Paradyne 9126-II User Manual Page 291
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8. Troubleshooting
9128-A2-GB20-80 September 2002
8-27
Line Loopback
The Line Loopback (LLB) loops the information received on the selected interface
back to the source of the loopback. When used with a pattern test at the remote
node, LLB determines whether the problem is with the sending device or the T1
facility.
Main Menu
→
Test
→
Network Physical Tests
CAUTION:
This test may affect operation of frame relay PVCs assigned to the
selected port. While in loopback, the frame relay link will be down so any
IP data being sent while this test is active will be disrupted.
An LLB cannot be started when one of the following tests is active:
Payload Loopback, Send Remote Line Loopback, or an active Monitor Pattern
on this network interface.
Repeater Loopback on any other T1 interface with DS0s assigned to this
network interface.
Send Pattern Test on this network interface or any synchronous data port (Port
Use set to Synchronous) assigned to this interface.
Send V.54 or FT1 Loopback, or Data Channel Loopback on any synchronous
data port (Port Use set to Synchronous) assigned to this network interface.
97-15336
The T1
Interface
Other
T1
Interface
LLB
All
1s
Framer
- FrameSaver 1
- 3 Configuration Procedures 4
- 4 Configuration Options 4
- 6 Security and Logins 6
- 7 Operation and Maintenance 6
- 8 Troubleshooting 7
- Activating SLM Features 8
- A Menu Hierarchy 9
- Contents 10
- F Technical Specifications 12
- G Equipment List 12
- About This Guide 13
- Technical Manuals 14
- Technical Glossary 14
- Product-Related Documents 15
- Conventions Used 16
- About the FrameSaver SLV 17
- CSU/DSU-Specific Features 18
- Router-Specific Features 18
- 1. About the FrameSaver SLV 19
- FrameSaver SLM Feature Set 20
- OpenLane SLM System 27
- Logging On 30
- Screen Work Areas 33
- Navigating the Screens 34
- Function Keys 35
- Selecting from a Menu 36
- Selecting a Field 37
- Entering Information 37
- Screen Contents 37
- Navigating the Router’s CLI 38
- Configuration Procedures 39
- Setting Up Auto-Configuration 40
- Options 40
- Configuration Option Areas 41
- Saving Configuration Options 44
- System Information 49
- Setting Up the Modem 50
- Frame Relay Discovery Mode 53
- Automatically 54
- Removing a Circuit 54
- Setting Up Dial Backup 56
- Configuring the 59
- Criteria for Automatic Backup 59
- Modifying ISDN Link Profiles 60
- Management and Communications 62
- SNMP Traps 62
- Changing Operating Mode 63
- Configuration Option Tables 64
- Code Point Definitions 71
- Configuring Service 72
- Level Verification Options 72
- ASCII Text Entry 81
- Data Ports 82
- Physical 82
- Setting Up ISDN Link Profiles 93
- For a BRI DBM: 94
- For a PRI DBM: 94
- Clearing Assignments 104
- For a user data port link: 105
- For a network link: 105
- Display Conditions 105
- Main Menu 108
- Configuration 108
- DLCI Records 108
- For user data port DLCIs: 109
- For network interface DLCIs: 109
- Configuring PVC Connections 112
- ISDN Link Name 113
- Configuring the IP Path List 116
- 4. Configuration Options 117
- Management and Communication 118
- Configuring Management PVCs 121
- General 127
- SNMP Management 127
- Telnet and FTP Session 128
- Configuring SNMP NMS Security 131
- Communication Port 140
- Configuring the Modem Port 144
- Auto Backup Criteria 148
- IP Routing 153
- Address Resolution Protocol 153
- Proxy ARP 153
- Interface Configuration 154
- Network Address Translation 155
- NAT Configuration Example 156
- Procedure 157
- NAPT Configuration Example 158
- 02-17300 162
- DHCP Relay Agent 163
- Router Security 164
- IP Filtering 165
- Land Bug Prevention 165
- Smurf Attack Prevention 165
- Security and Logins 167
- Limiting Access 168
- 6. Security and Logins 170
- Controlling ISDN Access 171
- Limiting Telnet Access 172
- Limiting FTP Access 173
- Controlling SNMP Access 175
- Creating a Login 178
- Modifying a Login 179
- Deleting a Login 179
- Controlling Router CLI Access 180
- Changing Access Levels 181
- Operation and Maintenance 183
- 7. Operation and Maintenance 184
- Displaying System Information 185
- LED Descriptions 190
- (cont'd) 191
- 9128-II 191
- Control Lead Descriptions 193
- Device Messages 194
- (Seen at an FTP 197
- Upgrading System 197
- Software 197
- (FrameSaver SLV 198
- 9128-II only) 198
- Reset COM Port usage 198
- Status Information 200
- System and Test Status 201
- Health and Status Messages 202
- FrameSaver unit 202
- Message What It Indicates 202
- Chapter 8, Troubleshooting 209
- LMI Reported DLCIs 211
- IP Path Connection Status 213
- PVC Connection Status 215
- Time Slot Assignment Status 218
- Timeslot Assignment Status 219
- DBM Interface Status 220
- (continued) 222
- Link Name: 222
- IP Routing Table 230
- Column What It Indicates 231
- Performance Statistics 232
- Service Level Verification 234
- Statistic What It Indicates 235
- DLCI Performance Statistics 239
- Configuring Class of 241
- Service Definitions 241
- Configuration Options 241
- Frame Relay 242
- ESF Line 246
- Clear All Statistics 249
- Ethernet 250
- Trap Event Log 251
- Modem Operation 252
- Verifying Modem Operation 253
- ISDN DBM Operation 254
- Verifying ISDN Lines 256
- FTP File Transfers 257
- Upgrading System Software 259
- Changing Software 261
- Transferring Collected Data 262
- Troubleshooting 265
- Problem Indicators 266
- LMI Packet Capture Utility 270
- Display LMI Trace Log 270
- Viewing the Trap Event Log 278
- Troubleshooting Tables 278
- Restoring 279
- Communication with an 279
- Improperly Configured Unit 279
- Frame Relay PVC Problems 280
- ISDN DBM Problems 281
- Tests Available 282
- Test Timeout Feature 283
- DBM Tests 283
- Starting and Stopping a Test 284
- Aborting All Tests 285
- PVC Tests 286
- PVC Loopback 287
- Send Pattern 288
- Monitor Pattern 288
- Connectivity 289
- Test Call 289
- Physical Tests 290
- Line Loopback 291
- CAUTION: 291
- Payload Loopback 292
- Repeater Loopback 293
- DTE Loopback 294
- Send Line Loopback 295
- Send Remote Line Loopback 297
- IP Ping Test 299
- IP Ping Test – Procedure 1 303
- Lamp Test 304
- Setting Up FrameSaver Support 307
- The Activation Certificate 309
- Scheduling Activations 312
- FrameSaver Devices 315
- Preparation 316
- NetScout Probe User Guide 317
- Verifying Domains and Groups 319
- Correcting Domains and Groups 320
- NetScout Manager/Plus & 321
- Editing Alarms 323
- Adding SLV Alarms Manually 324
- Administrator Guide 324
- Configuring Alarms in 326
- Creating History Files 327
- Statistical Windows Supported 334
- Grouping Elements for Reports 339
- About Service Level Reports 340
- About At-a-Glance Reports 340
- About Trend Reports 341
- Printed Reports 341
- Network Health Reports Guide 344
- Menu Hierarchy 345
- Auto-Configuration 347
- A. Menu Hierarchy 348
- Alarm Defaults 349
- MIB Support 350
- System Group (mib-2) 351
- Interfaces Group (mib-2) 351
- Trap: warmStart 357
- Trap: authenticationFailure 357
- Traps: linkUp and linkDown 358
- Strings: 359
- Traps: enterprise-Specific 361
- Traps: RMON-Specific 364
- Trap: dialControl 365
- RMON Alarm and Event Defaults 366
- Object ID (OID) 375
- Item MIB/Tag 375
- Object ID (OID) Item MIB/Tag 380
- Designations 383
- Pager Command 385
- Access Control Commands 385
- Configuration Commands 386
- Interface Commands 387
- IP Routing Commands 390
- Bridge Commands 391
- out-access-list-200num 392
- ARP Commands 393
- NAT Commands 394
- DHCP Server Commands 397
- DHCP Relay Agent Commands 400
- Filter (access-list) Commands 401
- Diagnostic Commands 405
- Show Commands 407
- Ethernet Type Codes 411
- ICMP Designations 413
- TCP Port Designations 415
- UDP Port Designations 416
- Shortcuts 417
- Show Command Summary 418
- Command Function 419
- CLI Command Summary 420
- CLI Command Default Settings 422
- Connectors, Cables, and Pin 423
- Assignments 423
- 02-17141 424
- 00-16840 424
- 00-16850 425
- COM Port Connector 426
- 98-16166 427
- 98-16167 428
- COM Port-to-Router Cables 429
- Gender Adapter/Changer 432
- DTE Port Connector 433
- Standard V.35 Crossover Cable 434
- DSX-1 Connector 435
- Ethernet Port Connector 438
- Modem Connector 439
- ISDN DBM Connector 439
- Technical Specifications 441
- Specification Criteria 442
- Equipment List 449
- Description 450
- Model/Feature 450
- Numerics 455
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