Hp 2910AL User Manual Page 577
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- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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Troubleshooting
DNS Resolver
Basic Operation
■ When the switch is configured with only the IP address of a DNS
server available to the switch, then a DNS-compatible command,
executed with a fully qualified domain name, can reach a device found
in any domain accessible through the configured DNS server.
■ When the switch is configured with both of the following:
• the IP address of a DNS server available to the switch
• the domain suffix of a domain available to the configured DNS
server
then:
• A DNS-compatible command that includes the host name of a
device in the same domain as the configured domain suffix can
reach that device.
• A DNS-compatible command that includes a fully qualified
domain name can reach a device in any domain that is available
to the configured DNS server.
Example. Suppose the switch is configured with the domain suffix
mygroup.procurve.net and the IP address for an accessible DNS server. If an
operator wants to use the switch to ping a target host in this domain by using
the DNS name “leader” (assigned by a DNS server to an IP address used in
that domain), then the operator can use either of the following commands:
ProCurve# ping leader
10.28.229.220 is alive, time = 1 ms
Host Name for the Desired Host
Ping Response
ProCurve# ping leader.mygroup.procurve.net
Fully Qualified Domain Name for the
10.28.229.220 is alive, time = 1 ms
Desired Host
Ping Response
Figure C-36. Example of Using Either a Host Name or a Fully Qualified Domain Name
In the proceeding example, if the DNS server’s IP address is configured on the
switch, but a domain suffix is either not configured or is configured for a
different domain than the target host, then the fully qualified domain name
must be used.
C-89
- ProCurve Switches 1
- HP ProCurve 2910al Switch 3
- Management and Configuration 3
- 3 Using the Menu Interface 6
- 8 Configuring IP Addressing 10
- 9 Time Protocols 10
- 12 Port Trunking 13
- 13 Port Traffic Controls 14
- A File Transfers 16
- C Troubleshooting 19
- D MAC Address Management 22
- E Monitoring Resources 22
- Product Documentation 23
- Software Feature Index 24
- Intelligent Edge Software 25
- Features 25
- Getting Started 29
- Introduction 30
- Conventions 30
- Command Prompts 31
- Screen Simulations 31
- Sources for More Information 32
- Online Help 34
- Command Line Interface 35
- Web Browser Interface 35
- Need Only a Quick Start? 36
- Network 36
- Advantages of Using the CLI 40
- Interface 41
- Web Browser Interfaces 43
- Shows the current banner 46
- Operating Notes 47
- Using the Menu Interface 49
- Command Line (CLI) option.) 51
- Main Menu Features 55
- 1. VLAN Support 61
- Menu Features List 62
- Where To Go From Here 63
- Accessing the CLI 66
- Using the CLI 66
- Privilege Levels at Logon 67
- Privilege Level Operation 68
- Manager Privileges 69
- How To Move Between Levels 71
- ? symbol lists the 72
- Listing Command Options 74
- Displaying CLI “Help” 75
- Configuration Modes 77
- CLI Control and Editing 80
- For example: 81
- CLI Editing Shortcuts 82
- General Features 86
- Starting a Web Browser 87
- ProCurve Manager Plus (PCM+) 88
- First time install 89
- Browser Interface Session 90
- [Fault Detection] key.) 91
- Using a User Name 93
- If You Lose the Password 93
- Support/Mgmt URLs Feature 95
- Support URL 96
- Port Utilization 100
- Status Reporting Features 101
- Port Status 102
- The Alert Log 103
- Contents 109
- Overview 111
- Using the CLI To Implement 114
- Configuration Changes 114
- Changes 117
- Optional Reboot 119
- Switch Command 119
- Image Options 121
- Will boot from primary flash 122
- Switch Software Downloads 123
- No Undo! 125
- Rebooting the Switch 126
- Setting the Default Flash 128
- Using Reload 129
- Multiple Configuration Files 131
- General Operation 132
- Configuration Enabled 135
- Command Page 136
- Connected Host 144
- Web, and Inbound Telnet 149
- Interface Access 150
- Parameters 150
- and reload 154
- Remote Management Sessions 155
- System Information 157
- (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
- Loopback Interfaces 179
- Downloads 184
- Time Protocols 189
- Operation 191
- Configuring 192
- ■ You want to: 199
- – TIMEP (the default) 205
- Parameter 212
- SNTP Servers 213
- Configured 214
- Port Type 218
- Status of Ports 219
- Flow Control 219
- Broadcast Limit 219
- Configuring Ports 221
- Dynamically updates 225
- Viewing Transceiver Status 226
- Disables per-port flow 230
- ■ 10/100-TX al module ports 232
- ■ Manual MDI 233
- ■ Manual MDI-X 233
- Per-Port MDI 234
- Configuration 234
- Friendly Port 240
- Been Inserted 241
- Configuring UDLD 244
- Enabling UDLD 245
- Viewing UDLD Information 247
- Port 4 is shown as blocked 249
- Introduction to PoE+ 253
- PoE Terminology 254
- PoE Operation 255
- PD Support 256
- Configuring PoE Operation 257
- Controlling PoE Allocation 260
- PoE with LLDP 264
- • Detection Status: 273
- PoE Event Log Messages 278
- Port Trunking 281
- Trunk Configuration Methods 284
- Trunk Group 289
- [Enter] 290
- “Up” Links 294
- Standby Link 294
- [Port Status] 297
- Default Port Operation 301
- LACP Notes and Restrictions 302
- “Trunk” Option 306
- Trunked Links 307
- Port Traffic Controls 311
- Rate-Limiting 313
- Note on Testing 317
- Jumbo Frames 318
- Operating Rules 319
- Configuring IP MTU 324
- SNMP Implementation 324
- Troubleshooting 328
- Applications 329
- SNMP Management Features 332
- SNMP Version 3 Commands 334
- Enabling SNMPv3 335
- SNMPv3 Users 335
- Group Access Levels 339
- SNMPv3 Communities 339
- Two Operator Access Levels 340
- Communities 341
- SNMP Notifications 345
- ■ Access Security Guide: 346
- SNMPv1 and SNMPv2c Traps 347
- Enabling SNMPv2c Informs 349
- SNMPv2c Inform 350
- Enabling Link-Change Traps 356
- ■ SNMP communities 359
- Advanced Management: RMON 361
- Configuring sFlow 362
- Terminology 366
- General LLDP Operation 368
- Configuration Options 369
- LLDP Operating Rules 372
- Configuring LLDP Operation 373
- ■ Chassis ID (TLV) 381
- ■ Port ID (TLV) 381
- TLV-Type > 382
- Advertisements 383
- LLDP-MED Fast Start Control 389
- ■ Voice VLAN ID (VID) 390
- Telephone) Source 402
- Displaying LLDP Statistics 403
- LLDP Operating Notes 405
- LLDP and CDP Data Management 407
- CDP Operation and Commands 409
- ■ show cdp displays 412
- File Transfers 413
- Downloading Switch Software 415
- [E] (for Edit) 417
- [Enter] to begin 418
- Using Secure Copy and SFTP 421
- The SCP/SFTP Process 422
- Command Options 425
- Authentication 426
- SCP/SFTP Operating Notes 426
- Primary or Secondary Flash 430
- [Send] button 431
- Switch-to-Switch Download 433
- Copying Software Images 436
- ProCurve# show tech custom 440
- No SHOW-TECH file found 440
- Host, USB Device, PC or UNIX 447
- Workstation 447
- Using USB Autorun 451
- Security Considerations 452
- Enabling Secure Mode 454
- Status and Counters Data 460
- General System Information 462
- Menu Access 465
- Control Status 467
- Group Statistics 470
- [Enter]. The address 472
- Prompt for Selecting 473
- CLI Access to MSTP Data 475
- VLAN Information 477
- [Y]) to select Yes 481
- Use the Space bar to 482
- Monitored Ports 484
- Locating a Device 487
- Troubleshooting Approaches 493
- Unusual Network Activity 496
- ACL Problems 497
- IGMP-Related Problems 501
- LACP-Related Problems 502
- Mesh-Related Problems 502
- QoS-Related Problems 505
- Radius-Related Problems 505
- Problems 506
- SSH-Related Problems 507
- TACACS-Related Problems 509
- VLAN-Related Problems 511
- Fan Failure 513
- Switch Problems 514
- Key Action 523
- Event Log and SNMP Messages 524
- Log Throttle Periods 525
- Example of Log Throttling 525
- Debug/Syslog Operation 528
- ■ Up to six Syslog servers 529
- Destinations 536
- Debug Command 537
- Debug Destinations 539
- Logging Command 540
- Configuring a Syslog Server 541
- Diagnostic Tools 547
- Port Auto-Negotiation 548
- Ping and Link Tests 548
- CLI: Ping Test 550
- Link Tests 551
- Traceroute Command 552
- Syntax: kill 567
- Restoring a Flash Image 573
- ■ 8 Bits 574
- DNS Resolver 576
- Basic Operation 577
- Configuring a DNS Entry 579
- First-Hop Router (“B”) 581
- Traceroute Target 581
- Event Log Messages 584
- MAC Address Management 585
- Determining MAC Addresses 587
- All Models 589
- Viewing the MAC Addresses of 591
- Connected Devices 591
- Monitoring Resources 593
- Policy Enforcement Engine 594
- Available 598
- ■ Alaska 599
- ■ Canada and Continental US 599
- ■ Southern Hemisphere 599
- ■ Western Europe 599
- Symbols 603
- Numerics 603
- 2 – Index 604
- Index – 3 605
- 4 – Index 606
- Index – 5 607
- 6 – Index 608
- Index – 7 609
- 8 – Index 610
- Index – 9 611
- 10 – Index 612
- Index – 11 613
- 12 – Index 614
- Index – 13 615
- 14 – Index 616
- Development Company, L.P 618
- February 2009 618
- Manual Part Number 618
- 5992-5437 618
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