
114056 Rev. A 4-1
Chapter 4
Understanding ATM LAN Emulation Concepts
This chapter provides general information about LAN emulation as described by
the ATM Forum. For more information about LAN emulation, refer to the ATM
Forum document LAN Emulation Over ATM (Version 1.0).
Refer to Chapter 8 for instructions on how to customize LAN emulation on your
ATM router.
LAN Emulation Basics
LAN emulation allows virtual communication of traditional LAN devices and
applications over an ATM network. An ATM network can run one or more
emulated LANs. However, each emulated LAN is independent of the others and
devices cannot communicate directly across emulated LAN boundaries.
LAN Emulation Connectivity
An emulated LAN can provide Ethernet (IEEE 802.3) or Token Ring
(IEEE 802.5) connectivity. With an emulated Ethernet or Token Ring network
over ATM, software applications can interact as if they were connected to a
traditional LAN.
Note: Communication between emulated LANs is possible through routers
and bridges only (possibly implemented on the same endstation).
Note: Bay Networks currently supports only Ethernet (IEEE 802.3) emulated
LAN connectivity.
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