As an interface to a network, frame relay is the same type of protocol as x. Ppt frame relay powerpoint presentation free to download. We use your linkedin profile and activity data to personalize ads and to show you more relevant ads. Configure frame relay for the cisco ccna part 1 duration. Large enterprises, governments, isps, and small businesses use frame relay, primarily because of its price and flexibility.
Since you are working your way to becoming the ultimate networking guru, you are prepared to do a full frame. A dlci is used to identify this dedicated communication path between two end nodes. There is no conceptual limit to the number of oneway multicast. Thus, in general, framerelay is less expensive than dedicated wan lines, but customers are not guaranteed bandwidth. 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. Start studying ccna 200120 chapter understanding frame relay concepts foundation. The current bbf was formed in 2009 from the merger of the dsl forum and the ipmpls forum. Jan 19, 2012 frame relay to provide a telecommunication service for costefficient data transmission for intermittent traffic between local area networks lans and betwe. It is a nonbroadcast multiaccess nbma network which has its roots from x. Data is sent in hdlc packets, referred to as frames. In a sitetosite vpn, devices in the service provider network also fall into one of two categories. Once one becomes a master of frame relay design and configuration, it. Each customer gets a private line or leased line to a frame relay node called a virtual circuit vc through the frame relay cloud. This tutorial explains basic concepts of frame relay step by step in detail with examples including frame relay fundamental, frame relay.
Basic concepts of frame relay explained in easy language. How to configure, verify ppp and basic concepts of frame relay. Configure a basic frame relay permanent virtual circuit pvc, including configuring and troubleshooting frame relay on a router serial interface and configuring a static frame relay map. Pdf now a days the networking area is getting more and more advanced as it. As a ccna candidate you are familiar with the concept of framerelay, although you do not need to configure the framerelay switch. It operates at the data link layer providing a connectionoriented network. Traffic analysis can distinguish frame relay format from lapd by its lack of a control field. Service provider p devicesp devices are devices such as routers and switches within the provider network that do not directly connect to customer networks. Frame relay allows for a single serial interface on the router to connect multiple remote sites with the help of virtual circuits. Scribd is the worlds largest social reading and publishing site.
Frame relay is a synchronous hdlc protocol based network. In fact, you can think of frame relay as a way of utilizing existing t1 and t3 lines owned by a service provider. Frame relay pointtopointsub interface router sub interface 1 sub interface 1 site lab 1. Jul 28, 2010 frame relay introduction and concepts part 2 of 4 frame relay is a highperformance packetswitched wan protocol which uses statistical multiplexing and variable length packets. The template sidebar with collapsible lists is being considered for merging. 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. As mentioned previously framerelay is nonbroadcast multiaccess media, which means that there must be a mechanism for layer 3 to layer 2 resolution. Frame relay terms and concepts 381 frame relay virtual circuits frame relay is a connectionoriented service, operating at the data link layer layer 2 of the osi model. Pdf establishing frame relay connections using packet tracer. Instead frame relay ietf or frame relay cisco 2 ways to configure ietf encapsulation. Frame relay to provide a telecommunication service for costefficient data transmission for intermittent traffic between local area networks lans and betwe. Most telephone companies now provide frame relay service for customers who want connections at 56 kbps to t1 speeds. Learn vocabulary, terms, and more with flashcards, games, and other study tools. How to configure a cisco router as a frame relay switch.
Frame relay is a wan technology that uses packet switching methodology for communication. All locations plug into the frame relay cloud, which is a conglomeration of dozens or hundreds of framerelay switches and routers. In the same way, it helps to learn how to configure and verify a ppp along with the pap and chap authentication, and ppoe. The frames contain header information which tells the intervening network.
Unlike leased lines, frame relay requires only a single access circuit to the frame relay. The cloud is the frame providers network, and the customer has no control or even. Scenario your isp has provisioned frame relay pvcs for the international travel agency wan. Aug 29, 2003 mapping via inverse arp or static frame relay map statements is needed only when more than two vcs terminate on the interface or subinterface, because those are the only instances in which confusion about which dlci to use might occur. Frame relay is a scalable wide area network solution which makes use of packetmode transmission.
Framerelay frame structure essentially mirrors almost exactly that defined for lapd. Backtoback frame relay hybrid switching 17nov2007 comprehensive guide to configuring and troubleshooting frame relay 02nov2005 configuration notes for the implementation of eigrp over frame relay and low speed links 10aug2005. 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. Basic frame relay concepts frame relay has become the most widely used wan technology in the world. Frame relay configuration examples and technotes cisco. Figure 15 27 illustrates how voice and data can be merged to more effectively utilize wan. Ccna 200120 chapter understanding frame relay concepts. First, to reduce the congestion control, frame relay only uses a single bit in its header.
Consider figure 2, a company lets say abc has purchased framerelay wan. A frame relay switch is required for configuring a frame relay network. Describe advanced concepts of frame relay technology, including subinterfaces, bandwidth, and flow control. May 26, 2016 first, to reduce the congestion control, frame relay only uses a single bit in its header. Frame relay is an international data link protocol that defines the capabilities to create a frameswitched packetswitched service, allowing dte devices typically routers to send data to many other devices using a single. 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 popular high performance wan protocol that operates at the physical and data link layers of the osi reference model. Each customer gets a private line or leased line to a framerelay node called a virtual circuit vc through the frame relay cloud. Establishes an exclusive connection during the transmission period called virtual connec. It is a broad survey of frame relay networks both from a designers and users perspective. Config wan frame relay pointtopoint sub interface encapsulation. Furthermore, it uses notification system for congestion not exclusively for the per virtual circuit.
Frame relay was originally conceived as a protocol for use over isdn interfaces. This can be accomplished by using the ping and other troubleshooting methods. Frame relay is essentially a packet switched network, and can be compared with an x. After configuring your network, its considered a good idea to verify that your configuration is working. Dlci values typically are assigned by the frame relay service provider for example, the telephone company.
Frame relay frame structure essentially mirrors almost exactly that defined for lapd. Frame relay is one of the most popular wan services deployed over the past decade because of its cost and versatility. Keywords wide area network, frame relay cloud, router. Frame relay from cisco internet protocols computer networking. This tutorial explains how to configure frame relay step by step. Although frame relay is popular due to its relatively inexpensive nature, it is being replaced in many areas by.
If you dont know the answer to a question or youre only partially sure of the answer, you should mark this question as wrong for purposes of the selfassessment. Ce protocole est utilise par les fournisseurs dacces pour transmettre des signauxvocaux et numeriques entre reseaux locaux par lintermediaire dun reseau etendu. Frame relay is a highperformance packetswitched wan protocol which uses statistical multiplexing and variable length packets. Good overview of the concepts behind fast packet switching and frame relay. Frame relay chapter 3 frame relay advanced frame relay concepts frame relay flow control. Frame relay is a type of wan connection use to connect one site to many remote sites through a single physical circuit, this operation makes it easy to construct reliable read more. It was designed to use across isdn interfaces but it is now used over an assortment of other network interfaces. Mapping via inverse arp or static framerelay map statements is needed only when more than two vcs terminate on the interface or subinterface, because those are the only instances in which confusion about which dlci to use might occur. Frame relay is a wide area fast packet switching technology that offers an intelligent alternative to private. Figure 1527 illustrates how voice and data can be merged to more effectively utilize wan. Since you are working your way to becoming the ultimate networking guru, you are prepared to do a full framerelay config.
As mentioned previously frame relay is nonbroadcast multiaccess media, which means that there must be a mechanism for layer 3 to layer 2 resolution. Frame relay is a layer 2 data link widearea networking wan protocol. The concept behind global dlci addressing is to simplify frame relay. The debug frame relay lmi output lists information for the sending and receiving lmi inquiries.
Frame relay configuration frame relay for icnd exam. Frame relay is a protocol used for connecting devices on a wide area network. Frame relay configuration 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. When a data stream enters a frame relay network it is broken into frames and each frame is sent across the network to the destination point. Instead framerelay ietf or framerelay cisco 2 ways to configure ietf encapsulation. Im not involved in sales at all so im not sure what kind of deals they are cutting for it. Frame relay introduction and concepts part 2 of 4 frame relay is a highperformance packetswitched wan protocol which uses statistical multiplexing and variable length packets. The straightforward approach by todd lammle in networking on november 15, 2001, 12. Congestion control in frame relay basic working mechanisms. When the queue is sent, down stream devices are warned of the queue by setting the fecn.
For more information about defaults and usage guidelines, see the corresponding chapter of the router products command reference publication. Frame relay uses the concept of shared access and relies on a technique referred to as. Fifo embodies no concept of priority or classes of traffic. By combining multiple physical interfaces into a bundle, you can design a frame. Our network in this example is configured as illustrated in the figure below.
A frame, in the context of frame relay, is a packet of data. The diagram below of an hdlc frame may be familiar, since without adding specific definitions of how the address, control and crc is used, the diagram is applicable to ibms sdlc, to x. Understanding frame relay frame relay is a protocol for transmitting data over a wide area network wan. The debug framerelay lmi output lists information for the sending and receiving lmi inquiries. This chapter describes frame relay and explains how to configure frame relay on a cisco router. Frame relay operates at layer 2 data link of the osi model. Frame relay can easily be configured to combine traffic from different. In previous lessons i gave an introduction about framerelay and explained how to configure framerelay pointtomultipoint. Frame relay is a packetmode transmission service that exploits. Consider figure 2, a company lets say abc has purchased frame relay wan service from a provider to connect three of its offices. A virtual circuit in frame relay is identified by a number called a data link connection identifier dlci. Each frame relay protocol data unit pdu consists of the following fields.
As the administrator, you are responsible for configuring frame relay among regional offices. With the advent of bisdn, the original concept of isdn is referred to as narrowband isdn. Frame relay from cisco free download as powerpoint presentation. Frame relay introduction and concepts part 2 youtube. In this lesson well take a look at framerelay pointtopoint which is. I work for one of the major isps and we are still deploying frame relay for our business clients. Usually, dlcis 0 to 15 and 1008 to 1023 are reserved for special purposes. They have the option of metro e but more often they choose the frame relay option for some reason. You can go through the basic configuration and verification of the point to point protocol ppp. Some of the important differences between a frame relay network and and x. This section describes the function and displays the syntax of each frame relay command. Frame relay is a standardized wide area network technology that specifies the physical and. Frame relay is a wan protocol for lan internetworking which operates at the physical and data link layer to provide fast and efficient method of transmitting information from a user device to another across multiple switches and routers.
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