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2
G
LOSSARY
Byte
An Octet or 8 bits of data.
Cell
Basic ATM transmission unit. It is a 53-byte packet,
consisting of a 5-byte header and a 48-byte payload.
User traffic is segmented into cells at the source and
reassembled at the destination.
Cell Header
The 5-byte ATM cell header contains control
information regarding the destination path and flow
control.
More specifically it contains the following fields: GFG,
VPI, VCI, PTI, CLP and HEC.
CLP
Cell Loss Priority — A 1-bit field in the ATM cell
header that corresponds to the loss priority of a cell.
Lower priority (CLP = 1) cells can be discarded under
congestion situations.
connectionless
Communications service where packets are
transferred from source to destination without the
need for a pre-established connection.
connection oriented
Communications service where an initial connection
between the end points (source and destination) must
be set up prior to data transmission. ATM and Frame
Relay are Connection Oriented.
E.164
An 8-byte address format. In ATM it is typically used
in public networks and it is provided by the
telecommunication carriers, while 20-byte NSAP
(Network Service Access Point) format addresses are
used within private networks.
EFCI
Explicit Forward Congestion Indication — A 1-bit field
in the PTI that contains information about whether
congestion at an intermediate node has been
experienced. The EFCI bit is set when a threshold (for
example, buffer contents) has been exceeded.
ELAN
Emulated LAN — See
LAN Emulation
.
firewall
Isolation of LAN segments from each other to protect
data resources and help manage traffic.
Flash EPROM
EPROM (Erasable Programmable Read-Only Memory)
technology providing non-volatile storage that can be
electrically erased in the circuit and reprogrammed;
developed by Intel and licensed to other
semi-conductor companies.
Flow Control
A method used in networking for congestion
avoidance and traffic regulation.
Summary of Contents for OPTIONS ATM OC-3c
Page 1: ...8271 Nways Ethernet LAN Switch ATM OC 3c Module User s Guide...
Page 6: ......
Page 10: ...4 ABOUT THIS GUIDE...
Page 23: ...Asynchronous Transfer Mode ATM Layer 2 11 Figure 2 7 Switching Cells using VPI and VCI values...
Page 28: ...2 16 CHAPTER 2 NETWORK LAYER CONCEPTS...
Page 31: ...Extending VLANs into the ATM Network 3 3 Figure 3 3 Extending VLANs into the ATM Network...
Page 32: ...3 4 CHAPTER 3 VIRTUAL LAN CONCEPTS...
Page 39: ...Campus Configuration 5 3 Figure 5 2 Campus and Cost Sensitive Network...
Page 50: ...7 2 CHAPTER 7 ACCESSING MANAGEMENT FEATURES Figure 7 1 Screen Map...
Page 80: ...9 14 CHAPTER 9 MONITORING THE ATM MODULE...
Page 87: ...Safety Notices A 7 IEC 950 SELV SELV...
Page 88: ...A 8 APPENDIX A SAFETY INFORMATION...
Page 90: ...B 2 APPENDIX B SCREEN ACCESS RIGHTS...
Page 94: ...C 4 APPENDIX C ATM MODULE TECHNICAL SPECIFICATIONS...
Page 98: ...D 4 APPENDIX D TROUBLESHOOTING Figure D 1 Troubleshooting Flow Diagram...
Page 120: ...E 2 APPENDIX E TECHNICAL SUPPORT AND SERVICE...
Page 136: ...2 BIBLIOGRAPHY...
Page 140: ...4 INDEX...