Practise switch scenarios involving SW1, SW2, VLANs, trunk links, allowed VLAN lists and show interfaces trunk output.
Start Scenario PracticeDuring an FCoE deployment, the server team reports that hosts can reach the storage array but performance is intermittent with periodic timeouts. The network team sees no errors on the FCoE VLAN. The DCB configuration on the upstream switch shows that PFC is enabled for CoS 3. What should the engineer check next?
Explanation: D is correct because PFC (Priority Flow Control) must be consistently configured on both ends of an FCoE link to prevent frame loss. If PFC is enabled for CoS 3 on the upstream switch but not on the server's vNIC or the FCoE VLAN interfaces, the lack of lossless behavior causes intermittent timeouts and performance degradation, even if the FCoE VLAN shows no errors.
An engineer needs to extend a Layer 2 VLAN across a VXLAN EVPN fabric. Which construct maps the VLAN to the overlay network?
Explanation: In a VXLAN EVPN fabric, the VNI (VXLAN Network Identifier) is the construct that maps a Layer 2 VLAN to the overlay network. The VNI uniquely identifies a Layer 2 segment across the underlay, allowing VLAN traffic to be encapsulated and transported over the IP fabric. This mapping is configured on the VTEP (VXLAN Tunnel Endpoint) using commands like 'vlan 100' mapped to 'vn-segment 10100' under the VLAN configuration.
A network engineer wants to automate the deployment of VLANs across 50 Nexus switches in a data center. Which approach provides the most consistent and repeatable results with minimal manual effort?
Explanation: Ansible playbook with the nxos_vlan module is the correct choice because it provides idempotent, declarative automation that ensures consistent VLAN configuration across all 50 Nexus switches with minimal manual effort. Ansible handles SSH connectivity and state management natively, eliminating the need for custom scripting and reducing the risk of human error.
A data center engineer is designing a UCS Manager solution that requires VLAN segmentation across multiple fabric interconnects. The network team requires that each VLAN is assigned a unique native VLAN ID per fabric. Which pool configuration supports this requirement?
Explanation: UCS Manager allows separate VLAN pools to be assigned per fabric interconnect, enabling unique native VLAN IDs per fabric. By creating non-overlapping VLAN pools for each fabric, the engineer ensures that each fabric has its own native VLAN ID without conflict, meeting the requirement for VLAN segmentation across multiple fabric interconnects.
An engineer is troubleshooting a DHCP issue in a data center VLAN. Clients are unable to obtain IP addresses from the DHCP server. The switch has DHCP snooping enabled on the VLAN, and the DHCP server is connected to a trusted port. The clients are on untrusted ports. Which additional security feature is most likely causing the problem if the DHCP server is on a different subnet and the switch is not configured as a DHCP relay?
Explanation: When the DHCP server resides on a different subnet and the switch lacks an IP helper address (ip helper-address) configuration, DHCP snooping will not forward the DHCP broadcast from the client to the server. DHCP snooping relies on the switch to relay DHCP packets across subnets; without the helper address, the broadcast is dropped at the VLAN interface, preventing clients from obtaining IP addresses.
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Practice all SW1 and SW2 VLAN Trunking Practice QuestionsPractise switch scenarios involving SW1, SW2, VLANs, trunk links, allowed VLAN lists and show interfaces trunk output. These appear throughout the 350-601 and require you to apply your knowledge, not just recall facts.
Cisco doesn't publish an exact breakdown, but scenario-based questions (especially exhibit and command-output formats) make up a significant portion of the 350-601. Practicing each scenario type ensures you're ready for any format.
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