Specifications

ATM Administration
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An ELAN has two primary functions which are directly relevant to this
presentation of ATM Addresses:
❑ It provides a broadcast data path in a connection-based ATM network.
❑ It provides address registration and resolution to the LES and LEC.
It also matches MAC addresses to ATM addresses.
LANE has been subdivided into the four major components shown below
and, as each is discussed in Appendix B, they will not be duplicated here.
1. LAN Emulation Client (LEC)
2. LAN Emulation Services
— Lan Emulation Server (LES)
— Broadcast and Unknown Server (BUS)
— Lan Emulation Configuration Server (LECS)
Briefly. The LECS maintains configuration parameters and a membership
table of LECs for all ELANs in your ATM network. This membership table
contains a list of ELAN members as well as their associated MAC to ATM
addresses. The LECS also provides these addresses to requesting clients
(LECs).
ATI’s ATM software implements ATM Forum’s LEC. LEC implementation,
in turn, conforms to the Lan Emulation Specification 1.0. That is, your switch
implements LEC functionality between a legacy Ethernet device and an
ATM network. This is important since connection to the LAN Emulation
Service (LES) is through LECs.
ATI’s software Release v.2.2 means that the LEC, or port, does NOT
determine ELAN membership — you do — through the LECS.
In short, with v.2.2, all LECs (switches) — as well as all devices
(workstations, PCs, printers, scanners) attached to those LECs — can be
automatically configured from the LECS.