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Dell D-SNC-DY-00 Exam
Dell SONiC Deploy (Page 3 )

Updated On: 1-Feb-2026
Page 2 of 10
PDF with 45 Questions

Refer to the exhibit.



What can be determined from this show command?

  1. Traffic below 100 KB is marked as congested
  2. ECN is enabled for all colors
  3. ECN is enabled for all DSCP values
  4. There is a 10% probability that traffic is marked as congested

Answer(s): B

Explanation:

The output of the command show qos wred-policy pfc34 shows the ECN (Explicit Congestion Notification) configuration for the policy pfc34. The line ecn: ecn_all indicates that ECN is enabled for all traffic classes (all DSCP values). Additionally, the green-min-threshold, green-max-threshold, and green-drop-probability settings are shown, but there is no indication of a 10% probability for marking traffic as congested. Therefore, the correct answer is B.


Reference:

Dell Enterprise SONiC documentation

Dell Technologies InfoHub



Refer to the exhibit.



The router ID has not been manually configured.
What router ID is used for Switch 3?

  1. 192.168.100.2
  2. 192.168.100.0
  3. 10.0.2.1
  4. 10.0.1.1

Answer(s): D

Explanation:

In the absence of a manually configured router ID, OSPF typically uses the highest IP address on the switch's active interfaces. For Switch 3 in the exhibit, the highest IP address is 10.0.1.1 on Loopback
0. Therefore, 10.0.1.1 is used as the router ID for Switch 3.


Reference:

Dell Technologies SONiC documentation

OSPF Configuration Guide



Refer to the exhibit.



Eth 1/1 of SONiC-1 and Eth1/56 of SONiC-2 should be a routed link connecting the two Enterprise SONiC switches. No traffic is passing between them.

What is the cause of the failure?

  1. An incorrect IPv6 address type was used for interface Eth1/56 of SONiC-2.
  2. A spanning-tree is blocking the routed link.
  3. IPv6 is not enabled on interface Eth 1/1 of SONiC-1.
  4. There is a cable that is unplugged between SONiC-1 and SONiC-2.

Answer(s): A

Explanation:

From the exhibit, it is evident that Eth1/56 on SONiC-2 is assigned a link-local IPv6 address (fe80::e7d:8aff:fecb

/64). Link-local addresses are not routable beyond the local network segment, which means they cannot be used to route traffic between SONiC-1 and SONiC-2. For routed links, global unicast addresses must be used.


Reference:

Dell Technologies SONiC documentation

IPv6 Addressing Guide



Which two additional Q-in-Q VLAN tunnel configuration steps must be followed if the provider network uses a VXLAN overlay?

  1. Configure VLAN Translation.
  2. Map the SVLAN traffic to a VNI.
  3. Remove the CVLAN-to-SVLAN mapping.
  4. Configure the BGP route-target and route-distinguisher.

Answer(s): A,B

Explanation:

Configure VLAN Translation (A): VLAN translation is necessary to translate customer VLANs (CVLANs) to service VLANs (SVLANs) for Q-in-Q tunneling in a VXLAN environment.

Map the SVLAN traffic to a VNI (B): SVLAN traffic must be mapped to a VXLAN Network Identifier

(VNI) for encapsulation and transport across the VXLAN overlay network.


Reference:

Dell Technologies SONiC documentation

VXLAN Configuration Guide



What two methods can be used to upgrade or downgrade Enterprise SONiC?

  1. Boot Loader
  2. SONiC-CLI
  3. MF-CLI
  4. GRUB

Answer(s): A,D

Explanation:

Enterprise SONiC can be upgraded or downgraded using:

Boot Loader (A): The boot loader can be used to select and load different versions of the SONiC firmware.

GRUB (D): GRUB (Grand Unified Bootloader) is another method used to manage and select different SONiC firmware versions during system boot-up.


Reference:

Dell Technologies SONiC documentation

SONiC Upgrade Guide



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