Configure and Verify QoS Features SONIC-DEPLOY Practice Questions (Page 2)

Questions 6–10

1. 6expert · hard

   A cloud provider is deploying a Dell SONiC switch to support multi-tenant traffic. Each tenant has different QoS requirements. The provider needs to ensure that tenant A's traffic (marked with DSCP 10) is shaped to 1 Gbps, while tenant B's traffic (marked with DSCP 20) is shaped to 2 Gbps. Both tenants share the same physical uplink. Which configuration approach should be used?

   • AUse a single class-map that matches both DSCP 10 and DSCP 20, and apply a single 1.5 Gbps policer.
   • BCreate two separate policy-maps, one for each tenant, and apply them to the same uplink interface.
   • CCreate a single policy-map with two class-maps, one matching DSCP 10 with a 1 Gbps policer and another matching DSCP 20 with a 2 Gbps policer, and apply it to the uplink.
   • DConfigure shaping on the physical uplink to 3 Gbps and rely on the tenants' applications to manage their own rates.
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2. 7foundation · easy

   Which Dell SONiC show command displays the number of packets that have been marked or remarked on an interface, allowing verification of QoS marking behavior?

   • Ashow qos map
   • Bshow interface counters
   • Cshow qos statistics
   • Dshow policy-map
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4. 8application · medium

   A network administrator has configured a QoS policy on a Dell SONiC switch to remark DSCP values for traffic entering from a specific access port. After applying the policy, they want to confirm that the remarking is actually happening on live traffic. Which set of commands should they use to verify this behavior?

   • ACapture packets on the egress interface with tcpdump or a similar tool and inspect the DSCP field in the IP header.
   • BUse 'show qos statistics' to view the per-policy counters and confirm packets are being matched and remarked.
   • CUse 'show qos maps' to display the configured remarking table and confirm the policy is correct.
   • DUse 'show qos interfaces' and 'show qos statistics' to check the policy attachment and packet counters.
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5. 9foundation · easy

   After configuring a scheduling policy on a Dell SONiC interface, which show command would you use to verify that the policy is correctly applied and active?

   • Ashow qos interface Ethernet 1/1
   • Bshow interface Ethernet 1/1
   • Cshow qos statistics
   • Dshow running-config interface Ethernet 1/1
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6. 10application · medium

   A financial trading firm runs latency-sensitive market data feeds on a Dell SONiC switch. The network team must ensure that time-critical multicast traffic from a specific trading application is prioritized over bulk file transfers on the same 40GbE uplink. They plan to classify traffic using DSCP values already set by the application servers. Which configuration approach should they use on the SONiC switch?

   • ASet the interface MTU to 9216 to reduce packet processing overhead for the market data traffic.
   • BEnable PFC on the uplink for all priorities to prevent loss of the market data traffic.
   • CApply a policy-map that matches DSCP 46 and sets the traffic class to 5, then attach it to the ingress interface.
   • DConfigure a scheduler with strict priority and apply it directly to the physical uplink interface.
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