O'Reilly logo

CCIE Routing and Switching Exam Quick Reference Sheets by Anthony Sequeira

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 6. WAN

Frame Relay

Local Management Interface (LMI)

Connection between customer (data terminal equipment, DTE) and service provider (data communications equipment, DCE) is known as User-Network Interface (UNI). It is in this area where Frame Relay operates. The Network-to-Network Interface (NNI) is used to describe how different Frame Relay provider networks interconnect. Providers often use ATM in the cloud to carry the Frame Relay data.

Frame Relay multiplexes many virtual circuits (VC) over a single physical transmission link. It uses data-link connection identifiers (DLCI) on each DTE to identify the different virtual circuits. The DLCI is typically only locally significant between the DTE and the frame switch. Some providers allow ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required