HP PROCURVE 2520 Manual do Utilizador Página 490
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Troubleshooting
Diagnostic Tools
Intermediate router hops
with the time taken for the
switch to receive
acknowledgement of
each probe reaching each
router.
Destination IP Address
Figure C-16. Example of a Completed Traceroute Enquiry
Continuing from the previous example (Figure C-16, above), executing
traceroute with an insufficient maxttl for the actual hop count produces an
output similar to this:
Traceroute does not reach
destination IP address
because of low maxttl
setting.
The asterisk indicates there was a
timeout on the second probe to the third
hop.
Figure C-17. Example of Incomplete Traceroute Due to Low Maxttl Setting
C-56
- HP ProCurve Switch Software 1
- HP ProCurve 2520 Switches 3
- Management and Configuration 3
- 3 Using the Menu Interface 6
- 8 Configuring IP Addressing 10
- 9 Time Protocols 11
- 12 Port Trunking 13
- A File Transfers 15
- C Troubleshooting 18
- D MAC Address Management 20
- F Power-Saving Features 20
- Product Documentation 21
- Software Feature Index 22
- Getting Started 25
- Introduction 26
- Conventions 26
- Command Prompts 27
- Screen Simulations 27
- Sources for More Information 28
- Online Help 30
- Command Line Interface 31
- Web Browser Interface 31
- Need Only a Quick Start? 32
- Network 32
- Advantages of Using the CLI 36
- Interface 37
- ■ Telnet 40
- ■ serial connection 40
- ■ SSHv2 40
- ■ Web browser 40
- Using the Menu Interface 45
- Command Line (CLI) option.) 47
- Main Menu Features 51
- 1. VLAN Support 57
- Menu Features List 58
- Where To Go From Here 59
- Accessing the CLI 62
- Using the CLI 62
- Privilege Levels at Logon 63
- Privilege Level Operation 64
- Manager Privileges 65
- How To Move Between Levels 67
- ? symbol lists the 68
- Listing Command Options 70
- Displaying CLI “Help” 71
- Configuration Modes 73
- CLI Control and Editing 76
- For example: 77
- Using a Command Alias 78
- CLI Editing Shortcuts 81
- General Features 85
- Starting a Web Browser 86
- ProCurve Manager Plus (PCM+) 87
- First time install 88
- Browser Interface Session 89
- [Fault Detection] key.) 90
- Using a User Name 92
- If You Lose the Password 92
- Support/Mgmt URLs Feature 94
- Support URL 95
- Port Utilization 99
- Status Reporting Features 100
- Port Status 101
- The Alert Log 102
- Contents 107
- Overview 109
- Configuration Changes 112
- Using the CLI To Implement 112
- Changes 115
- Optional Reboot 117
- Switch Command 117
- Image Options 119
- Will boot from primary flash 120
- Switch Software Downloads 121
- No Undo! 123
- Rebooting the Switch 124
- Setting the Default Flash 126
- Using Reload 127
- Multiple Configuration Files 129
- General Operation 130
- Configuration Enabled 133
- Command Page 134
- Connected Host 142
- DHCP Option 66 143
- CLI Command 144
- Operating Notes 145
- Log Messages 145
- Web, and Inbound Telnet 149
- Interface Access 150
- Parameters 150
- and reload 154
- Remote Management Sessions 155
- System Information 157
- New hostname, contact 160
- (config)# time timezone -480 162
- [System Info] 163
- [Apply Changes] 163
- [?] in the web 163
- Configuring IP Addressing 165
- IP Configuration 166
- Live (TTL) 169
- [IP Configuration] 174
- DHCP/Bootp Operation 176
- ■ For Bootp operation: 178
- ■ For DHCP operation: 178
- Downloads 180
- Time Protocols 185
- Operation 187
- Configuring 188
- ■ You want to: 195
- – TIMEP (the default) 201
- Parameter 208
- SNTP Servers 209
- Configured 210
- Port Type 214
- Status of Ports 215
- Flow Control 215
- Broadcast Limit 215
- Configuring Ports 217
- Error Messages 223
- Viewing Transceiver Status 224
- Been Inserted 238
- Related Publications 242
- Terminology 242
- PoE Operation 243
- Power Priority Operation 244
- Configuring PoE Operation 245
- Indicates PoE support for 246
- Controlling PoE Allocation 248
- Maximum 250
- Cycling Power on a Port 252
- Information 253
- Configuration 259
- PoE Event Log Messages 260
- Port Trunking 263
- Trunk Configuration Methods 266
- Trunk Group 271
- [Enter] 272
- “Up” Links 276
- Standby Link 276
- [Port Status] 279
- Default Port Operation 283
- LACP Notes and Restrictions 284
- “Trunk” Option 288
- Trunked Links 289
- Applications 293
- SNMP Management Features 296
- SNMP Version 3 Commands 298
- Enabling SNMPv3 299
- SNMPv3 Users 299
- Group Access Levels 303
- SNMPv3 Communities 303
- Two Operator Access Levels 304
- Communities 305
- SNMP Notifications 309
- ■ Access Security Guide: 310
- SNMPv1 and SNMPv2c Traps 311
- Enabling SNMPv2c Informs 313
- SNMPv2c Inform 314
- Enabling Link-Change Traps 320
- ■ SNMP communities 323
- SNMP Community 324
- Link-change 324
- Advanced Management: RMON 325
- General LLDP Operation 329
- Configuration Options 330
- LLDP Operating Rules 333
- Configuring LLDP Operation 334
- ■ Chassis ID (TLV) 342
- ■ Port ID (TLV) 342
- TLV-Type > 343
- Advertisements 344
- LLDP-MED Fast Start Control 350
- Telephone) Source 363
- Displaying LLDP Statistics 364
- LLDP Operating Notes 366
- LLDP and CDP Data Management 368
- CDP Operation and Commands 370
- ■ show cdp displays 373
- File Transfers 375
- Downloading Switch Software 377
- [E] (for Edit) 379
- [Enter] to begin 380
- Using Secure Copy and SFTP 383
- The SCP/SFTP Process 384
- Command Options 387
- Authentication 388
- SCP/SFTP Operating Notes 388
- Primary or Secondary Flash 392
- Switch-to-Switch Download 393
- Copying Software Images 396
- ProCurve# show tech custom 399
- No SHOW-TECH file found 399
- Host, PC or UNIX Workstation 402
- Status and Counters Data 408
- General System Information 410
- Menu Access 412
- CLI Access 413
- Control Status 415
- Group Statistics 417
- [Enter]. The address 419
- Prompt for Selecting 420
- CLI Access to MSTP Data 422
- VLAN Information 424
- [Y]) to select Yes 428
- Monitored Ports 430
- Locating a Device 432
- Troubleshooting 435
- Troubleshooting Approaches 439
- Unusual Network Activity 442
- IGMP-Related Problems 443
- LACP-Related Problems 444
- QoS-Related Problems 447
- Radius-Related Problems 448
- Problems 449
- SSH-Related Problems 450
- TACACS-Related Problems 451
- VLAN-Related Problems 453
- Fan Failure 455
- Switch Problems 456
- Event Log and SNMP Messages 464
- Log Throttle Periods 465
- Debug/Syslog Operation 466
- Caution 470
- Debug Command 472
- Debug Destinations 474
- Logging Command 475
- Diagnostic Tools 483
- Port Auto-Negotiation 484
- Ping and Link Tests 484
- CLI: Ping Test 486
- Link Tests 487
- Traceroute Command 488
- Syntax: alias 500
- Restoring a Flash Image 502
- DNS Resolver 505
- Configuring a DNS Entry 508
- First-Hop Router (“B”) 510
- Traceroute Target 510
- Event Log Messages 513
- MAC Address Management 515
- Determining MAC Addresses 517
- Viewing the MAC Addresses of 520
- Connected Devices 520
- ■ Alaska 521
- ■ Canada and Continental US 521
- ■ Southern Hemisphere 521
- ■ Western Europe 521
- Power-Saving Features 525
- Show Savepower Status 526
- Symbols 527
- Numerics 527
- 2 – Index 528
- Index – 3 529
- 4 – Index 530
- Index – 5 531
- 6 – Index 532
- Index – 7 533
- 8 – Index 534
- Index – 9 535
- 10 – Index 536
- Index – 11 537
- 12 – Index 538
- Index – 13 539
- 14 – Index 540
- Index – 15 541
- 16 – Index 542
- ProCurve 5400zl Switches 544
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