A network administrator is configuring frame relay subinterfaces on r1. The router can communicate with a noncisco frame relay switch. As a ccna candidate you are familiar with the concept of framerelay, although you do not need to configure the framerelay switch. Cisco supports three types of lmis link management interface. Connecting cisco router to dsl modem with isp configurations duration. However, cisco frame relay solutions guide is a useful design, implementation, and configuration guide for networking professionals of all levels. With multipoint frame relay configuration a new problem arises, the interface in the frame relay switch now has multiple path through the fr network. For this lab were used 5 cisco routers with ios version 15. In many cases, frame relay is more efficient than x. Ours is pretty straightforward we have a simple hubandspoke network r1r2r3 as well as a pointtopoint connection r1r4. Your router sends an arp request to the remote router while remote router responds with an arp reply the request cant be disabled with no framerelay inversearp, it only disables the reply on this case, the remote router needs to stop responding to arp request, hence in a proper configuration, both routers must have inversearp disabled if you dont want.
Configure frame relay multi point on cisco router youtube. Cisco supports two types of frame relay encapsulation. Cisco icnd2 troubleshoot nat implementation issues. Cisco framerelay switch configuration framerelay requires a framerelay switch that switches one dlci to another, creating a virtual circuit. These are the configuration on routers between r1 and r2. How to configure a cisco router as a frame relay switch.
Configure frame relay for the cisco ccna part 1 youtube. Each line describes how to get to other networks using dlcis. Foresight must be configured explicitly on both the cisco router and the cisco switch. Next we need to setup the frame relay section of the cloud. Configuring a cisco router as frame relay switch networkur. A common basic configuration for a ccna practice lab is three routers that serve as production routers, and a 4th router configured as a frame relay switch. Try to configure the router 1, 2 and 3 with static routing or rip routing in order to communicate with each others if your lab wont work correctly, download the configured frame relay lab which work perfectly and troubleshoot frame relay. Configure the ip addresses as specified in the topology picture on pointtomultipoint subinterfaces. Our network in this example is configured as illustrated in the figure below. Notice that the pvc between chicago and toronto is a pointtopoint interface. Frame relay is one of the most popular wan service deployed over the past decade.
Frame relay user guide for routing devices techlibrary. The cisco ios xe frame relay implementation currently supports routing for ipv4, ipv6, and multiprotocol label switching mpls. You can also try this on live routers and other network simulators. This tutorial explains how to configure frame relay step by step. Pointtopoint is the simplest form of framerelay configuration. The former is often used to connect two cisco routers while the latter is used to connect a cisco router to a noncisco router. As the name suggests, this technology means relaying the frames from one frame relay switch to the other. What is the purpose of applying the command framerelay map ip 10.
We need full reachability between all of these routers, so its time to add in some ospf. Configuring the encapsulation on a physical interface. The following is basic hub and spoke framerelay switch configuration using a 2520, but a 2610 or 3620 with a nm4 or 8as module installed would work as well, only the serial. Understanding frame relay interface encapsulation, configuring the frame relay encapsulation on a physical interface, configuring the frame relay encapsulation on a logical interface, example. Begin by configuring the router as a frame relay switch. Read the wikipedia article to learn more about frame relay. Having looked at both frame relay concepts and an example of the communication process, lets take a look at configuring a cisco router to use frame relay. Configuring cisco routers from frame relay to t1 solutions. In case of any problem regarding to fram relay configuration on cisco devices, ask your. The frame relay map statement on the r3 router for the pvc to r2 is configured with an incorrect dlci number.
When you are connecting a cisco router with a noncisco router, use ietf as the encapsulation method. I removed keepalives and am using the same dlci in framerelay. The same hub and spoke topology is used, only the frame relay switch router configuration is explained here refer the previous article for the hub router and spoke. Since you are working your way to becoming the ultimate networking guru, you are prepared to do a full framerelay config. Even though several advanced technologies such as vpn, atm are available today, frame relay still rocks and will be in near future due to its features, benefits and lower cost in comparison with other point to point wan services. Basic concepts of frame relay explained in easy language. To get these commands to work, you have to clear the inverse arp first. You can configure multiple point to point subinterfaces using a single physical frame frame circuit.
Configure all routers to use framerelay encapsulation. Which statement is a correct deduction from the frame relay configuration that is shown. Foresight is enabled on the cisco router when frame relay traffic shaping is configured. This article will explain frame relay configuration in cisco packet tracer. Cisco icnd2 configure and verify frame relay on cisco. I think the last screenshot might need some explaining. If a framerelay dlci attains a state other than active meaning inactive or deleted, you can check the framerelay configuration to make sure its configuration matches the configuration of the router acting as the framerelay dte device. This is a completely different solution than the first frame relay configuration example. These are provided typically by an isp, however if you are studying for your ccna exam a foundation knowledge of how these work is required. Disable frame relay inverse arp and make sure to configure the correct frame relay mappings. Normally you dont really have to think about the framerelay switch since this is something that the service provider will configure. How to configure frame relay on cisco router technig.
How to configure frame relay in cisco packet tracer. Configuring pointtopoint frame relay links free ccna. Configuring a cisco router as a frame relay switchstep description commandstep enable frame relay switching. This is because r2 connects with r1 and r3 via pointtopoint interfaces and they use separate subnets. Find answers to configuring cisco routers from frame relay to t1 from the expert community at experts exchange. This lab will discuss and demonstrate the frame relay point to point subinterface configuration and.
The first two lines use serial 0 as the starting point. So for example dlci 122 could will go between r1 to r2 which could be located in nyc and san francisco as dlci 123 goes between routers r1 and r3, which r3. When configuring frame relay i always pick one router and use it as the starting point. Frame relay is a layer two protocol that connects networks over long distances. Both frame relay beginners, who need to understand the technology, and advanced readers, who need information on the wide range of frame relay features cisco offers, will benefit from this book. The previous article on configuring frame relay on cisco packet tracer explains it on a simulator, in this article ill show how a cisco router can be used as a frame relay switch. Frame relay will assign each frame exiting the egress interface of a customer edge router a dlci which identifies which path the frame is to travel once it reaches the provider edge router. In this lab we will setup a frame relay point to multipoint topology on cisco routers by using gns3. Actually under multipoint interface you can issue the framerelay interfacedlci 110 command, but this will not help too much. Troubleshoot problems with framerelay circuits on your cisco router by david davis ccie in networking on july 21, 2005, 12. Configuring a cisco router as a frame relay switch cisco frame.
Troubleshoot problems with framerelay circuits on your. Ospf over framerelay presents some unique challenges, depending on just how your framerelay network is architected. It works over dlci to switch the framerelay packets from one framerelay switch to the other. Ensure you can ping both routers from router cinderella. Hi all, in this article we will configure a cisco router to act as a frame relay switch. As you see the configuration is different from the pointtopoint interface. Configuring pointtopoint frame relay subinterfaces. Steps for configuring a cisco router as a frame relay switchtable b1 defines the steps to configuring a cisco router as a frame relay switch. In the previous frame relay pointtopoint subinterface lab we have set up layer 2 connection via frame relay but only adjacent routers can ping each other. For example r1 can ping r2 and r2 and ping r3 but r1 cannot ping r3. Jonathan chin dicussess basic frame relay operations on cisco routers in a routerbased frame relay network. To demonstrate comunication through frame relay switch we connected to it two end devices routers in our case, we configured them with their ip addresses and prepared to support frame relay encapsulation on interfaces connected to fr switch. Foresight allows cisco frame relay routers to process and react to foresight messages and adjust vc level traffic shaping in a timely manner.
The framerelay switching command enables frame relay switching globally on a router, allowing it to forward frames based on the incoming dlci rather than an ip address. This type of configuration can be used between hub and spoke sites where you would want to keep the spokes in their own layer 3 subnets. If you have a cisco router on one side of the link and a. Remember that we have disable lmi in the first steps. The router is using a cisco proprietary encapsulation. Frame relay is an industrystandard, switched data link layer protocol that handles multiple virtual circuits using highlevel data link control hdlc encapsulation between connected devices. Cisco icnd2 configure and verify frame relay on cisco routers. Because of this the router interface configuration must statically match the remote ip address.
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