DELL D-SNC-DY-00 Practice Test - Questions Answers, Page 4

The exhibit shows a BGP EVPN route in a VXLAN environment. The route type can be determined based on the details provided. Type 2 routes in BGP EVPN are used to advertise MAC address reachability information between VTEPs (Virtual Tunnel End Points). The exhibit indicates a host route from another VTEP, which corresponds to a Type 2 route.

Dell Technologies SONiC documentation

BGP EVPN Configuration Guide

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.

Dell Technologies SONiC documentation

ECMP Configuration Guide

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.

Dell Technologies SONiC documentation

Zero Touch Provisioning Guide

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.

Dell Technologies SONiC Command Reference Guide

Switch Configuration Guide

To route traffic from voice servers to a dedicated Internet link, the following steps are necessary:

Create an ACL that selects IPs of voice servers (B): This ACL will match the traffic coming from the specified IP addresses of the voice servers.

Create a policy-map and attach the configured class-map and set the next-hop IP (D): The policy-map will use the class-map to identify the voice server traffic and then set the next-hop IP for routing.

Attach a policy to the egress interface (C): The policy-map must be applied to the egress interface to ensure that the traffic is routed correctly.

Dell SONiC QoS Configuration Guide

Dell Technologies InfoHub

Feel free to refer to the Dell SONiC documentation and Dell Technologies InfoHub for more detailed explanations and additional context.

When installing Enterprise SONIC from an HTTP server using the Open Network Install Environment (ONIE), the management interface typically used for network installations is eth0. This is the default interface ONIE uses for network connectivity to retrieve installation images and other configuration files.

Dell Technologies SONiC documentation

ONIE User Guide

Entering the qos-mode uniform command on a VTEP interface ensures that the DSCP (Differentiated Services Code Point) value of the payload is copied to the outer header DSCP value. This maintains the Quality of Service (QoS) markings across the VXLAN tunnel, allowing consistent traffic prioritization.

Dell Technologies SONiC documentation

VXLAN and QoS 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.

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