300-415 Question #217: Real Exam Question with Answer & Explanation

The correct answer is A: Policy class-map class p1 queue 2. To classify traffic and assign it to a specific output queue upon ingress at a WAN Edge router, a class-map is defined to match traffic and then map it to a queue.

Security and Quality of Service

Question

Which policy configuration must be used to classify traffic as it enters the branch WAN Edge router to be put into the desired output queue?

Options

APolicy class-map class p1 queue 2
BPolicy access-list QoS sequence 1 match destination-ip 10.0.0.0/8 ! action accept class p1
CPolicy qos-scheduler QOS class p1 bandwidth-percent 20 buffer-percent 20 drops red-drop
Dqos-map Q_Map qos-scheduler p1

Explanation

To classify traffic and assign it to a specific output queue upon ingress at a WAN Edge router, a class-map is defined to match traffic and then map it to a queue.

Common mistakes.

B. An 'access-list QoS' definition with 'action accept class p1' is used to classify traffic into a specific class within an access list, but it does not directly assign it to an output queue; that's done in the class-map definition.
C. A 'qos-scheduler' defines the scheduling parameters for a class (like bandwidth, buffer, and drop policy), but it doesn't perform the initial classification and assignment to a queue.
D. 'qos-map Q_Map qos-scheduler p1' is an incorrect or incomplete command structure for classifying traffic to a queue; QoS mapping typically involves associating classes with schedulers or forwarding classes.

Concept tested. QoS traffic classification and queue mapping

Reference. https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/sdwan-xe-gs-book/sdwan-quality-of-service.html

Topics

#QoS#Traffic Classification#WAN Edge#Class-map

Community Discussion

No community discussion yet for this question.

Full 300-415 Practice