ATM Configuration and Troubleshooting Guide

Glossary
LLC multiplexing
Glossary 333
maximum packet sizevaries fromnetwork to
network, but is usually a few thousand
octets. A typical size is 1536 octets.
IP address Internet Protocol address. An
identifier for a network node expressed as
four fields separated by decimal points (for
example, 136.19.0.5.). An IP address is
site-dependent and assigned by a network
administrator.
L
LAN Emulation A protocol to make an
ATM network look and behave like an
Ethernet or Token Ring LAN. The LANE
protocol defines a service interface for higher
layer (the network layer) protocols that is
identical to that of existing LANs; and
encapsulates data sent across the ATM
network in the appropriate LAN MAC
packet format. LAN Emulation allows
interoperability between ATM and existing
LAN technology.
LEC LAN Emulation Client. A LEC is the
entity in an end system that performs data
forwarding, address resolution, and other
control functions for a single end system
within a single ELAN.
LECS LAN Emulation Configuration
Server. The LECS is an entity that assigns
individual LANE clients to particular
ELANs by directing them to the LES that
corresponds to the ELAN. There is logically
one LECS per administrative domain, and it
serves all ELANs within that domain.
LES LAN Emulation Server. The LES
implements the control function for a
particular ELAN. There is only one LES per
ELAN, and to belong to a particlur ELAN
means to have a control relationship with
that ELAN’s LES. Each LES is identified by
a unique ATM address.
LIS Logical IP Subnet. In each LIS there is
one ATM ARP server and one or several
ATM ARP clients. Communication between
two LISes requires a router.
LLC Logical Link Control.
LLC multiplexing A LAN Emulation
Version 2 feature that allows multiple LECs
and other protocols to share the same VCs.