice quality.
Queue 1 is typically used for control plane traffic in Cisco SD-WAN, not general voice traffic.
Queue 3 is generally used for network management traffic or medium-priority application traffic, not specifically for high-priority voice.
Queue 7 is typically used for best-effort or scavenger traffic, which is the lowest priority and unsuitable for voice.
Concept tested: Cisco SD-WAN QoS queue assignments for voice
Source: https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/sdwan-xe-gs-book/sdwan-qos.html
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