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300-415 · Question #353
300-415 Question #353: Real Exam Question with Answer & Explanation
The correct answer is C: The "Bandwidth Downstream" field must be configured with a value.. When Per-tunnel QoS Aggregator is enabled on a VPN Interface Ethernet feature template, the Bandwidth Downstream field must be configured to define the downstream capacity used for QoS shaping calculations.
Security and Quality of Service
Question
Refer to the exhibit. A user has selected the options while configuring a VPN Interface Ethernet feature template. The exhibit shows a "TUNNEL" configuration with "Tunnel Interface" (On), "Per-tunnel QoS" (On), and "Per-tunnel QoS Aggregator" (On). What is the required configuration parameter the user must set in this template for this feature to function?
Options
- AThe "Shaping Rate (Kbps)" field must be configured with a value.
- BThe "IP MTU" field must be increased from the default value of 1500 to support the additional overhead.
- CThe "Bandwidth Downstream" field must be configured with a value.
- DThe "Adaptive QoS" field must be set to "on".
Explanation
When Per-tunnel QoS Aggregator is enabled on a VPN Interface Ethernet feature template, the Bandwidth Downstream field must be configured to define the downstream capacity used for QoS shaping calculations.
Common mistakes.
- A. The 'Shaping Rate (Kbps)' field is not a required parameter for Per-tunnel QoS Aggregator; the downstream bandwidth value is what drives the shaping calculation.
- B. Increasing IP MTU above 1500 addresses tunnel overhead handling and is not a mandatory requirement for enabling Per-tunnel QoS Aggregator functionality.
- D. The 'Adaptive QoS' field is a separate optional feature that dynamically adjusts shaping rates and is not required for Per-tunnel QoS Aggregator to function.
Concept tested. Per-tunnel QoS Aggregator bandwidth downstream configuration requirement
Topics
#Cisco SD-WAN#Quality of Service (QoS)#VPN Interface Configuration#Feature Templates
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