200-301 Question #1766: Real Exam Question with Answer & Explanation

Question

Lab Simulation 66 Please use the "Tasks" and "Topology" tabs to complete this lablet. Topology Complete the tasks below: Task 1 Configure Sw1 and Sw2 with both VLANS using the naming on the topology. Task 2 - Assign VLANs to the appropriate interfaces from the topology. Ensure ports are set to voice and data as assigned on the topology. Task 3 Configure Sw1 and Sw2 for neighbor discovery using LLDP. Task 4 Disable CDP on Sw1 and Sw2's e0/0 interfaces. Answer: The following commands should be applied to both Sw1 and Sw2. Task 1 & 2: VLANs and Interface Configuration (Data/Voice) These tasks involve creating the specified VLANs (100 and 102) with their names and then configuring the interface range E0/1-3 to support both the Data VLAN (100) and the Voice VLAN (102). ! --- Configuration for Switch 1 (Sw1) and Switch 2 (Sw2) --- configure terminal ! --- Task 1: Configure VLANs and Names --- vlan 100 name Engineering exit vlan 102 name Engineering_Voice exit ! --- Task 2: Assign VLANs to Interfaces E0/1-3 --- interface range Ethernet0/1 - 3 ! Set the port mode to access (to be used by end devices like PCs/Phones) switchport mode access ! Assign the Data VLAN (100) switchport access vlan 100 ! Assign the Voice VLAN (102). This tells the switch to use 802.1Q tagging ! for any traffic it detects coming from a VoIP phone. switchport voice vlan 102 no shutdown exit Task 3: Configure LLDP This task requires enabling the Link Layer Discovery Protocol (LLDP) globally, which is often used in mixed-vendor environments (unlike CDP, which is Cisco proprietary). ! --- Configuration for Switch 1 (Sw1) and Switch 2 (Sw2) --- ! --- Task 3: Enable LLDP Globally --- lldp run end Task 4: Disable CDP on E0/0 This task requires disabling Cisco Discovery Protocol (CDP) specifically on the switch-to-switch link (E0/0), while leaving it enabled globally (or on other interfaces) if not specified otherwise. ! --- Configuration for Switch 1 (Sw1) and Switch 2 (Sw2) --- configure terminal ! --- Task 4: Disable CDP on Interface E0/0 --- interface Ethernet0/0 ! Disable CDP on this specific interface no cdp enable exit end copy running-config startup-config Voice VLAN: The switchport voice vlan 102 command is key. It ensures that traffic from the connected VoIP phone is tagged with VLAN 102 using 802.1Q (QoS enabled), while traffic from the PC connected to the phone's built-in switch remains untagged in the Data VLAN 100. LLDP vs. CDP: You enabled the industry-standard LLDP globally (lldp run) for neighbor discovery, but then explicitly disabled the Cisco-proprietary CDP on the E0/0 interface (no cdp enable). This is common practice for security or administrative purposes.

Options

• taskConfigure Sw1 and Sw2 with VLANs (100 'Engineering' and 102 'Engineering_Voice'), assign these VLANs to interfaces E0/1-3 ensuring they are set for both voice and data, configure neighbor discovery using LLDP, and disable CDP on interfaces E0/0.
• prerequisitesAccess to a simulation environment with network devices Sw1 and Sw2 as per the provided topology information.

Explanation

This simulation requires a multi-step configuration on both switches covering VLAN creation with naming, interface assignment for data and voice VLANs, LLDP enablement, and selective CDP disabling. The correct approach uses 'switchport mode access' with 'switchport access vlan 100' for data and 'switchport voice vlan 102' for voice on interfaces E0/1-3, then 'lldp run' globally and 'no cdp enable' specifically on E0/0 interfaces. Each task builds on foundational switch configuration knowledge, and the commands must be applied consistently to both Sw1 and Sw2 as the topology dictates identical configurations.

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