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Unlike the traditional inter-VLAN routing method, router-on-stick does not require multiple. Most modern inter-VLAN routing implementations are designed using this method. A BDR is also elected in case the DR fails.
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Note: Make sure that the routers and switches have been erased and have no startup configurations. Refer to the Router Interface Summary Table at the end of this lab for the correct interface identifiers. Depending on the model and Cisco IOS version, the commands available and output produced might vary from what is shown in the labs. Other routers, switches and Cisco IOS versions can be used. The switches used are Cisco Catalyst 2960s with Cisco IOS, Release 15.0(2) (lanbasek9 image). (Click on the image to open a larger view. Unless otherwise specified, assume the equipment is connected as shown. Note: The routers used with CCNA hands-on labs are Cisco 1941 Integrated Services Routers (ISRs) with Cisco IOS, Release 15.2(4)M3 (universalk9 image). Our standard CCNA Pod contains 3 Cisco routers and 3 Cisco switches. Test your knowledge by trying to configure the devices without referring to the appendix. You will also implement NAT, DHCP and access lists. In addition, you will configure router-on-a-stick routing between VLANs. The required switch VLAN configuration commands are provided in Appendix A of this lab. Introduction In this practice skills assessment, you will configure the Our Town network with single-area OSPFv2. Note: This lab provides minimal assistance with the actual commands necessary to configure the router and switches. Two separate VLANs will be configured on the switches, and you will set up routing between the VLANs.
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Note - In a cluster, you must select a router ID and make sure that it is the same on all cluster members. Use an address on a loopback interface that is not the loopback address (127.0.0.1). In this lab, you will set up one router with two switches attached via the router Gigabit Ethernet interfaces. This prevents the router ID from changing if the interface used for the router ID goes down.
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One of the benefits of legacy inter-VLAN routing is ease of configuration. A network administrator is using the router-on-a-stick model to configure a switch and a router for inter-VLAN routing. Also, you may encounter per-interface inter-VLAN routing in organizations with very small networks. Legacy inter-VLAN routing is seldom used in today’s networks however, it is helpful to configure and understand this type of routing before moving on to router-on-a-stick (trunk-based) inter-VLAN routing or configuring Layer-3 switching. Part 3: Verify Trunking, VLANs, Routing, and Connectivity Part 2: Configure Switches with VLANs and Trunking Part 1: Build the Network and Configure Basic Device Settings Lab – Configuring Per-Interface Inter-VLAN Routing