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Glossary
204 Avaya P460 Reference Guide
LECS
LAN Emulation Configuration Server. A LECS is an entity that assigns individual
clients to particular ELANs by directing them to the LES that corresponds to the
ELAN. There is logically one LECS per administrative domain that serves all
ELANs within that domain.
LES
LAN Emulation Server. An entity that implements the control function for a
particular ELAN. There is only one logical LES per ELAN, and it is identified by a
unique ATM address.
Link-State Protocols
A series of routing protocols, such as OSPF, which permit routers to exchange
information about the accessibility of other networks and the cost or metric to reach
the other networks.
Lobe
In a Token Ring network, a lobe is a section of cable that attaches a device to an
access unit.
LSA
Link-State Advertisement. A broadcast packet, used by Link-State Protocols, that
contains information about neighbors and path costs. LSAs are used by receiving
routers to maintain their routing tables.
MAC Address
Media Access Control Address. The MAC Address is a hardware address that
uniquely identifies each node of a network.
MAC Layer
In IEEE 802 networks, the MAC layer is a sublayer of the Data Link Control (DLC)
layer. The MAC layer interfaces directly with the network media. Each different
type of network media therefore requires a different MAC layer.
MAC List
A list of MAC Addresses of devices that are allowed to access the network through
the selected port. Each port can have a MAC List. If the port's security option is
enabled, no device can access the port unless the device's address is on the port's
MAC List.
MAN
Metropolitan Area Network. A data communications network designed for a town
or city. Usually characterized by high-speed connections using fiber optical cable or