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Troubleshooting
Fast Network 10 User Guide Page 6-7
6.5 TROUBLESHOOTING
This section lists several situations that could happen while using the
FN10, and suggests appropriate action. Because every situation is
potentially unique, the corrective actions suggested here should be
considered as guidelines only.
6.5.1 FN10 Does Not Power Up
If your FN10 does not power up, check each one of the following:
• Make sure the power source is operational.
• Make sure the power cord is securely connected.
If the FN10 still does not power up, contact Cabletron Systems Technical
Support. Refer to Section 1.2 for more information.
6.5.2 Connectivity Problems
• Check for LED abnormalities.
• Check port status using LCM.
• Check for loose port connections.
• Check to see if the number of carrier losses is increasing using LCM.
This indicates that the connection is suspect.
• Check to see if the number of total collisions has dramatically
increased using LCM.
Table 6-2 Description of FN10 Buttons
Button Function
Select Cycles through the Segment Status options (TX, RX, Act, Col,
Usr) for all ports. The lower port status LED of the ports you
are monitoring is activated based on what function you chose
with the Select button.
Reset Restarts the system software.
- FAST NETWORK 10 1
- USER GUIDE 1
- Fast Network 10 User Guide i 3
- CONTENTS 7
- FastNET 10 User Guide vii 9
- Contents 10
- CHAPTER 1 11
- INTRODUCTION 11
- 1.2 GETTING HELP 12
- 1.3 DOCUMENT CONVENTIONS 13
- 1.4 RELATED DOCUMENTATION 14
- 1.5 OVERVIEW 14
- Overview 15
- 1.5.1 FN10 Architecture 16
- 1.5.3 FN10 Filtering 20
- 1.5.4.1 FN10 Trunking 21
- Chapter 1: Introduction 22
- 1.5.4.3 Virtual Workgroups 24
- 1.6 LOCAL CONSOLE MANAGER 25
- Reference Card 26
- 1.6.2 Basic LCM Commands 27
- 1.6.2.1 Help 28
- 1.6.2.2 Erase 28
- 1.6.2.3 Exit 29
- 1.6.2.4 Logout 29
- 1.6.2.5 Traplog 29
- CHAPTER 2 31
- UNPACKING AND INSTALLING 31
- YOUR FN10 31
- Port B Port A 32
- FN10 Panels 33
- 2.2 INSTALLING THE FN10 34
- Installing the FN10 35
- FN10 > prompt 37
- ETHERNET MODULE 39
- CHAPTER 3 43
- CONFIGURING YOUR FN10 43
- • Displaying trunking status 44
- • Assigning a community name 44
- 3.1 ASSIGNING IP ADDRESSES 45
- 3.1.1 Displaying IP Addresses 46
- 3.1.2 Deleting an IP Address 46
- 3.1.3 Changing a Subnet Mask 46
- 3.2 ENABLING BRIDGING 47
- 3.3 DISABLING BRIDGING 48
- 3.5 ENABLING TRUNKING 49
- Trunk Groups 50
- 3.6 DISABLING TRUNKING 51
- FN10 > trunk 2-4 52
- Displaying Trunking Status 53
- Workgroup A 54
- Workgroup B 54
- Assigning a Community Name 57
- RCM Reference Guide 58
- 3.11 MODIFYING MIB VARIABLES 59
- 3.11.1 System Contact 59
- 3.11.2 System Name 59
- 3.11.3 System Location 59
- 3.11.5 Aging Parameter 60
- CHAPTER 4 61
- MONITORING AND MANAGING 61
- 4.2.1 Pseudo Filters 63
- 4.2.2 Gathering Statistics 63
- 4.2.3 System Statistics 63
- FN10 Statistics 65
- 4.2.5 MAC Statistics 66
- 4.2.7 SNMP Statistics 67
- 4.3.1 Displaying Status 69
- 4.4 MANAGING THE FN10 74
- 4.5.1 Disabling a Port 75
- 4.5.2 Enabling a Port 76
- 4.5.2.1 noRIP Option 76
- 4.5.3 Changing a Subnet Mask 77
- 4.5.5 Setting the Baud Rate 78
- 4.5.6 Setting a Reboot Time 79
- CHAPTER 5 81
- FN10 FILTERS 81
- 5.1.1 Source Address Filter 83
- 5.2 PORT FILTERS 84
- 5.2.1 Configurable Fields 85
- 5.2.1.1 Pseudo Filtering 86
- 5.2.1.2 Filter Links 86
- Port Filters 87
- Adjoining Network Segment 91
- Computers that cannot 93
- PERFORMANCE 96
- LAN 4LAN 3 97
- 5.5 CONFIGURING A PORT FILTER 99
- Chapter 5: FN10 Filters 100
- Configuring a Port Filter 101
- 5.5.1 Modifying a Port Filter 102
- 5.5.2 Deleting a Port Filter 103
- CONSIDERATIONS 103
- CHAPTER 6 105
- 6.1.1 Power-up LED Sequence 106
- 6.1.2 Specific Power-up Tests 106
- 6.3 DIAGNOSTIC LOOPBACK TESTS 107
- 6.3.1 Loopback Tests 108
- 123456 7 111089 109
- Reset Ready 109
- 6.5 TROUBLESHOOTING 111
- 6.5.1 FN10 Does Not Power Up 111
- 6.5.2 Connectivity Problems 111
- 6.5.3 FN10 Has Rebooted 112
- APPENDIX A 113
- TECHNICAL SPECIFICATIONS 113
- Bridging Technologies 114
- Address Table Size 114
- Management Support 114
- Certification 114
- A.3 10BASE-T PIN ASSIGNMENTS 115
- A.4 STRAIGHT-THROUGH WIRING 116
- A.5 CROSSOVER WIRING 117
- A.6 5 - 4 - 3 RULE 117
- APPENDIX B 119
- GLOSSARY 119
- Appendix B: Glossary 120
- Numerics 129
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