300-415 Question 269
Select 2A network engineer is configuring a Cisco SD-WAN environment to prioritize voice traffic over other types of traffic. The engineer decides to use DSCP marking to classify this traffic at the branch site. Which of the following steps are necessary to implement traffic marking for voice traffic in Cisco SD-WAN?
- A
Define a centralized policy with a traffic data rule to match voice traffic based on DSCP values.
- B
Create a QoS map within the SD-WAN template to assign specific DSCP values to voice traffic.
- C
Apply the policy to specific sites or VPNs using the vManage policy framework.
- D
Configure traffic marking directly on the WAN edge routers using CLI commands outside of vManage.
- E
Enable DSCP rewrite in the TLOC extension configuration.
Show answer and explanation
Correct answers: A, C
Explanation
To implement traffic marking in Cisco SD-WAN, a centralized policy is created to match traffic (e.g., voice traffic) and assign appropriate DSCP values. This policy is then applied to specific sites or VPNs using vManage. Traffic marking is managed centrally in SD-WAN environments for consistency and scalability, avoiding direct configuration on individual routers.
- A. Correct.
This is correct. A centralized policy in Cisco SD-WAN is used to match specific traffic, such as voice traffic, based on DSCP values or other parameters.
- B. Incorrect.
This is incorrect. QoS maps are used for traffic shaping and queuing, not for defining traffic marking policies.
- C. Correct.
This is correct. Policies in Cisco SD-WAN need to be applied to specific sites or VPNs to take effect.
- D. Incorrect.
This is incorrect. While marking can be configured directly on routers, the SD-WAN solution relies on vManage for centralized configuration and avoids CLI-based individual router configurations.
- E. Incorrect.
This is incorrect. TLOC extensions are used for extending transport links between SD-WAN devices and do not involve traffic marking or DSCP rewrite.