![]() ![]() ![]() Data-link connections (DLCs) are PVCs preconfigured by both sides of the connection. The control procedures function in three ways: link integrity verification initiated by the user device, network status report giving details of all PVCs, and network notification of whether a PVC's statusĬhanges from active to inactive or vice versa. PVCs function via a Local Management Interface (LMI), which provides control procedures. So any single site can commun-icate with any other single site without the need for multiple dedicated lines. But in a Frame- Relay network, the bandwidth is sharedĪmong multiple users. A PVC is needed for each site in the network, just as a private line is. Single, dedicated lines are not needed to make each WAN-to-WAN connection with Frame Relay, thus reducing costs.Įssentially, a permanent virtual circuit (PVC) is your dedicated connection through the shared Frame-Relay network replacing a dedicated end-to-end line. In the past, setting up WANs required the use of private lines or circuit switching over a leased line. Frame Relay also offers advantages for interconnecting WANs. Typically, these applications include data transfer, CAD/CAM, and client-server applications. Frame Relay is an ideal choice for connecting WANs that have unpredictable, high-volume, and bursty traffic. Since it's protocol independent, it can process traffic from different networking protocols, like IP, IPX¿, and SNA. Relay uses a simple link layer protocol, your equipment usually requires only software changes or simple hardware modifications, so you don't have to invest a lot to upgrade your system. By reducing the amount of processing required, you get improved performance and response time. Multiple logical connections can be sent over a single physical connection, reducing your internetworking costs. With its low overhead, it's perfect for today's complex networks. But if traffic and your service agreement allow, data can burst above your committed rate. And instead of being allocated a fixed amount of bandwidth, Frame-Relay services offer a Committed Information Rate (CIR) at which data is transmitted. So, in effect, each endpoint can communicate with many destinations over one access link Each frame contains all the information necessary to route it to the correct destination. Frame Relay typically operates at 56 or 64 kbps to 1.544 or 2.048 Mbps.įrame Relay sends information in packets called frames through a shared Frame-Relay network. In addition, Frame Relay is entirely digital, which reduces the chance of error and offers excellent transmission rates. Processing time is minimised, so the transmission of data is much faster and more efficient. The intelligent network devices connected to a Frame-Relay network are responsible for the error correction and frame formatting. This data is encapsulated by theįrame-Relay equipment, not the network. Frame Relay is also protocol independent-it accepts data from many different protocols. A Frame-Relay network doesn't perform error detection, which results in a considerably smaller amount of overhead and faster processing than X.25. But the Frame-Relay process is streamlined-a faster, more efficient form of networking. Like X.25, Frame Relay is a packet-switched protocol. It uses a packet-switching technology, similar to X.25, but is more efficient and can make your networking quicker, simpler, and less costly.įrame Relay was developed to solve communication problems that other protocols could not: the increased need for higher speeds, an increased need for large bandwidth efficiency, particularly for clumping ("bursty" traffic), an increase in intelligent network devices that lower protocol processing, and the need to connect LANsĪnd WANs. Frame Relay, which is a relatively new wide-area networking method, is gaining in popularity. Each environment is a unique combination of equipment from different vendors. ![]() With the complexity of today's networks, management can be difficult if you don't have Today's LANs and computing equipment have the potential to run at much higher speeds and transfer very large quantities of data. ![]()
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