Inter vlan routing configuration on layer 3 switch pdf

Layer 3 intervlan routing configuration on 300 series managed. The catalyst 4500 series switch supports inter vlan. On a multilayer switch, a logical layer 3 interface can be configured for any vlan. Configure interface f06 and f011 as access ports and assign vlans. The catalyst 4500 series switch supports intervlan routing by integrating the routing and. Each vlan has a layer 3 address that should be configured as default gateway address on all its devices. Applicable devices 300 series switches stepbystep procedure prerequisites 1. Inter vlan routing by layer 3 switch geeksforgeeks. In this lab, you will set up one router with two switches attached via the router gigabit ethernet interfaces. Configure inter vlan routing using layer 3 switching.

Troubleshoot common ip addressing issues in an intervlanrouted environment. Pdf how to configure intervlan routing on layer 3 switches. Ill finish this chapter by demonstrating how you can make intervlan communication happen by introducing a router into a switched network. View lab a20 configure layer 3 switching and intervlan routing. Cisco catalysts l3 switches can work as layer 3 devices with full routing capabilities. Configure interfaces f06 and f011 as access ports and assign vlans. Problems configuring intervlan routing with a layer 3 switch. Whenever hosts in one vlan need to communicate with hosts in another vlan, the traffic must be routed between them. On the ipv4 routing screen, select the create tab on the top of the screen. The problem is that no run config inside the switch. The layer 3 switch will be responsible for routing the packets between 192. Layer 3 switching operation and configuration intervlan routing with switch virtual. Multilayer switch intervlan routing multilayer switches can perform layer 2 and layer 3 functions, replacing the need for dedicated routers. Correct, you configure the firewall with nat and let it route traffic to the layer3 switch and the switch takes it from there.

If the firewall is configured with a vlan interface for this. How to configure intervlan routing on layer 3 switches document id. This link shows you step by step configuration to create the objects, nat poll and nat rules. However, vlan enabled switches cannot, by themselves, forward traffic across vlan boundaries. Layer 3 interfaces are used to forward ipv4 and ipv6 packets using static or dynamic routing protocols. A traditional network requires a physical interface from a router to a switch to perform intervlan routing. Use the interface range command in global configuration mode to simplify this task. Configuring intervlan routing with a layer 3 switch and. For example, you could have ports 1 through 10 of switch a assigned to vlan 100, and ports 11 through 20 of switch a assigned to vlan 200. This document discusses the vlan protocol and provides stepbystep instructions for configuring vlan routing using the dell powerconnect 6024 and powerconnect 33xx switches.

When designing a network with a layer 3 switch at the distribution layer, it is very important to understand which device is set as the gateway for clients on each subnet. On catalyst switches it is accomplished by the creation of layer 3 interfaces switch virtual interfaces svis. Layer 2 switches cannot forward traffic between vlans without the assistance of a router. If switch a and switch b share a highspeed link, then switch b could also have ports assigned to the same vlans as switch a. Of course, well configure our familiar switched network layout we used in the last chapter for creating vlans and for implementing trunking and intervlan routing on a layer 3 switch by creating switched.

This configuration might look familiar if you worked with layer 2 switches before. This example shows how to configure the logical layer 3 vlan interface vlan 2 and assign an ip address. How to configure a cisco layer 3 switchintervlan routing. Step instructions verify troubleshoot troubleshooting procedure related information introduction vlans divide broadcast domains in a lan environment. Tutorial hp switch intervlan routing configuration. A layer 3 device such as a router or layer 3 switch are needed to provide routing between the vlans. Routeronastick an intervlan routing configuration that allows a single router to move data between vlans by using a fastethernet interface divided into subinterfaces that is connected to a switch. Moreover, you can configure also a switch vlan interface svi with the interface vlan command which acts as a virtual layer 3 interface on the layer3 switch. Note before you can configure logical layer 3 vlan interfaces, you must create and configure the vlans on the switch, assign vlan membership to the layer 2 interfaces, enable ip routing if ip routing is disabled, and specify an ip routing protocol. With a multilayer switch, traffic is routed internal to the switch device. Any device that supports layer 3 routing, such as a router or a multilayer. Next step is to create a svi for vlan 10 and 20 and configure ip addresses on them. Multilayer switches support dynamic routing and intervlan routing.

The document provides a sample configuration for intervlan routing with a catalyst 3550 series switch that runs enhanced multilayer image emi software in a typical network scenario. Whenever hosts in one vlan need to communicate with hosts in another vlan, the traffic must be routed. Lab a20 configure layer 3 switching and intervlan routing addressing. The example below will explain how to configure layer 2 vlans, layer 3 switch virtual interfaces and layer 3 intervlan routing using nexus switches. Pdf packet tracer configuring routeronastick inter. Intervlan routing is a process for forwarding network traffic from one vlan to another, using a router. If you have asdm installed, you can use it to do dynamic nat.

This routing process is a suitable and scalable solution. The multilayer switch must have ip routing enabled. Configure inter vlan routing on cisco router and layer 3. The supported types of layer 3 interfaces are shown as below.

A switch virtual interface svi exists for vlan 1 by default. Issue the show vlan brief command to verify vlan configuration. Router on a stick layer 2 switch trunks traffic to external layer 3 router legacy. Without making any config changes on the access layer switch, i was still able to ping between the printer and the layer 3 switch, without issue. Configure intervlan routing using layer 3 switching. One of the benefits of legacy intervlan routing is ease of configuration. Vlans are created at the core layer on these switches and intervlan routing is configured according to the companys requirements. Layer 3 routed ports are normally implemented between the distribution and the core layer. This allows all intervlan traffic to be carried to and from the routing device on a single trunk.

On catalyst switches it is accomplished by creating layer 3 interfaces switch virtual interfaces svi. You can use layer 3 interfaces for ip routing and intervlan routing. For additional information on how to enable layer 3 mode on firmware version 1. Svis are configured using the same interface vlan vlanid command used to create. This should work since whatever comes in on that accessport would be treated as a member of vlan 30 on fa022. Layer 3capable switch, is connected to a lan switch with multiple physical connec.

A traditional network requires a physical interface from a router to a switch to perform inter vlan routing. On this post i will describe a scenario with a layer3 switch acting as inter vlan. If you forget this your switch wont build a routing table. Vlans divide broadcast domains in a lan environment. Note that i have published a similar scenario in the past which depicts how to implement intervlan routing using regular ios switches in the article here. From a host on any vlan, im able to ping its associated svi and the layer3 port which i created via the no switchport command but im unable to ping the router interface which faces the switch. Configuring intervlan routing with catalyst 375035603550. I have created vlans 2 and 3, fa01 ports have been configured as trunk ports, fa02 ports have been configured as access ports in the corresponding vlan.

Now, i am presenting the configuration of the layer 3 switch. No special voice vlan configuration means its just an accessport. In router on a stick method, both switch and router are needed but while using layer 3 switch, a single switch will perform intervlan routing as well as the layer 2 functions vlan, therefore this method is cost effective and also less configuration is needed. Configure trunking ports on switches and designate the native vlan for the trunks. The catalyst 4500 series switch supports intervlan. Troubleshoot common intervlan configuration issues. On this post i will describe a scenario with a layer3 switch acting as inter vlan routing device together with two layer2 switches acting as closet access switches. Intervlan routing works find but a problem arises when i try to ping the router from a host on my vlans. To configure logical layer 3 vlan interfaces, perform this task. This chapter introduces the configurations for layer 3 interfaces. The above asa sample configuration shows the necessary static routing required on the asa to route packets back to vlan10 10. The objective of this document is to configure layer 3 intervlan routing on 300 switches. How to configure l2 and l3 intervlan routing on cisco. With default configuration we need two physical interfaces on router to make this intra vlan communication.

These layer 3 switches are usually found at the core network layer, interconnecting all other layer 2 switches, providing secure access to all vlan networks according to the companys security policy. Any device that supports layer 3 routing, such as a router or a multilayer switch, can be used to perform the necessary routing functionality. Switching, routing, and wireless essentials companion. Layer 3 capable switch, is connected to a lan switch with multiple physical connec. For intervlan communication, a layer 3 router is required. Configure fa0 3 through fa04 as trunking ports, and designate vlan 99 as the native vlan for these trunks. Configuration of inter vlan routing on a cisco layer 3 switch. To provide intervlan routing, layer 3 switches use svis. Router on a stick layer 2 switch trunks traffic to external layer 3 routerlegacy.

Intervlan routing a vlan is a broadcast domain, so computers on separate vlans are unable to communicate without the intervention of a routing device. People ask me the question if you can route traffic between vlans on layer 2 switches. If you need to create a default route, access the network menu and select the ipv4 routing option. How to configure a cisco layer3 switchintervlan routing without. If the l3 switch is the gateway for clients downstream subnets, any upstream firewall must be configured with a static route to that downstream subnet. How to configure a cisco layer 3 switch intervlan routing networks training. Configure intervlan routing on layer 3 switches cisco. Lab a20 \u20 configure layer 3 switching and intervlan.

Intervlan routing with routers and layer 3 switches. The logical layer 3 vlan interfaces provide logical routing interfaces to vlans on layer 2 switches. The document uses a catalyst 2950 series switch and a catalyst 2948g switch as layer 2 l2 closet switches that connect to the catalyst 3550. Lab configuring perinterface intervlan routing solution.