NETSCOUT Systems AM5012-001 802.11a/b/g Wireless Sensor User Manual AirMagnet AM 5012 abg User Guide rev1

Fluke Networks/AirMagnet 802.11a/b/g Wireless Sensor AirMagnet AM 5012 abg User Guide rev1

Users Manual

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Document ID514997
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Document DescriptionUsers Manual
Short Term ConfidentialNo
Permanent ConfidentialNo
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Document TypeUser Manual
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Date Submitted2005-02-14 00:00:00
Date Available2005-02-11 00:00:00
Creation Date2005-02-02 20:38:08
Producing SoftwareAcrobat PDFWriter 5.0 for Windows NT
Document Lastmod2005-02-11 14:05:24
Document TitleAirMagnet AM-5012-abg User Guide rev1.doc
Document CreatorAirMagnet AM-5012-abg User Guide rev1 - Microsoft Word
Document Author: Cathy

AirMagnet AM-5012-11AG
User Guide
© 2004 AirMagnet® , Inc. All rights reserved.
Table of Contents
Definitions and Terminology ...........................................................................................................3
References ........................................................................................................................................5
Introduction......................................................................................................................................6
Expert Analysis Functions Enabled by Sensor ................................................................................8
Enforce Security Policy ...........................................................................................................8
Detect Wireless Intruders and Attacks .....................................................................................8
Lock In Network Performance.................................................................................................9
Ensure Network Reliability......................................................................................................9
Centralizing System Management ...........................................................................................9
Enable Flexible Configuration and User Access......................................................................9
Enable Graphics User Interface from Anywhere in the Network ............................................9
Enable Remote Troubleshooting and Active Tools ................................................................10
Low Overhead On Operational Network...............................................................................10
AirMagnet Sensor Operation Modes ............................................................................................. 11
Configuration Mode................................................................................................................... 11
Analysis Mode ........................................................................................................................... 11
Active Control Mode .................................................................................................................12
Hardware Specifications ................................................................................................................13
Mechanical.................................................................................................................................13
Environmental............................................................................................................................13
Power .........................................................................................................................................13
RF...............................................................................................................................................14
Effective Data Rates ...................................................................................................................15
Physical Interfaces .....................................................................................................................15
Internal .......................................................................................................................................15
Compliance ................................................................................................................................15
Sensor Powering Options...............................................................................................................16
AC Power ...................................................................................................................................16
© 2004 AirMagnet® , Inc. All rights reserved.
Definitions and Terminology
802.3
802.11 a
802.11 b
802.11 g
802.11 e
802.1x
ACK
AGC
AID
BCC
BPSK
CF-End
CFP
CF-Poll
CTS
DA
dB
DBPSK
DCF
DIFS
DPSK
DQPSK
DS
DSSS
EIFS
ESS
ETSI
FCC
FCS
FFT
GFSK
GPS
HR/DSSS
I/Q
IAPP
ICI
ICV
IEEE
IPSEC VPN
IR
ISM
LBT
Acknowledgement frame
Automatic Gain Control
Association Identifier
Binary Convolutional Code
Binary Phase Shift Keying
Contention-Free End
Contention-Free Period
Contention-Free Poll
Clear to Send
Destination Address
Decibels
Differential Binary Phase Shift Keying
Distributed Coordination Function
Distributed Interframe Space
Differential Phase Shift Keying
Differential Quadrature Phase Shift Keying
Distribution System
Direct Sequence Spread Spectrum
Extended Interframe Space
Extended Service Set
European Telecommunications Standards Institute
Federal Communications Commission
Frame Check Sequence
Fast Fourier Transform
Gaussian Frequency Shift Key
Global Positioning System
High Rate Direct Sequence Spread Spectrum
Interphase/Quadrature
Inter-Access Point Protocol
Interchip Interference
Integrity Check Value
Institute of Electrical and Electronics Engineers
Infrared ISI Intersymbol interference
Industrial, Scientific, and Medical
Listen Before Talk
© 2004 AirMagnet® , Inc. All rights reserved.
L2TP VPN
LEAP
LLC
MIB
MIC
MKK
MMACS
MPDU
MSDU
NAV
OFDM
PBCC
PCF
PEAP
PHY
PIFS
PLCP
PMD
PPDU
PPTP VPN
PS
QAM
QPSK
RA
RF
RFID
RSADSI
RTS
SA
SFD
SIFS
SNR
SSH
SSID
STA
TA
TBT
TIM
TKIP
TLS
TSF
TTLS
TU
WEP
WLAN
WPA
Layer 2 Tunneling Protocol VPN
Logical Link Control
Management Information Base
Message Integrity Check
Ministry of Telecommunications
Multimedia Mobile Access Communication System
MAC Protocol Data Unit
MAC Service Data Unit
Network Allocation Vector
Orthogonal Frequency Domain Multiplexing
Packet Binary Convolutional Coding PC Point Coordinator
Point Coordination Function
Physical Layer
Priority Interframe Space
Physical Layer Convergence Procedure
Physical Medium Dependent
PLCP Protocol Data Unit PFSF PLCP Signaling Field
Point to Multiple Point Virtual Private Network
Poll Power Save Poll
Quadrature Amplitude Modulation
Quadrature Phase Shift Keying
Receiver Address
Radio Frequency
Radio Frequency ID
RSA Data Security, Inc.
Request to Send
Source Address
Start of Frame Delimiter
Short Interframe Space
Signal to Noise Ratio
VPN
Service Set Identity
Station
Transmitter Address
Target Beacon Transmission Time
Traffic Indication Map
Timer Synchronization Factor
Time Units
Wireless LAN
© 2004 AirMagnet® , Inc. All rights reserved.
References
Visit http://www.airmagnet.com for the following referenced documents:
Reference 1
Reference 2
Reference 3
Reference 4
AirMagnet Enterprise Datasheet
AirMagnet Enterprise FAQ
AirMagnet Guided Tour
AirMagnet Impact Study
© 2004 AirMagnet® , Inc. All rights reserved.
Introduction
The AirMagnet AM-5012-11AG Sensor provides 24x7 remote monitoring and troubleshooting of
802.11 wireless networks. Sensors are deployed near clusters of access points, and provide
security assessment, performance monitoring, network fault detection and remote
troubleshooting functions. Management staff can easily monitor the security measures in use on
every station and access point device to insure compliance with established policies, and also
automatically scan for dozens of wireless network attacks.
These analysis functions can be monitored and controlled from both centralized and distributed
operations centers. These centers can be located in the building, on the campus, or anywhere in
the world without requiring high travel costs or excessive delay of sending IT expert staff to
remote locations.
Figure 1 shows a complete network including the AM-5012-11AG AirMagnet Sensor.
Companion software functions available for the complete AirMagnet Enterprise system include
the following:
AirMagnet Enterprise Server – provides the dynamic operations control function to the entire
network of bound sensors including sensor activation/deactivation, upgrade of sensor software,
and collection of alerts, data, and statistics for all stations and access points within wireless
segments monitored by the sensors.
Figure 1: WLAN network including AM-5012-11AG AirMagnet Sensors
© 2004 AirMagnet® , Inc. All rights reserved.
AirMagnet Enterprise Console – provides the graphical user interface into the server from any
location in the enterprise wide network.
AirMagnet Enterprise Remote User Interface – provides the graphical user interface into any
individual sensor from any location in the enterprise wide network.
Enterprise Reporter – manages and administers a SQL database of all collected alarms,
monitored traffic, and RF signal/noise information. Also provides a broad set of detailed reports
and trend summaries of key data. Using Reporter the administrator is able to conduct both shortterm and long-term trend analysis and also conduct forward looking capacity planning and
topology reconfiguration planning for the entire wireless network.
© 2004 AirMagnet® , Inc. All rights reserved.
Expert Analysis Functions Enabled by Sensor
The intelligent sensor provides around-the-clock coverage of the entire wireless environment
including all 802.11a, 802.11b, and 802.11g channels and infrastructure. Each individual sensor
is armed with the patent-pending AirWISE Analytical Engine that, in real time, monitors and
analyzes the security, performance, and reliability of the wireless network. The sensor enables
the following categories of expert analysis functions. See ANNEX B for a detailed and full
listing of expert analysis functions.
Enforce Security Policy
New security protocols are continually appearing that close the security gap between WLANs
and their wired counterparts. Nevertheless ensuring that all users and stations comply with these
security measures continues to grow as the major issue for wireless networks. AirMagnet Sensors
address this gap by auditing and validating the security of every Wi-Fi device in the network,
providing managers with an easy process to insure all users employ the appropriate level of
security. Supported protocols include:
•
•
•
•
•
•
•
•
•
•
•
•
•
wep
leap
peap
tkip
mic
802.1x
ttls
tls
wpa
pptp vpn
l2tp vpn
ssh vpn
ipsec vpn
Detect Wireless Intruders and Attacks
As Wi-Fi has grown, so have the number and sophistication of wireless attacks. AirMagnet
Sensors are engineered specifically to counter these threats - scanning the environment for
Rogue APs and War-Drivers, Spoofed MAC Addresses, and a host of Denial of Service Attacks
unique to Wi-Fi. Sensors send encrypted real-time alarms in response to an attack, allowing staff
to respond before network operations is negatively impacted.
© 2004 AirMagnet® , Inc. All rights reserved.
Lock In Network Performance
Radio Frequency transmissions are inherently susceptible to environmental factors such as
physical obstructions and radio interference from a variety of sources. If not identified and
managed, these factors can lead to unacceptable performance for the end-user. To address this
challenge, AirMagnet Sensors constantly monitor and generate alarms on over 20 key indicators
of network health, allowing IT administrators to take a proactive approach toward the
maintenance of the network.
Ensure Network Reliability
WLANs must both have predictable performance and be highly reliable before being considered
industrial grade. The AirMagnet Enterprise System addresses this need with a suite of alarms and
diagnostics that detect network faults and configuration errors that can lead to outages in the
network. These diagnostics are complemented by active utilities to pin down the sources of
connectivity problems in the network.
Centralizing System Management
The AirMagnet Management Server receives information from every AirMagnet Sensor and
provides a centralized SQL database of all network data and alarms. SNMP traps allow for
seamless integration with leading management consoles such as HP Open View and CA
UniCenter. All sensor-to-server traffic is secured via SSL and TLS insuring management
information remains secure while transiting corporate firewalls and VPNs.
Enable Flexible Configuration and User Access
The Management Server maintains configurations for every Sensor in the System, allowing IT
Personnel to tune sensor thresholds appropriately for each location. Additionally, AirMagnet
Enterprise supports three unique administrative user levels, insuring that the users access only
the level of information appropriate for their role and level of responsibility.
Enable Graphics User Interface from Anywhere in the Network
The AirMagnet Management Console provides the User Interface to the AirMagnet Enterprise
System. From the Management Console, Users can view alarms and WLAN health by Campus,
Building, Floor, or by individual Sensor. Consoles can be run securely whether in a NOC, or
remotely on a laptop – keeping administrators connected to the information they need, regardless
of their location.
© 2004 AirMagnet® , Inc. All rights reserved.
Enable Remote Troubleshooting and Active Tools
Using the Remote UI built into the AirMagnet Management Console, Users can leverage a
growing collection of active troubleshooting tools to pinpoint problems in the network. These
tools allow the User to remotely test throughput on a particular AP, diagnose connection
problems, and perform Layer 3dDebugging and end-to-end provisioning. Administrators can
view low level data on every channel and device in the area, alarms, real-time local statistics, and
even packet decodes. Such remote capability greatly reduces the need to dispatch resources
when troubleshooting the WLAN.
Low Overhead On Operational Network
Most remote monitoring systems simply capture wireless packets and resend them to a remote
site for processing, needlessly consuming valuable bandwidth. AirMagnet Sensors, conversely
process locally, sending real-time alarms only when thresholds are reached. Trending data is
saved on the sensor, and securely sent at regular intervals to the Management Server, minimizing
operational load on the network and servers.
© 2004 AirMagnet® , Inc. All rights reserved.
10
AirMagnet Sensor Operation Modes
The Sensor has three operational modes, configuration mode, analysis mode, and active control
mode.
Configuration Mode
The Airmagnet Sensor can be configured both with a serial command line interface (CLI) and
secure HTTPS communications with a remote browser. Key parameters that need to be
configured prior to placing the sensor online include provisioning of the unit’s network
addressing, the server’s network addressing, and the secret key needed for connection to the
server and for administrator logon-override functions. Once the unit is configured it is placed on
the live network and powered up. The sensor can be powered either by an AC-to-DC power
brick or Power-over-Ethernet using an AirMagnet in-line power injector.
After configuration the unit boots up, connects to the server, and receives any additional
configuration parameters. If the administrator has upgraded the sensor software on the server to
a new release, the sensor automatically downloads the software into memory and then writes it to
flash.
Analysis Mode
The majority of the time the sensor is in the analysis mode. The unit scans all configured
channels, measures signal and noise, gathers statistics on management and data traffic, analyzes
security mis-configurations and performance problems, and searches for issues such as rogue
access points and denial of service attacks.
All of the analyzed data is recorded in memory and is reported back to the management server
periodically. The reporting period for accumulated data is configurable. Whenever an event
occurs that generates an alert, such as a security mis-configuration, the alert is sent immediately
to the server.
The administrator can view the consolidated status of the entire network, a subset of the network,
or the specific set monitored and analyzed by an individual sensor. The AirMagnet Enterprise
Console tool is used to view this information collected on the server.
The Analysis mode can be administered from anywhere within the global enterprise network.
© 2004 AirMagnet® , Inc. All rights reserved.
11
Active Control Mode
In active mode the sensor can drill down to an individual access point or station, and diagnose
connection and provisioning problems. Using the Remote User Interface function within the
Console program, the administrator can see a real time display of all scanning and analysis
functions performed by the sensor. He can zero in on channels, individual access points, or
individual stations. He can plot real time displays of all monitored information such as signal,
noise, traffic, and errors. He can also do packet decodes and statistical charting.
The Active Control mode can be administered from anywhere within the global enterprise
network.
© 2004 AirMagnet® , Inc. All rights reserved.
12
Hardware Specifications
The AirMagnet AM-5012-11AG sensor is a robust hardware monitoring analysis device that can
be installed on a shelf, on the wall, or in a ceiling. It can be powered by AC power, or by -48V
Power over Ethernet. The detailed technical specifications are as follows.
Mechanical
Enclosure
Metallic chassis
Dimensions 6.693 in. (17.0 cm) wide; 8.267 in. (21.0 cm) deep
Mounting options
Flat on shelf
Plastic stand for shelf vertical configuration
Wall hanging via dual screw holder at back of housing, or
Using AirMagnet mounting kit for wall and ceiling
Weight
32 oz (909g)
LEDs
Power status
WLAN (5 GHz/2.4 GHz) status
10/100 Base T status
Link status
Switches
Reset switch
RF connectors
Reverse polarity TNC - female
Environmental
Temperature
32º to 131ºF (0º to 55ºC)
Humidity
5 to 95% humidity (non-condensing)
Power
Power supply options
External power adapter w/ 12VDC/1A
© 2004 AirMagnet® , Inc. All rights reserved.
13
RF
Bands
2.4 GHz Band: 802.11b/g
5.25-5.35 GHz Band: 802.11a
5.75 GHz: 802.11a
Country Frequency plans
All worldwide frequency plans (See ANNEX A for detail)
Antenna
Omni-directional
Dual antenna
Receive Sensitivity (Typical @ the antenna ports)
802.11a:
-84dBm @ 6Mbps -77dBm @ 18Mbps -70dBm @ 48Mbps
-82dBm @ 9Mbps -75dBm @ 24Mbps -68dBm @ 54Mbps
-79dBm @ 12Mbps -73dBm @ 36Mbps
802.11b/g:
-91dBm @ 1Mbps -84dBm @ 6Mbps -75dBm @ 24Mbp
-90dBm @ 2Mbps -82dBm @ 9Mbps -73dBm @ 36Mbps
-89dBm @ 5.5Mbps -79dBm @ 12Mbps -70dBm @ 48Mbps
-87dBm @ 11Mbps -77dBm @ 18Mbps -68dBm @ 54Mbps
Transmit Output Power (Typical @ the antenna ports)
7.980mW for 802.11b
10.069mW for 802.11g
17.140mW for 5.150 ~ 5.350GHz
15.922mW for 5.725 ~ 5.825GHz
© 2004 AirMagnet® , Inc. All rights reserved.
14
Effective Data Rates
802.11a
6, 9, 12, 18, 24, 36, 48, 54 Mbps
802.11g
6, 9, 12, 18, 24, 36, 48 & 54Mbps
802.11b
1, 2, 5.5, 11Mbps
Physical Interfaces
Network port
RJ45 Ethernet 10/100 Base T
Serial Port
RS232 DB9
115,200 bps; 8 data bits; no parity; 1 stop bit; no flow control
Internal
Processor
IDT RC32438 200Mhz
Memory
64 Mbytes RAM
8 Mbytes FLASH
Radio
Dual radio – 802.11 a & b/g
Atheros MAC and PHY
Compliance
FCC Part 15C
CE 0560
EN60950 (equivalent UL ETSI 300/328)
IC (Canadian Radio Regulations)
Japan Equipment Radio Regulations
© 2004 AirMagnet® , Inc. All rights reserved.
15
Sensor Powering Options
AC Power
The unit can be powered with AC power. An AC-to-DC power supply converts from AC to 12V
DC.
© 2004 AirMagnet® , Inc. All rights reserved.
16
Federal Communication Commission Interference Statement
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that
to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
FCC Caution: Any changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate this equipment.
IMPORTANT NOTE:
FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.
This equipment should be installed and operated with minimum distance 20cm between the radiator &
your body. To maintain compliance with FCC RF exposure compliance requirements, please avoid direct
contact to the transmitting antenna during transmitting.
If this device is going to be operated in 5.15 ~ 5.25GHz frequency range, then it is restricted in indoor
environment only.
This transmitter must not be co-located or operating in conjunction with any other antenna or
transmitter.
Airmagnet declares that the AM-5012-11AG (FCC ID: RD7-AM5012-001 ) is limited in CH1~CH11 by
specified firmware controlled in the USA
Canada (IC):
To prevent radio interference to the licensed service, this device is intended to be operated indoors
and away from windows to provide maximum shielding. Equipment (or its transmit antenna) that is
installed outdoors is subject to licensing. 1.Operation is subject to the following two conditions: 1) this
device may not cause interference and 2) this device must accept any interference, including interference
that may cause undesired operation of the device.
This device has been designed to operate with an antenna having a maximum gain of 6 dBi. Antenna
having a higher gain is strictly prohibited per regulations of Industry Canada. Therequired antenna
impedance is 50 ohms.
© 2004 AirMagnet® , Inc. All rights reserved.
17

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