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Advanced Wireless Configuration for Access Point Groups, Table 17., Wireless Settings Continued

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ProSafe 20-AP Wireless Controller WC7520 Reference Manual Table 17. Wireless Settings (Continued) Field Description Channel Width (11n only) Select the available channel width of the access point. A wider channel improves the performance, but some legacy devices can operate only on either 20 MHz or 40 MHz. Guard Interval (11n only) Select the value that will protect transmissions from interference. A shorter guard interval improves performance, but some legacy devices can operate only with a long guard interval. RTS Threshold (0-2347) The transmission mechanism (CSMA/CA or CSMA/CD) for the packets. If the packet size is equal to or less than this threshold, then the data frame is transmitted immediately. However, if the packet size is larger than the specified value, then the transmitting station must send out an Request to Send Threshold (RTS) packet to the receiving station, and then must wait for the receiving station to send back a Clear to Send (CTS) packet before sending the actual packet data. Fragmentation Length (256-2346) The maximum packet size that used for fragmentation of data packets. Packets larger than the specified fragmentation length are broken up into smaller packets before being transmitted. The fragmentation length must be an even number. Beacon Interval (100-1000) The time interval for each beacon transmission that allows the access point to synchronize the wireless network. Aggregation Length (1024-65535, 11n only) The length that defines the maximum length of Aggregated MAC Protocol Data Unit (AMPDU) packets. Larger aggregation lengths might sometimes lead to better network performance. Aggregation is a mechanism used to achieve higher throughput. AMPDU (11n only) Allow the aggregation of several MAC frames into a single large frame to achieve higher throughput. Enabling AMPDU can sometimes lead to better network performance. RIFS Transmission (11n only) Enable the Reduced Interframe Space (RIFS) option to allow transmission of successive frames at different transmit powers. Enabling RIFS can lead to better network performance. DTIM Interval (1-255) Enter the DTIM or the data beacon rate that you want to use. This sets the message period of the beacon delivery traffic indication in multiples of beacon intervals. Preamble Type (11b/bg only) A long transmit preamble can provide a more reliable connection or a slightly longer range. A short transmit preamble gives better performance. The Auto setting automatically handles both long and short preambles. The default is Auto. Advanced Wireless Configuration for Access Point Groups NETGEAR recommends using the default settings as they are to configure your access points unless you have specific reasons to change them. You can configure wireless settings for access points (see Configuring Wireless Settings on page 70) or for access point groups. Chapter 7: Configuring Wireless Settings | 72

Section	Page
ProSafe 20-AP Wireless Controller WC7520	1
Table of Contents	3
1. Introduction and Overview	7
Key Features and Capabilities	7
Package Contents	9
Hardware Features	10
Front Panel Ports and LEDs	10
Rear Panel Features	11
Bottom Panel With Product Label	12
WC7520 Wireless Controller System Components	12
NETGEAR ProSafe Access Points: WNAP210 and WNDAP350	13
What Can You Do With the WC7520 Wireless Controller?	13
Licenses	15
Maintenance and Support	16
Understanding the Web Management Interface Menu Layout	16
Initial Connection and Configuration	17
Understanding Basic and Advanced Settings	19
Choosing a Location for the Wireless Controller	21
Deploying the Wireless Controller	21
2. System Planning and Deployment Scenarios	22
System Planning	22
Pre-Installation Planning	22
Before You Configure a Wireless Controller	23
Single Controller Configuration with Basic Profile Group	25
Single Controller Configuration with Access Point Groups	26
Stacked Controller Configuration	27
Management VLAN and Data VLAN Strategies	27
Deployment Scenarios	29
Scenario Example 1: Basic Network with Single VLAN	29
Scenario Example 2: Advanced Network with VLANs and SSIDs	31
Scenario Example 3: Advanced Network With Redundancy	33
3. RF Planning	36
RF Planning Overview	36
Planning Requirements	37
Defining and Editing Buildings and Floors	38
Specifying Access Point Requirements	40
Viewing and Managing Heat Maps for Deployed Plans	42
4. Access Point Discovery and Management	46
Access Point Discovery	46
Requirements for Auto Discovery	46
Using the Discovery Wizard	47
Understanding the Discovery Results	49
Managing the Access Point List	50
Adding Access Points to the Managed List After Discovery	50
Editing Access Point Information	51
5. Configuring Network Settings	54
Configuring General Settings	54
Time Management	56
Configuring IP and VLAN Settings	57
Management VLANs	58
Untagged VLANs	58
Managing the DHCP Server	59
Managing Certificates	60
Configuring Syslog and Alarm Notification Settings	61
Configuring Syslog Settings	61
Configuring Alarm Notification Settings	62
Configuring the Email Notification Server	63
6. Managing Access Point Groups	65
Configuring Access Point Groups	65
Managing Access Point Groups in the WLAN	66
7. Configuring Wireless Settings	68
Configuring the Radio	69
Basic Radio Configuration	69
Advanced Radio Configuration for Access Point Groups	69
Configuring Wireless Settings	70
Basic Wireless Configuration	71
Advanced Wireless Configuration for Access Point Groups	72
Configuring Channels	73
Specifying RF Management	75
Basic RF Management	76
Advanced RF Management for Access Point Groups	77
Configuring QoS for Access Point Groups	78
Configuring Load Balancing	79
Configuring Rate Limiting	81
Basic Rate Limiting	81
Advanced Rate Limiting for Access Point Groups	82
8. Configuring Security and Wireless Security Profiles	83
Managing Wireless Security Profiles	83
Small-Scale WLAN Networks	84
Larger Deployments	84
Configuring Basic Security Profiles	85
Configuring Advanced Security Profiles for Access Point Groups	87
Managing Rogue Access Points	89
Configuring Basic Rogue Detection Settings	89
Configuring Advanced Rogue Detection Settings	90
Managing MAC Authentication and MAC Authentication Groups	92
Configuring Basic MAC Authentication Settings	93
Configuring MAC Authentication Settings for Groups	94
Managing Authentication Servers and Authentication Server Groups	95
Configuring Basic Authentication Server Settings	96
Configuring Advanced Authentication Server Settings for Groups	97
Managing Guest Network Access	98
Configuring Captive Portal Settings	98
Managing Users and Passwords	100
9. Maintaining the Controller	101
Managing the Configuration File	101
Backing Up and Restoring the Configuration File	102
Upgrading the Configuration File	103
Rebooting or Resetting the Wireless Controller	105
Rebooting Access Points	107
Managing External Storage	107
Managing Remote Access	108
Specifying Session Timeouts	110
Viewing Alerts and Events and Saving Logs	110
Saving Logs	111
Viewing Alerts and Events	111
Managing Licenses	115
Viewing Your Licenses	116
Configuring the License Server Settings	117
Registering Your Licenses	118
10. Managing Stacking and Redundancy	119
Managing Stacking	119
Configuring Stacking	120
Controller Selection Menu	121
Managing Redundancy	121
Configuring Redundancy	122
11. Monitoring the Wireless Network and Components	124
Monitoring the Network	124
Viewing the Network Summary Screen	125
Viewing Network Usage	126
Viewing Wireless Controllers in the Network	127
Viewing Managed Access Points in the Network	127
Viewing Clients in the Network	131
Viewing Security Profiles in the Network	133
Monitoring the Wireless Controller	134
Viewing the Wireless Controller Summary Screens	135
Viewing Wireless Controller Usage	136
Viewing Access Points Managed by the Wireless Controller	137
Viewing Clients Managed by the Wireless Controller	137
Viewing Rogue Access Points Managed by the Wireless Controller	138
Viewing Security Profiles Managed by the Wireless Controller	139
Viewing DHCP Leases Provided by the Wireless Controller	140
Viewing Captive Portal Users Managed by the Wireless Controller	141
Monitoring the SSIDs	141
Monitoring the Clients	142
Viewing Local Clients	142
Viewing Blacklisted Clients	143
12. Troubleshooting	144
Troubleshooting Basic Functioning	144
Power LED Not On	144
Test LED Never Turns Off	145
LAN Port LEDs Not On	145
Troubleshooting the Web Management Interface	145
Ethernet Cabling	145
IP Address Configuration	145
Internet Browser	146
When You Enter a URL or IP Address a Time-out Error Occurs	147
Troubleshooting a TCP/IP Network Using the Ping Utility	147
Testing the LAN Path to Your Wireless Controller	147
Using the Reset Button to Restore Factory Default Settings	148
Problems with Date and Time	148
Problems With Access Points	149
Using the Diagnostic Tools on the Wireless Controller	149
A. Factory Default Settings and Technical Specifications	152
B. Notification of Compliance	154

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Chapter 7:

Configuring Wireless Settings

ProSafe 20-AP Wireless Controller WC7520 Reference Manual

Advanced Wireless Configuration for Access Point Groups

NETGEAR recommends using the default settings as they are to configure your access

points unless you have specific reasons to change them. You can configure wireless settings

for access points (see

Configuring Wireless Settings

on page 70) or for access point groups.

Channel Width (11n only)

Select the available channel width of the access point. A wider channel improves the

performance, but some legacy devices can operate only on either 20 MHz or 40

MHz.

Guard Interval (11n only)

Select the value that will protect transmissions from interference. A shorter guard

interval improves performance, but some legacy devices can operate only with a long

guard interval.

RTS Threshold (0-2347)

The transmission mechanism (CSMA/CA or CSMA/CD) for the packets. If the packet

size is equal to or less than this threshold, then the data frame is transmitted

immediately. However, if the packet size is larger than the specified value, then the

transmitting station must send out an Request to Send Threshold (RTS) packet to the

receiving station, and then must wait for the receiving station to send back a Clear to

Send (CTS) packet before sending the actual packet data.

Fragmentation Length

(256-2346)

The maximum packet size that used for fragmentation of data packets. Packets

larger than the specified fragmentation length are broken up into smaller packets

before being transmitted. The fragmentation length must be an even number.

Beacon Interval

(100-1000)

The time interval for each beacon transmission that allows the access point to

synchronize the wireless network.

Aggregation Length

(1024-65535, 11n only)

The length that defines the maximum length of Aggregated MAC Protocol Data Unit

(AMPDU) packets. Larger aggregation lengths might sometimes lead to better

network performance. Aggregation is a mechanism used to achieve higher

throughput.

AMPDU (11n only)

Allow the aggregation of several MAC frames into a single large frame to achieve

higher throughput. Enabling AMPDU can sometimes lead to better network

performance.

RIFS Transmission

(11n only)

Enable the Reduced Interframe Space (RIFS) option to allow transmission of

successive frames at different transmit powers. Enabling RIFS can lead to better

network performance.

DTIM Interval (1–255)

Enter the DTIM or the data beacon rate that you want to use. This sets the message

period of the beacon delivery traffic indication in multiples of beacon intervals.

Preamble Type

(11b/bg only)

A long transmit preamble can provide a more reliable connection or a slightly longer

range. A short transmit preamble gives better performance. The

Auto

setting

automatically handles both long and short preambles. The default is Auto.

Table 17.

Wireless Settings (Continued)

Field

Description