Notice the informational messages showing the line protocol on both SVIs changed to up. The IP addresses that are configured will serve as the default gateways to the hosts in the respective VLANs. Configure the SVI for VLANs 10 and 20, as shown in Example 4-14. Example 4-13 Create the VLANs D1(config)# vlan 10 First, create the two VLANs as shown in Example 4-13. The Layer 3 switch will provide inter-VLAN routing services to the two hosts. PC1 is in VLAN 10, and PC2 is in VLAN 20, as shown. In Figure 4-6, the Layer 3 switch, D1, is connected to two hosts on different VLANs. A Layer 3 SVI must be created for each of the routable VLANs. SVIs are configured using the same interface vlan vlan-id command used to create the management SVI on a Layer 2 switch. To provide inter-VLAN routing, Layer 3 switches use SVIs. A routed port is similar to a physical interface on a Cisco IOS router. Route from one VLAN to another using multiple switched virtual interfaces (SVIs).Ĭonvert a Layer 2 switchport to a Layer 3 interface (that is, a routed port). Layer 3 switches are also commonly implemented in enterprise distribution layer wiring closets.Ĭapabilities of a Layer 3 switch include the ability to do the following: Layer 3 switches use hardware-based switching to achieve higher-packet processing rates than routers. However, a large enterprise requires a faster, much more scalable method to provide inter-VLAN routing.Įnterprise campus LANs use Layer 3 switches to provide inter-VLAN routing. Inter-VLAN routing using the router-on-a-stick method is simple to implement for a small- to medium-sized organization. In these very large networks, network administrators use Layer 3 switches to configure inter-VLAN routing.
Modern enterprise networks rarely use router-on-a-stick because it does not scale easily to meet requirements. Layer 3 Switch Inter-VLAN Routing (4.3.1) In this section, you configure inter-VLAN routing using Layer 3 switches. Inter-VLAN Routing using Layer 3 Switches (4.3)
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