Intervlan routing allows communication between virtual lans. Configuring an intra and inter vlan on a cisco switch. Routeur isr 2800 qui execute le logiciel cisco ios version 12. Initiate a ping from an end device in one vlan to the interface vlan on another vlan in order to verify that the switch routes between vlans. A virtual local area network vlan is a network technology used to logically separate large broadcast domains using layer 2 devices. Inter vlan routing between 2 switches cisco spiceworks. The information in this document was created from the devices in a specific lab environment.
Configuring the vlan trunking protocol vtp what is vlan. This tagging information allows vlans to be multiplexed over a trunk link through an external encapsulation method isl. The use of vlan 1 for management can cause potential issues for the management of switches, as the second tip explains. After ip addresses are assigned to the interfaces on the l3 device, the routing table has directly connected routes for all vlans, and intervlan routing is enabled. Vlan virtual lan and vtp vlan trunking protocol vlan replication protocol. The interswitch link isl is a cisco proprietary trunking protocol used to interconnect two vlancapable devices connected at fast ethernet or higher. Be aware that this can create security holes if all traffic is supposed to go via the other device that may be implementing security policies. 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. The following is the connectivity of the switch the image. As other have stated, either have the router per from the inter vlan routing or thel3 switch 2960 but not both.
Configuring intervlan routing objective l create a basic switch configuration and verify it. This tutorial explains how to configure intervlan routing on cisco routers. Understanding vlans and routed vlan interface in cisco switch. Intervlan routing configuration guide hewlett packard. If you test the pcs, they can ping with each other within a vlan but not with other vlans. The first part of the tutorial explains how to configure vlan on the switch and the second part explains how to configure intervlan routing on a router.
Interswitch link isl a way of explicitly tagging vlan information onto an ethernet frame. Also created the trunk on the switch that connects to the lan interface of the fortinet, made a switchport access and assigned switchport access vlan to it. My config involves intervlan routing, which is routing from one vlan to another within the layer 3 switch itself. Cisco ccnp switch intervlan routing certificationkits. Introduction au routage intervlan introduction au routage intervlan 3 2. Inter vlan routing by layer 3 switch geeksforgeeks. Tutorial hp switch intervlan routing configuration. Moreover, a cisco asa firewall will provide internet connectivity for all internal subnets. Cisco ccnp switch implementing intervlan routing cisco ccnp switch router on a stick. Intervlan routing multilayer switching a multilayer switch can perform both layer two switching as well as intervlan routing.
So you can deploy inter vlan routing in parallel with the other box but dhcp clients will not use it unless they add a route in the os shell pointing to the l3 switch ip address in their subnet. Vlans and ip routing on an cisco switch and router. Verify that the vlans created on s2 have been distributed to s1. Configure fa01 through fa05 as trunking ports, and designate vlan 99 as the native vlan for these trunks. The only way to provide inter vlan routing on a layer 2 switch is to have a layer 3 switch or router in the network which will receive the packets for each layer2 vlan. 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. Pour configurer les vlan, entrez les commandes suivantes. For the love of physics walter lewin may 16, 2011 duration. We can do this 1,000 times on most cisco switches, which saves thousands of dol. Configure intervlan routing on cisco router jesins blog. Configuring a vlan with voice over ip voip cisco s 3layered architecture. How to configure intervlan routing on cisco routers and switches home.
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. 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. Routage inter vlan cours routage inter vlan pdf, 201. Configuration dun switch niveau 3 avec routage inter vlan duration. Vlanone broadcast domainone subnet 0 to 4095 available vlans 3. While i spend a considerable amount of time walking through the lowlevel details here, cisco thinks it is really important. All ports in catalyst switches default to vlan 1, and any devices that connect to nonconfigured ports are in vlan 1. Finally, the lab is ready to configure intervlan routing. Configuration dun switch niveau 3 avec routage inter vlan youtube. In this cisco configuration example, we will configure inter vlan routing on a cisco switch and a cisco router. Use the interface range command in global configuration mode to simplify this task. Rquiremet is vlan 1 and 2 shud be able to access the internet. Router on a stick is an uncommon configuration however you must understand the technology concepts to become a great network engineer. You can easily understand the legacy inter vlan routing, router on a stick and inter vlan routing using layer 3 switch.
Describe the three primary options for enabling intervlan routing. Users are only able to communicate within the same vlan unless intervlan routing is used. On catalyst switches it is accomplished by the creation of layer 3 interfaces switch virtual interfaces. This means that any traffic from vlan 10 to vlan 20 for example will go to the router, be routed from the fe00. The information in this document is based on a catalyst 355048 that runs cisco ios software release 12. A trunk only passes vlan information over, ieee standard states that a 4 byte addition is added to the header of each packet leaving a device via a trunk that identifies the vlan, when it is received by the other device and enters the trunk, the 4 byte addition is read and removed and the packet is then forwarded to the vlan using the destination mac address. How to configure a cisco layer 3 switchintervlan routing. How to configure intervlan routing on cisco routers and. Configure trunking ports and designate the native vlan for the trunks. Packet tracer, activite, maquette, cisco, sousinterface, port 802. Vlans on catalyst switches for the specific cisco ios version you run on the switch. Configure intervlan routing on layer 3 switches cisco.
Learn how to perform the hp switch inter vlan routing configuration using the web interface in 5 minutes or less. Configure the list of vlans that are allowed on the trunk port. A vlan switch inside a switch is a single broadcast domain. Its not necessary to enable it on the interface of the switch to pc.
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