Avaya Configuring ATM Half-Bridge Services Manual de usuario descargar pdf (Pagina 19)

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Chapter 1

ATM Half-Bridge Overview

This chapter provides an overview of basic ATM Half-Bridge concepts and the

specific ways Nortel Networks implements these concepts on BLN

and BCN

routers.

This chapter assumes that you understand ATM concepts and terminology. For a

brief overview of ATM, see Appendix B. For detailed information about ATM,

refer to Configuring ATM Services.

This chapter contains information about the following topics:

What Is ATM Half Bridge?

ATM Half Bridge (AHB) is a protocol operating on BLN and BCN routers that

connect remote hosts (PCs and workstations) attached to an IP routed network via

digital subscriber line (DSL) devices (modems). The modems send and receive IP

packets over ATM PVCs using RFC 1483 SNAP/LLC encapsulation. AHB

converts RFC 1483 bridge frames containing IP packets to unencapsulated routed

frames and performs the reverse function for packets returning from the opposite

direction.

Topic Page

What Is ATM Half Bridge? 1-1

How the AHB Router Works 1-4

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Avaya Configuring ATM Half-Bridge Services Manual de usuario Pagina 19