[Mar 20, 2025] Free Dell Networking D-SNC-DY-00 Official Cert Guide PDF Download
EMC D-SNC-DY-00 Official Cert Guide PDF
NEW QUESTION # 10
An administrator obtains the following CLI output:
How much time does the local system take to detect remote failures without receiving packets?
- A. 1200 milliseconds
- B. 900milliseconds
- C. 800 milliseconds
- D. 600 milliseconds
Answer: B
Explanation:
The local timers in the BFD (Bidirectional Forwarding Detection) configuration show a detect multiplier of 4 and a receive interval of 300ms. The time taken to detect remote failures is calculated as detect multiplier × receive interval = 4 × 300ms = 1200ms.
References:
* Dell Technologies SONiC documentation
* BFD Configuration Guide
NEW QUESTION # 11
Which two additional Q-in-Q VLAN tunnel configuration steps must be followed if the provider network uses a VXLAN overlay?
- A. Configure the BGP route-target and route-distinguisher.
- B. Remove the CVLAN-to-SVLAN mapping.
- C. Map the SVLAN traffic to a VNI.
- D. Configure VLAN Translation.
Answer: C,D
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.
References:
* Dell Technologies SONiC documentation
* VXLAN Configuration Guide
NEW QUESTION # 12
In what order should these commands be entered to configure an access port in SONiC CLI if the required VLAN is already configured?
Answer:
Explanation:
Explanation:
To configure an access port on the SONiC CLI, the commands should be entered in the following order:
* Enter global configuration mode with configure terminal.
* Specify the interface to configure using interface ethernet 1/1.
* Set the interface to access mode and assign it to VLAN 20 with switchport access vlan 20.
* Exit the interface configuration mode with exit.
References:
* Dell Technologies SONiC Command Reference Guide
* Dell Networking Configuration Guide
NEW QUESTION # 13
What is the correct order of steps for data flow in asymmetric IRB frame encapsulation?
Answer:
Explanation:
Explanation:
* Ingress VTEP performs a route lookup that is based on the destination IP address.
* Ingress VTEP encapsulates the packet with VXLAN and sends it on the appropriate VNI segment.
* Egress VTEP determines that the host is local to the VNI and switches the packet.
* Egress VTEP bridges the packet after decapsulation.
Steps and Correct Order:
* Ingress VTEP performs a route lookup that is based on the destination IP address.
* The ingress VTEP (Virtual Tunnel Endpoint) first needs to determine the next hop for the packet.
This involves performing a route lookup using the destination IP address.
* Ingress VTEP encapsulates the packet with VXLAN and sends it on the appropriate VNI segment.
* Once the route lookup is complete, the ingress VTEP encapsulates the packet in a VXLAN header, which includes the appropriate VNI (VXLAN Network Identifier) segment, and forwards it.
* Egress VTEP determines that the host is local to the VNI and switches the packet.
* The egress VTEP receives the encapsulated VXLAN packet, decapsulates it, and then checks its local VNI to determine if the destination host is within the same VNI.
* Egress VTEP bridges the packet after decapsulation.
* After determining the destination host's locality, the egress VTEP bridges the packet to the appropriate interface to deliver it to the final destination.
References:
* Dell Technologies Networking - SONiC
* Dell Enterprise SONiC Deployment Guide
These steps provide a comprehensive guide to understand the correct order of operations in asymmetric IRB (Integrated Routing and Bridging) frame encapsulation within a VXLAN environment.
NEW QUESTION # 14
Refer to the exhibit.
What can be determined from this show command?
- A. ECN is enabled for all colors
- B. ECN is enabled for all DSCP values
- C. There is a 10% probability that traffic is marked as congested
- D. Traffic below 100 KB is marked as congested
Answer: A
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.
References:
* Dell Enterprise SONiC documentation
* Dell Technologies InfoHub
NEW QUESTION # 15
What is ECMP?
- A. A routing protocol database filter supporting a maximum of four paths
- B. A round-robin path distribution mechanism
- C. A Layer 3 routing feature to forward traffic using multiple available paths
- D. A routing protocol with multipath support
Answer: C
Explanation:
ECMP (Equal-Cost Multi-Path) is a Layer 3 routing feature that allows traffic to be forwarded using multiple available paths of equal cost. This improves bandwidth utilization and provides redundancy. ECMP is commonly used in modern networks to optimize the flow of traffic and increase the resiliency of network connections.
References:
* Dell Technologies SONiC documentation
* ECMP Configuration Guide
NEW QUESTION # 16
Which network devices route unencapsulated user traffic in a symmetric IRB overlay network?
- A. Capability extended next hop router and leaf router
- B. Autonomous system boundary router and source VTEP
- C. Leaf router and spine router
- D. Source VTEP and destination VTEP
Answer: D
Explanation:
In a symmetric Integrated Routing and Bridging (IRB) overlay network, the Source Virtual Tunnel End Point (VTEP) and the Destination VTEP route unencapsulated user traffic. Symmetric IRB ensures that routing occurs at both the ingress and egress VTEPs, allowing for optimized traffic flow and efficient network operations.
References:
* Dell Technologies SONiC documentation
* VXLAN Configuration Guide
NEW QUESTION # 17
Which protocol is used to perform an automated installation of Enterprise SONiC?
- A. SCP
- B. SFTP
- C. HTTP
Answer: C
Explanation:
The automated installation of Enterprise SONiC is typically performed using the HTTP protocol. During the Zero Touch Provisioning (ZTP) process, the switch retrieves configuration files and software images from an HTTP server, allowing for automated and streamlined deployments.
References:
* Dell Technologies SONiC documentation
* ONIE User Guide
NEW QUESTION # 18
What is a correct use-case scenario for ZTP in Enterprise SONiC?
- A. The user wants multivendor switch deployment.
- B. The user wants to replace a failed unit and use an automatic script.
- C. The user wants single pane of glass monitoring.
- D. The user wants to configure the switch manually using the CLI.
Answer: B
NEW QUESTION # 19
How many port channels can be assigned to a single port?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
Explanation:
According to the Dell SONiC documentation, a single physical port can be a member of only one port channel at a time. This restriction ensures the consistency and integrity of link aggregation configurations.
References:
* Dell Networking SONiC: How to Configure Port Channels
* Dell Technologies InfoHub
NEW QUESTION # 20
An administrator for a service provider uses this command on a switch:
What is the result of running the command?
- A. Maps the VLAN traffic that an SVLAN identifies to a VNI on a VTEP
- B. Maps the VLAN traffic that a TPID identifies to a VNI on a VTEP
- C. Maps the VLAN traffic that a CVLAN identifies to a VNI on a VTEP
Answer: A
Explanation:
The command interface vxlan vtep-stacking followed by map vni 10010 vlan 100 maps the VLAN traffic that an SVLAN identifies to a VNI on a VTEP. In this context, SVLAN (Service VLAN) is being mapped to a VXLAN Network Identifier (VNI) for encapsulation and transport across the VXLAN tunnel.
References:
* Dell Technologies SONiC documentation
* VXLAN Configuration Guide
NEW QUESTION # 21
Which two elements are configured when RoCE is enabled?
- A. IB
- B. ETS
- C. TCP
- D. PFC
Answer: B,D
Explanation:
When RDMA over Converged Ethernet (RoCE) is enabled, Enhanced Transmission Selection (ETS) and Priority Flow Control (PFC) are two key elements that need to be configured. ETS allows for bandwidth allocation among different traffic classes, and PFC provides lossless Ethernet operation for specific traffic classes to support low-latency, high-performance network communication.
References:
* Dell Technologies SONiC documentation
* RDMA over Converged Ethernet Configuration Guide
NEW QUESTION # 22
What are three characteristics of VLAN translation?
- A. VLAN translation is not supported on MC-LAG port channel interfaces.
- B. SVLAN configuration for both Q-in-Q VLAN tunneling and VLAN translation is possible on the same interface.
- 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. Trunk or access ports can be configured as members of any VLANs that are not used as an SVLAN.
Answer: A,B,E
Explanation:
* VLAN translation is not supported on MC-LAG port channel interfaces (A): This is a restriction commonly seen in network configurations involving Multi-Chassis Link Aggregation (MC-LAG) where VLAN translation capabilities are not applied.
* Trunk or access ports can be configured as members of any VLANs that are not used as an SVLAN (B): This ensures that the VLAN configuration on trunk or access ports is flexible and does not overlap with Service VLANs (SVLANs).
* SVLAN configuration for both Q-in-Q VLAN tunneling and VLAN translation is possible on the same interface (E): This allows for complex VLAN tagging and translation configurations to be applied to the same interface, supporting advanced networking scenarios.
References:
* Dell Technologies SONiC documentation
* Dell Networking Configuration Guide
NEW QUESTION # 23
What is a correct use-case scenario for ZTP in Enterprise SONiC?
- A. The user wants multivendor switch deployment.
- B. The user wants to replace a failed unit and use an automatic script.
- C. The user wants single pane of glass monitoring.
- D. The user wants to configure the switch manually using the CLI.
Answer: B
Explanation:
ZTP (Zero Touch Provisioning) is used to automate the configuration of switches, especially useful in scenarios where a failed unit needs to be replaced. By using ZTP, the switch can automatically download and apply the necessary configuration scripts upon boot-up, reducing the need for manual intervention and speeding up the deployment process.
References:
* Dell Technologies SONiC documentation
* Zero Touch Provisioning Guide
NEW QUESTION # 24
What two methods can be used to upgrade or downgrade Enterprise SONiC?
- A. GRUB
- B. MF-CLI
- C. SONiC-CLI
- D. Boot Loader
Answer: 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.
References:
* Dell Technologies SONiC documentation
* SONiC Upgrade Guide
NEW QUESTION # 25
What are two characteristics of route maps in Enterprise SONIC?
- A. They are a series of commands that contain a matching criterion and action.
- B. Each route map clause has the type values of Match. Set. and Act.
- C. Route-map names are not case-sensitive.
- D. The permit or deny clause In route maps permits or rejects the matching routes from being redistributed.
Answer: A,D
Explanation:
Route maps in Enterprise SONIC are used for controlling and modifying routing information. They contain a series of commands with matching criteria and actions. The permit or deny clause within route maps determines whether the matching routes are permitted or denied from being redistributed.
References:
* Dell Technologies SONiC Route Map Configuration Guide
* Dell Networking Configuration Guide
NEW QUESTION # 26
What is the purpose of the write erase boot command option?
- A. Delete the startup and enable zero touch provisioning.
- B. Delete the startup configuration and the management interface configuration.
- C. Remove user-installed packages and tile changes.
- D. Delete the running configuration and all user accounts.
Answer: A
Explanation:
The write erase boot command option deletes the startup configuration and enables zero touch provisioning (ZTP). This is used to reset the switch to its default state and prepare it for automated configuration through ZTP.
References:
* Dell Technologies SONiC Command Reference Guide
* Switch Configuration Guide
NEW QUESTION # 27
A customer must configure a peer link between two switches in the L2 MC-LAG scenario.
SwitchB has already been configured. Configure the peer link on SwitchA.
Use the following configuration information:
MC-LAG domain 1
VLAN 101
Peer link Port-Channel 100
SwitchA IP: 192.168.1.1/24
SwitchB IP: 192.168.1.2/24
MC-LAG system MAC: 00:00:00:11:11:11
The physical ports to connect the peer switch are Eth 1/5 and Eth 1/6 for each switch.
Answer:
Explanation:
see the explanation for all step by step solution with all explanation.
Explanation:
Here are the steps to configure the peer link on SwitchA:
* Enter Configuration Mode:
SwitchA# configure terminal
* Create VLAN 101:
SwitchA(config)# vlan 101
* Create Port-Channel 100:
SwitchA(config)# interface port-channel 100
SwitchA(config-if-po100)# switchport mode trunk
SwitchA(config-if-po100)# switchport trunk allowed vlan 101
SwitchA(config-if-po100)# exit
* Assign Physical Interfaces to Port-Channel 100:
SwitchA(config)# interface ethernet 1/5
SwitchA(config-if-eth1/5)# channel-group 100 mode active
SwitchA(config-if-eth1/5)# exit
SwitchA(config)# interface ethernet 1/6
SwitchA(config-if-eth1/6)# channel-group 100 mode active
SwitchA(config-if-eth1/6)# exit
* Configure MC-LAG Domain 1:
SwitchA(config)# mclag domain 1
SwitchA(config-mclag-domain)# peer-link port-channel 100
SwitchA(config-mclag-domain)# local-ip 192.168.1.1
SwitchA(config-mclag-domain)# peer-ip 192.168.1.2
SwitchA(config-mclag-domain)# system-mac 00:00:00:11:11:11
SwitchA(config-mclag-domain)# exit
* Save Configuration:
SwitchA# write memory
Comprehensive Detailed Step by Step Explanation with References:
* Enter Configuration Mode:
* Begin by entering the global configuration mode to make changes to the switch configuration.
* Create VLAN 101:
* Create VLAN 101 to be used for the MC-LAG peer link communication.
* Create Port-Channel 100:
* Enter the port channel interface configuration mode using interface port-channel 100.
* Set the port channel to trunk mode with switchport mode trunk.
* Allow VLAN 101 on the trunk with switchport trunk allowed vlan 101.
* Exit the port channel interface configuration mode.
* Assign Physical Interfaces to Port-Channel 100:
* Enter interface configuration mode for ethernet 1/5 and assign it to port channel 100 using the channel-group 100 mode active command.
* Exit the interface configuration mode.
* Repeat the same steps for ethernet 1/6.
* Configure MC-LAG Domain 1:
* Enter the MC-LAG domain configuration mode using mclag domain 1.
* Specify the peer link port channel with peer-link port-channel 100.
* Configure the local IP address as 192.168.1.1 using local-ip 192.168.1.1.
* Configure the peer IP address as 192.168.1.2 using peer-ip 192.168.1.2.
* Set the MC-LAG system MAC address using system-mac 00:00:00:11:11:11.
* Exit the MC-LAG domain configuration mode.
* Save Configuration:
* Save the configuration to ensure the changes persist after a reboot using the write memory command.
References:
* Dell Technologies Networking - SONiC
* Dell Enterprise SONiC Deployment Guide
These steps provide a comprehensive guide to configure the peer link for an MC-LAG scenario on SwitchA, ensuring the specific requirements for IP addressing, VLAN configuration, and port channel setup are met.
NEW QUESTION # 28
What are the supported modes for the QSFP28 ports on an S5248F?
- A. 1x200G, 1x100 G, 1x40 G, and 4x25 G
- B. 1x100G, 1x40 G, 4x25 G, and 4x10 G
- C. 1x100G, 1x40 G, 2x50 G, and 4x25 G
- D. 1x400G, 2x200 G, 4x25 G. and 4x10 G
Answer: C
Explanation:
The QSFP28 ports on an S5248F switch support multiple modes, including 1x100G, 1x40G, 2x50G, and
4x25G. These modes provide flexibility in network design and enable the switch to support different types of network connections and bandwidth requirements.
References:
* Dell S5248F Switch Data Sheet
* Dell Technologies InfoHub
NEW QUESTION # 29
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