Cabletron Systems MMAC-Plus SFCS-1000, Configuration Manual

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3-2
Configuring an Emulated LAN
3.2 Emulated LAN Components
The components of an emulated LAN include LECs, and LAN Emulation Ser-
vices consisting of: a LECS, a LES, and a BUS. Each of these services may
reside in the same physical system or in separate physical systems. For exam-
ple, the LECS could reside in a switch, while the LES and BUS reside in a
workstation. In the current 4.0 software, the LECS, LES, and BUS are sup-
ported only for switches and for SunOS. The functional interconnections of a
simple ELAN consisting of two LECs, an LECS, a LES, and a BUS are shown
in Figure 3.1.
Figure 3.1 - Basic Emulated LAN Interconnections
Workstation Bridge
LAN Emulation
Client
LAN Emulation
Client
LAN Emulation
Configuration Server
(LECS)
LAN Emulation Server
(LES)
Broadcast and Unknown
Server
(BUS)
Legacy
LAN
LAN Emulation Services
(LEC) (LEC)