Frame relay is one of the wan protocols you need to understand if you plan to become ccna certified. There are two kinds of congestion notification systems that. How to configure frame relay on cisco router technig. Figure 111 outlines the basic physical topology and related terminology in a frame relay network. The frame relay protocol allows network designers to reduce costs by using shared facilities that are managed by a frame relay service provider. Jul, 2016 in order for a frame relay wan to transmit data, data terminal equipment dte and data circuitterminating equipment dce are required.
Information model objects imos this section describes the following imos. The frame relay is the packet switched network as well as it may compare with the x. It includes a bibliography and a set of www sites with information on frame relay networks. Asynchronous transfer mode atm is a cell relay protocol that, in combination with sonet, allows highspeed connections. Dtes are typically located on the customers premises and can encompass terminals, routers, bridges and personal computers. Frame relay is a protocol used for connecting devices on a wide area network. In this section of data communication and networking virtualcircuit networks. Aug 12, 2019 r1 and r2 routers are frame relay spokes. Traditionally, this was done using private lines, or circuit. Frame relay employs a simple form of packet switching. Frame relay works at the datalink layer of the osi model and provides data transfer rates from 56 kbps to 1. The framerelay interfacedlci command is meant for pointtopoint framerelay connections and basically it means this dlci belongs to this interface. Frame relay frame relay is a highperformance wan protocol that operates at the physical and data link layers of the osi reference model. Frame relay is a layer two technology and as a result, dlcis do not traverse a router.
Although frame relay is popular due to its relatively inexpensive nature, it is being replaced in many areas by. Mar 25, 2015 frame relay is often used to connect lans with major backbones as well as on public wide area networks and also in private network environments with leased t1 lines. This chapter focuses on frame relay s specifications and applications in the context of wan services. Establishes an exclusive connection during the transmission period called virtual connec. Dces are managed by the carriers and provide switching and associated services. Explain how congestion control is performed in frame relay network. Its also one of the most difficult protocols to understand for most ccna students. Verify the framerelay map statements using the show framerelay map command. The extreme simplicity of configuring user equipment in a frame relay network offers another reason for frame relays popularity. Jan 19, 2012 frame relay to provide a telecommunication service for costefficient data transmission for intermittent traffic between local area networks lans and betwe. Frame relay is a highperformance wan protocol that operates at the. Configuring frame relay feature history release modification forinformationaboutfeaturesupportinciscoios software,useciscofeaturenavigator. Frame relay is a scalable wide area network solution which makes use of packetmode transmission. The cloud is the frame providers network, and the customer has no control or even.
If the frame relay network is congested, demarked frames can be. Users pay fixed charges for the local connections from each site in the frame relay network to the first point of presence pop in which the provider maintains a frame relay switch. Frame relay networks consist of frame relay switches interconnected by pointtopoint frame relay links or interfaces. Multicasting with frame relay customer network management 2. Basic concepts of frame relay explained in easy language. Configure the lmi type and dlci of virtual circuits on each serial interface of the cloud used for frame relay operation. If you are studying framerelay for cisco exams then you only need to understand how to configure it from. All frame relay routers are interconnected through a cisco packet tracer cloud device which emulates frame relay circuits. A frame relay network will often be depicted as a network cloud, because the frame relay network. Normally you dont really have to think about the framerelay switch since this is something that the service provider will configure.
Pdf establishing frame relay connections using packet tracer. Frame relay operates in just the physical and data link layers. Scribd is the worlds largest social reading and publishing site. 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. It is used often on subinterfaces because the router doesnt know which dlci belongs to which subinterface. Examples of wan technologies and protocols include frame relay, atm. The job of the network device is to switch or route the frame through the network to the proper destination user device. The future bibliography books articles ansi and itut standards internet rfcs and drafts related to frame. Dec 03, 2019 frame relay is a virtualcircuit widearea network that was designed in response to demands for a new type of wan in the late 1980s and early 1990s. Framerelay requires a framerelay switch that switches one dlci to another, creating a virtual circuit. Frame relay is fundamentally connection oriented, which means that a vc must be set up across the frame relay network prior to any data transfer. May 26, 2016 frame relay itself is implemented over a reliable network and, flow control can be addressed by the higher layers in the osi model.
Frame relay is an example of a packetswitched technology. It requires a dedicated connection during the transmission period and is not ideal for voice or video, which require a steady flow of transmissions. The basic frame protocol, which is used in the frame relay is hdlc and the typical speed is higher than the x. Frame relay protocols and configuration searchnetworking. 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. Frame relay user guide for routing devices techlibrary. Thus, in general, framerelay is less expensive than dedicated wan lines, but customers are not guaranteed bandwidth.
Frame relay and atm mcq multiple choice based short questions and answers,it cover the below lists of topic, all the multiple choice question and answer mcqs have been compiled from the books of data communication and networking by the well known author behrouz forouzan. This tutorial explains how to configure frame relay step by step. Frame relay networks an overview sciencedirect topics. Frame relay is one of the most popular wan service deployed over the past decade. 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. Frame relay allows for a single serial interface on the router to connect multiple remote sites with the help of virtual circuits. Apr 28, 2016 frame relay, is an endtoend wan technology, also considered as secondgeneration x. In this tutorial ill explain to you why we use d frame relay and how it works. Dec 04, 2011 this article will explain frame relay configuration in cisco packet tracer. The frames travel through a series of switches within the frame relay network and arrive at their destination. Congestion control in frame relay basic working mechanisms. Today, it is used over a variety of other network interfaces as well. This means it can easily be used as a backbone network to provide services to protocols that. 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.
An atm backbone is shown, because it is a common method of interconnecting fr. Frame relay offers features that make it ideal to interconnect lans using a wide area network wan. Frame relay network topology computer network free 30. Pdf security protocol for frame relay researchgate.
After configuring frame relay pvc and you are troubleshooting network issue, verify that frame relay is operating correctly on that interface using the show interfaces interface number command. A leased line is installed between the router and a nearby frame relay switch. Remove the previous configuration from r1s serial00 interface and create a pointtomultipoint subinterface and configure it with the correct framerelay maps. Ce protocole est utilise par les fournisseurs dacces pour transmettre des signauxvocaux et numeriques entre reseaux locaux par lintermediaire dun reseau etendu. Pdf on oct 8, 2017, ibrahim ali ibrahim diyeb and others published frame. Pdf this paper considers the protection of traffic using the frame relay service. Configuring pointtopoint frame relay links free ccna workbook. Lan interconnection with frame relay introduction to lan interconnection benefits of frame relay setting up frame relay 3. 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. 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. Frame relay and atm overview of frame relay and atm network internetworking service internetworking 4. With the advent of ethernet over fiber optics, mpls, vpn and dedicated broadband services such as cable modem and dsl, the end may loom for the frame relay protocol and encapsulation. How to configure frame relay in cisco packet tracer jesins.
Read the wikipedia article to learn more about frame relay. Jun 07, 2019 the configuration is completed successfully. Frame relay protocol headers and trailers are simply used to let a packet traverse the frame relay network, just like ethernet headers and trailers are used to help a packet traverse an ethernet segment. By default all dlci numbers are assigned to the physical interface. You can also try this on live routers and other network simulators, but the frame relay switch configuration varies. To install software on a new router or access server by downloading software from a. This chapter describes the frame relay protocol details, along with the associated configuration. The show interfaces command displays how the encapsulation is set up, along with useful layer 1 and layer 2 status information, including. To install software on a new router or access server by downloading software from a central server over an interface that supports frame relay, see the module.
Frame relay is a widearea network with the following features. This chapter focuses on frame relays specifications and applications in the context of wan services. Frame relay free download as powerpoint presentation. Frame relay originally was designed for use across integrated services digital network isdn interfaces. Configuring a pointtomultipoint frame relay wan free ccna. Figure 111 frame relay components figure 111 shows the most basic components of a frame relay network. Frame relay to provide a telecommunication service for costefficient data transmission for intermittent traffic between local area networks lans and betwe. Frame relay is a layer 2 data link widearea networking wan protocol that. Dsl have higher download speeds, but satellite systems are about ten times faster than. Data link connection identifiers dlcis are numbers that refer to paths through the frame relay network. Unfortunately there are several such network designs, including the public telephone network ptn, the internet, catv distribution systems which are evolving into networks, local area networks, atm and frame relay networks, and a proliferation of wireless networks dect, gsm, is54 and is95, jdc, etc.