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G-3000H User’s Guide
Appendix F IP Address Assignment Conflicts 251
Appendix F
IP Address Assignment Conflicts
This appendix describes situations where IP address conflicts may occur. Subscribers with
duplicate IP addresses will not be able to access the Internet.
Case A: The ZyAIR is using the same LAN and WAN IP
addresses
The following figure shows an example where the ZyAIR is using a WAN IP address that is
the same as the IP address of a computer on the LAN.
Figure 171 IP Address Conflicts: Case A
You must set the ZyAIR to use different LAN and WAN IP addresses on different subnets if
you enable DHCP server on the ZyAIR. For example, you set the WAN IP address to
192.59.1.1 and the LAN IP address to 10.59.1.1. Otherwise, It is recommended the ZyAIR use
a public WAN IP address.
Case B: The ZyAIR LAN IP address conflicts with the DHCP
client IP address
In the following figure, the ZyAIR is acting as a DHCP server. The ZyAIR assigns an IP
address, which is the same as its LAN port IP address, to a DHCP client attached to the LAN.
- User’s Guide 1
- Copyright 2
- Federal Communications 3
- Commission (FCC) Interference 3
- Statement 3
- Certifications 4
- ZyXEL Limited Warranty 5
- Customer Support 6
- Customer Support 7 7
- 8 Customer Support 8
- Table of Contents 9
- Chapter 8 11
- Chapter 7 11
- 16 Table of Contents 16
- List of Figures 17
- 22 List of Figures 22
- List of Tables 23
- 26 List of Tables 26
- About This User's Guide 27
- Related Documentation 27
- User Guide Feedback 28
- Syntax Conventions 28
- Graphics Icons Key 29
- 30 Preface 30
- CHAPTER 1 31
- 1.2.2 Firmware Features 32
- WDS Functionality 33
- 802.11b Wireless LAN Standard 33
- 802.11g Wireless LAN Standard 34
- Certificates 34
- Full Network Management 36
- Logging and Tracing 36
- Embedded FTP and TFTP Servers 36
- Wireless Association List 36
- Wireless LAN Channel Usage 36
- 1.3.1 Access Point 37
- 1.3.2 Multiple ESS 37
- 1.3.3 AP + Bridge 38
- 1.3.4 Bridge / Repeater 39
- Figure 6 Bridge Application 40
- CHAPTER 2 41
- 2.2 Resetting the ZyAIR 43
- CHAPTER 3 45
- 46 Chapter 3 Wizard Setup 46
- Chapter 3 Wizard Setup 47 47
- 3.4 Wizard Setup: IP Address 48
- Chapter 3 Wizard Setup 49 49
- 3.5 Basic Setup Complete 50
- CHAPTER 4 51
- 4.3 Configuring Password 52
- Chapter 4 System Screens 53 53
- Figure 16 Password 53
- Table 8 Password 53
- 54 Chapter 4 System Screens 54
- Figure 17 Time Setting 54
- Table 9 Time Setting 54
- Chapter 4 System Screens 55 55
- 56 Chapter 4 System Screens 56
- CHAPTER 5 57
- 5.1.2 ESS 58
- 5.2 Wireless LAN Basics 59
- 5.3 WMM QoS 60
- 5.3.2.1 DiffServ 61
- 5.4.1 Rapid STP 62
- 5.4.2 STP Terminology 62
- 5.5 Wireless Screen Overview 63
- 5.6 Configuring Wireless 64
- 5.6.2 Bridge/Repeater Mode 66
- Figure 22 Bridging Example 67
- 5.6.3 AP+Bridge Mode 70
- 5.6.4 Multiple ESS Mode 71
- CHAPTER 6 73
- 6.3 802.1x Overview 74
- 6.5 Dynamic WEP Key Exchange 75
- 6.6 Introduction to WPA 75
- 6.6.1 User Authentication 76
- 6.6.2 Encryption 76
- 6.8 Security Modes 78
- Table 16 Security Modes 79
- 6.12 Configuring Security 80
- 6.12.1 Security: No Access 81
- 6.12.2 Security: WEP 82
- Table 21 Security: WEP 83
- 6.13 Introduction to RADIUS 89
- 6.14 Configuring RADIUS 89
- Figure 37 RADIUS 90
- Table 26 RADIUS 90
- CHAPTER 7 93
- 7.1.3 Multiple ESS Example 94
- 7.2 SSID 97
- 7.2.1 Configuring SSID 98
- Figure 42 Configuring SSID 99
- Table 30 Configuring SSID 99
- 7.2.2 Second Rx VLAN ID 100
- G-3000H User’s Guide 101
- CHAPTER 8 103
- 00:0a:c5:00:00:66 106
- 00:0a:c5:00:00:cc 106
- 8.3 Configuring MAC Filter 108
- 8.4 Configuring Roaming 109
- Figure 52 Roaming Example 110
- Figure 53 Roaming 111
- Table 33 Roaming 111
- CHAPTER 9 113
- SSID screen 114
- Chapter 9 VLAN 115 115
- Table 34 VLAN 115
- 116 Chapter 9 VLAN 116
- Figure 57 VLAN-Aware Switch 116
- Chapter 9 VLAN 117 117
- Figure 59 VLAN Setup 117
- 118 Chapter 9 VLAN 118
- Chapter 9 VLAN 119 119
- 120 Chapter 9 VLAN 120
- Chapter 9 VLAN 121 121
- 122 Chapter 9 VLAN 122
- Chapter 9 VLAN 123 123
- 124 Chapter 9 VLAN 124
- Chapter 9 VLAN 125 125
- 126 Chapter 9 VLAN 126
- CHAPTER 10 127
- 10.3 Configuring IP 128
- CHAPTER 11 129
- 11.3 Configuration Summary 130
- 11.4 My Certificates 130
- Chapter 11 Certificates 131 131
- Figure 75 My Certificates 131
- Table 38 My Certificates 131
- 132 Chapter 11 Certificates 132
- 11.6 Importing a Certificate 133
- 11.7 Creating a Certificate 134
- Chapter 11 Certificates 135 135
- 11.8 My Certificate Details 136
- Chapter 11 Certificates 137 137
- 138 Chapter 11 Certificates 138
- 11.9 Trusted CAs 139
- 140 Chapter 11 Certificates 140
- Figure 79 Trusted CAs 140
- Table 42 Trusted CAs 140
- Chapter 11 Certificates 141 141
- Figure 80 Trusted CA Import 141
- Table 43 Trusted CA Import 141
- 142 Chapter 11 Certificates 142
- Chapter 11 Certificates 143 143
- Table 44 Trusted CA Details 143
- 144 Chapter 11 Certificates 144
- Chapter 11 Certificates 145 145
- 146 Chapter 11 Certificates 146
- CHAPTER 12 147
- 12.2 Configuring WWW 148
- 12.3 Configuring Telnet 150
- 12.4 Configuring TELNET 150
- 12.5 Configuring FTP 151
- 12.6 SNMP 152
- 12.6.1 Supported MIBs 154
- 12.6.2 SNMP Traps 154
- 12.7 SNMP Traps 155
- CHAPTER 13 157
- 158 Chapter 13 Log Screens 158
- Table 51 View Log 158
- Chapter 13 Log Screens 159 159
- Figure 89 Log Settings 159
- Table 52 Log Settings 159
- 160 Chapter 13 Log Screens 160
- CHAPTER 14 161
- 14.2.1 System Statistics 162
- 14.3 Association List 163
- 14.4 Channel Usage 164
- Chapter 14 Maintenance 165 165
- Figure 93 Channel Usage 165
- Table 56 Channel Usage 165
- 14.5 F/W Upload Screen 166
- Chapter 14 Maintenance 167 167
- 14.6 Configuration Screen 168
- Chapter 14 Maintenance 169 169
- 14.7 Restart Screen 170
- CHAPTER 15 171
- Table 60 Main Menu Commands 173
- Table 61 Main Menu Summary 175
- CHAPTER 16 177
- 178 Chapter 16 General Setup 178
- ESC] at any time to cancel 178
- CHAPTER 17 179
- 17.3 Wireless LAN Setup 180
- Chapter 17 LAN Setup 181 181
- 182 Chapter 17 LAN Setup 182
- Chapter 17 LAN Setup 183 183
- 17.3.2 Configuring Roaming 184
- Chapter 17 LAN Setup 185 185
- 186 Chapter 17 LAN Setup 186
- Chapter 17 LAN Setup 187 187
- + Bridge and press [ENTER] 188
- Chapter 17 LAN Setup 189 189
- 190 Chapter 17 LAN Setup 190
- Chapter 17 LAN Setup 191 191
- 192 Chapter 17 LAN Setup 192
- CHAPTER 18 193
- CHAPTER 19 195
- 196 Chapter 19 VLAN Setup 196
- Table 71 Menu 16 VLAN Setup 196
- CHAPTER 20 197
- CHAPTER 21 199
- CHAPTER 22 201
- 22.2 System Information 203
- 22.3 Log and Trace 204
- 22.4 Diagnostic 205
- Diagnostic 206
- CHAPTER 23 207
- 23.2 Backup Configuration 208
- 23.2.4 Example: TFTP Command 211
- 23.3 Restore Configuration 212
- 23.3.1 Restore Using FTP 213
- 23.4.1 Firmware Upload 214
- 23.4.4 TFTP File Upload 215
- 23.4.5 Example: TFTP Command 216
- CHAPTER 24 219
- 24.1.1 CNM 220
- Figure 153 CNM CL 221
- Table 79 CNM Commands 221
- 24.1.3 Configuration Example 223
- 24.2 Time and Date Setting 224
- 24.3 Remote Management Setup 226
- 24.3.3 Web 227
- 24.5 System Timeout 229
- Appendix A 231
- Troubleshooting 231
- Problems with the Password 232
- Problems with Telnet 232
- Appendix B 233
- Specifications 233
- 234 Appendix B Specifications 234
- Appendix C 235
- Power over Ethernet (PoE) 235
- Specifications 235
- Appendix D 237
- Brute-Force Password Guessing 237
- Protection 237
- Appendix E 239
- Installing Components 240
- Configuring 241
- Windows 2000/NT/XP 242
- Macintosh OS 8/9 246
- Macintosh OS X 248
- Verifying Settings 249
- Appendix F 251
- IP addresses dynamically 253
- Appendix G 255
- Wireless LANs 255
- 256 Appendix G Wireless LANs 256
- Appendix G Wireless LANs 257 257
- Fragmentation Threshold 258
- Preamble Type 259
- IEEE 802.1x 260
- Types of Authentication 261
- PEAP (Protected EAP) 262
- Dynamic WEP Key Exchange 262
- Encryption 263
- Security Parameters Summary 264
- Appendix G Wireless LANs 265 265
- 266 Appendix G Wireless LANs 266
- Appendix H 267
- IP Subnetting 267
- Subnet Masks 268
- Subnetting 268
- Example: Two Subnets 269
- 270 Appendix H IP Subnetting 270
- Table 101 Subnet 1 270
- Table 102 Subnet 2 270
- Example: Four Subnets 271
- Example Eight Subnets 272
- Appendix H IP Subnetting 273 273
- 274 Appendix H IP Subnetting 274
- Appendix I 275
- Command Interpreter 275
- Appendix J 277
- Log Descriptions 277
- Log Commands 278
- Log Command Example 279
- Appendix K 281
- Positioning Antennas 282
- Appendix L 283
- Power Adaptor Specifications 283
- Index 285 285
- 286 Index 286
- Index 287 287
- 288 Index 288
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