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Cisco Intrusion Prevention System Appliance Hardware Installation Guide for IPS 7.1
OL-24002-01
Appendix E Troubleshooting
Troubleshooting the Appliance
When you receive the errors that the Analysis Engine is busy, wait a while before trying to make
configuration changes. Use the show statistics virtual-sensor command to find out when the Analysis
Engine is available again.
Communication Problems
This section helps you troubleshoot communication problems with the sensor. It contains the following
topics:
• Cannot Access the Sensor CLI Through Telnet or SSH, page E-25
• Correcting a Misconfigured Access List, page E-27
• Duplicate IP Address Shuts Interface Down, page E-28
Cannot Access the Sensor CLI Through Telnet or SSH
If you cannot access the sensor CLI through Telnet (if you already have it enabled) or SSH, follow these
steps:
Step 1 Log in to the sensor CLI through a console, terminal, or module session.
Step 2 Make sure that the sensor management interface is enabled. The management interface is the interface
in the list with the status line
Media Type = TX. If the Link Status is Down, go to Step 3. If the Link Status
is
Up, go to Step 5.
sensor# show interfaces
Interface Statistics
Total Packets Received = 0
Total Bytes Received = 0
Missed Packet Percentage = 0
Current Bypass Mode = Auto_off
MAC statistics from interface GigabitEthernet0/1
Media Type = backplane
Missed Packet Percentage = 0
Inline Mode = Unpaired
Pair Status = N/A
Link Status = Up
Link Speed = Auto_1000
Link Duplex = Auto_Full
Total Packets Received = 0
Total Bytes Received = 0
Total Multicast Packets Received = 0
Total Broadcast Packets Received = 0
Total Jumbo Packets Received = 0
Total Undersize Packets Received = 0
Total Receive Errors = 0
Total Receive FIFO Overruns = 0
Total Packets Transmitted = 0
Total Bytes Transmitted = 0
Total Multicast Packets Transmitted = 0
Total Broadcast Packets Transmitted = 0
Total Jumbo Packets Transmitted = 0
Total Undersize Packets Transmitted = 0
Total Transmit Errors = 0
Total Transmit FIFO Overruns = 0
MAC statistics from interface GigabitEthernet0/0
Media Type = TX
Link Status = Up
- Text Part Number: OL-24002-01 1
- CONTENTS 3
- B Initializing the Sensor B-1 7
- C Obtaining Software C-1 7
- E Troubleshooting E-1 9
- Contents 10
- OL-24002-01 10
- F Cable Pinouts F-1 12
- About This Guide 13
- Organization 14
- Conventions 14
- Related Documentation 15
- Submitting a Service Request 16
- Introducing the Sensor 17
- How the Sensor Functions 18
- Your Network Topology 19
- Tuning the IPS 19
- Sensor Interfaces 20
- Command and Control Interface 21
- Sensing Interfaces 22
- Interface Support 22
- TCP Reset Interfaces 27
- Interface Restrictions 28
- Interface Modes 30
- Figure 1-2 Promiscuous Mode 31
- • Monitor session 31
- Inline Interface Pair Mode 32
- Inline VLAN Pair Mode 32
- VLAN Group Mode 33
- Supported Sensors 34
- Table 1-4 Supported Sensors 35
- IPS Appliances 36
- Appliance Restrictions 37
- The Sensor and Time Sources 39
- Step 1 Log in to the sensor 40
- Time Sources and the Sensor 42
- Installation Preparation 43
- Safety Recommendations 44
- Safety Recommendations 45
- Working in an ESD Environment 46
- General Site Requirements 47
- Power Supply Considerations 48
- Configuring Equipment Racks 48
- Installing the IPS 4270-20 49
- Supported Interface Cards 52
- Hardware Bypass 53
- 4GE Bypass Interface Card 54
- • AC power present 60
- • Standby mode 60
- Diagnostic Panel 62
- Rail System Kit Contents 65
- < 28.5” 68
- For threaded-hole racks: 70
- Installing the IPS 4270-20 84
- Installing and Removing Fans 98
- Product Overview 102
- Specifications 102
- Specifications 103
- Accessories 104
- Front and Back Panel Features 105
- Rack Mount Installation 109
- Rack Mount Installation 110
- For More Information 111
- 11 2 3 4 117
- Installing DC Input Power 121
- Statement 122 123
- • Ground lead wire (middle) 124
- Figure 4-19 Ground Wires 124
- Chassis Features 131
- Cisco ASA 5585-X IPS SSP 132
- Cisco IPS 4520 132
- Chassis Features 135
- Memory Configurations 139
- Supported SFP/SFP+ Modules 139
- Table 5-7 SFP/SFP+ Modules 140
- SFP/SFP+ 141
- Package Contents 150
- Step 13 Power on the sensor 160
- Step 1 Power off the sensor 161
- Memory Specifications 168
- Indicators 169
- Removing the ASA 5500 AIP SSM 171
- Front Panel Features 176
- Memory Requirements 180
- SFP/SFP+ Modules 181
- Installing SFP/SFP+ Modules 183
- Logging In to the Sensor 189
- Logging In to the Appliance 190
- Logging In to the Sensor 196
- Initializing the Sensor 197
- Simplified Setup Mode 198
- System Configuration Dialog 198
- Use NTP?[no]: yes 199
- Basic Sensor Setup 200
- Advanced Setup 203
- Step 29 Reboot the appliance 208
- Verifying Initialization 221
- Verifying Initialization 223
- Obtaining Software 225
- IPS 7.1 Files 226
- IPS Software Versioning 227
- IPS-[sig]-[S]-req-E1.pkg 228
- IPS Software Release Examples 229
- Accessing IPS Documentation 231
- Understanding Licensing 232
- Installing the License Key 236
- Uninstalling the License Key 238
- Upgrading the Sensor 243
- Upgrade Notes and Caveats 244
- Manually Upgrading the Sensor 244
- Downgrading the Sensor 251
- Installing System Images 253
- TFTP Servers 254
- Installing System Images 270
- Troubleshooting 271
- Cisco Bug Search 272
- Preventive Maintenance 272
- Creating the Service Account 275
- Disaster Recovery 276
- Recovering the Password 277
- Using the GRUB Menu 278
- Using ROMMON 279
- Using the ASDM 281
- Disabling Password Recovery 283
- Time Sources and the Sensor 285
- The ASA IPS Modules 286
- Correcting Time on the Sensor 287
- Supported MIBs 288
- Troubleshooting the Appliance 292
- Analysis Engine is Busy 294
- Communication Problems 295
- Step 1 Log in to the CLI 298
- The SensorApp and Alerting 299
- Unable to See Alerts 302
- Check for alerts 303
- Sensor Not Seeing Packets 304
- Blocking 306
- Verifying ARC is Running 307
- Device Access Issues 310
- Enabling Debug Logging 315
- Step 11 View the zone names 316
- Zone Names 319
- Software Upgrades 322
- Issues With Automatic Update 323
- Troubleshooting the IDM 325
- Troubleshooting the IME 327
- Not Supported Error Message 328
- Installation Error 328
- Health and Status Information 329
- Failover Scenarios 331
- Configuration Examples 332
- IPS Reloading Messages 334
- • 1300.0 337
- • 1304.0 337
- • 1305.0 337
- IPS Not Loading 340
- Gathering Information 347
- Tech Support Information 348
- Varlog Files 349
- Tech Support Command Output 350
- Version Information 352
- Statistics Information 355
- Displaying Statistics 356
- Interfaces Information 367
- Events Information 368
- Sensor Events 369
- Displaying Events 369
- Clearing Events 372
- Gathering Information 374
- Cable Pinouts 375
- Console Port (RJ-45) 376
- RJ-45 to DB-9 or DB-25 377
- Appendix F Cable Pinouts 378
- RJ-45 to DB-9 or DB-25 378
- Numerals 379
- Glossary 380
- Numerics 405
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