3Com 4500 - Troubleshooting Ethernet Port Configuration

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Troubleshooting Ethernet Port Configuration

Symptom: Fail to configure the default VLAN ID of an Ethernet port.

Solution: Take the following steps:

z Use the display interface or display port command to check if the port is a trunk port or a hybrid

port.

z If the port is not a trunk or hybrid port, configure it to be a trunk or hybrid port.

z Configure the default VLAN ID of the port.

Main Page

About this Manual3
- Configuration Guide1
- Table of Contents3
- Obtaining Documentation5
- Related Documentation5
- Login6
- Logging in to an Ethernet Switch8
  - Introduction to the User Interface8
- Logging in through the Console Port11
- Logging in through Telnet23
- Logging in Using a Modem34
- CLI Configuration38
- Logging in through NMS53
  - Introduction53
  - Connection Establishment Using NMS53
- Configuring Source IP Address for Telnet Service Packets54
  - Overview54
  - Displaying Source IP Address Configuration55
- User Control56
Configuration File Management63
- Configuration File Management64
  - Introduction to Configuration File64
  - Configuration Task List65
VLAN Overview/Vlan Configuration69
- 1 VLAN Overview70
- 2 VLAN Configuration76
IP Addressing Configuration/Ip Performance Optimization Configuration83
- 1 IP Addressing Configuration84
- 2 IP Performance Optimization Configuration90
Voice VLAN Configuration94
- Voice VLAN Configuration95
- Voice VLAN Overview95
- Voice VLAN Configuration101
- Displaying and Maintaining Voice VLAN104
- Voice VLAN Configuration Example105
  - Voice VLAN Configuration Example (Automatic Voice VLAN Assignment Mode)105
  - Voice VLAN Configuration Example (Manual Voice VLAN Assignment Mode)107
Port Basic Configuration109
- Ethernet Port Configuration110
- Port Basic Configuration110
- Ethernet Port Configuration Example118
- Troubleshooting Ethernet Port Configuration119
Link Aggregation Configuration120
- Link Aggregation Configuration121
- Overview121
- Link Aggregation Classification122
- Aggregation Group Categories125
- Link Aggregation Configuration126
- Displaying and Maintaining Link Aggregation Configuration129
- Link Aggregation Configuration Example129
  - Ethernet Port Aggregation Configuration Example129
- Port Isolation132
Port Security Configuration136
- Port Security Configuration137
- Port Security Overview137
- Port Security Configuration Task List140
- Displaying and Maintaining Port Security Configuration146
- Port Security Configuration Examples146
  - Port Security Configuration Example146
Dldp148
- DLDP Configuration149
- Overview149
- DLDP Fundamentals150
- DLDP Configuration157
- DLDP Configuration Example159
Mac Address Table Management161
- MAC Address Table Management162
- Overview162
- MAC Address Table Management165
- Displaying MAC Address Table Information168
- Configuration Examples169
  - Adding a Static Mac Address Entry Manually169
Auto Detect Configuration170
- Auto Detect Configuration171
- Introduction to the Auto Detect Function171
- Auto Detect Configuration Examples174
  - Configuration Example for Auto Detect Implementation with Static Routing174
  - Configuration Example for Auto Detect Implementation with VLAN Interface Backup175
Mstp177
- Overview179
- MSTP Configuration Task List193
- Configuring Root Bridge194
- Configuring Leaf Nodes207
- Performing Mcheck Operation211
- Configuring Guard Functions212
- Configuring Digest Snooping216
  - Introduction216
- Configuring Rapid Transition218
  - Introduction218
  - Configuring Rapid Transition220
- Enabling Trap Messages Conforming to 802.1D Standard221
- MSTP Maintenance Configuration221
- Displaying and Maintaining MSTP222
- MSTP Configuration Example222
Table of Contents225
- 1 IP Routing Protocol Overview227
- 2 Static Route Configuration232
- 3 RIP Configuration236
- 4 IP Route Policy Configuration247
Common Multicast Configuration/Igmp Snooping Configuration256
- Default Chapter258
- 2 Common Multicast Configuration270
- 3 IGMP Snooping Configuration273
Table of Contents295
- 802.1X Configuration297
- 2 Quick EAD Deployment Configuration319
- 3 HABP Configuration323
- 4 System Guard Configuration325
Table of Contents328
- 1 Aaa Overview329
  - Introduction to AAA329
  - Introduction to AAA Services330
    - Introduction to RADIUS330
- 2 AAA Configuration335
- 3 EAD Configuration358
Mac Address Authentication Configuration362
- MAC Address Authentication Configuration363
- MAC Address Authentication Overview363
  - Performing MAC Address Authentication on a RADIUS Server363
  - Performing MAC Address Authentication Locally363
- Configuring Basic MAC Address Authentication Functions364
- Related Concepts364
  - MAC Address Authentication Timers364
  - Quiet MAC Address364
- MAC Address Authentication Enhanced Function Configuration365
- Displaying and Maintaining MAC Address Authentication Configuration369
- MAC Address Authentication Configuration Examples369
Arp Configuration371
- ARP Configuration372
- Introduction to ARP372
- Configuring ARP376
- Configuring Gratuitous ARP376
- ARP Configuration Examples377
- Configuring ARP Source MAC Address Consistency Check377
- Displaying and Debugging ARP377
Table of Contents379
- 1 DHCP Overview380
- 2 DHCP Relay Agent Configuration384
- 3 DHCP Snooping Configuration394
- 4 DHCP/BOOTP Client Configuration403
Acl Configuration406
- Acl Configuration407
- ACL Overview407
- ACL Configuration Task List409
- Displaying and Maintaining ACL Configuration417
- Examples for Upper-Layer Software Referencing Acls417
  - Example for Controlling Telnet Login Users by Source IP417
  - Example for Controlling Web Login Users by Source IP418
- Examples for Applying Acls to Hardware418
Mirroring423
- Overview424
- Qos Configuration424
- Introduction to Qos Functions426
- Qos Supported by Switch 4500 Series426
- Qos Configuration436
- Displaying and Maintaining Qos446
- Qos Configuration Examples447
Mirroring Configuration452
- Mirroring Configuration453
- Mirroring Overview453
- Mirroring Configuration455
  - Configuring Local Port Mirroring456
  - Configuring Remote Port Mirroring456
- Displaying and Maintaining Port Mirroring459
- Mirroring Configuration Examples460
  - Local Port Mirroring Configuration Example460
  - Remote Port Mirroring Configuration Example461
Xrn Fabric Configuration464
- Introduction to XRN465
  - Establishment of an XRN Fabric465
  - How XRN Works468
- XRN Fabric Configuration465
- XRN Fabric Configuration468
- Displaying and Maintaining XRN Fabric473
- XRN Fabric Configuration Example473
Cluster476
- Cluster477
- Cluster Overview477
- Cluster Configuration Task List485
- Displaying and Maintaining Cluster Configuration499
- Cluster Configuration Examples500
Poe Profile Configuration506
- Poe Configuration507
- Poe Overview507
  - Introduction to Poe507
  - Poe Features Supported by Switch 4500507
- Poe Configuration Example513
- Introduction to Poe Profile515
  - Configuring Poe Profile515
- Poe Profile Configuration515
- Displaying Poe Profile Configuration517
- Poe Profile Configuration Example517
  - Poe Profile Application Example517
UDP Helper Configuration520
- UDP Helper Configuration521
Snmp Configuration/Rmon Configuration524
- 1 Snmp Configuration525
- 2 RMON Configuration533
Ntp Configuration538
- Introduction to NTP539
- Ntp Configuration539
- Configuring NTP Implementation Modes544
- NTP Configuration Task List544
- Configuring Access Control Right548
  - Configuration Prerequisites548
  - Configuration Procedure548
- Configuring NTP Authentication549
  - Configuration Prerequisites549
  - Configuration Procedure550
- Configuring Optional NTP Parameters551
- Displaying NTP Configuration552
- Configuration Examples553
Ssh Configuration561
- Ssh Configuration562
- SSH Overview562
- SSH Server and Client565
- Configuring the SSH Server566
- Configuring the SSH Client574
- Displaying and Maintaining SSH Configuration582
- Comparison of SSH Commands with the same Functions583
- SSH Configuration Examples584
File System Management Configuration606
- File System Configuration607
- File System Management Configuration607
- File Attribute Configuration611
- Configuration File Backup and Restoration614
  - Introduction to Configuration File Backup and Restoration614
  - File Backup and Restoration614
Ftp and Sftp Configuration/Tftp Configuration615
- 1 FTP and SFTP Configuration616
  - Introduction to FTP and SFTP616
- 2 Tftp Configuration636
  - Introduction to TFTP636
    - TFTP Configuration: a Switch Operating as a TFTP Client637
    - TFTP Configuration Example638
Information Center641
- Information Center642
- Information Center Overview642
  - System Information Format645
- Information Center Configuration647
- Displaying and Maintaining Information Center655
- Information Center Configuration Examples655
Table of Contents660
- 1 Boot ROM and Host Software Loading661
- 2 Basic System Configuration and Debugging676
- 3 Network Connectivity Test679
Vlan-Vpn Configuration/Selective Qinq Configuration687
- 1 VLAN-VPN Configuration688
- 2 Selective Qinq Configuration696
Ipv6 Configuration/Ipv6 Application Configuration708
- 1 Ipv6 Configuration709
- 2 Ipv6 Application Configuration727

3Com 4500 - Troubleshooting Ethernet Port Configuration

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