Configuring Lane Into Your Network; Emulated Lan Connections; Control Vccs - 3Com CoreBuilder 7000 Operation Manual

Configuring LANE
Into Your Network
Emulated LAN
Connections

Control VCCs

LANE can be configured in an ATM network in several ways:


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.


To connect bridged-LAN environments to each other over ATM. In this
case the ELAN acts as a bridge on the ATM network.


To connect ATM end stations to each other, enabling communication
between them.
More than one ELAN can operate on the same ATM network. However,
each of the emulated LANs is independent of the others and users cannot
communicate directly across ELAN boundaries.
LECs and LESs communicate with each other by means of ATM virtual
channel connections (VCCs). Control signals and data transmissions are
handled by separate VCCs: Control VCCs and Data VCCs.
Figure 45 Basic LAN Emulation Client Connections
The control VCCs carry control traffic such as LE_ARP requests and
responses. On initialization, control VCCs are established between LEC
and LES (bi-directional control-direct VCC and control-distribute VCC) as
well as a bi-directional configuration VCC between LEC and LECS.
Characteristics of the control VCCs are summarized in Table 36.

Emulated LAN Connections

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