What is Frame Relay LMI?
LMI is a set of signalling standards between routers and frame relay switches. Communication takes place between a router and the first frame relay switch to which it is connected. Information about keepalives, global addressing, IP Multicast and the status of virtual circuits is commonly exchanged using LMI.
What is DTE and DCE in Frame Relay?
A Frame Relay network provides data communications between user devices such as routers and hosts. The user devices are also called data terminal equipment (DTE). The devices that provide access to the Frame Relay network for DTEs are called data circuit-terminating equipment (DCE).
What is Frame Relay configuration?
Frame Relay is a Layer 2 WAN protocol that cand be configured on physical serial links. In addition to physical interfaces, you can also configure two types of logical interfaces for Frame Relay – point-to-point and multipoint.
Is Frame Relay LAN or WAN?
Frame Relay is a standardized wide area network (WAN) technology that specifies the physical and data link layers of digital telecommunications channels using a packet switching methodology.
What are the three different types of LMI?
Three LMI options are available: ansi, Cisco, and q933a. They represent the ANSI Annex D, Cisco, and ITU Q933-A (Annex A) LMI types, respectively. The no form of the frame-relay lmi-type command removes the explicit LMI type configured on the interface.
Whats is LMI?
What is LMI? Local Management Interface (LMI), a technology developed by Cisco, is a signaling standard that is used between the routers and frame relay switches for various purposes such as exchanging information keepalives timers, global addressing, multicasting and the current status of virtual circuits.
What is Becn and Fecn in Frame Relay?
A FECN tells the receiving device that the path is congested so that the upper layer protocols should expect some delay. The BECN tells the transmitting device that the Frame Relay network is congested and that it should “back off” to allow better throughput.
What is Frame Relay and ATM?
The difference between frame relay and ATM lies in the speed of transmission, efficiency, accurate delivery of the packets, etcetera. The frame relay provides 1.544 Mbps or 44.736 Mbps. On the other hand, ATM provides 51 Mbps or 155 Mbps.
What is the default LMI type?
Configuring the LMI type is easy. Today’s most popular option is to use the default LMI setting, which uses the LMI autosense feature….LMI and Encapsulation Types.
| Name | Document | IOS LMI-Type Parameter |
|---|---|---|
| ITU | Q.933 Annex A | q933a |
What is DLCI in Frame Relay?
A data link connection identifier (DLCI) is a Frame Relay 10-bit-wide link-local virtual circuit identifier used to assign frames to a specific PVC or SVC. Frame Relay networks use DLCIs to statistically multiplex frames. DLCIs are preloaded into each switch and act as road signs to the traveling frames.
Does Frame Relay use IP?
Frame relay direct network: Allows data that uses SNA or TCP/IP communications over a frame-relay network to move at speeds of up to 2.048 Mbps.
When would you use a frame relay?
Frame relay is often used to connect LANs with major backbones. It is also used on public WANs and in private network environments with leased T-1 lines. It needs a dedicated connection during transmission and is not ideal for voice or video, which need a steady flow of transmissions.