309978-D Rev 01 D-1
Appendix D
ATM Overview
This appendix describes asynchronous transfer mode (ATM) terminology, as well
as concepts and examples of how your BayStack 450-2M3/2S3 MDAs operate
within a network. The following topics are discussed in this appendix:
• “ATM Terminology” (page D-1)
• “ATM Data Transmission” (page D-5)
• “Configuration Concepts” (page D-6)
• “Configuration Rules” (page D-13)
ATM Terminology
This section defines the ATM-related terms used in this manual. You should
review and understand the ATM terminology before you review the concepts
described in this appendix.
Figure D-1 provides a graphical representation of the
terms described in this section.
LAN Emulation (LANE)
LAN emulation (LANE) refers to the services and protocols defined in the ATM
Forum Technical Committee’s LAN Emulation Over ATM Version 1.0
specification. The LANE protocol allows token ring and Ethernet clients on
LAN-to-ATM bridge/switch devices to communicate transparently across ATM
networks with direct-attached ATM servers and with other LAN clients on other
LAN-to-ATM bridges/switches.
The clients create token ring- or Ethernet-emulated LANs (ELANs) in the ATM
network, and then configure the ATM servers and LAN-to-ATM bridges/switches
to connect to them (see
“Emulated LAN (ELAN)” on page D-3).
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