3com 7600 Benutzerhandbuch
12
ATM, LAN E
MULATION
,
AND
V
IRTUAL
LAN
S
This chapter provides basic concepts and information about:
Q
ATM Overview
Q
Virtual Channels
Q
Interim Local Management Interface (ILMI)
Q
LAN Emulation Overview
Q
Emulated LAN Components
Q
Emulated LAN Connections
Q
Bridges in the 7600 Card
Q
Data Transmission over an Emulated LAN
Q
LEC Parameters
Q
Virtual LANs Overview
Q
Virtual LANs in the 7600 Card
ATM Overview
The Asynchronous Transfer Mode (ATM) is a telecommunications method
for carriage of a complete range of user traffic, including voice, video and
data. Defined by CCITT and ANSI standards, it facilitates multi-media
networking between high-speed devices at multi-megabit speeds.
for carriage of a complete range of user traffic, including voice, video and
data. Defined by CCITT and ANSI standards, it facilitates multi-media
networking between high-speed devices at multi-megabit speeds.
Using this connection-oriented, switched networking technology, virtual
channels may be set up to support multiple applications through the
same physical connection. The switching technology enables dedicated
bandwidth for each application, overcoming the restrictions that exist in a
shared-media networking technology, like Ethernet, Token Ring and FDDI.
ATM allows different types of physical layer technology to share the same
lower layer – the ATM layer.
channels may be set up to support multiple applications through the
same physical connection. The switching technology enables dedicated
bandwidth for each application, overcoming the restrictions that exist in a
shared-media networking technology, like Ethernet, Token Ring and FDDI.
ATM allows different types of physical layer technology to share the same
lower layer – the ATM layer.
abtthgde.book Page 1 Tuesday, June 23, 1998 10:29 AM