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Chapter 7 SSID Screen On APs without WMM QoS, all traffic streams are given the same access priority to the wireless network. If the introduction of another traffic stream creates a data transmission demand that exceeds the current network capacity, then the new traffic stream reduces the throughput of the other traffic streams. The NWA uses WMM QoS to prioritize traffic streams according to the IEEE 802.1q or DSCP information in each packet's header. The NWA automatically determines the priority to use for an individual traffic stream. This prevents reductions in data transmission for applications that are sensitive to latency and jitter (variations in delay). 7.3.1.1 WMM QoS Priorities The following table describes the WMM QoS priority levels that the NWA uses. Table 19 WMM QoS Priorities Priority Level description voice (WMM_VOICE) Typically used for traffic that is especially sensitive to jitter. Use this priority to reduce latency for improved voice quality. video (WMM_VIDEO) Typically used for traffic which has some tolerance for jitter but needs to be prioritized over other data traffic. best effort (WMM_BEST_EFFORT) Typically used for traffic from applications or devices that lack QoS capabilities. Use best effort priority for traffic that is less sensitive to latency, but is affected by long delays, such as Internet surfing. background (WMM_BACKGROUND) This is typically used for non-critical traffic such as bulk transfers and print jobs that are allowed but that should not affect other applications and users. Use background priority for applications that do not have strict latency and throughput requirements. 7.3.2 Type Of Service (ToS) Network traffic can be classified by setting the ToS (Type Of Service) values at the data source (for example, at the NWA) so a server can decide the best method of delivery, that is the least cost, fastest route and so on. 7.3.2.1 ToS (Type of Service) and WMM QoS The DSCP value of outgoing packets is between 0 and 255. 0 is the default priority. WMM QoS checks the DSCP value in the header of data packets. It gives the traffic a priority according to this number. In order to control which priority level is given to traffic, the device sending the traffic must set the DSCP value in the header. If the DSCP value is not specified, then the traffic is treated as besteffort. This means the wireless clients and the devices with which they are communicating must both set the DSCP value in order to make the best use of WMM QoS. A Voice over IP (VoIP) device for example may allow you to define the DSCP value. The following table lists which WMM QoS priority level the NWA uses for specific DSCP values. Table 20 ToS and IEEE 802.1d to WMM QoS Priority Level Mapping Dscp Value WMM qos Priority Level 224, 192 voice 160, 128 video NWA1100-N User's Guide 83

Section	Page
NWA1100-N	1
About This User's Guide	3
Document Conventions	5
Safety Warnings	7
Contents Overview	9
Table of Contents	11
User’s Guide	17
Introducing the NWA	19
1.1 Introducing the NWA	19
1.2 Applications for the NWA	19
1.2.1 Access Point	20
1.2.2 Bridge / Repeater	20
1.2.3 AP + Bridge	22
1.2.4 Wireless Client	23
1.2.5 MBSSID	24
1.3 Ways to Manage the NWA	25
1.4 Configuring Your NWA’s Security Features	25
1.4.1 Control Access to Your Device	25
1.4.2 Wireless Security	25
1.5 Good Habits for Managing the NWA	26
1.6 Hardware Connections	26
1.7 LEDs	27
Introducing the Web Configurator	29
2.1 Accessing the Web Configurator	29
2.2 Resetting the NWA	30
2.2.1 Methods of Restoring Factory-Defaults	30
2.3 Navigating the Web Configurator	30
Status Screens	33
3.1 The Status Screen	33
3.1.1 System Statistics Screen	35
Tutorial	37
4.1 How to Configure the Wireless LAN	37
4.1.1 Choosing the Wireless Mode	37
4.1.2 Wireless LAN Configuration Overview	37
4.1.3 Further Reading	38
4.2 How to Configure Multiple Wireless Networks	39
4.2.1 Configure the SSID Profiles	40
4.2.2 Configure the Standard Network	42
4.2.3 Configure the VoIP Network	43
4.2.4 Configure the Guest Network	45
4.2.5 Testing the Wireless Networks	46
4.3 NWA Setup in AP and Wireless Client Modes	47
4.3.1 Scenario	47
4.3.2 Configuring the NWA in Access Point Mode	47
4.3.3 Configuring the NWA in Wireless Client Mode	50
4.3.4 MAC Filter Setup	51
4.3.5 Testing the Connection and Troubleshooting	52
Technical Reference	53
System Screens	55
5.1 Overview	55
5.2 What You Can Do in this Chapter	55
5.3 What You Need To Know	55
5.4 General Screen	57
5.4.1 Password Screen	57
5.5 Time Screen	58
5.6 Technical Reference	59
5.6.1 Pre-defined NTP Time Servers List	59
Wireless Settings Screen	60
6.1 Overview	60
6.2 What You Can Do in this Chapter	60
6.3 What You Need To Know	61
6.4 Wireless Settings Screen	62
6.4.1 Access Point Mode	63
6.4.2 Bridge / Repeater Mode	65
6.4.3 AP + Bridge Mode	69
6.4.4 Wireless Client Mode	70
6.4.5 MBSSID Mode	73
6.5 Technical Reference	75
6.5.1 WMM QoS	75
6.5.2 Spanning Tree Protocol (STP)	76
6.5.3 Additional Wireless Terms	77
SSID Screen	79
7.1 Overview	79
7.1.1 What You Can Do in this Chapter	79
7.1.2 What You Need To Know	79
7.2 The SSID Screen	80
7.2.1 Configuring SSID	81
7.3 Technical Reference	82
7.3.1 WMM QoS	82
7.3.2 Type Of Service (ToS)	83
Wireless Security Screen	85
8.1 Overview	85
8.2 What You Can Do in this Chapter	85
8.3 What You Need To Know	86
8.4 The Security Screen	87
8.4.1 Security: WEP	89
8.4.2 Security: 802.1x Only	90
8.4.3 Security: 802.1x Static 64-bit, 802.1x Static 128-bit, 802.1x Static 152- bit	92
8.4.4 Security: WPA	93
8.4.5 Security: WPA2 or WPA2-MIX	95
8.4.6 Security: WPA-PSK, WPA2-PSK, WPA2-PSK-MIX	97
8.5 Technical Reference	98
RADIUS Screen	99
9.1 Overview	99
9.2 What You Can Do in this Chapter	99
9.3 What You Need to Know	99
9.4 The RADIUS Screen	100
MAC Filter Screen	102
10.1 Overview	102
10.2 What You Can Do in this Chapter	102
10.3 What You Need To Know	102
10.4 MAC Filter Screen	103
IP Screen	105
11.1 Overview	105
11.2 What You Can Do in this Chapter	105
11.3 What You Need to Know	105
11.4 IP Screen	106
11.5 Technical Reference	107
11.5.1 WAN IP Address Assignment	107
11.5.2 Spanning Tree Protocol (STP)	107
Remote Management	109
12.1 Overview	109
12.2 What You Can Do in this Chapter	109
12.3 What You Need To Know	110
12.4 The Telnet Screen	112
12.5 The FTP Screen	112
12.6 The WWW Screen	113
12.7 The SNMP Screen	115
12.8 Technical Reference	116
12.8.1 MIB	116
12.8.2 Supported MIBs	116
12.8.3 SNMP Traps	117
Certificate Screen	119
13.1 Overview	119
13.2 What You Can Do in this Chapter	119
13.3 What You Need To Know	119
13.4 Certificate Screen	120
13.5 Technical Reference	120
13.5.1 Private-Public Certificates	120
13.5.2 Certification Authorities	121
13.5.3 Checking the Fingerprint of a Certificate on Your Computer	121
Log Screens	123
14.1 Overview	123
14.2 What You Can Do in this Chapter	123
14.3 What You Need To Know	124
14.4 View Log Screen	124
14.5 Log Settings Screen	125
Maintenance	129
15.1 Overview	129
15.2 What You Can Do in this Chapter	129
15.3 What You Need To Know	129
15.4 Association List Screen	129
15.5 Channel Usage Screen	130
15.6 F/W Upload Screen	131
15.7 Configuration File Screen	133
15.7.1 Backup Configuration	133
15.7.2 Restore Configuration	133
15.7.3 Back to Factory Defaults	135
15.8 Restart Screen	135
Troubleshooting	137
16.1 Power, Hardware Connections, and LEDs	137
16.2 NWA Access and Login	138
16.3 Internet Access	139
Product Specifications	141
Power over Ethernet (PoE) Specifications	142
Setting Up Your Computer’s IP Address	143
Pop-up Windows, JavaScript and Java Permissions	171
IP Addresses and Subnetting	183
Wireless LANs	191
Text File Based Auto Configuration	205
Open Software Announcements	207
Legal Information	237

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Chapter 7 SSID Screen

NWA1100-N User’s Guide

On APs without WMM QoS, all traffic streams are given the same access priority to the wireless

network. If the introduction of another traffic stream creates a data transmission demand that

exceeds the current network capacity, then the new traffic stream reduces the throughput of the

other traffic streams.

The NWA uses WMM QoS to prioritize traffic streams according to the IEEE 802.1q or DSCP

information in each packet’s header. The NWA automatically determines the priority to use for an

individual traffic stream. This prevents reductions in data transmission for applications that are

sensitive to latency and jitter (variations in delay).

7.3.1.1

WMM QoS Priorities

The following table describes the WMM QoS priority levels that the NWA uses.

7.3.2

Type Of Service (ToS)

Network traffic can be classified by setting the ToS (Type Of Service) values at the data source (for

example, at the NWA) so a server can decide the best method of delivery, that is the least cost,

fastest route and so on.

7.3.2.1

ToS (Type of Service) and WMM QoS

The DSCP value of outgoing packets is between 0 and 255. 0 is the default priority. WMM QoS

checks the DSCP value in the header of data packets. It gives the traffic a priority according to this

number.

In order to control which priority level is given to traffic, the device sending the traffic must set the

DSCP value in the header. If the DSCP value is not specified, then the traffic is treated as best-

effort. This means the wireless clients and the devices with which they are communicating must

both set the DSCP value in order to make the best use of WMM QoS. A Voice over IP (VoIP) device

for example may allow you to define the DSCP value.

The following table lists which WMM QoS priority level the NWA uses for specific DSCP values.

Table 19

WMM QoS Priorities

Priority Level

description

voice

(WMM_VOICE)

Typically used for traffic that is especially sensitive to jitter. Use this

priority to reduce latency for improved voice quality.

video

(WMM_VIDEO)

Typically used for traffic which has some tolerance for jitter but needs to

be prioritized over other data traffic.

best effort

(WMM_BEST_EFFORT)

Typically used for traffic from applications or devices that lack QoS

capabilities. Use best effort priority for traffic that is less sensitive to

latency, but is affected by long delays, such as Internet surfing.

background

(WMM_BACKGROUND)

This is typically used for non-critical traffic such as bulk transfers and

print jobs that are allowed but that should not affect other applications

and users. Use background priority for applications that do not have strict

latency and throughput requirements.

Table 20

ToS and IEEE 802.1d to WMM QoS Priority Level Mapping

Dscp Value

WMM qos Priority Level

224, 192

voice

160, 128

video