ZyXEL Communications NXC2500 User manual

Quick Start Guide
www.zyxel.com
NXC2500
Wireless LAN Controller
Version 4.00
Edition 1, 05/2013
Copyright © 2013 ZyXEL Communications Corporation
User’s Guide
Default Login Details
IP Address https://192.168.1.1
User Name admin
Password 1234

NXC2500 User’s Guide2
IMPORTANT!
READ CAREFULLY BEFORE USE.
KEEP THIS GUIDE FOR FUTURE REFERENCE.
Screenshots and graphics in this book may differ slightly from your product due to differences in
your product firmware or your computer operating system. Every effort has been made to ensure
that the information in this manual is accurate.
Related Documentation
•QuickStartGuide
The Quick Start Guide is designed to show you how to make the NXC hardware connections and
access the Web Configurator.
• CLI Reference Guide
The CLI Reference Guide explains how to use the Command-Line Interface (CLI) and CLI
commands to configure the NXC.
Note: It is recommended you use the Web Configurator to configure the NXC.
• Web Configurator Online Help
Click the help icon in any screen for help in configuring that screen and supplementary
information.

Contents Overview
NXC2500 User’s Guide 3
Contents Overview
User’s Guide .......................................................................................................................................15
Introduction .............................................................................................................................................17
Hardware Installation and Connection ....................................................................................................23
The Web Configurator .............................................................................................................................29
Technical Reference ..........................................................................................................................47
Dashboard ...............................................................................................................................................49
Monitor ....................................................................................................................................................59
Registration .............................................................................................................................................85
Wireless ..................................................................................................................................................89
Interfaces ..............................................................................................................................................103
Policy and Static Routes .......................................................................................................................125
Zones ....................................................................................................................................................135
NAT .......................................................................................................................................................139
ALG .......................................................................................................................................................147
IP/MAC Binding .....................................................................................................................................149
Captive Portal ........................................................................................................................................155
User/Group ............................................................................................................................................169
AP Profile ..............................................................................................................................................187
MON Profile ...........................................................................................................................................203
Addresses .............................................................................................................................................209
Services ................................................................................................................................................215
Schedules .............................................................................................................................................221
AAA Server ...........................................................................................................................................227
Authentication Method ..........................................................................................................................238
Certificates ............................................................................................................................................241
System ..................................................................................................................................................259
Log and Report .....................................................................................................................................297
File Manager .........................................................................................................................................313
Diagnostics ............................................................................................................................................325
Packet Flow Explore .............................................................................................................................337
Reboot ...................................................................................................................................................345
Shutdown ..............................................................................................................................................347
Troubleshooting ....................................................................................................................................349

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Table of Contents
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Table of Contents
Contents Overview ..............................................................................................................................3
Table of Contents .................................................................................................................................5
Part I: User’s Guide .........................................................................................15
Chapter 1
Introduction.........................................................................................................................................17
1.1 Overview ...........................................................................................................................................17
1.2 Zones, Interfaces, and Physical Ports ...............................................................................................17
1.2.1 Interface Types ........................................................................................................................17
1.2.2 Example Interface and Zone Configuration .............................................................................18
1.3 Applications .......................................................................................................................................19
1.3.1 AP Management ......................................................................................................................19
1.3.2 Wireless Security .....................................................................................................................19
1.3.3 Captive Portal ..........................................................................................................................20
1.3.4 Load Balancing ........................................................................................................................20
1.3.5 Dynamic Channel Selection ....................................................................................................20
1.3.6 User-Aware Access Control .....................................................................................................20
1.4 Management Overview .....................................................................................................................21
1.5 Object-based Configuration ..............................................................................................................21
1.6 Starting and Stopping the NXC .........................................................................................................22
Chapter 2
Hardware Installation and Connection .............................................................................................23
2.1 Rack-mounted Installation .................................................................................................................23
2.1.1 Rack-Mounted Installation Procedure ......................................................................................23
2.2 Front Panel ........................................................................................................................................25
2.2.1 Front Panel LEDs ....................................................................................................................26
2.3 Rear Panel ........................................................................................................................................27
Chapter 3
The Web Configurator........................................................................................................................29
3.1 Overview ...........................................................................................................................................29
3.2 Access ...............................................................................................................................................29
3.3 The Main Screen ...............................................................................................................................31
3.3.1 Title Bar ...................................................................................................................................31
3.3.2 Navigation Panel .....................................................................................................................38

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3.3.3 Warning Messages ..................................................................................................................41
3.3.4 Tables and Lists .......................................................................................................................41
Part II: Technical Reference............................................................................47
Chapter 4
Dashboard...........................................................................................................................................49
4.1 Overview ...........................................................................................................................................49
4.1.1 What You Can Do in this Chapter ............................................................................................49
4.2 Dashboard .........................................................................................................................................50
4.2.1 CPU Usage ..............................................................................................................................54
4.2.2 Memory Usage ........................................................................................................................55
4.2.3 Session Usage ........................................................................................................................56
4.2.4 DHCP Table .............................................................................................................................57
4.2.5 Number of Login Users ............................................................................................................58
Chapter 5
Monitor.................................................................................................................................................59
5.1 Overview ...........................................................................................................................................59
5.1.1 What You Can Do in this Chapter ............................................................................................59
5.2 What You Need to Know ...................................................................................................................60
5.3 Port Statistics ...................................................................................................................................60
5.3.1 Port Statistics Graph ...............................................................................................................62
5.4 Interface Status .................................................................................................................................63
5.5 Traffic Statistics .................................................................................................................................64
5.6 Session Monitor ...............................................................................................................................67
5.7 IP/MAC Binding Monitor ....................................................................................................................69
5.8 Login Users ......................................................................................................................................70
5.9 Dynamic Guest .................................................................................................................................70
5.10 USB Storage ..................................................................................................................................71
5.11 AP List ............................................................................................................................................73
5.11.1 Station Count of AP ...............................................................................................................74
5.12 Radio List .......................................................................................................................................75
5.12.1 AP Mode Radio Information ..................................................................................................77
5.13 Station List ......................................................................................................................................78
5.14 Detected Device .............................................................................................................................79
5.15 View Log .........................................................................................................................................80
5.16 View AP Log ...................................................................................................................................83
Chapter 6
Registration.........................................................................................................................................85

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6.1 Overview ...........................................................................................................................................85
6.1.1 What You Can Do in this Chapter ............................................................................................85
6.1.2 What you Need to Know ..........................................................................................................85
6.2 Registration .......................................................................................................................................86
6.3 Service ..............................................................................................................................................87
Chapter 7
Wireless...............................................................................................................................................89
7.1 Overview ...........................................................................................................................................89
7.1.1 What You Can Do in this Chapter ............................................................................................89
7.1.2 What You Need to Know ..........................................................................................................89
7.2 Controller ..........................................................................................................................................90
7.3 AP Management ...............................................................................................................................90
7.3.1 Edit AP List .............................................................................................................................92
7.4 MON Mode ........................................................................................................................................93
7.4.1 Add/Edit Rogue/Friendly List ...................................................................................................94
7.5 Load Balancing .................................................................................................................................95
7.5.1 Disassociating and Delaying Connections ..............................................................................96
7.6 DCS ..................................................................................................................................................97
7.7 Technical Reference ........................................................................................................................100
7.7.1 Dynamic Channel Selection ..................................................................................................100
7.7.2 Load Balancing ......................................................................................................................101
Chapter 8
Interfaces...........................................................................................................................................103
8.1 Interface Overview ..........................................................................................................................103
8.1.1 What You Can Do in this Chapter ..........................................................................................103
8.1.2 What You Need to Know ........................................................................................................103
8.2 Ethernet Summary .........................................................................................................................104
8.2.1 Edit Ethernet .........................................................................................................................105
8.2.2 Object References ................................................................................................................. 111
8.2.3 Add/Edit DHCP Extended Options ........................................................................................ 111
8.3 VLAN Interfaces .............................................................................................................................113
8.3.1 VLAN Summary .....................................................................................................................115
8.3.2 Add/Edit VLAN ......................................................................................................................116
8.4 Technical Reference ........................................................................................................................121
Chapter 9
Policy and Static Routes..................................................................................................................125
9.1 Overview .........................................................................................................................................125
9.1.1 What You Can Do in this Chapter ..........................................................................................125
9.1.2 What You Need to Know .......................................................................................................125
9.2 Policy Route ...................................................................................................................................126

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9.2.1 Add/Edit Policy Route ............................................................................................................129
9.3 Static Route ....................................................................................................................................131
9.3.1 Static Route Setting ...............................................................................................................132
9.4 Technical Reference ........................................................................................................................133
Chapter 10
Zones .................................................................................................................................................135
10.1 Overview .......................................................................................................................................135
10.1.1 What You Can Do in this Chapter ........................................................................................135
10.1.2 What You Need to Know ......................................................................................................135
10.2 Zone ..............................................................................................................................................136
10.2.1 Add/Edit Zone .....................................................................................................................137
Chapter 11
NAT.....................................................................................................................................................139
11.1 Overview .......................................................................................................................................139
11.1.1 What You Can Do in this Chapter ........................................................................................139
11.2 NAT Summary ...............................................................................................................................139
11.2.1 Add/Edit NAT .......................................................................................................................141
11.3 Technical Reference ......................................................................................................................144
Chapter 12
ALG ....................................................................................................................................................147
12.1 Overview .......................................................................................................................................147
12.1.1 What You Can Do in this Chapter ........................................................................................147
12.1.2 What You Need to Know ......................................................................................................147
12.1.3 Before You Begin .................................................................................................................147
12.2 ALG ..............................................................................................................................................148
12.3 Technical Reference ......................................................................................................................148
Chapter 13
IP/MAC Binding.................................................................................................................................149
13.1 Overview .......................................................................................................................................149
13.1.1 What You Can Do in this Chapter ........................................................................................149
13.1.2 What You Need to Know ......................................................................................................149
13.2 IP/MAC Binding Summary ............................................................................................................150
13.2.1 Edit IP/MAC Binding ............................................................................................................151
13.2.2 Add/Edit Static DHCP Rule ..................................................................................................152
13.3 IP/MAC Binding Exempt List .........................................................................................................153
Chapter 14
Captive Portal....................................................................................................................................155
14.1 Overview .......................................................................................................................................155

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14.1.1 Captive Portal Type .............................................................................................................156
14.1.2 What You Can Do in this Chapter ........................................................................................156
14.2 Captive Portal ................................................................................................................................157
14.2.1 Add Exceptional Services ....................................................................................................159
14.2.2 Auth. Policy Add/Edit ...........................................................................................................160
14.3 Login Page ....................................................................................................................................162
14.3.1 Custom Login and Access Pages ........................................................................................164
14.3.2 External or Uploaded Web Portal Details ............................................................................166
Chapter 15
User/Group........................................................................................................................................169
15.1 Overview .......................................................................................................................................169
15.1.1 What You Can Do in this Chapter ........................................................................................169
15.1.2 What You Need To Know .....................................................................................................169
15.2 User Summary ..............................................................................................................................172
15.2.1 Add/Edit User ......................................................................................................................173
15.3 Group Summary ............................................................................................................................175
15.3.1 Add/Edit Group ...................................................................................................................176
15.4 Setting ..........................................................................................................................................176
15.4.1 Edit User Authentication Timeout Settings ..........................................................................180
15.4.2 Add/Edit Dynamic Guest Group ..........................................................................................181
15.4.3 User Aware Login Example .................................................................................................182
15.4.4 Guest Manager Login Example ...........................................................................................183
15.5 MAC Address ................................................................................................................................185
15.5.1 Add/Edit MAC Address ........................................................................................................186
Chapter 16
AP Profile...........................................................................................................................................187
16.1 Overview .......................................................................................................................................187
16.1.1 What You Can Do in this Chapter ........................................................................................187
16.1.2 What You Need To Know .....................................................................................................187
16.2 Radio .............................................................................................................................................188
16.2.1 Add/Edit Radio Profile .........................................................................................................190
16.3 SSID .............................................................................................................................................193
16.3.1 SSID List ..............................................................................................................................193
16.3.2 Security List .........................................................................................................................196
16.3.3 MAC Filter List .....................................................................................................................201
Chapter 17
MON Profile .......................................................................................................................................203
17.1 Overview .......................................................................................................................................203
17.1.1 What You Can Do in this Chapter ........................................................................................203
17.1.2 What You Need To Know .....................................................................................................203

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17.2 MON Profile ...................................................................................................................................204
17.2.1 Add/Edit MON Profile ..........................................................................................................205
17.3 Technical Reference ......................................................................................................................206
Chapter 18
Addresses .........................................................................................................................................209
18.1 Overview .......................................................................................................................................209
18.1.1 What You Can Do in this Chapter ........................................................................................209
18.1.2 What You Need To Know .....................................................................................................209
18.2 Address Summary .........................................................................................................................209
18.2.1 Add/Edit Address ................................................................................................................210
18.3 Address Group Summary ..............................................................................................................211
18.3.1 Add/Edit Address Group Rule ............................................................................................212
Chapter 19
Services.............................................................................................................................................215
19.1 Overview .......................................................................................................................................215
19.1.1 What You Can Do in this Chapter ........................................................................................215
19.1.2 What You Need to Know ......................................................................................................215
19.2 Service Summary ..........................................................................................................................216
19.2.1 Add/Edit Service Rule .........................................................................................................217
19.3 Service Group Summary ..............................................................................................................218
19.3.1 Add/Edit Service Group Rule ..............................................................................................219
Chapter 20
Schedules..........................................................................................................................................221
20.1 Overview .......................................................................................................................................221
20.1.1 What You Can Do in this Chapter ........................................................................................221
20.1.2 What You Need to Know ......................................................................................................221
20.2 Schedule Summary .......................................................................................................................222
20.2.1 Add/Edit Schedule One-Time Rule .....................................................................................223
20.2.2 Add/Edit Schedule Recurring Rule .....................................................................................224
Chapter 21
AAA Server........................................................................................................................................227
21.1 Overview .......................................................................................................................................227
21.1.1 What You Can Do in this Chapter ........................................................................................227
21.1.2 What You Need To Know .....................................................................................................227
21.2 Active Directory / LDAP .................................................................................................................230
21.2.1 Add/Edit Active Directory / LDAP Server .............................................................................232
21.3 RADIUS .........................................................................................................................................235
21.3.1 Add/Edit RADIUS ...............................................................................................................236

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Chapter 22
Authentication Method.....................................................................................................................238
22.1 Overview .......................................................................................................................................238
22.1.1 What You Can Do in this Chapter ........................................................................................238
22.1.2 Before You Begin .................................................................................................................238
22.2 Authentication Method ..................................................................................................................238
22.2.1 Add Authentication Method .................................................................................................239
Chapter 23
Certificates ........................................................................................................................................241
23.1 Overview .......................................................................................................................................241
23.1.1 What You Can Do in this Chapter ........................................................................................241
23.1.2 What You Need to Know ......................................................................................................241
23.1.3 Verifying a Certificate ...........................................................................................................243
23.2 My Certificates .............................................................................................................................244
23.2.1 Add My Certificates .............................................................................................................246
23.2.2 Edit My Certificates ..............................................................................................................249
23.2.3 Import Certificates ..............................................................................................................251
23.3 Trusted Certificates .......................................................................................................................252
23.3.1 Edit Trusted Certificates ......................................................................................................254
23.3.2 Import Trusted Certificates ..................................................................................................256
23.4 Technical Reference ......................................................................................................................257
Chapter 24
System...............................................................................................................................................259
24.1 Overview .......................................................................................................................................259
24.1.1 What You Can Do in this Chapter ........................................................................................259
24.2 Host Name ....................................................................................................................................260
24.3 USB Storage .................................................................................................................................260
24.4 Date and Time ..............................................................................................................................261
24.4.1 Pre-defined NTP Time Servers List .....................................................................................263
24.4.2 Time Server Synchronization ...............................................................................................263
24.5 Console Speed ..............................................................................................................................264
24.6 DNS Overview ..............................................................................................................................265
24.6.1 DNS Server Address Assignment .......................................................................................265
24.6.2 Configuring the DNS Screen ...............................................................................................265
24.6.3 Address Record ..................................................................................................................268
24.6.4 PTR Record .........................................................................................................................268
24.6.5 Adding an Address/PTR Record .........................................................................................268
24.6.6 Domain Zone Forwarder .....................................................................................................269
24.6.7 Add Domain Zone Forwarder ..............................................................................................269
24.6.8 MX Record ..........................................................................................................................270
24.6.9 Add MX Record ...................................................................................................................270

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24.6.10 Add Service Control ...........................................................................................................270
24.7 WWW Overview ...........................................................................................................................271
24.7.1 Service Access Limitations ..................................................................................................271
24.7.2 System Timeout ...................................................................................................................272
24.7.3 HTTPS .................................................................................................................................272
24.7.4 Configuring WWW Service Control .....................................................................................273
24.7.5 Service Control Rules ..........................................................................................................275
24.7.6 HTTPS Example ..................................................................................................................276
24.8 SSH ............................................................................................................................................282
24.8.1 How SSH Works ..................................................................................................................283
24.8.2 SSH Implementation on the NXC ........................................................................................284
24.8.3 Requirements for Using SSH ...............................................................................................284
24.8.4 Configuring SSH ..................................................................................................................284
24.8.5 Examples of Secure Telnet Using SSH ...............................................................................285
24.9 Telnet ............................................................................................................................................287
24.10 FTP ............................................................................................................................................288
24.11 SNMP .........................................................................................................................................290
24.11.1 Supported MIBs .................................................................................................................291
24.11.2 SNMP Traps ......................................................................................................................291
24.11.3 Configuring SNMP .............................................................................................................291
24.12 Authentication Server .................................................................................................................292
24.12.1 Add/Edit RADIUS Client ...................................................................................................294
24.13 Language ...................................................................................................................................295
Chapter 25
Log and Report .................................................................................................................................297
25.1 Overview .......................................................................................................................................297
25.1.1 What You Can Do In this Chapter ........................................................................................297
25.2 Email Daily Report ........................................................................................................................297
25.3 Log Settings .................................................................................................................................299
25.3.1 Log Settings Summary ........................................................................................................300
25.3.2 Edit System Log Settings ...................................................................................................302
25.3.3 Edit USB Storage Log Settings ...........................................................................................304
25.3.4 Edit Remote Server Log Settings .......................................................................................307
25.3.5 Log Category Settings ........................................................................................................308
Chapter 26
File Manager......................................................................................................................................313
26.1 Overview .......................................................................................................................................313
26.1.1 What You Can Do in this Chapter ........................................................................................313
26.1.2 What you Need to Know ......................................................................................................313
26.2 Configuration File ..........................................................................................................................315
26.3 Firmware Package .......................................................................................................................319

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26.4 Shell Script ...................................................................................................................................321
Chapter 27
Diagnostics .......................................................................................................................................325
27.1 Overview .......................................................................................................................................325
27.1.1 What You Can Do in this Chapter ........................................................................................325
27.2 Diagnostics ...................................................................................................................................325
27.2.1 Diagnostics Files .................................................................................................................326
27.3 Packet Capture ............................................................................................................................327
27.3.1 Packet Capture Files ..........................................................................................................329
27.3.2 Example of Viewing a Packet Capture File ..........................................................................330
27.4 Core Dump ....................................................................................................................................330
27.4.1 Core Dump Files ..................................................................................................................331
27.5 System Log ..................................................................................................................................332
27.6 Wireless Frame Capture ..............................................................................................................333
27.6.1 Wireless Frame Capture Files ............................................................................................334
Chapter 28
Packet Flow Explore.........................................................................................................................337
28.1 Overview .......................................................................................................................................337
28.1.1 What You Can Do in this Chapter ........................................................................................337
28.2 The Routing Status Screen ...........................................................................................................337
28.3 The SNAT Status Screen ..............................................................................................................340
Chapter 29
Reboot ...............................................................................................................................................345
29.1 Overview .......................................................................................................................................345
29.1.1 What You Need To Know .....................................................................................................345
29.2 Reboot ...........................................................................................................................................345
Chapter 30
Shutdown...........................................................................................................................................347
30.1 Overview .......................................................................................................................................347
30.1.1 What You Need To Know .....................................................................................................347
30.2 Shutdown ......................................................................................................................................347
Chapter 31
Troubleshooting................................................................................................................................349
31.1 Overview .......................................................................................................................................349
31.1.1 General ................................................................................................................................349
31.1.2 Wireless ...............................................................................................................................354
31.2 Resetting the NXC ........................................................................................................................356
31.3 Getting More Troubleshooting Help ..............................................................................................357

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Appendix A Log Descriptions...........................................................................................................359
Appendix B Common Services........................................................................................................387
Appendix C Importing Certificates ...................................................................................................391
Appendix D Wireless LANs..............................................................................................................405
Appendix E Legal Information..........................................................................................................417
Index ..................................................................................................................................................421

15
PART I
User’s Guide

16

NXC2500 User’s Guide 17
CHAPTER 1
Introduction
1.1 Overview
The NXC is a comprehensive wireless LAN controller. Its flexible configuration helps network
administrators set up wireless LAN networks and efficiently enforce security policies over them. In
addition, the NXC provides excellent throughput, making it an ideal solution for reliable, secure
service.
The NXC’s security features include certificates. It also provides captive portal configuration, NAT,
port forwarding, policy routing, DHCP server, extensive wireless AP control options, and many other
powerful features. Flexible configuration helps you set up the network and enforce security policies
efficiently.
The front panel physical Gigabit Ethernet ports (labeled P1, P2, P3, and so on) are mapped to
Gigabit Ethernet (ge) interfaces. By default P1 is mapped to ge1, P2 is mapped to ge2 and so on.
• The default LAN IP address is 192.168.1.1.
• The default administrator login user name and password are “admin” and “1234” respectively.
1.2 Zones, Interfaces, and Physical Ports
Here is an overview of zones, interfaces, and physical ports in the NXC.
1.2.1 Interface Types
There are two types of interfaces in the NXC. In addition to being used in various features,
interfaces also describe the network that is directly connected to it.
•Ethernet interfaces are the foundation for defining other interfaces and network policies.
Table 1 Zones, Interfaces, and Physical Ethernet Ports
Zones
(LAN)
A zone is a group of interfaces.
Interfaces
(Ethernet, VLAN)
Interfaces are logical entities that (layer-3) packets pass through. Use interfaces in
configuring zones, policy routes, static routes, and NAT.
Port combine physical ports into interfaces.
Physical Ethernet
Ports
(P1, P2, P3, and so
on)
The physical port is where you connect a cable.

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•VLAN interfaces recognize tagged frames. The NXC automatically adds or removes the tags as
needed. Each VLAN can only be associated with one Ethernet interface.
Note: By default, all Ethernet interfaces are placed into vlan0, allowing the NXC to
function as a bridge device.
1.2.2 Example Interface and Zone Configuration
This section introduces the NXC’s default zone member physical interfaces and the default
configuration of those interfaces. The following figure uses letters to denote public IP addresses or
part of a private IP address.
Figure 1 Default Network Topology
Table 2 NXC Sample Topology
•TheLAN zone contains the ge1~ ge6 interfaces (physical ports P1~P6). By default, all LAN
interfaces are put in vlan0.
•Theconsole port is not in a zone and can be directly accessed by a computer attached to it using
a special console-to-Ethernet adapter.
PORT INTERFACE ZONE IP ADDRESS AND DHCP
SETTINGS SUGGESTED USE WITH DEFAULT SETTINGS
P1~P6 ge1~ge6 LAN
(vlan0) 192.168.1.1, DHCP server enabled Dedicated LAN connections
CONSOLE N/A None None Local management

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NXC2500 User’s Guide 19
1.3 Applications
These are some example applications for your NXC.
1.3.1 AP Management
Manage multiple separate Access Points (APs) from a single, persistent location. APs can also be
configured to monitor for rogue APs.
Figure 2 AP Management Example
Here, the NXC (A) connects to a number of Power over Ethernet (PoE) devices (B). They connect
to the managed Access Points (C), such as NWA5160N, NWA5550-N, NWA5560-N, NWA5121-NI or
NWA5123-NI, which in turn provide access to the network for the wireless clients (D) within their
broadcast radius.
1.3.2 Wireless Security
Keep the connections between wireless clients and your APs secure with the NXC’s comprehensive
wireless security tools. APs can be configured to require WEP and WPA encryption from all wireless
clients attempting to associate with them. Furthermore, you can protect your network by
monitoring for rogue APs. Rogue APs are wireless access points operating in a network’s coverage
area that are not under the control of the network’s administrators, and can potentially open up
critical holes in a network’s security policy.
Note: Monitoring for rogue APs is not supported by the NWA5121-N, NWA5121-NI and
NWA5123-NI when they are in managed AP mode.
A
BC
D

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1.3.3 Captive Portal
The NXC can be configured with a captive portal, which intercepts all network traffic, regardless of
address or port, until a connecting user authenticates his or her session, through a designated login
Web page.
Figure 3 Applications: Captive Portal
The captive portal page only appears once per authentication session. Unless a session times out or
a user closes the connection, he or she generally will not see it again during the same session.
1.3.4 Load Balancing
With load balancing you can easily distribute wireless traffic across multiple APs to relieve strain on
your network. When a station becomes overloaded, it can automatically delay a connection until the
client associates with another network, or it can alternatively disassociate idle clients or those
clients with weak connections from the network.
1.3.5 Dynamic Channel Selection
The NXC can automatically select the radio channel upon which its APs broadcast by scanning the
area around those APs and determining what channels are currently being used by other devices
not connected to the network.
1.3.6 User-Aware Access Control
Set up security policies that restrict access to sensitive information and shared resources based on
the user who is trying to access it.