ATM Configuration and Troubleshooting Guide

ATM Adapter Overview
Understanding the HP ATM Adapter
Chapter 1 3
The ATM adapter in system A is also a member of two Emulated LANs
(ELANs). So, it also has another two network interfaces, which are
configured as LAN Emulation Clients (LECs). Through one LEC
interface, System A is a member of one ELAN, and through the other
LEC interface it is a member of another ELAN. TCP/IP is used as the
networking protocol on top of these ELANs. So, System A is a member of
three IP subnets—one for Classical IP and one for each ELAN—and so it
needs three unique IP addresses, one for each IP subnet to which it
belongs. Note that each of the ATM adapter’s IP addresses must be
different because the adapter belongs to different IP subnets.
The LEC provides the main LAN Emulation feature that allows access to
legacy LANs. An edge device is used to bridge the ATM part of the ELAN
with the legacy Ethernet or legacy Token Ring LAN part. System A can
have up to 32 ELAN interfaces configured simultaneously as well as the
one Classical IP interface.
Note that System A can be used as a router between IP subnets.