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Solving Known Problems
D-23
If you have problems that are not addressed by
troubleshooting information in this guide, contact
Technical Support, or your service person. For
Technical Support information refer to Appendix E.
Intermittent failure of a
configured LEC to connect to
the LECS or LES
Symptom:
■
Insufficient resource error
message.
■
LECs fail but seem to
automatically recover.
■
The MAX VPI Bits and MAX VCI Bits
settings are incompatible between ATM
devices. For example, if auto-
configuration is not enabled, and the
MAX VPI/VCI Bits have been set up
incorrectly.
■
Each ATM device supports a separate
and sometimes different pre-set range
of VPI/VCI values. When Signalling tries
to set up the VPI/VCI values for a
connection, it automatically suggests the
next available value in a pre-set range of
values supported by the source Switch.
If the adjacent ATM Switch does not
support these values, it rejects the
connection, and an insufficient resource
error message is displayed.
Example
:
If Switch A supports VPI/VCI values 7:511
and Switch B only supports values up to
7:255, when Signalling tries to set up a
connection using the VPI/VCI value 7:256,
Switch B rejects the connection.
Identify the connection that is causing the problem. The
following steps should be carried out in order:
1
Check that the MAX VPI/VCI Bits are compatible on
the edge-device to ATM Switch User-to-Network
interface (UNI).
2
Check that the MAX VPI/VCI Bit settings are
compatible on all devices between the edge-device
and the LECS.
3
Check that the MAX VPI/VCI Bit settings are
compatible on all ATM devices between the LEC and
the LES.
When you have identified the connection, manually
reconfigure the VPI/VCI values to make them
compatible.
Table D-9
VLAN or ELAN Problems
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...