Configure and Verify QoS Features SONIC-DEPLOY Practice Questions (Page 1)

Questions 1–5

1. 1expert · hard

   A network administrator has configured a complex QoS policy on a Dell SONiC switch that includes classification, marking, and policing. After deploying the policy, they notice that some traffic is not being policed as expected. They suspect the issue is with the classification. Which troubleshooting step would be most effective in isolating the problem?

   • AUse 'show qos interface' to confirm the policy is attached to the correct interface.
   • BUse 'show qos statistics' to see if the policer's counters are incrementing for the expected traffic.
   • CUse 'show running-configuration' to check the order of the class-maps in the policy-map.
   • DUse 'show qos maps' to verify the classification map is configured correctly.
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2. 2application · medium

   A university network team is configuring QoS on a Dell SONiC switch for their campus network. They need to ensure that video conferencing traffic (marked with DSCP AF41) is not dropped during congestion, while web browsing traffic (best-effort) can be dropped if necessary. They want to use WRED to manage congestion. What is the correct configuration approach?

   • AConfigure shaping on the AF41 queue to limit its bandwidth and prevent congestion.
   • BApply WRED to the physical interface and set the same drop thresholds for all traffic classes.
   • CUse a strict priority scheduler for the AF41 queue and rely on tail drop for the best-effort queue.
   • DConfigure WRED on the queue that handles AF41 traffic with a high drop threshold, and a lower threshold for the best-effort queue.
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4. 3application · medium

   An administrator has configured a QoS policy on a Dell SONiC switch to shape traffic from a specific server to 1 Gbps. After applying the policy, they want to verify that the shaping is working correctly. Which command output would provide the most direct evidence of shaping behavior?

   • AThe 'show interfaces counters' output showing the transmit rate on the interface is around 1 Gbps.
   • BThe 'show qos statistics' output showing the number of packets that matched the shaping policy.
   • CThe 'show qos interface' output showing the policy is attached to the correct interface.
   • DThe 'show qos maps' output showing the shaping rate is configured correctly.
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5. 4foundation · easy

   In Dell SONiC, which configuration object is used to apply a set of QoS policies (such as classification, marking, scheduling, and shaping) to a specific interface?

   • AAn ACL that is bound to the interface using the 'access-group' command
   • BA class-map that is directly applied to the interface using the 'class-map' command
   • CA QoS map that is bound to the interface using the 'qos-map' command
   • DA policy-map that is attached to the interface using the 'service-policy' command
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6. 5foundation · easy

   Which Dell SONiC CLI command is used to enter the configuration mode for a specific interface so that QoS features such as shaping can be applied?

   • Aconfigure terminal
   • Binterface Ethernet 1/1
   • Cpolicy-map interface Ethernet 1/1
   • Dqos interface Ethernet 1/1
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