This chapter discussed in detail Layer 3 routing and its implementation, including coverage of inter-VLAN routing and router-on-a-stick, DHCP services, and the forwarding path of multilayer switching using CEF. | Chapter 4: Implementing Inter-VLAN Routing CCNP SWITCH: Implementing IP Switching 1 Cisco Networking Academy Program CCNP SWITCH: Implementing IP Switching Chapter 4: Implementing Inter-VLAN Routing Chapter 4 Objectives Explain methods of inter-VLAN routing. Configure and verify inter-VLAN routing in a Layer 2 topology using multilayer switching. Explain DHCP operation and configure DHCP. Configure and verify inter-VLAN routing in a Layer 2 topology using CEF-based multilayer switching. 2 Chapter 4 Objectives Describing Inter-VLAN Routing When a network architect hands off a design, switches at the distribution layer, or in a collapsed core, will almost certainly have multiple VLANs connected to them. A switch with multiple VLANs requires a means of passing Layer 3 traffic between those VLANs. This section describes the process and the various methods of routing traffic from VLAN to VLAN. A router that is external to the Layer 2 switch hosting the VLANs can perform inter-VLAN . | Chapter 4: Implementing Inter-VLAN Routing CCNP SWITCH: Implementing IP Switching 1 Cisco Networking Academy Program CCNP SWITCH: Implementing IP Switching Chapter 4: Implementing Inter-VLAN Routing Chapter 4 Objectives Explain methods of inter-VLAN routing. Configure and verify inter-VLAN routing in a Layer 2 topology using multilayer switching. Explain DHCP operation and configure DHCP. Configure and verify inter-VLAN routing in a Layer 2 topology using CEF-based multilayer switching. 2 Chapter 4 Objectives Describing Inter-VLAN Routing When a network architect hands off a design, switches at the distribution layer, or in a collapsed core, will almost certainly have multiple VLANs connected to them. A switch with multiple VLANs requires a means of passing Layer 3 traffic between those VLANs. This section describes the process and the various methods of routing traffic from VLAN to VLAN. A router that is external to the Layer 2 switch hosting the VLANs can perform inter-VLAN routing. In addition, Cisco Catalyst multilayer switch can be used to perform both intra-VLAN frame forwarding and inter-VLAN routing. We focus on the following in this section: Introduction to inter-VLAN routing Inter-VLAN routing with an external router Inter-VLAN routing with switch virtual interfaces Routing with routed ports 3 Introduction to Inter-VLAN Routing VLANs isolate traffic by design. Inter-VLAN router of some sort required. Inter-VLAN routing should occur in the distribution layer. Multilayer switch is recommended to terminate VLANs. Because VLANs isolate traffic to a defined broadcast domain and subnet, network devices in different VLANs cannot communicate with each other natively. As shown in the figure, the devices in different VLANs cannot communicate without any Layer 3 device. The devices in each VLAN can communicate to the network devices in another VLAN only through a Layer 3 routing device, referred to as an inter-VLAN router. Cisco recommends the implementation of .
