Most Recent Dell EMC D-SNC-DY-00 Exam Questions & Answers

Network Topology Analysis:

PC1 is on VLAN 10 with an IP address in the 192.168.10.0/24 subnet.

PC2 is on VLAN 20 with an IP address in the 192.168.20.0/24 subnet.

The network uses OSPF for routing between the switches.

The OSPF area is 0, and all switches have loopback interfaces for OSPF.

Routing Table Examination (from switch1):

The show ip route command output from switch1 provides a detailed look at the routing table.

Routes to the 192.168.10.0/24 network (directly connected via Vlan10) are present.

No routes to the 192.168.20.0/24 network are listed in switch1's routing table.

For PC1 to communicate with PC2, switch1 must have a route to the 192.168.20.0/24 network.

The absence of a route to the 192.168.20.0/24 network in switch1's routing table means that switch1 cannot forward packets destined for 192.168.20.0/24.

Therefore, any ping from PC1 to PC2 will be unsuccessful as switch1 does not know how to route packets to PC2's network.

Verification with Dell SONiC:

In Dell SONiC environments, OSPF is configured to ensure dynamic routing.

The configuration must include all necessary networks for inter-switch routing.

If a network (like 192.168.20.0/24) is not included in OSPF configurations on switch1, routes to that network will not be advertised or learned, leading to failed connectivity tests like the ping from PC1 to PC2.

Dell Enterprise SONiC Deployment Guide

Dell Technologies Networking - SONiC

Topic 2, SIMULATION / Lab based

Here are the steps to configure the required port channel and VLAN settings on Switch A:

Enter Configuration Mode:

SwitchA# configure terminal

Create Port Channel 10:

SwitchA(config)# interface port-channel 10

SwitchA(config-if-po10)# switchport mode trunk

SwitchA(config-if-po10)# switchport trunk native vlan 1

SwitchA(config-if-po10)# switchport trunk allowed vlan 1,10

Assign Interfaces Eth 1/11 and Eth 1/12 to Port Channel 10:

SwitchA(config)# interface ethernet 1/11

SwitchA(config-if-eth1/11)# channel-group 10 mode active

SwitchA(config-if-eth1/11)# exit

SwitchA(config)# interface ethernet 1/12

SwitchA(config-if-eth1/12)# channel-group 10 mode active

SwitchA(config-if-eth1/12)# exit

Configure Interface Eth 1/1 for Server Connection:

SwitchA(config)# interface ethernet 1/1

SwitchA(config-if-eth1/1)# switchport mode trunk

SwitchA(config-if-eth1/1)# switchport trunk native vlan 1

SwitchA(config-if-eth1/1)# switchport trunk allowed vlan 1,10

SwitchA(config-if-eth1/1)# end

Save Configuration:

SwitchA# write memory

Comprehensive Detailed Step by Step Explanation with Reference:

Enter Configuration Mode:

Start by entering the global configuration mode to make changes to the switch configuration.

Create Port Channel 10:

Enter the port channel interface configuration mode using interface port-channel 10.

Set the port channel to trunk mode with switchport mode trunk.

Specify VLAN 1 as the native VLAN (untagged) using switchport trunk native vlan 1.

Allow VLANs 1 and 10 on the trunk with switchport trunk allowed vlan 1,10.

Assign Interfaces Eth 1/11 and Eth 1/12 to Port Channel 10:

Enter interface configuration mode for ethernet 1/11 and ethernet 1/12.

Assign each interface to port channel 10 using the channel-group 10 mode active command.

Exit the interface configuration mode.

Configure Interface Eth 1/1 for Server Connection:

Enter interface configuration mode for ethernet 1/1.

Set the interface to trunk mode with switchport mode trunk.

Specify VLAN 1 as the native VLAN using switchport trunk native vlan 1.

Allow VLANs 1 and 10 on the trunk with switchport trunk allowed vlan 1,10.

Exit the configuration mode.

Save Configuration:

Ensure the configuration is saved so it persists after a reboot using the write memory command.

Dell Technologies Networking - SONiC

Dell Enterprise SONiC Deployment Guide

These steps provide a comprehensive guide to configure a port channel and VLAN settings on Switch A to meet the specified requirements for server and trunk connections.

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.

Dell Technologies SONiC documentation

OSPF Configuration Guide

Dell SONiC Management Interface Configuration:

In Dell SONiC, the management port configuration is a crucial aspect that allows administrators to access and manage the network device.

The management interface typically provides out-of-band management access to the device, ensuring that even if the data network is down, the management network can still be accessed.

Common Interface Naming Conventions:

mgmt 1/1/1: This naming convention is not typically used in Dell SONiC environments for management interfaces.

ma 0/1: This could be a potential naming convention but is not standard for Dell SONiC.

Management 0: This is a logical name but does not align with the standard interface naming conventions used in Dell SONiC.

eth0: This is the standard naming convention used for the primary management interface in most Linux-based systems, including Dell SONiC.

Verification with Dell SONiC Documentation:

Dell SONiC documentation specifies that the management interface is usually named eth0.

When accessing the management interface within the MF-CLI (Management Framework Command Line Interface) environment, eth0 is the correct interface to configure.

Practical Configuration Example:

When configuring the management port, the command might look something like:

config interface ip add eth0 <management_ip_address>/<subnet_mask>

This command specifies the management interface eth0 and assigns it an IP address for network management purposes.

Dell Enterprise SONiC Deployment Guide

Dell Technologies Networking - SONiC

This detailed step-by-step explanation confirms that the correct answer is D, providing insights into the typical interface naming conventions and configuration practices within the Dell SONiC environment.

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.

Dell Networking SONiC: How to Configure Port Channels

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