Frame Relay Part -2 (Features)...

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  1. Frame Relay’s operate at high speed of 1.544 Mbps to 44.376 Mbps.
  2. Frame Relay’s operates only in the physical and data link layers. So, it can be easily used in internet.
  3. It allows busty data.
  4. It has a large frame size of 9000 bytes. So, it can accommodate all local area network frame sizes.
  5. Frame Relay is being used for a number of reasons, some of the important reasons are like high data rate, allows busty data, and has lower overheads.
  6. One of the nice features of Frame Relay is that in all of these situations, you need only one serial interface to handle the VC connections. You could even use a smaller router to handle a lot of VC connections.
  7. Frame Relay can detect error’s (at data link layer) but there is no flow control or error control.
  8. The damaged frame is simply dropped. There is no retransmission this is to increase the speed. So, frame relay need’s a reliable medium and protocols having flow control and error control.
  9. Frame Relay with VC is a good solution if your router has a single serial interface, but needs to connect to multiple WAN destinations.
  10. Instead of using manual resolution for your PVCs, you can use dynamic resolution. Dynamic resolution uses a feature called inverse ARP. This is something like a reverse ARP in TCP/IP. Inverse ARP allows devices to automatically discover the layer-3 protocol and address that are used on each VC.
  11. Frame Relay is a data link layer packet-switching protocol that uses digital circuits and thus is virtually error-free.
  12. The connection across the carrier’s network is not defined by the Frame Relay standards. Most carriers, however, use ATM as a transport to move Frame Relay frames between different sites.
  13. Frame Relay is connection-oriented: a connection must be established before information can be sent to a remote device. The connections used by Frame Relay are provided by virtual circuits (VCs).
  14. VCs are also full-duplex: you can simultaneously send and receive on the same VC. Other packet- and cell-switching technologies, such as ATM, SMDS, and X.25, also use VCs.
  15. VCs are more cost-effective than leased lines because they reduce the number of physical connections required to fully mesh your network, but still allowing a fully-meshed topology.
  16. When you use VCs, your router needs only a single serial interface connecting to the carrier. Across this physical connection, you’ll use VCs to connect to your remote sites.
  17. Frame Relay with VCs is a good solution if your router has a single serial interface, but needs to connect to multiple WAN destinations.

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