Operation Manual

LAN Emulation
108
That is, when a LEC is presented with a frame for transmission whose LAN
destination is unknown to that client, it must issue a LAN emulation address
resolution protocol request frame to the LES over its control point-to-point
VCC. The ATM protocol requires a destination ATM address to set up a
connection across the network. Yet most people will only “know” the MAC
address of the destination.
As shown in the following figure, the ATM approach used within the LAN
Emulation protocol uses a LES which acts as an Address Resolution Server
to help LAN Emulation clients map the MAC address into an ATM address.