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To improve security, it would be better to create another VLAN as the native VLAN that will remain unused, but to simplify this lab, it is not covered. Protocols like STP, DTP, and UDLD should be the only rightful users of the native VLAN and their traffic should be completely isolated from any data packets.” For this reason, the management VLAN is not the native VLAN in this lab. If you are using a Layer 2 switch (such as a Cisco Catalyst 2950 or 2960), the command is not needed and will be rejected.Ĭisco recommends in the “VLAN Security White Paper,” to prevent a double-encapsulated 802.1Q/nested VLAN attack, “always pick an unused VLAN as the native VLAN of all the trunks don’t use this VLAN for any other purpose. Layer 3 switches (such as the Cisco Catalyst 3560) require that the trunking protocol be specified with the switchport trunk encapsulation command before the interface can be set as a trunk. SwPod x(config-vlan)# exit Step 3-2: Configure the Trunk PortĬonfigure the trunk port that connects the switch to the router. Step 3-1: Create the VLANsĬreate and name VLANs for data, voice, and network management. SwPod x(config-line)# exit Task 3: Configure the Switchįor the purposes of security and ease of implementing quality of service (QoS), use VLANs to keep voice traffic separate from other traffic. SwPod x(config-line)# logging synchronous (In a production environment, this could be a security risk.) Step 2-2: Configure Basic Setup on the Switch Switch(config)# hostname SwPod xįor example, Pod 3 would use hostname SwPod3 SwPod x(config)# no ip domain-lookup It allows 120 minutes of inactivity before logging you out. The exec-timeout command shown here is useful in a lab setting. Step 1-2: Cable Router and SwitchĬable router interface Fast Ethernet 0/0 to switch port Fast Ethernet 0/1, as shown in Figure 3-1. Step 1-1: Clear Prior ConfigurationsĬlear any prior configuration on the router and switch, and delete the vlan.dat file before reloading both devices. Task 1: Clear and Cable Devicesīecause the CCNA is a prerequisite for the CCNA-Voice certification exam, this book assumes that you are familiar with clearing prior configurations. Wherever an x is shown, substitute the pod number. These instructions refer to the Pod Addressing Table in Appendix A to determine the IP addresses and VLAN numbers used for your pod. SOI would like to establish its new data network with the expectation of using VoIP in the near future. Configure router-based DHCP pools for voice and data devices.Configure VLAN trunking between a router and a switch using subinterfaces.
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Upon completion of this lab, you will be able to