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Chapter 12 Troubleshooting
NWA1121-NI User’s Guide
130
5 If the problem continues, contact your ISP.
I cannot access the Internet anymore. I had access to the Internet (with the NWA1121-NI),
but my Internet connection is not available anymore.
1 Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick
Start Guide and Section 1.7 on page 17.
2 Reboot the NWA1121-NI.
3 If the problem continues, contact your ISP or network administrator.
The Internet connection is slow or intermittent.
1 There might be a lot of traffic on the network. Look at the LEDs, and check Section 1.7 on page 17.
If the NWA1121-NI is sending or receiving a lot of information, try closing some programs that use
the Internet, especially peer-to-peer applications.
2 Check the signal strength. If the signal is weak, try moving the NWA1121-NI (in wireless client
mode) closer to the AP (if possible), and look around to see if there are any devices that might be
interfering with the wireless network (microwaves, other wireless networks, and so on).
3 Reboot the NWA1121-NI.
4 If the problem continues, contact the network administrator or vendor, or try one of the advanced
suggestions.
Advanced Suggestions
• Check the settings for QoS. If it is disabled, you might consider activating it.
- NWA1121-NI 1
- IMPORTANT! 2
- READ CAREFULLY BEFORE USE 2
- Related Documentation 2
- Contents Overview 3
- Table of Contents 5
- Chapter 5 6
- Chapter 6 6
- Table of Contents 7
- User’s Guide 9
- CHAPTER 1 11
- 1.2.2 Wireless Client 13
- 1.2.3 Root AP 14
- 1.2.4 Repeater 14
- 1.4.2 Wireless Security 16
- 1.6 Hardware Connections 17
- 1.7 LED 17
- CHAPTER 2 19
- 2.2 Resetting the NWA1121-NI 20
- 2.3.1 Title Bar 22
- 2.3.2 Navigation Panel 23
- 2.3.3 Main Window 24
- CHAPTER 3 25
- Chapter 3 Dashboard 26
- Chapter 3 Dashboard 27
- CHAPTER 4 29
- 4.2.1.1 MBSSID 32
- Chapter 4 Tutorial 35
- 4.3.1 Scenario 38
- 4.3.4 MAC Filter Setup 44
- Chapter 4 Tutorial 46
- Technical Reference 47
- CHAPTER 5 49
- 5.4 Statistics 50
- 5.5 Association List 51
- 5.6 Channel Usage 52
- Chapter 5 Monitor 54
- CHAPTER 6 55
- 6.3 What You Need To Know 56
- Wireless Mode 57
- Wireless Security 57
- Passphrase 59
- 6.4 Wireless Settings Screen 60
- 6.4.1 Root AP Mode 61
- Chapter 6 Wireless LAN 63
- 6.4.2 Repeater Mode 64
- Chapter 6 Wireless LAN 66
- 6.4.3 Wireless Client Mode 67
- 6.4.4 MBSSID Mode 69
- 6.5 SSID Screen 72
- 6.5.1 Configuring SSID 73
- 6.6 Wireless Security Screen 74
- 6.6.1 Security: WEP 76
- 6.6.2 Security: 802.1x Only 77
- 6.6.2.2 Wireless Client 78
- 6.6.3.1 Access Point 80
- 6.6.3.2 Wireless Client 82
- 6.6.4.1 Access Point 84
- 6.6.4.2 Wireless Client 85
- 6.7 RADIUS Screen 87
- 6.8 MAC Filter Screen 89
- 6.9 Technical Reference 91
- 6.9.2 WMM QoS 92
- CHAPTER 7 94
- IPv6 Addressing 95
- Prefix and Prefix Length 95
- Link-local Address 95
- Global Address 95
- 7.4 LAN IP Screen 96
- Chapter 7 LAN 97
- Table 29 LAN IP (continued) 97
- CHAPTER 8 98
- 8.3 VLAN Screen 99
- Chapter 8 VLAN 100
- NWA1121-NI User’s Guide 100
- CHAPTER 9 101
- 9.3 What You Need To Know 102
- SNMP v3 and Security 103
- Remote Management Limitations 103
- 9.4 WWW Screen 104
- 9.5 Certificates Screen 105
- 9.6 Telnet Screen 106
- 9.7 SNMP Screen 107
- Chapter 9 System 109
- LABEL DESCRIPTION 109
- 9.8 FTP Screen 110
- 9.9 Technical Reference 111
- 9.9.2 Supported MIBs 112
- Chapter 9 System 114
- CHAPTER 10 115
- 10.3 What You Need To Know 116
- 10.4 Log Settings Screen 116
- Chapter 10 Log Settings 118
- CHAPTER 11 119
- 11.3 What You Need To Know 120
- 11.4 General Screen 120
- 11.5 Password Screen 121
- 11.6 Time Screen 122
- 11.7 Firmware Upgrade Screen 123
- 11.8.1 Backup Configuration 124
- 11.9 Restart Screen 125
- Chapter 11 Maintenance 126
- CHAPTER 12 127
- I forgot the password 128
- 12.3 Internet Access 129
- APPENDIX A 131
- Verifying Settings 134
- Windows Vista 135
- Windows 7 139
- Mac OS X: 10.3 and 10.4 143
- Mac OS X: 10.5 and 10.6 146
- Linux: Ubuntu 8 (GNOME) 149
- Linux: openSUSE 10.3 (KDE) 153
- APPENDIX B 159
- JavaScript 162
- Java Permissions 164
- JAVA (Sun) 165
- Mozilla Firefox 166
- Allowing Pop-Ups 168
- Enabling Java 168
- APPENDIX C 171
- Subnet Masks 172
- Network Size 173
- Notation 173
- Subnetting 174
- Example: Four Subnets 175
- Example: Eight Subnets 176
- Subnet Planning 177
- Configuring IP Addresses 178
- Private IP Addresses 178
- APPENDIX D 179
- Fragmentation Threshold 182
- Preamble Type 183
- IEEE 802.11g Wireless LAN 183
- Wireless Security Overview 183
- IEEE 802.1x 184
- Types of RADIUS Messages 185
- Types of EAP Authentication 185
- WPA and WPA2 187
- Encryption 187
- User Authentication 188
- Security Parameters Summary 190
- Antenna Overview 190
- Appendix D Wireless LANs 192
- APPENDIX E 193
- Industry Canada Statement 194
- Notices 195
- Viewing Certifications 195
- ZyXEL Limited Warranty 195
- National Restrictions 197
- Safety Warnings 199
- Appendix E Legal Information 200
- NWA1121-NI User’s Guide206 206
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