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This soft copy for use by IBM employees only.
Figure 25. Campus LAN Interconnect and ATM Server Access
4.7.3 ATM TR/Ethernet Bridge Module and LAN Emulation
The ATM TR/Ethernet Bridge Module provides connectivity between traditional
LANs (token-ring or Ethernet) and ATM networks by sending LAN frames
transparently over the ATM network using LAN emulation to resolve
MAC-to-ATM addresses.
The IBM LAN emulation service allows the ATM network to emulate the services
of either a token-ring or an Ethernet LAN. The LAN emulation service is
provided jointly by a LAN emulation server (LE server) and the LAN emulation
client (LE client) software running in the device attached to the ATM network.
As an LE client, the ATM TR/Ethernet Bridge Module is able to find the correct
ATM destination, to set up the connection, and to switch LAN traffic to that
destination on behalf of a LAN endstation. It is self-learning, meaning that it is
able to discover its ATM partners and to establish connections on an as-needed
basis.
Chapter 4. IBM 8285 ATM Modules 61