3Com 7600 manual LAN Emulation

LAN Emulation Overview 12-5

QPhysical Layer

QATM Layer

QATM Layer Statistics

QVirtual Path Connections (VPC)

QVirtual Channel Connections (VCC)

QAddress Registration Information

QService Registry Table

ATM Address In order to establish an ATM connection at the UNI, both the user and the Registration network must know the ATM addresses which are in effect at that UNI.

These ATM addresses can then be used in signaling messages for establishing connections with a specific ATM end system. The address registration procedure provides the means for the dynamic exchange of addressing information between the user and the network at the UNI, at initialization and at other times as required.

LAN Emulation	LAN Emulation (LE) is a method of connecting LAN users over an ATM
Overview	network which enables them to communicate with each other as if they
	were operating over traditional LANs. LE can be configured in a ATM
	network in several ways:
	Q To connect legacy end stations directly to other legacy systems, as well
	as to servers, routers, switches and other networking devices attached
	to the ATM network.
	Q To connect bridged-LAN environments to each other over ATM. In this
	case the Emulated LAN acts as a bridge on the ATM network.
	Q To connect ATM end stations to each other, enabling communication
	between them.
Emulated LAN	LAN Emulation is implemented as a set of connection services collectively
Components	called an emulated LAN (ELAN). Each ELAN is a composed of a set of LAN
	Emulation Clients (LEC) and a single LAN Emulation Service. The latter
	consists of an LE Configuration Server (LECS), an LE Server (LES), and a
	Broadcast and Unknown Server (BUS). Each LE Client is incorporated in
	an ATM end station, such as a SuperStack II Switch 2700 or 7600 Card,
	and represents a set of LAN users, identified by their MAC addresses. The