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Technical Reference, 6.9.1 Additional Wireless Terms

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Chapter 6 Wireless LAN The following table describes the labels in this screen. Table 25 Wireless LAN > MAC Filter LABEL DESCRIPTION Profile Name This is the name that identifying this profile. Access Control Mode Select Disabled if you do not want to use this feature. Select Allow to permit access to the NWA1121-NI. MAC addresses not listed will be denied access to the NWA1121-NI. # MAC Address Back Apply Cancel Select Deny to block access to theNWA1121-NI. MAC addresses not listed will be allowed to access the NWA1121-NI. This is the index number of the MAC address listed. Enter the MAC addresses (in XX:XX:XX:XX:XX:XX format) of the wireless station to be allowed or denied access to the NWA1121-NI. Click Back to return to the previous screen. Click Apply to save your changes. Click Cancel to begin configuring this screen afresh. 6.9 Technical Reference This section provides technical background information about the topics covered in this chapter. Refer to Appendix D on page 179 for further readings on Wireless LAN. 6.9.1 Additional Wireless Terms Table 26 Additional Wireless Terms TERM Intra-BSS Traffic RTS/CTS Threshold Preamble Fragmentation Threshold DESCRIPTION This describes direct communication (not through the NWA1121-NI) between two wireless devices within a wireless network. You might disable this kind of communication to enhance security within your wireless network. In a wireless network which covers a large area, wireless devices are sometimes not aware of each other's presence. This may cause them to send information to the AP at the same time and result in information colliding and not getting through. By setting this value lower than the default value, the wireless devices must sometimes get permission to send information to the NWA1121-NI. The lower the value, the more often the devices must get permission. If this value is greater than the fragmentation threshold value (see below), then wireless devices never have to get permission to send information to the NWA1121NI. A preamble affects the timing in your wireless network. There are two preamble modes: long and short. If a device uses a different preamble mode than the NWA1121-NI does, it cannot communicate with the NWA1121-NI. A small fragmentation threshold is recommended for busy networks, while a larger threshold provides faster performance if the network is not very busy. NWA1121-NI User's Guide 91

Section	Page
NWA1121-NI	1
Contents Overview	3
Table of Contents	5
User’s Guide	9
Introducing the NWA1121-NI	11
1.1 Introducing the NWA1121-NI	11
1.2 Wireless Modes	11
1.2.1 MBSSID	11
1.2.2 Wireless Client	13
1.2.3 Root AP	14
1.2.4 Repeater	14
1.3 Ways to Manage the NWA1121-NI	15
1.4 Configuring Your NWA1121-NI’s Security Features	16
1.4.1 Control Access to Your Device	16
1.4.2 Wireless Security	16
1.5 Good Habits for Managing the NWA1121-NI	16
1.6 Hardware Connections	17
1.7 LED	17
Introducing the Web Configurator	19
2.1 Accessing the Web Configurator	19
2.2 Resetting the NWA1121-NI	20
2.2.1 Methods of Restoring Factory-Defaults	21
2.3 Navigating the Web Configurator	22
2.3.1 Title Bar	22
2.3.2 Navigation Panel	23
2.3.3 Main Window	24
Dashboard	25
3.1 The Dashboard Screen	25
Tutorial	29
4.1 How to Configure the Wireless LAN	29
4.1.1 Choosing the Wireless Mode	29
4.1.2 Further Reading	29
4.2 How to Configure Multiple Wireless Networks	29
4.2.1 Configure the SSID Profiles	31
4.2.2 Configure the Standard Network	33
4.2.3 Configure the VoIP Network	34
4.2.4 Configure the Guest Network	36
4.2.5 Testing the Wireless Networks	38
4.3 NWA1121-NI Setup in AP and Wireless Client Modes	38
4.3.1 Scenario	38
4.3.2 Configuring the NWA1121-NI in MBSSID or Root AP Mode	39
4.3.3 Configuring the NWA1121-NI in Wireless Client Mode	42
4.3.4 MAC Filter Setup	44
4.3.5 Testing the Connection and Troubleshooting	45
Technical Reference	47
Monitor	49
5.1 Overview	49
5.2 What You Can Do	49
5.3 View Logs	49
5.4 Statistics	50
5.5 Association List	51
5.6 Channel Usage	52
Wireless LAN	55
6.1 Overview	55
6.2 What You Can Do in this Chapter	55
6.3 What You Need To Know	56
6.4 Wireless Settings Screen	60
6.4.1 Root AP Mode	61
6.4.2 Repeater Mode	64
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
6.6.3 Security: 802.1x Static WEP	79
6.6.4 Security: WPA, WPA2, WPA2-MIX	83
6.6.5 Security: WPA-PSK, WPA2-PSK, WPA2-PSK-MIX	86
6.7 RADIUS Screen	87
6.8 MAC Filter Screen	89
6.9 Technical Reference	91
6.9.1 Additional Wireless Terms	91
6.9.2 WMM QoS	92
6.9.3 Security Mode Guideline	93
LAN	94
7.1 Overview	94
7.2 What You Can Do in this Chapter	94
7.3 What You Need to Know	94
7.4 LAN IP Screen	96
VLAN	98
8.1 Overview	98
8.1.1 What You Can Do in This Chapter	98
8.2 What You Need to Know	98
8.3 VLAN Screen	99
System	101
9.1 Overview	101
9.2 What You Can Do in this Chapter	101
9.3 What You Need To Know	102
9.4 WWW Screen	104
9.5 Certificates Screen	105
9.6 Telnet Screen	106
9.7 SNMP Screen	107
9.8 FTP Screen	110
9.9 Technical Reference	111
9.9.1 MIB	111
9.9.2 Supported MIBs	112
9.9.3 Private-Public Certificates	112
9.9.4 Certification Authorities	112
9.9.5 Checking the Fingerprint of a Certificate on Your Computer	112
Log Settings	115
10.1 Overview	115
10.2 What You Can Do in this Chapter	115
10.3 What You Need To Know	116
10.4 Log Settings Screen	116
Maintenance	119
11.1 Overview	119
11.2 What You Can Do in this Chapter	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 Configuration File Screen	124
11.8.1 Backup Configuration	124
11.8.2 Restore Configuration	124
11.8.3 Back to Factory Defaults	125
11.9 Restart Screen	125
Troubleshooting	127
12.1 Power, Hardware Connections, and LEDs	127
12.2 NWA1121-NI Access and Login	128
12.3 Internet Access	129
Setting Up Your Computer’s IP Address	131
Pop-up Windows, JavaScript and Java Permissions	159
IP Addresses and Subnetting	171
Wireless LANs	179
Legal Information	193

Match case Limit results 1 per page

Chapter 6 Wireless LAN

NWA1121-NI User’s Guide

The following table describes the labels in this screen.

6.9

Technical Reference

This section provides technical background information about the topics covered in this chapter.

Refer to

Appendix D on page 179

for further readings on Wireless LAN.

6.9.1

Additional Wireless Terms

Table 26

Additional Wireless Terms

Table 25

Wireless LAN > MAC Filter

LABEL

DESCRIPTION

Profile Name

This is the name that identifying this profile.

Access Control Mode

Select

Disabled

if you do not want to use this feature.

Select

Allow

to permit access to the NWA1121-NI. MAC addresses not listed will be

denied access to the NWA1121-NI.

Select

Deny

to block access to theNWA1121-NI. MAC addresses not listed will be

allowed to access the NWA1121-NI.

This is the index number of the MAC address listed.

MAC Address

Enter the MAC addresses (in XX:XX:XX:XX:XX:XX format) of the wireless station to be

allowed or denied access to the NWA1121-NI.

Back

Click

Back

to return to the previous screen.

Apply

Click

Apply

to save your changes.

Cancel

Click

Cancel

to begin configuring this screen afresh.

TERM

DESCRIPTION

Intra-BSS Traffic

This describes direct communication (not through the NWA1121-NI) between two

wireless devices within a wireless network. You might disable this kind of

communication to enhance security within your wireless network.

RTS/CTS Threshold

In a wireless network which covers a large area, wireless devices are sometimes not

aware of each other’s presence.

This may cause them to send information to the AP

at the same time and result in information colliding and not getting through.

By setting this value lower than the default value, the wireless devices must

sometimes get permission to send information to the NWA1121-NI. The lower the

value, the more often the devices must get permission.

If this value is greater than the fragmentation threshold value (see below), then

wireless devices never have to get permission to send information to the NWA1121-

NI.

Preamble

A preamble affects the timing in your wireless network. There are two preamble

modes: long and short. If a device uses a different preamble mode than the

NWA1121-NI does, it cannot communicate with the NWA1121-NI.

Fragmentation

Threshold

A small fragmentation threshold is recommended for busy networks, while a larger

threshold provides faster performance if the network is not very busy.