What is LAN Emulation (LANE)?
2-5
Joining the ELAN
Before a LAN Emulation Client (LEC) can transmit any
Ethernet frames onto the ATM network it must first
join an ELAN. To join the ELAN:
1
The LEC must know the name of the ELAN it is to
join.
The ELAN name is specified through the management
software on the Switch.
2
The LEC must communicate with the LAN
Emulation Server (LES) that is serving that ELAN.
To communicate with the LES, the LEC must first
locate the LES. The LEC can find the ATM address of
the LES in one of the following ways:
■
If there is a LAN Emulation Configuration Server
(LECS) on the network, the LEC gets the address of
the LES from the LECS.
The way in which the LECS determines which LES
the LEC needs to communicate with, depends on
the
policy
that the LECS is running. Refer to the
user guide that accompanies your LECS for more
details of the policies your LECS uses.
■
If the network does not have a LECS, the LEC gets
the LES address from the management software
on the ATM device.
3
The LEC must have a connection to the
Broadcast and Unknown Server (BUS).
When the LEC has joined the LES, the LES helps the
LEC locate the
Broadcast and Unknown Server
(BUS)
associated with that ELAN.
Locating the LECS
Before the LEC can ask the LECS for the address of
the LES, the LEC must first locate the LECS. There are
three ways in which the LEC can locate the LECS, and
the LEC tries these methods in the following order:
■
The LEC can ask the adjacent ATM Switch using
the
Interim Local Management Interface (ILMI)
.
■
The LEC can use a well known ATM address that is
reserved for the LECS. The well known address is
pre-programmed into most LECS devices. The well
known address is:
47007900000000000000000000:00A03E000001:00
■
The LEC can use a reserved
Permanent Virtual
Circuit (PVC)
which the ATM Switch has already
routed to the LECS. The reserved PVC is
VPI 0, VCI 17.
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...