How is dlci used

For a list of recommended data segmentation sizes, see the "Usage Guidelines" section. Optional; supported on the Cisco MC only. Specifies the upper limit on the voice bandwidth that may be reserved for this DLCI. For more information, see the "Usage Guidelines" section. Optional Indicates the IP address of the main interface of a new router or access server onto which a router configuration file is to be automatically installed over a Frame Relay network.

The ppp keyword and virtual-template-name argument were introduced. This command is typically used for subinterfaces; however, it can also be used on main interfaces. Using the frame-relay interface-dlci command on main interfaces will enable the use of routing protocols on interfaces that use Inverse ARP. The frame-relay interface-dlci command on a main interface is also valuable for assigning a specific class to a single PVC where special characteristics are desired.

A single physical channel can multiplex several virtual connections. 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. The Frame Relay switch keeps a mapping table of DLCI numbers to outgoing ports; it uses this table to forward frames out ports on the switch. If a DLCI is not defined on the link, the switch will discard the frame. Figure Remember that the valid range of DLCIs is from 16 to Newer Post Older Post Home. The frame relay provides 1. Frame Relay is in fact a level two protocol.

Frame Relay eliminates all layer 3 processing, in practice, this means that there is no layer 3 information or functions required in order for a packet to traverse a frame relay network. There are only a few layer 2 functions used, also known as "core aspects". Data link connection identifier DLCI is a number of a private or switched virtual circuit in a Frame Relay network that tells the Frame Relay how to route the data. The DLCI field identifies which logical circuit the data travels over.

Some important features of frame relay are : Frame relay operates at a high speed 1. Frame relay operates only in the physical and data link layers. It allows the bursty data. It has a large frame size of bytes. Frame relay can only detect errors at the data link layer. It is a switching technique that uses time division multiplexing TDM for data communications. ATM networks are connection oriented networks for cell relay that supports voice, video and data communications.

Session Layer As per Forouzan, the session layer is the network dialog controller, i.