What is DLCI in Frame Relay?
(Data Link Connection Identifier) The number of a private or switched virtual circuit in a frame relay network. Located in the frame header, the DLCI field identifies which logical circuit the data travels over, and each DLCI has a committed information rate (CIR) associated with it.
What is Multi Link Frame Relay?
Multilink frame relay was developed to address the need for more access bandwidth to support the ever-increasing number of broadband applications. MFR allows frame relay customers to realize cost- effective gains in bandwidth using inexpensive T1/E1 circuits without significant change to their network infrastructure.
Is Frame Relay point to multipoint?
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.
What is the length of DLCI field of frame relay switch frame?
The address field DLCI has a variable length (6- or 10-bit length).
What is LMI in frame relay?
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.
How does a frame relay work?
How Does Frame Relay Work? Frame relay uses packet switching technology. This means that it breaks data, such as call data, into smaller packets, also known as frames, to transmit it through a shared frame relay network. These data packets are then reassembled at the data’s destination.
What is frame relay protocol?
Frame relay is a protocol that defines how frames are routed through a fast-packet network based on the address field in the frame. Frame relay takes advantage of the reliability of data communications networks to minimize the error checking done by the network nodes.
What is Relay configuration?
relay configuration: An operating configuration in which a circuit is established between two stations via an intermediate relay station. Two links are used simultaneously and the channel connections at the relay station are accomplished completely within the station. (
What is Becn and Fecn in frame relay?
BECN and FECN Acronym for Backward Explicit Congestion Notification and Forward Explicit Congestion Notification. Both are congestion avoidance techniques. BECN is used to notify the sender that congestion has occurred. FECN is used to inform the receiver of the traffic that congestion.
What is the difference between frame relay and MPLS?
MPLS is a private networking technology similar to the concept of Frame Relay in that it is delivered in the “cloud”. The primary difference with MPLS is that you can purchase quality of service for applications across your WAN.
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.
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. Because the default LMI setting is supported by Cisco IOS Software Release 11.2 and later, you do not need to code the LMI type.