
Configuring ATM Services
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Hardware Devices
Bay Networks provides various ATM hardware devices, each of which provides a
different form of access within the ATM network. The ATM sample network in
this appendix uses the following ATM hardware devices:
• LattisCell switches
• EtherCell switch
• Centillion 100 switch
• Backbone Node containing an ATM ILI pair
In addition to the Bay Networks equipment, the example requires UNIX
workstations to operate ATM network control software.
Function of the LattisCell Switch
Working in conjunction with network control software, the LattisCell switch acts
as the backbone of the ATM network (refer to Figure 2-10). Multiple LattisCells
can interconnect using network-to-network interface (NNI) links. These
interconnecting LattisCells form larger ATM networks called ATM domains.
In addition to linking together with other switches, the LattisCell can also connect
to user-to-network interface (UNI) clients. UNI clients (for example, routers,
hubs, servers, and workstations equipped with ATM interfaces) reside on the edge
of an ATM network. Some of these UNI clients (that is, the routers, hubs, and
servers) can connect to other local or wide area networks.
For additional information regarding LattisCell features and how to install and use
the LattisCell, refer to Using the Model 101xx LattisCell ATM Switch.
Function of the EtherCell Switch
The EtherCell Ethernet-to-ATM switch connects existing Ethernet networks or
endstations to ATM networks using high-speed data switching. This device
supports twelve 10Base-T Ethernet interfaces and one ATM SONET/SDH
(155 Mb/s) UNI interface.
The EtherCell performs the following five primary functions:
• Registers its interfaces with the Connection Management System (CMS)
• Sets up and clears calls through the CMS
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