From Wikipedia, the free encyclopedia A Data Link Connection Identifier (DLCI) is a bit-level Frame Relay 10-Link-Link-Local-Virtual-Circuit-Identifier used to assign frames to a specific PVC or SVC. Frame relay networks use DLCI to statistically multiplex frames.
Connection identification bit of the DLCIData link. The DLCI is used to identify the virtual link so that the receiving end knows which information link a frame belongs to. Please note that this DLCI is of local importance only. A single physical channel can multiplex several virtual connections.
Frame Relay is a high-performance WAN protocol that works on physical and security layers in the OSI reference model. Frame Relay was originally developed for use through the Integrated Services Digital Network (ISDN) interface. Today it is also used in a number of other network interfaces.
Frame Relay sends information in packets called frames over a shared FrameRelay network. Each frame contains all the information necessary to lead it to the right destination. Therefore, each endpoint can effectively communicate with many targets on a network logon connection.
Local Management Interface (LMI), a technology developed by Cisco, is a signaling standard used between routers and frame relay switches for various purposes, such as exchanging storage time information, global addressing, multicast, and current status virtual connections. .
Advantages of Frame Relays. Frame Relay saves on customer equipment (CPE), local access and switching networks. It also reduces administration and operating costs. A more direct connection between locations can be achieved with minimal additional costs.
Frame Relay is a packet-switched telecommunications service designed to provide low-cost data transmission for intermittent traffic between local area networks (LANs) and between endpoints across wide area networks (WANs).
MPLS is a proprietary networking technology similar to the Frame Relay concept in that it is deployed in the cloud. The main difference with MPLS is that you can purchase QoS for applications over the WAN. If a program works well with Frame Relay, it works best with MPLS.
The difference between Frame Relay and ATM is the transfer speed, efficiency, precise packet delivery, etc. Frame Relay provides 1544 Mbit / s or 44 736 Mbit / s. ATM instead offers 51 Mbit / s or 155 Mbit / s.
In this case, Frame Relay is frame-based virtual connections, PPP is connection approval / negotiation, and PPPoE Circuit is packet learning. These technologies are not widely used these days (although Cisco sells a number of them to people using outdated but useful / valuable networks).
The Data Link Connection Identifier (DLCI) is a number for a virtual private or switched connection in a Frame Relay network that tells Frame Relay how data should be forwarded. The DLCI field identifies which logic circuit the data is moved to.
Some of the main features of Frame Relay are:
ATM and ATM network. ATM stands for asynchronous transfer mode. It is a switching technology that uses time division multiplexing (TDM) for data communication. ATM networks are connection-oriented cellular relay networks that support voice, video, and data communications.
A permanent virtual connection (PVC) is a permanently established connection between two or more nodes in Frame Relay and Asynchronous Transmission Mode (ATM) networks. It allows you to establish a logical connection as well as a physical connection between nodes that communicate frequently or continuously.
TABLE 6.5 WAN Technology Comparison
Congestion Control: Frame Relay uses congestion avoidance by using two bit fields in the Frame Relay frame to explicitly notify the source and destination of the congestion: BECN: Explicit backward congestion notification (BECN) warns the sender of the congestion network congestion.