This command enables frame relay switching globally on the router, allowing it to forward frames based on the incoming dlci rather than on an ip address basis. Next, execute the following commands to create a pointtopoint frame relay subinterfaces one for router2 and one for router3, assign an ip addresses, and specify the dlci numbers. 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. Originally designed for transport across integrated services digital network isdn infrastructure, it may be used today in the context of many other network interfaces. After configuring your network, its considered a good idea to verify that your configuration is working. Frame relay is a standardized wide area network technology that specifies the physical and data link layers of digital telecommunications channels using a packet switching methodology. Use the debug framerelay lmi command to verify the operational status of the router and the frame relay switch. Dec 04, 2011 this article will explain frame relay configuration in cisco packet tracer. Nothing too exciting at the moment, but i do want to touch on it. How to configure frame relay in cisco packet tracer jesins. This lab will discuss and demonstrate the frame relay point to point subinterface configuration and. Figure 1527 illustrates how voice and data can be merged to more effectively utilize wan resources. Basic concepts of frame relay explained in easy language.
There are two tables used in frame relay configuration viz. Note frame relay switching is not supported on subinterfaces. You have a physical connection from user a to a framerelay provider switch. Traffic analysis can distinguish frame relay format from lapd by its lack of a control field. Configuring pointtopoint frame relay subinterfaces free. Frame relay is a scalable wide area network solution which makes use of packetmode transmission. Pointtopoint is the simplest form of framerelay configuration. Since you are working your way to becoming the ultimate networking guru, you are prepared to do a full framerelay config. Lets look at a basic frame relay configuration with just two endpoints, headquarters and branch. Pointtopoint is the simplest form of frame relay configuration. You can configure multiple point to point subinterfaces using a single physical frame frame circuit. Specifically it is switching between one dlci to another.
The configuration of the router as a frame relay switch is described in step 2. Frame relay allows for a single serial interface on the router to connect multiple remote sites with the help of virtual circuits. Frame relay is an international data link protocol that defines the capabilities to create a frame switched packetswitched service, allowing dte devices typically routers to send data to many other devices using a single physical connection to the frame relay service. Configuring a cisco router as a frame relay switch cisco. As per this table the packet with dlci number 58 is forwarded to the outgoing interface3 and that having dlci number 25 is forwarded to interfacei.
Configuring frame relay feature history release modification forinformationaboutfeaturesupportinciscoios software,useciscofeaturenavigator. You can go through the basic configuration and verification of the point to point protocol ppp. Is the setup of a router as a frame relay switch configuration the same regardless of whether the spoke routers interfaces or subinterfaces, i should say are 25098. Note that cisco routers can be configured to operate similarly as a frame relay switch as well. Frame relay switching enhancements supported platforms 5 cisco ios release 12. C o n t e n t s widearea networking overview 1 finding feature information 1 frame relay 1 frame relay atm internetworking 4 switched multimegabit data service 4 link access procedure balanced and x. The configuration tasks will be fully explained in a later section. I have two cisco 2610xm with one of them got a serial nm4as 4 serial ports asyncsync and this would be my frs router. Frame relay is a layer two protocol that connects networks over long distances. Frame relay figure 153 frame relay access device local access loop to the service provider network local access loop is the physical wiring that interconnects the customer premise frad and the service provider networks frame relay switch access port. Cisco framerelay switch configuration frame relay requires a frame relay switch that switches one dlci to another, creating a virtual circuit. Bridgingtransmitting nonip traffic or merging two networks. The dlcis are both learned from the frame relay switch through lmi status messages sent from the switch to the router, and both are active which is the desired state. Mar 25, 2015 frame relay is a packetswitching telecommunication service designed for costefficient data transmission for intermittent traffic between local area networks lans and between endpoints in wide area networks wans.
Configure a frame relay switch in part 2, you will configure a frame relay switch. Example 425 shows the sample configurations for the router configured as a frame relay switch. This can be accomplished by using the ping and other troubleshooting methods. As the administrator, you are responsible for configuring frame relay among regional offices. The remaining configurations on the frame relay switch are specific to the interfaces.
Although frame relay is popular due to its relatively inexpensive nature, it is being replaced in many areas by. Remember that pvcs are only oneway circuits, and thus we need to create. 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. In this lesson well take a look at framerelay pointtopoint which is far easier to configure. Cisco the default, and proprietary, framerelay encapsulation ietf the standardized framerelay encapsulation.
First and foremost, we have to ensure that our addressing is correct. Frame relay can easily be configured to combine traffic from different. Normally you dont really have to think about the frame relay switch since this is something that the service provider will configure. My question is how do i connect them physically back to back with a db60 dtedce cable to make them a. Different cisco ios software versions or releases may display slightly different outputs. Jun 07, 2019 the configuration is completed successfully. Frame relay connections are created by configuring network routers or other devices to communicate with a service provider frame relay switch. In preparation of your ccna exam, we want to make sure we cover the various concepts that we could see on your cisco ccna exam. This lab will discuss and demonstrate the configuration and verification of multipoint frame relay interfaces. Onewaytomakethisnetworkworkfullyistocreateafullymeshednetwork networkb,butdoingsorequiresalargenumberofpvcs,whichmaynotbeeconomicallyfeasible.
Congestion control in frame relay basic working mechanisms. There are a couple of options for creating a frame relay topology. On a cisco router configured as a frame relay switch, frames from a frame relay pvc arriving on an incoming interface are switched to a frame relay pvc on outgoing interface. There could also be a virtual channel from user a to user c using the same physical link. Merging and superseding of configuration commands 42. Frame relay switches make decisions based on dlcis, whereas ethernet switches make decisions based on mac addresses.
Posted by rene molenaar july 14, 2010 in frame relay. As the frames are transported across the provider, the framerelay switch will change the dlci values and when the frames are received the dlci value will not be the same as it was when the frame entered the framerelay network, hence the value of a dlci is of a local significance only. When configuring bridging for the traffic between these sites, you would assign the ethernet interface and frame relay subinter faces to the same bridge group. Bandwidth is provided on a best effort basis in framerelay. Troubleshoot problems with framerelay circuits on your. Configure router to be a frame relay switch duration. By combining multiple physical interfaces into a bundle, you can design a frame relay interface that has. If your verification procedure indicates that your frame relay configuration is not working properly, you need to troubleshoot the configuration. In this first example, the local management interface lmitype defaults to cisco lmi on spicey. The structure of the frame relay frame shown in the figure. Frame relay terms and concepts 379 figure 152 frame relay terminology, part i frame relay components frame relay wan service comprises four primary functional components.
Troubleshoot problems with framerelay circuits on your cisco. Frame relay configuring a frame relay switch in gns3 duration. This command assign ip address in serial 000 of r1. Cisco router frame relay switch configuration point to. A serial connection, such as a t1e1 leased line, connects the router to the frame relay switch of the carrier at the nearest pointofpresence pop for the carrier.
This article will explain frame relay configuration in cisco packet tracer. While the frame relay standard specifies methods for setting up and maintaining both switched. The switching table for the frame relay switch is shown in table. Configure router in gns3 as a frame relay switch duration. 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. So with iou i want a frame relay connecting to four other routers in a hub and spoke topology. You will create permanent virtual circuits pvcs and assign data link connection identifiers dlcis. A fr switch acts as dce and the customer equipment works as dte. Cisco frame relay configurations configuring frame relay. A frame relay fr network is shown in the figure below.
Preliminary configuration stepsthe basics of configuring a cisco device running the ios. Lab setup instructions\cisco basic ccna lab setup instructions. Jul 10, 2008 lets see how you can configure framerelay switch to use your in studies. This can be seen clearly by the encapsulation of type frame relay that is specified in the config. The sub interface id does not need to match the frame relay dlci, however i. As a ccna candidate you are familiar with the concept of framerelay, although you do not need to configure the framerelay switch. Normally you dont really have to think about the framerelay switch since this is something that the service provider will configure. Frame relay switch configuration packet tracer mohamed arafa. The frame provider and customer agree on a committed information rate. Related documents cisco ios widearea networking configuration guide, release 12. The figure5 depicts operation of frame relay switch. Establishes an exclusive connection during the transmission period called virtual connec. Frame relay interface configuration subcommands 68.
The cisco router behaving as a frame relay switch switches frame relay frames received from interface serial43 on dlci 403 to interface serial41 on the outgoing dlci to 304. Frame relay, cisco ios release 15s 19 configuring frame relay. This command will change default encapsulation method to frame relay. Frame relay configuration with examples icnd2 200105. In case of any problem regarding to fram relay configuration on cisco devices, ask your question through. Configuring pointtopoint frame relay links free ccna workbook. On each serial interface, configure the encapsulation to frame relay, define the interface as a frame relay dce, and set the clockrate. A frame relay switch is required for configuring a frame relay network.
Cisco framerelay switch configuration framerelay requires a framerelay switch that switches one dlci to another, creating a virtual circuit. Frame relay switch, frame relay configuration and frad device. Nov 02, 2005 once you have reliable connections to the local frame relay switch at both ends of the permanent virtual circuit pvc, then it is time to start planning the frame relay configuration. When carriers use frame relay to interconnect lans, a router on each lan is the dte. 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. For this configuration, we need to designate one of the routers to be the frame relay switch. How to configure frame relay on cisco router technig. Cisco routers can be configured as dedicated frame relay switches that act as dce devices. These are provided typically by an isp, however if you are studying for your ccna.
On a frame relay switch, frames from a frame relay pvc arriving on an incoming interface are switched to a frame relay pvc on an outgoing interface. Read the wikipedia article to learn more about frame relay. The service provider configures the frame relay switch, which helps keep enduser configuration tasks to a minimum. The frame relay 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. The term virtual here means that the two dtes are not connected directly but through a. Adtran as the frame relay switch, the clock dce is provided for each serial link. An fr network may be considered as a fr cloud that consists of fr switches, and customer nodes.
Recently the frame relay switch of one of your wan links died and you decided to replace it with a cisco router. 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. The switching paths taken by the frames are based on the static frame relay route table. This tutorial explains how to configure frame relay step by step. Local management interface lmi message is used to check the status between frame relay dte and dce. Configuring a pointtomultipoint frame relay wan free.
The values of nt1 and nn1 combine to determine how often full status. You can also try this on live routers and other network simulators, but the frame relay switch configuration varies. To simulate the frame relay wan connections, use a router with three serial ports to act as a frame relay switch. Jul 14, 2010 the configuration for multiple frame relay switches is the same as having one frame relay switch with routers connected to it. The service, once widely available and implemented, is in the process of being discontinued by major internet service. Configure fr switch as a frame relay switch and create a pvc between r1 and r2. In previous lessons i gave an introduction about framerelay and explained how to configure framerelay pointtomultipoint. May 28, 2014 everything you need to know about frame relay for the ccna exam and also for the route exam. Frame relay frame structure essentially mirrors almost exactly that defined for lapd.
Each frame relay protocol data unit pdu consists of the following fields. Pdf frame relay protocol please refer to the above diagram, which shows a configuration based on the frame relay protocol. Lmi provides status updates of virtual circuits between the frame switch and. There is a virtual channel between user a and user b. The basic configuration of frame relay is simple, but the network administrator plans the. Configuring the frame relay encapsulation on a logical interface 9. This guide walks through how to configure frame relay on cisco routers. You are working for a huge international car company as the senior network engineer. May 08, 2016 frame relay switch configuration packet tracer mohamed arafa. Framerelay local management interface lmi lmi is the type of signaling used between your router and your providers framerelay switch. The following examples illustrates the process of configuring a frame relay. Dec 18, 2011 frame relay is a wan technology that uses packet switching methodology for communication.
Frame relay frame relay is a packet switching technology that fragmented into transmission units called frames and sent in highspeed bursts through a digital network. Interconnection between their switches and then a physical connection to user b. Scenario your isp has provisioned frame relay pvcs for the international travel agency wan. So to assist you, below we will discuss one of the more difficult ccna concepts. Setting up a 2620xm as a frame relay switch 25098 the. Frame relay tutorialnetwork,frame,switch,topology,service. Jul 21, 2005 troubleshoot problems with frame relay circuits on your cisco router by david davis ccie in networking on july 21, 2005, 12. Here is the output of show frame relay lmi command executed on r1. It includes a bibliography and a set of www sites with information on frame relay networks. Keywords wide area network, frame relay cloud, router. The service is also offered at t3 rates by some of the frame relay vendors. May 26, 2016 first, to reduce the congestion control, frame relay only uses a single bit in its header.
Routers a, b, and c are frame relay dtes connected to each other via a frame relay network. Frame relay is one of the most popular wan service deployed over the past decade. 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. The configuration for multiple frame relay switches is. Frame relay, cisco ios release 15s 16 configuring frame relay understanding frame relay subinterfaces. As part of the big lab i am doing i want to do some work with frame relay. Comprehensive guide to configuring and troubleshooting frame.
Configuring a pointtomultipoint frame relay wan when it comes to the hub and spoke topology, the hub is most commonly deployed with a pointtomultipoint interface. Scenario as the network engineer for international travel agency, prepare to deploy frame relay as the primary connectivity for the company wan. How to configure frame relay in cisco packet tracer. In this example, the frame relay switch is actually physically a router, a layer three device, but its functionality in this case is a layer two device. Frame relay switch configuration packet tracer youtube. 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. Frame relay switching is supported on the following interface types. How to configure a cisco router as a frame relay switch. The cloud is the frame providers network, and the customer has no control or even. Furthermore, it uses notification system for congestion not exclusively for the per virtual circuit. A virtual circuit is established between the dte and corresponding dce. Nvram copy startup running this command merges configuration from nvram to ram.
How to configure, verify ppp and basic concepts of frame relay. This will show you if the lmi packets are being sent and received properly. This command is executed in serial interface configuration mode to configure the pointtopoint framerelay interface dlci assigned to the interface. The router configured for frame relay switching over isdn cannot initiate the isdn call.
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