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193Fabric OS Procedures Version 3.1.x/4.1.x User Guide
9
Troubleshooting
This chapter provides information on troubleshooting and the most common
procedures used to diagnose and repair issues.
This chapter provides the following information.
■ About Troubleshooting, page 194
■ Gathering Information for Technical Support, page 198
The following specific scenarios are described to provide examples of
Troubleshooting techniques:
■ Host Can Not See Target (Storage or Tape Devices), page 199
■ Fabric Segmentation, page 203
■ Zoning Setup Issues, page 206
■ Fabric Merge Conflicts Related to Zoning, page 207
■ MQ-WRITE Error, page 209
■ I2C bus Errors, page 210
■ Device Login Issues, page 212
■ Watchdog (Best Practices), page 216
■ Identifying Media-Related Issues, page 218
■ Link Failure, page 229
■ Marginal Links, page 234
- 3.1.x/4.1.x 1
- Third Edition (June 2003) 2
- Part Number: AA–RS23C–TE 2
- Contents 10
- Initial Configuration 13
- Power on the Switch 14
- Configuring the IP Addresses 14
- Initial Setup Example 19
- Switch Login 21
- Customize the Switch Name 24
- Manage Licensed Features 25
- Activating a License 26
- Verifying License Activation 26
- Configure Fabric Parameters 28
- Configure Software Features 30
- Verify Switch Function 31
- Connect ISLs to Switch 33
- Connect Devices to the Switch 35
- Basic Switch Management 39
- Enabling a Switch 40
- Disabling a Switch 40
- Disabling a Port 41
- Example: Core Switch 2/64 42
- Enabling a Port 43
- Switch 2/32 44
- Example: SAN Switch 2/32 44
- Domain IDs 47
- Setting a Domain ID 48
- Firmware Versions 49
- Switch Date and Time 51
- Fabric Configuration Settings 53
- Switch Names 57
- Switch Status Policies 58
- Tracking Switch Changes 63
- Using Dynamic Load-Sharing 66
- Help Commands 71
- Additional Help Topics 72
- Hexadecimal Port Diagrams 73
- 5 = 0101 D = 1101 74
- 6 = 0110 E = 1110 74
- 7 = 0111 F = 1111 74
- Firmware Download 75
- About Firmware Downloads 76
- The Firmware Upgrade Process 78
- 4.0.0c or less 84
- New Features 93
- Listeners 95
- Passwords 97
- Devices: 98
- Switch Access: 98
- Managing Passwords 99
- Setting Recovery Passwords 100
- Basic Security in FOS 101
- Frequently Asked Questions 106
- Working With the Core 109
- Switch 2/64 109
- Ports on the Core Switch 2/64 110
- About the Slot/Port Method 111
- Basic Blade Management 115
- Enabling a Blade 116
- Powering On a Blade 116
- Powering Off a Blade 116
- Core Switch 2/64 Chassis 118
- ■ DISABLED 119
- ■ FAULTY 119
- ■ UNKNOWN 119
- Blade Beacon Mode 123
- The SAN Management 125
- Application 125
- The Management Server 126
- Example: 128
- To delete a WWN from the ACL: 130
- *MS feature is disabled 138
- PID Addressing 139
- Overview 140
- Example Scenarios 142
- About Core PID Addressing 143
- Recommendations 145
- About PID Mapping 146
- Evaluate the Fabric 148
- Analyzing Data 149
- Performing Empirical Testing 150
- Planning the Update Procedure 151
- Hybrid Update 153
- Basic Update Procedures 154
- AIX Procedure 158
- Diagnostics and Status 161
- Diagnostics Overview 162
- Persistent Error Log 165
- Clearing the Switch Error Log 167
- Syslog Daemon 171
- Message Classification 172
- Syslogd CLI Commands 173
- Configuring syslogd 173
- Switch Diagnostics 176
- Port Diagnostics 181
- Hardware Diagnostics 187
- ■ camtest 189
- ■ centralMemoryTest 189
- ■ cmemRetentionTest 189
- ■ cmiTest 189
- Linux Root Capabilities 191
- Troubleshooting 193
- About Troubleshooting 194
- Fibre Channel Process 195
- Most Common Problem Areas 196
- Specific Scenarios 199
- Fabric Segmentation 203
- About Fabric Parameters 203
- Domain ID Conflicts 204
- Restore a Segmented Fabric 204
- Zoning Setup Issues 206
- Prevention 207
- Verify Fabric Merge Problem 208
- Edit Zone Config Members 208
- MQ-WRITE Error 209
- I2C bus Errors 210
- Device Login Issues 212
- Watchdog (Best Practices) 216
- Component Tests Overview 218
- Check Switch Components 219
- BadOrdSet, DiscC3 224
- Additional Component Tests 228
- Link Failure 229
- Port’s Physical State 230
- Speed Negotiation Failure 230
- Marginal Links 234
- Isolating the Areas 235
- Ruling Out Cabling Issues 236
- Glossary 237
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