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125

Chapter 9

Loopback Protection

This chapter explains how to configure the Loopback Protection feature for

specific ports on the AT-GS950/16 switch. If the Tx and Rx pairs on the

same port are connected, then this feature detects this condition and

disables the port for a pre-configured amount of time.

This chapter contains the following topics:

 “Configuration” on page 126

 “Status” on page 128

Note

To permanently save your new settings or any changes to the

configuration file, select Save Settings to Flash from the main

menu on the left side of the page.

Default Chapter3
- Table of Contents3
List of Figures11
List of Tables15
Preface17
- Document Conventions18
- Allied Telesis Contact Information19
- Getting Started21
Chapter 1 : Starting a Web Browser Session23
- Establishing a Remote Connection to the Web Browser Interface24
- Figure 1. Entering a Switch's IP Address in the URL Field24
- Figure 2. Management Login Dialog Box24
- Figure 3. AT-GS950/16 Switch Information Page25
- Figure 4. Front Panel Page26
- Web Browser Tools27
- Quitting a Web Browser Management Session28
Chapter 2 : System Configuration29
- System Management Information30
- Figure 5. AT-GS950/16 Management Page30
- Configuration of Ipv4 Address, Subnet Mask and Gateway Address32
- Figure 6. Ipv4 Setup Page32
- Ipv6 System Configuration34
- Figure 7. Ipv6 System Settings Page34
- Ipv6 Neighbor Configuration36
  - Create an Ipv6 Neighbor List36
  - Figure 8. Ipv6 Neighbor Settings Page36
  - Delete an Ipv6 Neighbor Entry37
  - Find an Ipv6 Neighbor37
  - Figure 9. Ipv6 Neighbor Settings Page with Addresses37
  - Figure 10. Example Search with Neighbor Ipv6 Address38
  - Figure 11. Example Search with Link Layer MAC Address38
  - Figure 12. Example Search with both Addresses39
- IP Access List Configuration40
  - Create an IP Access List40
  - Figure 13. IP Access List Page40
  - Delete an IP Address List Entry41
- User Name and Password Configuration42
  - Add New User Name and Password42
  - Figure 14. Administration Page42
  - Modify User Name and Password43
  - Figure 15. Administration Page Example43
  - Delete User Name and Password44
  - Figure 16. Modify Administration Page44
- User Interface Configuration45
  - SNMP Interface45
  - Figure 17. User Interface Page45
  - User Interface Timeout46
  - Group Interval46
- System Time47
  - Manually Setting System Time47
  - Figure 18. System Time Page47
  - Setting SNTP48
  - Setting Daylight Savings Parameters49
- SSL Settings50
  - Configuring SSL50
  - Figure 19. SSL Settings Page50
- DHCP and ATI Web Discovery Tool52
- DHCP Client Configuration53
  - Activate or Deactivate DCHP for Ipv453
  - Activate or Deactivate DCHP for Ipv654
- DHCP Auto Configuration56
- Figure 20. DHCP Auto Configuration Settings Page56
- System Information Display57
- Figure 21. AT-GS950/16 Switch Information Page57
- System Log Configuration60
- Figure 22. System Log Configuration Page60
- Bridge Configuration63
Chapter 3 : Port Configuration65
- Overview66
- Displaying and Configuring Ports67
- Figure 23. AT-GS950/16 Physical Interface Page67
Chapter 4 : STP and RSTP71
- Overview72
- STP and RSTP Global Settings81
- Figure 28. Spanning Tree Protocol Settings Page81
- STP and RSTP Port Settings84
- Figure 29. Port Settings Page84
Chapter 5 : Multiple Spanning Tree Protocol87
- MSTP Global Settings88
- Figure 30. Spanning Tree Protocol Settings Page88
- Generic MSTP Port Settings91
- Figure 31. Port Settings Page91
- MST Settings94
- MST Port Settings96
- Figure 33. MST Port Settings Page96
- Instance Information98
- Figure 34. Instance Information Page98
Chapter 6 : Static Port Trunking99
- Overview100
- Figure 35. Static Port Trunk Example100
- Create a Port Trunk103
- Figure 36. Trunking Page103
- Modify a Port Trunk105
- Disable a Port Trunk107
Chapter 7 : LACP Port Trunks109
- Overview110
- System Priority111
- Port Priority Value112
- General Guidelines113
- Group Status115
- Port Priority Configuration118
- Figure 40. AT-GS950/16 Port Priority Page118
Chapter 8 : Port Mirroring119
- Overview120
- Port Mirroring Configuration121
- Figure 41. AT-GS950/16 Mirroring Page121
- Disable Port Mirroring123
Chapter 9 : Loopback Protection125
- Configuration126
- Figure 42. AT-GS950/16 Loopback Detection Page126
- Status128
Chapter 10 : MAC Address Table129
- Overview130
- Static Unicast MAC Address Configuration132
- Figure 43. AT-GS950/16 Static Unicast Address Table Page132
- Figure 44. Static Unicast Address Table with Port-Based VLAN Example133
- Modify Static Unicast Address134
- Figure 45. Modify Static Unicast Address Page134
- Delete Static Unicast Address135
- Static Multicast Address Configuration136
- Figure 46. Static Multicast Address Table Page136
- Figure 47. Static Multicast Address Table Example137
- Modify Static Multicast Address139
- Figure 48. Modify Static Multicast Address Page139
- Delete Static Multicast Address140
Chapter 11 : IGMP Snooping141
- Overview142
- IGMP Snooping Configuration144
- Figure 49. IGMP Snooping Settings Page144
- Figure 50. IGMP Snooping Page with MAC Address146
- IGMP Snooping Router Port Modification147
- Figure 51. IGMP Snooping Router Port Page147
- Figure 52. Modify IGS Static Router Port Page147
Chapter 12 : Storm Control149
- Overview150
  - Ingress Rate Limiting151
  - Egress Rate Limiting151
- Configuration152
- Figure 53. AT-GS950/16 Storm Control Page152
- Ingress Rate Limiting154
- Figure 54. AT-GS950/16 Ingress Rate Limiting Page154
- Egress Rate Limiting156
- Figure 55. AT-GS950/16 Egress Rate Limiting Page156
Chapter 13 : Virtual Lans157
- VLAN Overview158
- Assign Ports to a VLAN Mode164
- Figure 56. AT-GS950/16 VLAN Mode Page164
- Tagged VLAN Configuration166
- Tagged VLAN Port Settings171
- Figure 60. AT-GS950/16 VLAN Port Settings Page171
- Port-Based VLAN Configuration173
- Select MAC Address Forwarding Table Mode176
- Figure 64. Forwarding Table Mode Page176
- View Dynamic Forwarding Table177
- Figure 65. Dynamic Forwarding Table Page177
- Private VLAN Configuration179
- View Current VLAN Database182
- Figure 67. VLAN Current Database Page182
Chapter 14 : GVRP185
- Overview and Guidelines186
- General Configuration187
- Figure 68. GVRP Global Settings Page187
- Port Settings188
- Figure 69. GVRP Port Settings Page188
- Time Settings190
- Figure 70. AT-GS950/16 GVRP Time Settings Page190
Chapter 15 : Quality of Service and Class of Service193
- Overview194
- Mapping Cos Priorities to Egress Queues198
- Figure 71. Cos Page198
- Associate Ports to Cos Priorities200
- Figure 72. AT-GS950/16 Port Priority Page200
- Associate DSCP Classes to Egress Queues201
- Figure 73. DSCP Class Mapping Page201
- Queue Scheduling Algorithm203
- Figure 74. Scheduling Algorithm Page203
- Ipv6 Traffic Class Mapping204
- Advanced Features207
Chapter 16 : Snmpv1 and V2C209
- Snmpv1 and Snmpv2C Overview210
- Trap Receiver Attributes211
- Activate SNMP Interface212
- Snmpv1 and Snmpv2C User and Group Names213
- SNMP Community Strings216
- SNMP Traps219
Chapter 17 : Snmpv3223
- Overview224
- Snmpv3 User and Group Names228
- Snmpv3 View Names231
- Snmpv3 View Table234
- Snmpv3 Traps237
- SNMP Engine ID238
Chapter 18 : Access Control Configuration241
- Overview242
- Policy Settings243
- Rate Control Settings251
- Policy Database254
Chapter 19 : RMON257
- Overview258
- Enable and Disable RMON259
- Figure 101. RMON Basic Settings Page259
- Port Statistics260
- Figure 102. Ethernet Statistics Settings Page260
- Figure 103. Ethernet Statistics Configuration Example261
- Histories262
- Figure 104. History Control Settings Page262
- Figure 105. History Control Configuration Example263
- Events264
- Figure 106. RMON Event Settings Page264
- Figure 107. RMON Event Configuration Example265
- Alarms266
- Figure 108. RMON Alarm Settings Page267
- Figure 109. RMON Alarm Configuration Example268
Chapter 20 : Voice VLAN269
- Overview270
- General Guidelines273
- Configuration274
- Figure 110. AT-GS950/16 Voice VLAN Settings Page274
- OUI Setting277
Chapter 21 : Security279
- Port Access Control280
- RADIUS Client286
- Tacacs289
- Dial-In User- Local Authentication292
- Destination MAC Filter295
Chapter 22 : DHCP Snooping299
- Overview300
- General Guidelines302
- General Configuration303
- VLAN Setting306
- Trusted and Untrusted Port Configuration308
- Figure 123. AT-GS950/16 Trusted Interfaces Page308
- Figure 124. Trusted Interfaces Page Example309
- Binding Database310
Chapter 23 : LLDP313
- Overview314
- Global Configuration315
- Neighbors Information318
- Figure 128. LLDP Neighbors Information Page318
Chapter 24 : Network Statistics319
- Overview320
- Traffic Comparison Statistics321
- Figure 129. Traffic Comparison Chart Page321
- Table 5 Traffic Comparison Options322
- Figure 130. Traffic Comparison Page Example324
- Error Group Statistics325
- Figure 131. Error Group Chart Page325
- Historical Status Statistics327
- Figure 132. Historical Status Chart Page327
- Table 6 Historical Status Options328
- Figure 133. Historical Statistics Page Example330
- Tools331
Chapter 25 : Software/Configuration Updates333
- Chapter 25, "Software/Configuration Updates333
- Overview334
- Upgrade Firmware Image Via HTTP335
- Figure 134. Firmware Upgrade Via HTTP Page336
- Upgrade Firmware Image Via TFTP337
- Figure 135. Firmware Upgrade Via TFTP Page338
- Download or Upload a Configuration File Via HTTP339
- Download or Upload a Configuration File Via TFTP343
Chapter 26 : Cable Diagnostics345
- Chapter 26, "Cable Diagnostics345
- Figure 142. Cable Diagnostics Page345
Chapter 27 : LED ECO Mode347
- Chapter 27, "LED ECO Mode347
- Enable LED ECO Mode348
- Figure 143. LED ECO Mode Page348
- Figure 144. LED ECO Mode Enabled348
- Disable LED ECO Mode349
- Figure 145. LED ECO Mode in Enabled State349
- Figure 146. LED ECO Mode Disabled349
Chapter 28 : Energy-Efficient Ethernet351
- Chapter 28, "Energy-Efficient Ethernet351
- Enable EEE352
- Figure 147. IEEE 802.3Az EEE Page352
- Disable EEE353
Chapter 29 : Rebooting the AT-GS950/16355
- Chapter 29, "Rebooting the AT-GS950/16355
- Figure 148. Factory Default Reset/Reboot Page356
- Switch Reboot356
- Configure Factory Default Values358
- Password Protection of Factory Reset360
Chapter 30 : Pinging a Remote System365
- Chapter 30, "Pinging a Remote System365
- Figure 152. Ping Test Settings Page365
- Figure 153. Ping Test Results Page366
Appendix A: MSTP Overview367
- Overview368
- Multiple Spanning Tree Instance (MSTI)370
- General Guidelines373
- VLAN and MSTI Associations374
- Ports in Multiple Mstis375
- Multiple Spanning Tree Regions376
- Associating Vlans to Mstis381
- Figure 157. CIST and VLAN Guideline - Example 1381
- Figure 158. CIST and VLAN Guideline - Example 2382
- Vlans Across Different Regions383
- Figure 159. Spanning Regions - Example 1383
- Figure 160. Spanning Regions Without Blocking384
- Summary of Guidelines385
Appendix B: AT-GS950/16 Default Parameters387
- Table 9. AT-S114 Management Software Default Settings387

Brand	Allied Telesis
Model	AT-GS950/16
Category	Network Router
Language	English

Allied Telesis AT-GS950/16 User Manual

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