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D-22
A
PPENDIX
D: T
ROUBLESHOOTING
VLAN or ELAN Problems
Table D-9
VLAN or ELAN Problems
Problem
Possible Causes
Possible Solutions
The configured LECs cannot
communicate with each
other
Possible symptom:
The
Last LEC Failure Reasons,
described in Table D-4
on
page
D-12,
is
LE_CONFIGURE
or
similar error type
.
■
The devices that need to communicate
are not in the same VLAN/ELAN.
■
Check that the ELAN name has been set up correctly.
■
Check LAN Emulation supported on the ATM Switch.
The ATM Switch must use LAN Emulation Version 1.0.
■
Check that the correct VPI/VCI are used and that
there they have not been mismatched. Refer to
“
Intermittent failure of a configured LEC to connect
to the LECS or LES
” below.
■
Ensure that both LECs are within the same
VLAN/ELAN. LECs not in the same VLAN/ELAN can
only communicate using a router.
Insufficient Resources
■
Excessive traffic is overloading the ATM
device, and it does not have sufficient
resources to assign new connections.
■
A LEC requires a separate connection for
each LEC with which it needs to
communicate. If you try to bring up all of
the connections at the same time, the
ATM Module may run out of connections.
■
You may need to reconfigure or restructure your
network. For example, you may wish to use a
separate ATM Switch for LECS functionality.
■
Do not try to bring up too many connections at the
same time.
■
You may need to reconfigure or restructure your
network.
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...