Cisco AIR-WLC2006-K9 - Wireless LAN Controller 2006 Guía de usuario Pagina 31
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Cisco Wireless LAN Solution Product Guide
OL-7955-01
Chapter 1 Overview
Layer 2 and Layer 3 LWAPP Operation
Layer 2 and Layer 3 LWAPP Operation
The LWAPP communications between Cisco Wireless LAN Controller and Cisco 1000 series
lightweight access points can be conducted at ISO Data Link Layer 2 or Network Layer 3.
Operational Requirements
The requirement for Layer 2 LWAPP communications is that the Cisco Wireless LAN Controller and
Cisco 1000 series lightweight access points must be connected to each other through Layer 2 devices on
the same subnet. This is the default operational mode for the Cisco Wireless LAN Solution. Note that
when the Cisco Wireless LAN Controller and Cisco 1000 series lightweight access points are on
different subnets, these devices must be operated in Layer 3 mode.
The requirement for Layer 3 LWAPP communications is that the Cisco Wireless LAN Controllers and
Cisco 1000 series lightweight access points can be connected through Layer 2 devices on the same
subnet, or connected through Layer 3 devices across subnets.
Note that all Cisco Wireless LAN Controllers in a mobility group must use the same LWAPP Layer 2 or
Layer 3 mode, or you will defeat the Mobility software algorithm.
Configuration Requirements
When you are operating the Cisco Wireless LAN Solution in Layer 2 mode, you must configure a
management interface to control your Layer 2 communications.
When you are operating the Cisco Wireless LAN Solution in Layer 3 mode, you must configure a
management interface to control your Layer 2 communications, and an AP-Manager interface to control
Cisco 1000 series lightweight access point-to-Cisco Wireless LAN Controller Layer 3 communications.
Radio Resource Management (RRM)
Radio Resource Management (RRM) allows Cisco Wireless LAN Controllers to continually monitor
their associated Cisco 1000 series lightweight access points for the following information:
• Traffic Load — How much total bandwidth is used for transmitting and receiving traffic. This allows
wireless LAN managers to track and plan network growth ahead of client demand.
• Interference — How much traffic is coming from other 802.11 sources.
• Noise — How much non-802.11 noise is interfering with the currently-assigned channel.
• Coverage — Received Signal Strength (RSSI) and Signal to Noise Ratio (SNR) for all clients.
• Nearby access points.
Using the collected information, RRM can periodically reconfigure the 802.11 RF network within
operator-defined limits for best efficiency. To do this, RRM:
• Dynamically reassigns channels to increase capacity and performance, both within the same Cisco
Wireless LAN Controller and across multiple Cisco Wireless LAN Controllers.
• Adjusts the transmit power to balance coverage and capacity, both within the same Cisco Wireless
LAN Controller and across multiple Cisco Wireless LAN Controllers.
- Cisco Wireless LAN Solution 1
- Product Guide 1
- CONTENTS 3
- 3 Solutions 3-1 6
- 9 Using Cisco WCS 9-1 10
- Contents 11
- A Safety Considerations and 12
- Audience 15
- Organization 15
- Conventions 16
- Related Publications 18
- Obtaining Documentation 19
- Documentation Feedback 20
- Submitting a Service Request 22
- Overview 25
- Chapter 1 Overview 26
- Single-Controller Deployments 27
- Operating System Software 29
- Operating System Security 29
- Operational Requirements 31
- Configuration Requirements 31
- Client Roaming 33
- Client Location 34
- External DHCP Servers 35
- Access Control Lists 38
- Identity Networking 39
- Dynamic Frequency Selection 40
- File Transfers 41
- Power over Ethernet 41
- Pico Cell Functionality 42
- Distribution System Ports 46
- AP-Manager Interface 47
- Operator-Defined Interfaces 48
- Virtual Interface 48
- Service Port 49
- Service-Port Interface 49
- Startup Wizard 49
- Lightweight Access Points 56
- External Antenna Connectors 59
- Antenna Sectorization 60
- Using DHCP Option 43 64
- Lightweight Mode 65
- Rogue Access Points 67
- Web User Interface 68
- Command Line Interface 68
- Cisco Wireless Control System 69
- Cisco WCS Base 70
- Cisco WCS Location 71
- Cisco WCS User Interface 71
- Floor Plan Editor 72
- Guidelines for Using the GUI 75
- Opening the GUI 75
- Configuring the GUI for HTTPS 76
- TFTP server IP address 77
- Using the CLI 78
- Logging Out of the CLI 79
- Interfaces 80
- Solutions 83
- Cisco WLAN Solution Security 84
- Layer 3 Solutions 85
- Rogue Access Point Solutions 85
- Integrated Security Solutions 86
- Configuring DHCP 97
- Default Web Auth Operation 99
- OL-7955-01 100
- Chapter 3 Solutions 100
- Changing the Web Message 102
- Changing the Logo 102
- Hiding the Logo 103
- Identity Networking Overview 106
- QoS-Level 107
- ACL-Name 107
- Interface-Name 108
- VLAN-Tag 108
- Tunnel Attributes 109
- Before You Start 112
- Configuring a Country Code 115
- Configuring RADIUS Settings 117
- Configuring SNMP Settings 117
- Configuring Mobility Groups 118
- Configuring the Service Port 119
- Enabling 802.3x Flow Control 120
- Enabling System Logging 120
- Configuring Wireless LANs 121
- Wireless LAN Overview 122
- Activating Wireless LANs 123
- Configuring Layer 2 Security 124
- WEP Keys 125
- Configuring Layer 3 Security 126
- IKE Diffie-Hellman Group 127
- IKE Lifetime Timeout 127
- IPSec Passthrough 127
- Web-Based Authentication 127
- Local Netuser 128
- Configuring Auto Anchoring 129
- Managing Controller Software 131
- Upgrading Controller Software 132
- Saving Configurations 134
- Resetting the Controller 135
- Starting and Stopping WCS 143
- Using Cisco WCS 149
- Using Maps 152
- Adding a Building to a Campus 153
- Using the Map Editor 156
- Monitoring Maps 159
- Locating Clients 164
- Finding Coverage Holes 166
- Installing Cisco WCS 168
- Updating Cisco WCS for Linux 169
- Adding WCS User Accounts 172
- Changing Passwords 172
- Deleting User Accounts 173
- Operating Location Appliances 186
- Safety Considerations and 193
- Translated Safety Warnings 193
- Safety Considerations 194
- Warning Definition 194
- Varoitus 195
- Attention 195
- Avvertenza 195
- Advarsel 195
- ¡Advertencia! 196
- Varning! 196
- Class 1 Laser Product Warning 197
- Produto a laser de classe 1 198
- Klasse 1 laserprodukt 198
- Ground Conductor Warning 199
- Waarschuwing 210
- Controllers 215
- Information 219
- Statement 220
- Canadian Compliance Statement 221
- • Safety: EN 60950 222
- • Radio: EN 301.893 223
- 03-5549-6500 224
- All Access Points 225
- End User License and Warranty 229
- End User License Agreement 230
- Limited Warranty 232
- Disclaimer of Warranty 234
- Additional Open Source Terms 235
- APPENDIX 237
- Gain Pattern 246
- LED Patterns 251
- System Messages 252
- Client Reason Codes 254
- Client Status Codes 255
- Power Alarm 2.4 GHz 5 GHz 256
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