D-SNC-DY-00: Dell SONiC DeployDemo

By Dell · Browse Mode
About the Exam

This qualifying exam covers intermediate skills needed to deploy, configure, maintain, and troubleshoot Dell Enterprise SONiC Distribution. It is intended for candidates pursuing the Dell SONiC Deploy certification. The exam includes topics such as SONiC installation and configuration, routing, VXLAN, and QoS. Passing the exam demonstrates the skills required to earn the certification.

Exam Topics

  • SONiC Bundles2%
  • SONiC Installation11%
  • SONiC Configuration40%
  • Routing24%
  • VXLAN16%
  • QoS7%

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Last updated November 23, 2025 at 11:58 PM

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QuestionQ1

SONiC Configuration

Which modes are supported by the QSFP28 ports on an S5248F?

  • A 1x 100 G, 1x 40 G, 2x 50 G, and 4x 25 G
  • B 1x 100 G, 1x 40 G, 4x 25 G, and 4x 10 G
  • C 1x 200 G, 1x 100 G, 1x 40 G, and 4x 25 G
  • D 1x 400 G, 2x 200 G, 4x 25 G, and 4x 10 G
Explanation

The S5248F QSFP28 interfaces support operation as one 100-GbE port, one 40-GbE port, two 50-GbE breakout interfaces, or four 25-GbE breakout interfaces. The 200-GbE and 400-GbE modes apply to higher-capacity port technologies, not standard QSFP28 ports.

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QuestionQ2

SONiC Configuration

Which three characteristics describe VLAN translation?

Choose three
  • A VLAN translation is not supported on MC-LAG port channel interfaces.
  • B Trunk or access ports can be configured as members of any VLANs that are not used as an SVLAN.
  • C By default, VLAN stacking is enabled on Z9432F-ON switches.
  • D The SVLAN header is replaced with a VNI if the provider network uses a VXLAN overlay.
  • E SVLAN configuration for both Q-in-Q VLAN tunneling and VLAN translation is possible on the same interface.
Explanation

VLAN translation is unsupported on MC-LAG port-channel interfaces. Trunk and access ports may belong to VLANs that are not designated as S-VLANs, and an interface can have S-VLAN configuration for both Q-in-Q VLAN tunneling and VLAN translation. On Z9432F-ON, VLAN stacking must be enabled before VLAN translation is used; with a VXLAN overlay, the S-VLAN is mapped to a VNI.

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QuestionQ4

VXLAN

Refer to the exhibit.

Question Image

The route distinguisher was generated automatically. Which VLAN is mapped to VNI 410?

  • A VLAN 410
  • B VLAN 41
  • C VLAN 10
  • D VLAN 26
Explanation

VNI 410 is the Layer 2 VXLAN segment associated with VLAN 10. An automatically derived EVPN route distinguisher identifies the MAC-VRF and must not be interpreted as the VNI or as a VLAN number; the automatically derived route target, by contrast, carries the VNI value.

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QuestionQ5

VXLAN

Enterprise SONiC Switch 1 and Switch 2 are components of a symmetric VXLAN fabric in a data-center environment. Switch 1 has learned MAC addresses from its local VLANs.

What is the role of BGP EVPN in this scenario?

  • A Distributes locally learned MAC addresses to Switch 2
  • B Establishes Layer 2 connectivity between Switch 1 and Switch 2
  • C Enables efficient communication across the VXLAN fabric
Explanation

BGP EVPN distributes locally learned MAC reachability information through EVPN MAC/IP Advertisement routes to other participating switches. This enables Switch 2 to install reachability information for MAC addresses learned by Switch 1.

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QuestionQ6

SONiC Configuration

How many port channels may be assigned to one port?

  • A 8
  • B 2
  • C 4
  • D 1
Explanation

A physical interface can be a member of only one port channel at a time, because a port channel is the interface’s single logical link-aggregation membership.

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Topics covered
SONiC BundlesSONiC InstallationSONiC ConfigurationRoutingVXLANQoS
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