EliteConnect™ 2.4GHz 802.11g
Wireless Access Point
User Guide
The easy way to make all your network connections
38 Tesla
Irvine, CA 92618
Phone: (949) 679-8000
April 2004
Revision Number: R01, F2.0.22
Copyright
Information furnished by SMC Networks, Inc. (SMC) is believed to be accurate and reliable.
However, no responsibility is assumed by SMC for its use, nor for any infringements of patents
or other rights of third parties which may result from its use. No license is granted by
implication or otherwise under any patent or patent rights of SMC. SMC reserves the right to
change specifications at any time without notice.
SMC is a registered trademark; and EliteConnect is a trademark of SMC Networks, Inc. Other
product and company names are trademarks or registered trademarks of their respective
holders.
LIMITED WARRANTY
Limited Warranty Statement: SMC Networks, Inc. (“SMC”) warrants its products
to be free from defects in workmanship and materials, under normal use and
service, for the applicable warranty term. All SMC products carry a standard
90-day limited warranty from the date of purchase from SMC or its Authorized
Reseller. SMC may, at its own discretion, repair or replace any product not
operating as warranted with a similar or functionally equivalent product, during the
applicable warranty term. SMC will endeavor to repair or replace any product
returned under warranty within 30 days of receipt of the product.
The standard limited warranty can be upgraded to a Limited Lifetime* warranty by
registering new products within 30 days of purchase from SMC or its Authorized
Reseller. Registration can be accomplished via the enclosed product registration
card or online via the SMC Web site. Failure to register will not affect the standard
limited warranty. The Limited Lifetime warranty covers a product during the Life of
that Product, which is defined as the period of time during which the product is an
“Active” SMC product. A product is considered to be “Active” while it is listed on
the current SMC price list. As new technologies emerge, older technologies
become obsolete and SMC will, at its discretion, replace an older product in its
product line with one that incorporates these newer technologies. At that point, the
obsolete product is discontinued and is no longer an “Active” SMC product. A list
of discontinued products with their respective dates of discontinuance can be
found at:
http://www.smc.com/index.cfm?action=customer_service_warranty.
All products that are replaced become the property of SMC. Replacement
products may be either new or reconditioned. Any replaced or repaired product
carries either a 30-day limited warranty or the remainder of the initial warranty,
whichever is longer. SMC is not responsible for any custom software or firmware,
configuration information, or memory data of Customer contained in, stored on, or
integrated with any products returned to SMC pursuant to any warranty. Products
returned to SMC should have any customer-installed accessory or add-on
components, such as expansion modules, removed prior to returning the product
for replacement. SMC is not responsible for these items if they are returned with
the product.
Customers must contact SMC for a Return Material Authorization number prior to
returning any product to SMC. Proof of purchase may be required. Any product
returned to SMC without a valid Return Material Authorization (RMA) number
clearly marked on the outside of the package will be returned to customer at
customer’s expense. For warranty claims within North America, please call our
toll-free customer support number at (800) 762-4968.
i
LIMITED WARRANTY
Customers are responsible for all shipping charges from their facility to SMC. SMC
is responsible for return shipping charges from SMC to customer.
WARRANTIES EXCLUSIVE: IF AN SMC PRODUCT DOES NOT OPERATE AS
WARRANTED ABOVE, CUSTOMER’S SOLE REMEDY SHALL BE REPAIR OR
REPLACEMENT OF THE PRODUCT IN QUESTION, AT SMC’S OPTION. THE
FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN
LIEU OF ALL OTHER WARRANTIES OR CONDITIONS, EXPRESS OR
IMPLIED, EITHER IN FACT OR BY OPERATION OF LAW, STATUTORY OR
OTHERWISE, INCLUDING WARRANTIES OR CONDITIONS OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. SMC
NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO ASSUME
FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE SALE,
INSTALLATION, MAINTENANCE OR USE OF ITS PRODUCTS. SMC SHALL
NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND
EXAMINATION DISCLOSE THE ALLEGED DEFECT IN THE PRODUCT DOES
NOT EXIST OR WAS CAUSED BY CUSTOMER’S OR ANY THIRD PERSON’S
MISUSE, NEGLECT, IMPROPER INSTALLATION OR TESTING,
UNAUTHORIZED ATTEMPTS TO REPAIR, OR ANY OTHER CAUSE BEYOND
THE RANGE OF THE INTENDED USE, OR BY ACCIDENT, FIRE, LIGHTNING,
OR OTHER HAZARD.
LIMITATION OF LIABILITY: IN NO EVENT, WHETHER BASED IN CONTRACT
OR TORT (INCLUDING NEGLIGENCE), SHALL SMC BE LIABLE FOR
INCIDENTAL, CONSEQUENTIAL, INDIRECT, SPECIAL, OR PUNITIVE
DAMAGES OF ANY KIND, OR FOR LOSS OF REVENUE, LOSS OF BUSINESS,
OR OTHER FINANCIAL LOSS ARISING OUT OF OR IN CONNECTION WITH
THE SALE, INSTALLATION, MAINTENANCE, USE, PERFORMANCE, FAILURE,
OR INTERRUPTION OF ITS PRODUCTS, EVEN IF SMC OR ITS AUTHORIZED
RESELLER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
SOME STATES DO NOT ALLOW THE EXCLUSION OF IMPLIED WARRANTIES
OR THE LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR
CONSUMER PRODUCTS, SO THE ABOVE LIMITATIONS AND EXCLUSIONS
MAY NOT APPLY TO YOU. THIS WARRANTY GIVES YOU SPECIFIC LEGAL
RIGHTS, WHICH MAY VARY FROM STATE TO STATE. NOTHING IN THIS
WARRANTY SHALL BE TAKEN TO AFFECT YOUR STATUTORY RIGHTS.
* SMC will provide warranty service for one year following discontinuance from
the active SMC price list. Under the limited lifetime warranty, internal and
external power supplies, fans, and cables are covered by a standard one-year
warranty from date of purchase.
SMC Networks, Inc.
38 Tesla
Irvine, CA 92618
ii
COMPLIANCES
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
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. 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.
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 a
minimum distance of 20 centimeters (8 inches) between the radiator and your
body. This transmitter must not be co-located or operating in conjunction with any
other antenna or transmitter.
Wireless 2.4 GHz Band Statements:
As the SMC2552W-G Access Point can operate in the 2412-2462 MHz frequency
band it is limited by the FCC, Industry Canada and some other countries to indoor
use only so as to reduce the potential for harmful interference to co-channel
Mobile Satellite systems.
iii
COMPLIANCES
The term “IC:” before the radio certification number only signifies that Industry
Canada technical specifications were met.
Industry Canada - Class B
This digital apparatus does not exceed the Class B limits for radio noise emissions
from digital apparatus as set out in the interference-causing equipment standard
entitled “Digital Apparatus,” ICES-003 of Industry Canada.
Cet appareil numérique respecte les limites de bruits radioélectriques applicables
aux appareils numériques de Classe B prescrites dans la norme sur le matérial
brouilleur: “Appareils Numériques,” NMB-003 édictée par l’Industrie.
Australia/New Zealand AS/NZS 4771
ACN 066 352010
Contact SMC at:
SMC Networks, Inc.
38 Tesla
Irvine, CA 92618
Phone: (949) 679-8000
iv
C
OMPLIANCES
EC Conformance Declaration
SMC contact for these products in Europe is:
SMC Networks Europe,
Edificio Conata II,
Calle Fructuós Gelabert 6-8, 2
08970 - Sant Joan Despí,
Barcelona, Spain.
Marking by the above symbol indicates compliance with the Essential Requirements of the R&TTE Directive of the European Union (1999/5/EC). This equipment meets the following conformance standards:
• EN 60950 (IEC 60950) - Product Safety
• EN 300 328 - Technical requirements for 2.4 GHz radio equipment
• EN 301 489-1 / EN 301 489-17 - EMC requirements for radio equipment
o
, 4a,
0560
Countries of Operation & Conditions of Use in the European
Community
This device is intended to be operated in all countries of the European Community. Requirements for indoor vs. outdoor operation, license requirements and
allowed channels of operation apply in some countries as described below:
Note: The user must use the configuration utility provided with this product to
ensure the channels of operation are in conformance with the spectrum
usage rules for European Community countries as described below.
• This device requires that the user or installer properly enter the current country
of operation in the command line interface as described in the user guide, before
operating this device.
• This device will automatically limit the allowable channels determined by the
current country of operation. Incorrectly entering the country of operation may
result in illegal operation and may cause harmful interference to other system.
The user is obligated to ensure the device is operating according to the channel
limitations, indoor/outdoor restrictions and license requirements for each
European Community country as described in this document.
• This device may be operated indoors or outdoors in all countries of the European
Community using the 2.4 GHz band: Channels 1 - 13, except where noted
below.
- In Italy the end-user must apply for a license from the national spectrum
authority to operate this device outdoors.
- In Belgium outdoor operation is only permitted using the 2.46 - 2.4835 GHz
band: Channel 13.
- In France outdoor operation is only permitted using the 2.4 - 2.454 GHz band:
Channels 1 - 7.
v
COMPLIANCES
Safety Compliance
Power Cord Safety
Please read the following safety information carefully before installing the switch:
WARNING: Installation and removal of the unit must be carried out by qualified
personnel only.
• The unit must be connected to an earthed (grounded) outlet to comply with
international safety standards.
• Do not connect the unit to an A.C. outlet (power supply) without an earth
(ground) connection.
• The appliance coupler (the connector to the unit and not the wall plug) must
have a configuration for mating with an EN 60320/IEC 320 appliance inlet.
• The socket outlet must be near to the unit and easily accessible. You can only
remove power from the unit by disconnecting the power cord from the outlet.
• This unit operates under SELV (Safety Extra Low Voltage) conditions according
to IEC 60950. The conditions are only maintained if the equipment to which it is
connected also operates under SELV conditions.
France and Peru only
This unit cannot be powered from IT
unit must be powered by 230 V (2P+T) via an isolation transformer ratio 1:1, with
the secondary connection point labelled Neutral, connected directly to earth
(ground).
†
Impédance à la terre
Important! Before making connections, make sure you have the correct cord set.
Check it (read the label on the cable) against the following:
†
supplies. If your supplies are of IT type, this
vi
Power Cord Set
U.S.A. and
Canada
DenmarkThe supply plug must comply with Section 107-2-D1,
The cord set must be UL-approved and CSA certified.
The minimum specifications for the flexible cord are:
- No. 18 AWG - not longer than 2 meters, or 16 AWG.
- Type SV or SJ
- 3-conductor
The cord set must have a rated current capacity of at least
10 A
The attachment plug must be an earth-grounding type with
NEMA 5-15P (15 A, 125 V) or NEMA 6-15P (15 A, 250 V)
configuration.
Standard DK2-1a or DK2-5a.
C
OMPLIANCES
Power Cord Set
SwitzerlandThe supply plug must comply with SEV/ASE 1011.
U.K.The supply plug must comply with BS1363 (3-pin 13 A) and
EuropeThe supply plug must comply with CEE7/7 (“SCHUKO”).
be fitted with a 5 A fuse which complies with BS1362.
The mains cord must be <HAR> or <BASEC> marked and
be of type HO3VVF3GO.75 (minimum).
The mains cord must be <HAR> or <BASEC> marked and
be of type HO3VVF3GO.75 (minimum).
IEC-320 receptacle.
vii
COMPLIANCES
Veuillez lire à fond l'information de la sécurité suivante avant
d'installer le Switch:
AVERTISSEMENT: L’installation et la dépose de ce groupe doivent être confiés à un
personnel qualifié.
• Ne branchez pas votre appareil sur une prise secteur (alimentation électrique)
lorsqu'il n'y a pas de connexion de mise à la terre (mise à la masse).
• Vous devez raccorder ce groupe à une sortie mise à la terre (mise à la masse) afin
de respecter les normes internationales de sécurité.
• Le coupleur d’appareil (le connecteur du groupe et non pas la prise murale) doit
respecter une configuration qui permet un branchement sur une entrée d’appareil
EN 60320/IEC 320.
• La prise secteur doit se trouver à proximité de l’appareil et son accès doit être
facile. Vous ne pouvez mettre l’appareil hors circuit qu’en débranchant son cordon
électrique au niveau de cette prise.
• L’appareil fonctionne à une tension extrêmement basse de sécurité qui est
conforme à la norme IEC 60950. Ces conditions ne sont maintenues que si
l’équipement auquel il est raccordé fonctionne dans les mêmes conditions.
France et Pérou uniquement:
Ce groupe ne peut pas être alimenté par un dispositif à impédance à la terre. Si vos
alimentations sont du type impédance à la terre, ce groupe doit être alimenté par
une tension de 230 V (2 P+T) par le biais d’un transformateur d’isolement à rapport
1:1, avec un point secondaire de connexion portant l’appellation Neutre et avec
raccordement direct à la terre (masse).
Cordon électrique - Il doit être agréé dans le pays d’utilisation
Etats-Unis et
Canada:
Danemark:La prise mâle d’alimentation doit respecter la section 107-2 D1 de la
Le cordon doit avoir reçu l’homologation des UL et un certificat de la CSA.
Les spe'cifications minimales pour un cable flexible sont AWG No. 18,
ouAWG No. 16 pour un cable de longueur infe'rieure a` 2 me'tres.
- type SV ou SJ
- 3 conducteurs
Le cordon doit être en mesure d’acheminer un courant nominal d’au moins
10 A.
La prise femelle de branchement doit être du type à mise à la terre (mise
à la masse) et respecter la configuration NEMA 5-15P (15 A, 125 V) ou
NEMA 6-15P (15 A, 250 V).
norme DK2 1a ou DK2 5a.
viii
C
OMPLIANCES
Cordon électrique - Il doit être agréé dans le pays d’utilisation
Suisse:La prise mâle d’alimentation doit respecter la norme SEV/ASE 1011.
EuropeLa prise secteur doit être conforme aux normes CEE 7/7 (“SCHUKO”)
LE cordon secteur doit porter la mention <HAR> ou <BASEC> et doit être
de type HO3VVF3GO.75 (minimum).
Bitte unbedingt vor dem Einbauen des Switches die folgenden
Sicherheitsanweisungen durchlesen (Germany):
WARNUNG: Die Installation und der Ausbau des Geräts darf nur durch
Fachpersonal erfolgen.
• Das Gerät sollte nicht an eine ungeerdete Wechselstromsteckdose
angeschlossen werden.
• Das Gerät muß an eine geerdete Steckdose angeschlossen werden, welche die
internationalen Sicherheitsnormen erfüllt.
• Der Gerätestecker (der Anschluß an das Gerät, nicht der
Wandsteckdosenstecker) muß einen gemäß EN 60320/IEC 320 konfigurierten
Geräteeingang haben.
• Die Netzsteckdose muß in der Nähe des Geräts und leicht zugänglich sein. Die
Stromversorgung des Geräts kann nur durch Herausziehen des
Gerätenetzkabels aus der Netzsteckdose unterbrochen werden.
• Der Betrieb dieses Geräts erfolgt unter den SELV-Bedingungen
(Sicherheitskleinstspannung) gemäß IEC 60950. Diese Bedingungen sind nur
ix
COMPLIANCES
gegeben, wenn auch die an das Gerät angeschlossenen Geräte unter
•
SELV-Bedingungen betrieben werden.
Stromkabel. Dies muss von dem Land, in dem es benutzt wird geprüft werden:
U.S.A und
Canada
DanemarkDieser Stromstecker muß die ebene 107-2-D1, der
SchweizDieser Stromstecker muß die SEV/ASE
EuropeDas Netzkabel muß vom Typ HO3VVF3GO.75
Der Cord muß das UL gepruft und war das CSA
beglaubigt.
Das Minimum spezifikation fur der Cord sind:
- Nu. 18 AWG - nicht mehr als 2 meter, oder 16 AWG.
- Der typ SV oder SJ
- 3-Leiter
Der Cord muß haben eine strombelastbarkeit aus
wenigstens 10 A
Dieser Stromstecker muß hat einer erdschluss mit der typ
NEMA 5-15P (15A, 125V) oder NEMA 6-15P (15A, 250V)
konfiguration.
standard DK2-1a oder DK2-5a Bestimmungen einhalten.
1011Bestimmungen einhalten.
(Mindestanforderung) sein und die Aufschrift <HAR> oder
<BASEC> tragen.
Der Netzstecker muß die Norm CEE 7/7 erfüllen
(”SCHUKO”).
SMC’s EliteConnect 2.4GHz 802.11g Wireless Access Point
(SMC2552W-G) is an IEEE 802.11b/g access point that provides
transparent, wireless high-speed data communications between
the wired LAN and fixed, portable or mobile devices equipped
with a 802.11b, or 802.11g wireless adapter.
This solution offers fast, reliable wireless connectivity with
considerable cost savings over wired LANs (which include
long-term maintenance overhead for cabling). Using 802.11b and
802.11g technology, this access point can easily replace a
10 Mbps Ethernet connection or seamlessly integrate into a
10/100 Mbps Ethernet LAN.
In addition, the access point offers full network management
capabilities through an easy to configure web interface, a
command line interface for initial configuration and
troubleshooting, and support for Simple Network Management
tools, such as SMC’s EliteView.
Radio Characteristics – The IEEE 802.11g standard uses a
radio modulation technique known as Orthogonal Frequency
Division Multiplexing (OFDM), and a shared collision domain
(CSMA/CA). It operates at 2.4 GHz for connections to 802.11g
clients.
IEEE 802.11g includes backward compatibility with the IEEE
802.11b standard. IEEE 802.11b also operates at 2.4 GHz, but
uses Direct Sequence Spread Spectrum (DSSS) modulation
technology to achieve a communication rate of up to 11 Mbps.
1-1
Introduction
Package Checklist
The EliteConnect 2.4GHz 802.11g Wireless Access Point
package includes:
•One 2.4GHz 802.11g Wireless Access Point (SMC2552W-G)
•One Category 5 network cable
•One RS-232 console cable
•One AC power adapter and power cord
•One mounting bracket
•Four rubber feet
•Three wall-mount screws
•One Documentation CD
•This User Guide
Inform your dealer if there are any incorrect, missing or damaged
parts. If possible, retain the carton, including the original packing
materials. Use them again to repack the product in case there is a
need to return it.
Please register this product and upgrade the product warranty at
www.smc.com
1-2
Hardware Description
Front Panel
Rear Panel
Antennas
Hardware Description
LED
Indicator
Security Slot
Console
Port
RJ-45 Port,
PoE Connector
Reset
Button
3.3V/4A
Power Socket
1-3
Introduction
Component Description
Antennas
The access point includes two antennas for wireless
communications. The signal transmitted from both antennas is
identical, but only the best signal received on one of the antennas
is used. The antennas transmit the outgoing signal as a toroidal
sphere, so the antennas should be adjusted to different angles to
provide better coverage. For further information, see “Positioning
the Antennas” on page 2-3.
LED Indicators
The access point includes
three status LED indicators,
as described in the following
figure and table.
LEDStatusDescription
PWROffNo power.
On GreenPower on and ready for operation.
Power
LAN
Ethernet
Link/Activity
WLAN
802.11g
Wireless
Link/Activity
1-4
On AmberH/W error or system error.
Blinking
Green (Slow)
Indicates one of the following:
• running the power-on self-test
• loading new software
LANOffIndicates no valid Ethernet cable link on
the RJ-45 port, or that the port has been
administratively disabled
On/Flashing
Green
On/Flashing
Amber
Indicates a valid 100 Mbps link on the
RJ-45 port. Flashing indicates activity.
Indicates a valid 10 Mbps link on the
RJ-45 port. Flashing indicates activity.
LEDStatusDescription
Hardware Description
WLANOffIndicates the 802.11b/g radio is
On GreenThe access point is associated with
Blinking
Green
administratively disabled.
wireless clients, but there is no network
activity.
Indicates that the access point is
transmitting or receiving data through
wireless links.
Security Slot
The access point includes a Kensington security slot on the rear
panel. You can prevent unauthorized removal of the access point
by wrapping the Kensington security cable (not provided) around
an unmovable object, inserting the lock into the slot, and turning
the key.
Console Port
This port is used to connect a console device to the access point
through a serial cable. This connection is described under
“Console Port Pin Assignments” on page B-4. The console device
can be a PC or workstation running a VT-100 terminal emulator,
or a VT-100 terminal.
Ethernet Port
The access point has one 10BASE-T/100BASE-TX RJ-45 port
that can be attached directly to 10BASE-T/100BASE-TX LAN
segments. These segments must conform to the IEEE 802.3 or
802.3u specifications.
This port uses an MDI (i.e., internal straight-through) pin
configuration. You can therefore use straight-through twisted-pair
cable to connect this port to most network interconnection
devices such as a switch or router that provide MDI-X ports.
1-5
Introduction
However, when connecting the access point to a workstation or
other device that does not have MDI-X ports, you must use
crossover twisted-pair cable.
The access point appears as an Ethernet node and performs a
bridging function by moving packets from the wired LAN to
remote workstations on the wireless infrastructure.
Note: The RJ-45 port also supports Power over Ethernet (PoE) based
on the IEEE 802.3af standard. Refer to the description for the
“Power Connector” for information on supplying power to the
access point’s network port from a network device, such as a
switch, that provides Power over Ethernet (PoE).
Reset Button
This button is used to reset the access point or restore the factory
default configuration. If you hold down the button for less than 5
seconds, the access point will perform a hardware reset. If you
hold down the button for 5 seconds or more, any configuration
changes you may have made are removed, and the factory
default configuration is restored to the access point.
Power Connector
The access point does not have a power switch. It is powered on
when connected to the AC power adapter, and the power adapter
is connected to a power source. The access point automatically
adjusts to any voltage between 100-240 volts at 50 or 60 Hz. No
voltage range settings are required.
The access point may also receive Power over Ethernet (PoE)
from a switch or other network device that supplies power over
the network cable based on the IEEE 802.3af standard.
Note that if the access point is connected to a PoE source device
and also connected to a local power source through the AC
power adapter, PoE will be disabled.
1-6
Features and Benefits
Features and Benefits
•Local network connection via 10/100 Mbps Ethernet ports or
54 Mbps wireless interface (supporting up to 64 mobile users)
•IEEE 802.11b, 802.11g and 802.3af compliant
•Antennas with SMA connectors for optional external 2.4 GHz
high-gain antenna to extend range and coverage
•Flexible network management through Command Line
Interface (CLI), Web-based, Telnet, TFTP and SNMP, make it
simple and easy to monitor, troubleshoot and remotely
manage the network
•Power over Ethernet support reduces access point installation
costs and provides centralised power management.
•Advanced security through 64/128/152-bit Wired Equivalent
Privacy (WEP) encryption, IEEE 802.1x port authentication,
Wi-Fi Protected Access (WPA), SSID broadcast disable,
remote authentication via RADIUS server, and MAC address
filtering features to protect your sensitive data and
authenticate only authorized users to your network
•Provides seamless roaming within the WLAN service area
•Scans all available channels and selects the best channel for
each client based on the signal-to-noise ratio
1-7
Introduction
Applications
The Wireless products offer a high speed, reliable, cost-effective
solution for 10/100 Mbps wireless Ethernet client access to the
network in applications such as:
•Remote access to corporate network information
E-mail, file transfer, and terminal emulation.
•Difficult-to-wire environments
Historical or old buildings, asbestos installations, and open
areas where wiring is difficult to employ.
•Frequently changing environments
Retailers, manufacturers, and banks that frequently
rearrange the workplace or change location.
•Temporary LANs for special projects or peak times
Trade shows, exhibitions and construction sites which need
temporary setup for a short time period. Retailers, airline and
shipping companies that need additional workstations for a
peak period. Auditors who require workgroups at customer
sites.
•Access to databases for mobile workers
Doctors, nurses, retailers, or white-collar workers who need
access to databases while being mobile in a hospital, retail
store, or an office campus.
1-8
System Defaults
System Defaults
The following table lists some of the access point’s basic system
defaults. To reset the access point defaults, use the CLI
command “reset configuration” from the Exec level prompt.
FeatureParameterDefault
IdentificationSystem NameEnterprise AP
Administration User Nameadmin
Passwordsmcadmin
GeneralHTTP ServerEnabled
HTTP Server Port80
TCP/IPDHCPEnabled
IP Address192.168.2.2
Subnet Mask255.255.255.0
Default Gateway0.0.0.0
Primary DNS IP0.0.0.0
Secondary DNS IP0.0.0.0
RADIUS
(Primary and
Secondary)
IP Address0.0.0.0
Port1812
KeyDEFAULT
Timeout5 seconds
Retransmit attempts3
SyslogDisabled
Logging HostDisabled
Logging ConsoleDisabled
IP Address / Host
Name
Logging LevelInformational
Logging Facility Type 16
Speed and DuplexAuto
IAPPEnabled
SSIDSMC
StatusEnabled
Auto Channel SelectEnabled
SSID BroadcastDisabled
Transmit PowerFull
Maximum Data Rate54 Mbps
Beacon Interval100 TUs
Data Beacon Rate
1. Select a Site – Choose a proper place for the access point. In
general, the best location is at the center of your wireless
coverage area, within line of sight of all wireless devices. Try
to place the access point in a position that can best cover its
Basic Service Set (refer to “Infrastructure Wireless LAN” on
page 3-3). Normally, the higher you place the access point,
the better the performance.
2. Mount the Access Point – The access point can be mounted
on any horizontal surface or wall. You can mount the access
point on a wall as shown in the illustrations on the next page.
Mounting on a horizontal surface – To keep the access
point from sliding on the surface, attach the four rubber feet
provided in the accessory kit to the embossed circles on the
bottom of the access point.
Mounting on a wall – The access point should be mounted
only to a wall or wood surface that is at least 1/2-inch plywood
or its equivalent.
Position the mounting bracket on the wall, and mark the holes.
The orientation shown in the following figure is the most
secure position for mounting the access point. Do not mount
the access point with the retaining latches pointing down.
To mount the access point on a plastered brick or concrete
wall, first drill four holes 22 mm deep and 3.5 mm in diameter,
and press the four included wall plugs firmly into the drilled
holes until they are flush with the surface of the wall.
2-1
Hardware Installation
Set the four 5/8-inch number 12 wood screws in the holes,
leaving about 3 mm clearence from the wall.
Position the mounting bracket over the wall screws, slide the
bracket onto the screws, and then tighten down the screws.
3. Attaching the Bracket – Line up the three mounting points
on the bracket with the three mounting slots on the rear of the
access point, as directed in the figure on the next page.
Place the mounting points of the bracket into the mounting
slots of the access point and while pushing down on the
bracket, slide it into position so that the two retaining latches
slip into place over the back of the access point.
2-2
Attaching the Mounting Bracket
Back of Access Point
Mounting
slots
Hardware Installation
Mounting
points
Bracket
4. Lock the Access Point in Place – To prevent unauthorized
removal of the access point, you can use a Kensington Slim
MicroSaver security cable (not included) to attach the access
point to a fixed object.
2-3
Hardware Installation
5. Connect the Power Cord – Connect the power adapter to
the access point, and the power cord to an AC power outlet.
Otherwise, the access point can derive its operating power
directly from the RJ-45 port when connected to a device that
provides IEEE 802.3af compliant Power over Ethernet (PoE).
Note: If the access point is connected to both a PoE source device
and an AC power source, PoE will be disabled.
Warning: Use ONLY the power adapter supplied with this access
point. Otherwise, the product may be damaged.
6. Observe the Self Test – When you power on the access
point, verify that the PWR indicator stops flashing and
remains on, and that the other indicators start functioning as
described under “LED Indicators” on page 1-4.
If the PWR LED does not stop flashing, the self test has not
completed correctly. Refer to “Troubleshooting” on page A-1.
7. Connect the Ethernet Cable – The access point can be
wired to a 10/100 Mbps Ethernet through a network device
such as a hub or a switch. Connect your network to the RJ-45
port on the back panel with category 3, 4, or 5 UTP Ethernet
cable. When the access point and the connected device are
powered on, the LAN LED should light indicating a valid
network connection.
Note: The RJ-45 port on the access point uses an MDI pin
configuration, so you must use straight-through cable for
network connections to hubs or switches that only have
MDI-X ports, and crossover cable for network connections to
PCs, servers or other end nodes that only have MDI ports.
However, if the device to which you are connecting supports
auto-MDI/MDI-X operation, you can use either
straight-through or crossover cable.
8. Position the Antennas – The antennas emit signals along a
toroidal plane, and thus provide more effective coverage
when positioned along different axes. For example, you might
2-4
Hardware Installation
position the antennas around 45 to 90 degrees from each
other.
The access point also compares the strength of an incoming
signal on both antennas, and uses the antenna receiving the
stronger signal to communicate with a wireless client.
9. Connect the Console Port – Connect the console cable
(included) to the RS-232 console port for accessing the
command-line interface. You can manage the access point
using the console port (Chapter 6), the web interface
(Chapter 5), or SNMP management software such as SMC’s
EliteView.
2-5
Hardware Installation
2-6
Chapter 3
Network Configuration
The wireless solution supports a stand-alone wireless network
configuration as well as an integrated configuration with
10/100 Mbps Ethernet LANs.
Wireless network cards, adapters, and access points can be
configured as:
•Ad hoc for departmental, or enterprise LANs
•Infrastructure for wireless LANs
•Infrastructure wireless LAN for roaming wireless PCs
The 802.11b and 802.11g frequency band which operates at
2.4 GHz can easily encounter interference from other 2.4 GHz
devices, such as other 802.11b or g wireless devices, cordless
phones and microwave ovens. If you experience poor wireless
LAN performance, try the following measures:
•Limit any possible sources of radio interference within the
service area
•Increase the distance between neighboring access points
•Decrease the signal strength of neighboring access points
•Increase the channel separation of neighboring access points
(e.g., up to 3 channels of separation for 802.11b or up to 5
channels for 802.11g)
3-1
Network Configuration
Network Topologies
Ad Hoc Wireless LAN (no AP or Bridge)
An ad hoc wireless LAN consists of a group of computers, each
equipped with a wireless adapter, connected via radio signals as
an independent wireless LAN. Computers in a specific ad hoc
wireless LAN must therefore be configured to the same radio
channel.
Ad Hoc Wireless LAN
Notebook with
Wireless USB Adapter
Notebook with
Wireless PC Card
PC with Wireless
PCI Adapter
3-2
Network Topologies
Infrastructure Wireless LAN
The access point also provides access to a wired LAN for
wireless workstations. An integrated wired/wireless LAN is called
an Infrastructure configuration. A Basic Service Set (BSS)
consists of a group of wireless PC users, and an access point
that is directly connected to the wired LAN. Each wireless PC in
this BSS can talk to any computer in its wireless group via a radio
link, or access other computers or network resources in the wired
LAN infrastructure via the access point.
The infrastructure configuration not only extends the accessibility
of wireless PCs to the wired LAN, but also increases the effective
wireless transmission range for wireless PCs by passing their
signal through one or more access points.
A wireless infrastructure can be used for access to a central
database, or for connection between mobile workers, as shown in
the following figure.
Wired LAN Extension
to Wireless Adapters
File
Server
Desktop PC
Switch
Notebook with Wireless
PC Card Adapter
Access Point
PC with Wireless
PCI Adapter
3-3
Network Configuration
Infrastructure Wireless LAN for Roaming Wireless PCs
The Basic Service Set (BSS) defines the communications domain
for each access point and its associated wireless clients. The
BSS ID is a 48-bit binary number based on the access point’s
wireless MAC address, and is set automatically and transparently
as clients associate with the access point. The BSS ID is used in
frames sent between the access point and its clients to identify
traffic in the service area.
The BSS ID is only set by the access point, never by its clients.
The clients only need to set the Service Set Identifier (SSID) that
identifies the service set provided by one or more access points.
The SSID can be manually configured by the clients, can be
detected in an access point’s beacon, or can be obtained by
querying for the identity of the nearest access point. For clients
that do not need to roam, set the SSID for the wireless card to
that used by the access point to which you want to connect.
3-4
Network Topologies
A wireless infrastructure can also support roaming for mobile
workers. More than one access point can be configured to create
an Extended Service Set (ESS). By placing the access points so
that a continuous coverage area is created, wireless users within
this ESS can roam freely. All SMC wireless network cards and
adapters and SMC2552W-G wireless access points within a
specific ESS must be configured with the same SSID.
File
Server
Desktop PC
Switch
Notebook with Wireless
PC Card Adapter
Switch
PC with Wireless
PCI Adapter
Access Point
Notebook with Wireless
PC Card Adapter
<BSS1>
Access Point
<ESS>
Seamless Roaming
<BSS2>
3-5
Network Configuration
3-6
Chapter 4
Initial Configuration
The EliteConnect 2.4GHz 802.11g Wireless Access
Point SMC2552W-G offers a variety of management options,
including a web-based interface, a direct connection to the
console port, or using SNMP software such as SMC’s EliteView.
The initial configuration steps can be made through the web
browser interface using the Setup Wizard (page 4-4). The access
point requests an IP address via DHCP by default. If no response
is received from a DHCP server, then the access point uses the
default address 192.168.2.2. You can also use the command line
interface (CLI) as described below to configure a valid address.
Note: Units sold in countries outside the United States are not
configured with a specific country code. You must use the CLI to
set the country code and enable wireless operation (page 4-4).
Initial Setup through the CLI
Required Connections
The SMC2552W-G provides an RS-232 serial port that enables a
connection to a PC or terminal for monitoring and configuration.
Attach a VT100-compatible terminal, or a PC running a terminal
emulation program to the access point. You can use the console
cable provided with this package, or use a null-modem cable that
complies with the wiring assignments shown on page B-4.
4-1
Initial Configuration
To connect to the console port, complete the following steps:
1. Connect the console cable to the serial port on a terminal, or
a PC running terminal emulation software, and tighten the
captive retaining screws on the DB-9 connector.
2. Connect the other end of the cable to the RS-232 serial port
on the access point.
3. Make sure the terminal emulation software is set as follows:
• Select the appropriate serial port (COM port 1 or 2).
• Set the data rate to 9600 baud.
• Set the data format to 8 data bits, 1 stop bit, and no parity.
• Set flow control to none.
• Set the emulation mode to VT100.
• When using HyperTerminal, select Terminal keys, not
Windows keys.
Note: When using HyperTerminal with Microsoft® Windows® 2000,
make sure that you have Windows 2000 Service Pack 2 or
later installed. Windows 2000 Service Pack 2 fixes the
problem of arrow keys not functioning in HyperTerminal’s
VT100 emulation. See www.microsoft.com for information on
Windows 2000 service packs.
4. Once you have set up the terminal correctly, press the [Enter]
key to initiate the console connection. The console login
screen will be displayed.
For a description of how to use the CLI, see “Using the Command
Line Interface” on page 6-1. For a list of all the CLI commands
and detailed information on using the CLI, refer to “Command
Groups” on page 6-10.
4-2
Initial Setup through the CLI
Initial Configuration Steps
Logging In – Enter “admin” for the user name. The default
password is “smcadmin”. The CLI prompt appears displaying
“SMC Enterprise AP#.”
Setting the IP Address – By default, the access point is
configured to obtain IP address settings from a DHCP server. You
may also use the command line interface (CLI) to assign an IP
address that is compatible with your network.
Type “configure” to enter configuration mode, then type “interface
ethernet” to access the Ethernet interface-configuration mode.
First type “no dhcp” to disable DHCP client mode. Then type “ip
address ip-address netmask gateway,” where “ip-address” is the
access point’s IP address, “netmask” is the network mask for the
network, and “gateway” is the default gateway router. Check with
your system administrator to obtain an IP address that is
compatible with your network.
After configuring the access point’s IP parameters, you can
access the management interface from anywhere within the
attached network. The command line interface can also be
4-3
Initial Configuration
accessed using Telnet from any computer attached to the
network.
Setting the Country Code – Units sold in the United States are
configured by default to use only radio channels 1-11 as defined
by FCC regulations. Units sold in other countries are configured
by default without a country code (i.e., 99). You must use the CLI
to set the country code. Setting the country code restricts
operation of the access point to the radio channels permitted for
wireless networks in the specified country.
Type “exit” to leave configuration mode. Then type “country?” to
display the list of countries. Select the code for your country, and
enter the country command again, following by your country code
(e.g., IE for Ireland).
SMC Enterprise AP#country ie
SMC Enterprise AP#
Using Web-based Management
Setup Wizard
There are only a few basic steps you need to complete to connect
the SMC2552W-G to your corporate network, and provide
network access to wireless clients. The Setup Wizard takes you
through configuration procedures for the wireless Service Set
Identifier, the radio channel selection and IP configuration.
The SMC2552W-G can be managed by any computer using a
web browser (Internet Explorer 5.0 or above, or Netscape
Navigator 6.2 or above). Enter your configured IP address or the
default IP address: http://192.168.2.2
4-4
Using Web-based Management
Logging In – Enter the username “admin,” the password
“smcadmin,” and click LOGIN. For information on configuring a
user name and password, refer to page 5-28.
The home page displays the Main Menu.
4-5
Initial Configuration
Launching the Setup Wizard – To perform initial configuration,
click Setup Wizard on the home page, then click on the [Next]
button to start the process.
1. Service Set ID – Enter the service set identifier in the SSID
box which all wireless clients must use to associate with the
access point. The SSID is case sensitive and can consist of
up to 32 alphanumeric characters.
(Default: SMC)
4-6
Using Web-based Management
2. Radio Channel – You must enable radio communications for
802.11b and 802.11b/g, and set the operating radio channel.
Auto Channel Select – Select Enable for automatic radio
channel detection. (Default: Enable)
802.11g Radio Channel: Set the operating radio
channel number. (Range: 1-11)
Note: Available channel settings are limited by local
regulations which determine which channels are
available. (See “Maximum Channels” on page C-1.)
4-7
Initial Configuration
3. IP Configuration – Either enable or disable (Dynamic Host
Configuration Protocol (DHCP) for automatic IP configuration.
If you disable DHCP, then manually enter the IP address and
subnet mask. If a management station exists on another
network segment, then you must enter the IP address for a
gateway that can route traffic between these segments. Then
enter the IP address for the primary and secondary Domain
Name Servers (DNS) servers to be used for host-name to IP
address resolution.
4-8
DHCP Client – With DHCP Client enabled, the IP address,
subnet mask and default gateway can be dynamically
assigned to the access point by the network DHCP server.
(Default: Enable)
Note: If there is no DHCP server on your network, then the access
point will automatically start up with its default IP address,
192.168.2.2.
Using Web-based Management
4. Click Finish.
5. Click the OK button to restart the access point.
4-9
Initial Configuration
4-10
Chapter 5
System Configuration
Before continuing with advanced configuration, first complete the
initial configuration steps described in Chapter 4 to set up an IP
address for the SMC2552W-G.
The SMC2552W-G can be managed by any computer using a
web browser (Internet Explorer 5.0 or above, or Netscape
Navigator 6.2 or above). The SMC2552W-G Access Point is
DHCP enabled by default.
To log into the SMC2552W-G, enter the default user name
“admin” and password “smcadmin.” When the home page
displays, click on Advanced Setup. The following page will
display.
5-1
System Configuration
The information in this chapter is organized to reflect the structure
of the web screens for easy reference. However, we recommend
that you configure a user name and password as the first step
under advanced configuration to control management access to
this device (page 5-28).
Advanced Configuration
The Advanced Configuration pages include the following options.
MenuDescriptionPage
SystemConfigures basic administrative and client
IdentificationSpecifies the host name and Service Set
TCP / IP Settings Configures the IP address, subnet mask,
RadiusConfigures the RADIUS server for wireless
AuthenticationConfigures 802.1x client authentication, with
Filter Control Filters communications between wireless
SNMPControls access to this access point from
AdministrationConfigures user name and password for
System LogControls logging of error messages; sets the
access
Identifier (SSID)
gateway, and domain name servers
client authentication
an option for MAC address authentication
clients, access to the management interface
from wireless clients, and traffic matching
specific Ethernet protocol types
management stations using SNMP, as well
as the hosts that will receive trap messages
management
from local file, FTP or TFTP server;
configuration settings to factory defaults;
and resets the access point
system clock via SNTP server or manual
configuration
access; upgrades software
resets
5-4
5-4
5-6
5-9
5-12
5-20
5-25
5-28
5-34
5-2
Advanced Configuration
MenuDescriptionPage
802.11b/g
Interface
Radio SettingsConfigures radio signal parameters, such as
SecurityConfigures data encryption with Wired
WPAConfigures advanced encryption and
Configures the IEEE 802.11b/g interface5-40
5-41
radio channel, transmission rate, and
beacon settings
5-47
Equivalent Protection (WEP)
5-45
authentication with Wi-Fi Protected Access
(WPA)
5-3
System Configuration
System Identification
The system information parameters for the SMC2552W-G can be
left at their default settings. However, modifying these parameters
can help you to more easily distinguish different devices in your
network.
You should set a Service Set Identification (SSID) to identify the
wireless network service provided by the SMC2552W-G. Only
clients with the same SSID can associate with the access point.
System Name – An alias for the access point, enabling the device
to be uniquely identified on the network. (Default: Enterprise AP;
Range: 1-22 characters)
SSID – The name of the basic service set provided by the access
point. Clients that want to connect to the network through the
access point must set their SSID to the same as that of the
access point. (Default: SMC; Range: 1-32 characters, case
sensitive)
5-4
Advanced Configuration
CLI Commands for System Identification – Enter the global
configuration mode, and use the system name command to
specify a new system name. Enter the wireless configuration
mode (11g), and use the ssid command to set the service set
identifier. Then return to the Exec mode, and use the show system command to display the changes to the system
identification settings.
System Information
===================================================
Serial Number : A324003220
System Up time : 0 days, 0 hours, 32 minutes, 51 seconds
System Name : r&d
System Location :
System Contact : Contact
System Country Code : US - UNITED STATES
MAC Address : 00-30-F1-91-91-5B
IP Address : 192.168.2.51
Subnet Mask : 255.255.255.0
Default Gateway : 192.168.2.250
VLAN State : DISABLED
Native VLAN ID : 1
IAPP State : ENABLED
DHCP Client : ENABLED
HTTP Server : ENABLED
HTTP Server Port : 80
Slot Status : Band(g)
Software Version : v2.0.22
===================================================
SMC-AP#
5-5
System Configuration
TCP / IP Settings
Configuring the SMC2552W-G with an IP address expands your
ability to manage the access point. A number of access point
features depend on IP addressing to operate.
Note: You can use the web browser interface to access IP addressing
only if the access point already has an IP address that is
reachable through your network.
By default, the SMC2552W-G will be automatically configured
with IP settings from a Dynamic Host Configuration Protocol
(DHCP) server. However, if you are not using a DHCP server to
configure IP addressing, use the CLI to manually configure the
initial IP values (page 4-3). After you have network access to the
access point, you can use the web browser interface to modify
the initial IP configuration, if needed.
Note: If there is no DHCP server on your network, or DHCP fails, the
access point will automatically start up with a default IP address of
192.168.2.2.
5-6
Advanced Configuration
DHCP Client (Enable) – Select this option to obtain the IP
settings for the access point from a DHCP (Dynamic Host
Configuration Protocol) server. The IP address, subnet mask,
default gateway, and Domain Name Server (DNS) address are
dynamically assigned to the access point by the network DHCP
server. (Default: Enable)
DHCP Client (Disable) – Select this option to manually configure
a static address for the access point.
•IP Address: The IP address of the access point. Valid IP
addresses consist of four decimal numbers, 0 to 255,
separated by periods.
•Subnet Mask: The mask that identifies the host address bits
used for routing to specific subnets.
•Default Gateway: The default gateway is the IP address of the
router for the access point, which is used if the requested
destination address is not on the local subnet.
If you have management stations, DNS, RADIUS, or other
network servers located on another subnet, type the IP
address of the default gateway router in the text field provided.
Otherwise, leave the address as all zeros (0.0.0.0).
•Primary and Secondary DNS Address: The IP address of
Domain Name Servers on the network. A DNS maps
numerical IP addresses to domain names and can be used to
identify network hosts by familiar names instead of the IP
addresses.
If you have one or more DNS servers located on the local
network, type the IP addresses in the text fields provided.
Otherwise, leave the addresses as all zeros (0.0.0.0).
5-7
System Configuration
CLI Commands for TCP/IP Settings – From the global
configuration mode, enter the interface configuration mode with
the interface ethernet command. Use the ip dhcp command to
enable the DHCP client, or no ip dhcp to disable it. To manually
configure an address, specify the new IP address, subnet mask,
and default gateway using the ip address command. To specify
DNS server addresses use the dns server command. Then use
the show interface ethernet command from the Exec mode to
display the current IP settings.
SMC-AP(config)#interface ethernet6-68
Enter Ethernet configuration commands, one per line.
SMC-AP(if-ethernet)#no ip dhcp6-71
SMC-AP(if-ethernet)#ip address 192.168.1.2
255.255.255.0 192.168.1.2536-69
SMC-AP(if-ethernet)#dns primary-server 192.168.1.556-68
SMC-AP(if-ethernet)#dns secondary-server 10.1.0.556-68
SMC-AP(config)#end6-12
SMC-AP#show interface ethernet6-72
Ethernet Interface Information
========================================
IP Address : 192.168.2.2
Subnet Mask : 255.255.255.0
Default Gateway : 192.168.1.253
Primary DNS : 192.168.1.55
Secondary DNS : 10.1.0.55
Admin status : Up
Operational status : Up
========================================
SMC-AP#
5-8
Advanced Configuration
Radius
Remote Authentication Dial-in User Service (RADIUS) is an
authentication protocol that uses software running on a central
server to control access to RADIUS-aware devices on the
network. An authentication server contains a database of user
credentials for each user that requires access to the network.
A primary RADIUS server must be specified for the
SMC2552W-G to implement IEEE 802.1x network access control
and Wi-Fi Protected Access (WPA) wireless security. A
secondary RADIUS server may also be specified as a backup
should the primary server fail or become inaccessible.
Note: This guide assumes that you have already configured RADIUS
server(s) to support the access point. If using WPA (PSK) mode
then no RADIUS configuration is necessary. Configuration of
RADIUS server software is beyond the scope of this guide, refer
to the documentation provided with the RADIUS server software.
5-9
System Configuration
Primary Radius Server Setup – Configure the following settings
to use RADIUS authentication on the access point.
•IP Address: Specifies the IP address or host name of the
RADIUS server.
•Port: The UDP port number used by the RADIUS server for
authentication messages. (Range: 1024-65535;
Default: 1812)
•Key: A shared text string used to encrypt messages between
the access point and the RADIUS server. Be sure that the
same text string is specified on the RADIUS server. Do not
use blank spaces in the string. (Maximum length: 255
characters)
•Timeout: Number of seconds the access point waits for a reply
from the RADIUS server before resending a request.
(Range: 1-60 seconds; Default: 5)
•Retransmit attempts: The number of times the access point
tries to resend a request to the RADIUS server before
authentication fails. (Range: 1-30; Default: 3)
Note: For the Timeout and Retransmit attempts fields, accept the
default values unless you experience problems connecting to the
RADIUS server over the network.
Secondary Radius Server Setup – Configure a secondary
RADIUS server to provide a backup in case the primary server
fails. The access point uses the secondary server if the primary
server fails or becomes inaccessible. Once the access point
switches over to the secondary server, it periodically attempts to
establish communication again with primary server. If
communication with the primary server is re-established, the
secondary server reverts to a backup role.
5-10
Advanced Configuration
CLI Commands for RADIUS – From the global configuration
mode, use the radius-server address command to specify the
address of the primary or secondary RADIUS servers. (The
following example configures the settings for the primary RADIUS
server.) Configure the other parameters for the RADIUS server.
Then use the show show radius command from the Exec mode
to display the current settings for the primary and secondary
RADIUS servers.
Radius Server Information
========================================
IP : 192.168.1.25
Port : 181
Key : *****
Retransmit : 5
Timeout : 10
========================================
Radius Secondary Server Information
========================================
IP : 0.0.0.0
Port : 1812
Key : *****
Retransmit : 3
Timeout : 5
========================================
SMC-AP#
5-11
System Configuration
Authentication
Wireless clients can be authenticated for network access by
checking their MAC address against the local database
configured on the access point, or by looking up their MAC
addresses on a RADIUS server. The 802.1x protocol can also be
configured to check other user credentials such as a user name
and password.
5-12
Advanced Configuration
MAC Authentication – You can configure a list of the MAC
addresses for wireless clients that are authorized to access the
network. This provides a basic level of authentication for wireless
clients attempting to gain access to the network. A database of
authorized MAC addresses can be stored locally on the
SMC2552W-G or remotely on a central RADIUS server.
(Default: Local MAC)
•Local MAC: The MAC address of the associating station is
compared against the local database stored on the access
point. The Local MAC Authentication section enables the local
database to be set up.
•Radius MAC: The MAC address of the associating station is
sent to a configured RADIUS server for authentication. When
using a RADIUS authentication server for MAC address
authentication, the server must first be configured in the
Radius window (page 5-9).
•Disable: No checks are performed on an associating station’s
MAC address.
Local MAC Authentication – Configures the local MAC
authentication database. The MAC database provides a
mechanism to take certain actions based on a wireless client’s
MAC address. The MAC list can be configured to allow or deny
network access to specific clients.
•System Default: Specifies a default action for all unknown
MAC addresses (that is, those not listed in the local MAC
database).
-Deny: Blocks access for all MAC addresses except those
listed in the local database as “allowed.”
-Allow: Permits access for all MAC addresses except
those listed in the local database as “denied.”
5-13
System Configuration
•MAC Authentication Settings: Enters specified MAC
addresses and permissions into the local MAC database.
-MAC Address: Physical address of a client. Enter six pairs
of hexadecimal digits separated by hyphens; for example,
00-90-D1-12-AB-89.
-Permission: Select Allow to permit access or Deny to
block access. If Delete is selected, the specified MAC
address entry is removed from the database.
-Update: Enters the specified MAC address and
permission setting into the local database.
•MAC Authentication Table: Displays current entries in the local
MAC database.
Note: Client station MAC authentication occurs prior to the IEEE 802.1x
authentication procedure configured for the access point.
However, a client’s MAC address provides relatively weak user
authentication, since MAC addresses can be easily captured and
used by another station to break into the network. Using 802.1x
provides more robust user authentication using user names and
passwords or digital certificates. So, although you can configure
the access point to use MAC address and 802.1x authentication
together, it is better to choose one or the other, as appropriate.
802.1x Setup – IEEE 802.1x is a standard framework for network
access control that uses a central RADIUS server for user
authentication. This control feature prevents unauthorized access
to the network by requiring an 802.1x client application to submit
user credentials for authentication. The 802.1x standard uses the
Extensible Authentication Protocol (EAP) to pass user credentials
(either digital certificates, user names and passwords, or other)
from the client to the RADIUS server. Client authentication is then
verified on the RADIUS server before the access point grants
client access to the network.
5-14
Advanced Configuration
The 802.1x EAP packets are also used to pass dynamic unicast
session keys and static broadcast keys to wireless clients.
Session keys are unique to each client and are used to encrypt
and correlate traffic passing between a specific client and the
access point. You can also enable broadcast key rotation, so the
access point provides a dynamic broadcast key and changes it at
a specified interval.
You can enable 802.1x as optionally supported or as required to
enhance the security of the wireless network.
•Disable: The access point does not support 802.1x
authentication for any wireless client. After successful
wireless association with the access point, each client is
allowed to access the network.
•Supported: The access point supports 802.1x authentication
only for clients initiating the 802.1x authentication process
(i.e., the access point does not initiate 802.1x authentication).
For clients initiating 802.1x, only those successfully
authenticated are allowed to access the network. For those
clients not initiating 802.1x, access to the network is allowed
after successful wireless association with the access point.
•Required: The access point enforces 802.1x authentication for
all associated wireless clients. If 802.1x authentication is not
initiated by a client, the access point will initiate authentication.
Only those clients successfully authenticated with 802.1x are
allowed to access the network.
When 802.1x is enabled, the broadcast and session key rotation
intervals can also be configured.
•Broadcast Key Refresh Rate: Sets the interval at which the
broadcast keys are refreshed for stations using 802.1x
dynamic keying. (Range: 0-1440 minutes; Default: 0 means
disabled)
5-15
System Configuration
•Session Key Refresh Rate: The interval at which the access
point refreshes unicast session keys for associated clients.
(Range: 0-1440 minutes; Default: 0 means disabled)
•802.1x Re-authentication Refresh Rate: The time period after
which a connected client must be re-authenticated. During the
re-authentication process of verifying the client’s credentials
on the RADIUS server, the client remains connected the
network. Only if re-authentication fails is network access
blocked. (Range: 0-65535 seconds; Default: 0 means
disabled)
5-16
Advanced Configuration
CLI Commands for Local MAC Authentication– Use the
mac-authentication server command from the global
configuration mode to enable local MAC authentication. Set the
default for MAC addresses not in the local table using the
address filter default command, then enter MAC addresses in
the local table using the address filter entry command. To
remove an entry from the table, use the address filter delete
command. To display the current settings, use the show authentication command from the Exec mode.
Authentication Information
=========================================================
MAC Authentication Server : LOCAL
MAC Auth Session Timeout Value : 300 secs
802.1x : DISABLED
Broadcast Key Refresh Rate : 5 min
Session Key Refresh Rate : 5 min
CLI Commands for RADIUS MAC Authentication – Use the
mac-authentication server command from the global
configuration mode to enable remote MAC authentication. Set the
timeout value for re-authentication using the mac-authentication session-timeout command. Be sure to also configure
connection settings for the RADIUS server (not shown in the
following example). To display the current settings, use the show authentication command from the Exec mode.
SMC-AP(config)#mac-authentication server remote6-57
SMC-AP(config)#mac-authentication session-timeout 300 6-58
SMC-AP(config)#exit
SMC-AP#show authentication6-59
Authentication Information
=========================================================
MAC Authentication Server : REMOTE
MAC Auth Session Timeout Value : 300 secs
802.1x : DISABLED
Broadcast Key Refresh Rate : 5 min
Session Key Refresh Rate : 5 min
CLI Commands for 802.1x Authentication – Use the 802.1x
supported command from the global configuration mode to
enable 802.1x authentication. Set the session and broadcast key
refresh rate, and the re-authentication timeout. To display the
current settings, use the show authentication command from
the Exec mode.
Authentication Information
=========================================================
MAC Authentication Server : REMOTE
MAC Auth Session Timeout Value : 300 secs
802.1x : SUPPORTED
Broadcast Key Refresh Rate : 5 min
Session Key Refresh Rate : 5 min
The access point can employ VLAN ID and network traffic frame
filtering to control access to network resources and increase
security.
Native VLAN ID – The VLAN ID assigned to wireless clients that
are not assigned to a specific VLAN by RADIUS server
configuration.
VLAN – Enables or disables VLAN tagging support on the
SMC2552W-G. If enabled, the access point will tag traffic passing
from wireless clients to the wired network with the VLAN ID
associated with each client on the RADIUS server. Up to 16
5-20
Advanced Configuration
VLAN IDs can be mapped to specific wireless clients, allowing
users to remain within the same VLAN as they move around a
campus site. This feature can also be used to control access to
network resources from wireless clients, thereby improving
security.
A VLAN ID (1-4095) is assigned to a client after successful
authentication using IEEE 802.1x and a central RADIUS server.
The user VLAN IDs must be configured on the RADIUS server for
each user authorized to access the network. If a user does not
have a configured VLAN ID, the access point assigns the user to
its own configured native VLAN ID.
When setting up VLAN IDs for each user on the RADIUS server,
be sure to use the RADIUS attributes and values as indicated in
the following table.
Note: The specific configuration of RADIUS server software is beyond
the scope of this guide. Refer to the documentation provided with
the RADIUS server software.
5-21
System Configuration
When VLAN filtering is enabled, the access point must also have
802.1x authentication enabled and a RADIUS server configured.
Wireless clients must also support 802.1x client software to be
assigned to a specific VLAN.
When VLAN filtering is disabled, the access point ignores the
VLAN tags on any received frames.
Local Bridge Filter – Controls wireless-to-wireless
communications between clients through the SMC2552W-G.
However, it does not affect communications between wireless
clients and the wired network.
•Disable: Allows wireless-to-wireless communications between
clients through the access point.
•Enable: Blocks wireless-to-wireless communications between
clients through the access point.
AP Management Filter – Controls management access to the
SMC2552W-G from wireless clients. Management interfaces
include the web, Telnet, or SNMP.
•Disable: Allows management access from wireless clients.
•Enable: Blocks management access from wireless clients.
Ethernet Type Filter – Controls checks on the Ethernet type of all
incoming and outgoing Ethernet packets against the protocol
filtering table.
•Disable: Access point does not filter Ethernet protocol types.
•Enable: Access point filters Ethernet protocol types based on
the configuration of protocol types in the filter table. If a
protocol has its status set to “ON,” the protocol is filtered from
the access point.
5-22
Advanced Configuration
CLI Commands for VLAN Support – From the global
configuration mode use the native-vlanid command to set the
default VLAN ID for the Ethernet interface, then enable VLANs
using the vlan enable command. When you change the access
point’s VLAN support setting, you must reboot the access point to
implement the change. To view the current VLAN settings, use
the show system command.
SMC-AP(config)#native-vlanid 36-100
SMC-AP(config)#vlan enable6-99
Reboot system now? <y/n>: y
SMC-AP#show system6-33
System Information
===================================================
Serial Number : A324003220
System Up time : 0 days, 0 hours, 32 minutes, 51
seconds
System Name : r&d
System Location :
System Contact : Contact
System Country Code : US - UNITED STATES
MAC Address : 00-30-F1-91-91-5B
IP Address : 192.168.2.2
Subnet Mask : 255.255.255.0
Default Gateway : 192.168.2.250
VLAN State : DISABLED
Native VLAN ID : 3
IAPP State : ENABLED
DHCP Client : ENABLED
HTTP Server : ENABLED
HTTP Server Port : 80
Slot Status : Band(g)
Software Version : v2.0.22
===================================================
SMC-AP#
5-23
System Configuration
CLI Commands for Bridge Filtering – Use the filter local-bridge
command from the global configuration mode to prevent
wireless-to-wireless communications through the access point.
Use the filter ap-manage command to restrict management
access from wireless clients. To configure Ethernet protocol
filtering, use the filter ethernet-type enable command to enable
filtering and the filter ethernet-type protocol command to define
the protocols that you want to filter. To remove an entry from the
table, use the address filter delete command. To display the
current settings, use the show filters command from the Exec
mode.
Protocol Filter Information
=========================================================
Local Bridge :ENABLED
AP Management :ENABLED
Ethernet Type Filter :ENABLED
You can use a network management application such as SMC’s
EliteView to manage the SMC2552W-G via the Simple Network
Management Protocol (SNMP) from a network management
station. To implement SNMP management, the SMC2552W-G
must have an IP address and subnet mask, configured either
manually or dynamically. Once an IP address has been
configured, appropriate SNMP communities and trap receivers
should be configured.
Community names are used to control management access to
SNMP stations, as well as to authorize SNMP stations to receive
trap messages from the access point. To communicate with the
access point, a management station must first submit a valid
community name for authentication. You therefore need to assign
community names to specified users or user groups and set the
access level.
5-25
System Configuration
SNMP – Enables or disables SNMP management access and
also enables the access point to send SNMP traps (notifications).
SNMP management is enabled by default.
Location – A text string that describes the system location.
(Maximum length: 20 characters)
Contact – A text string that describes the system contact.
(Maximum length: 255 characters)
Community Name (Read Only) – Defines the SNMP community
access string that has read-only access. Authorized management
stations are only able to retrieve MIB objects. (Maximum length:
23 characters, case sensitive)
Community Name (Read/Write) – Defines the SNMP community
access string that has read/write access. Authorized
management stations are able to both retrieve and modify MIB
objects. (Maximum length: 23 characters, case sensitive)
Trap Destination IP Address – Specifies the recipient of SNMP
notifications. Enter the IP address or the host name. (Host Name:
1 to 20 characters)
Trap Destination Community Name – The community string sent
with the notification operation. (Maximum length: 23 characters)
5-26
Advanced Configuration
CLI Commands for SNMP – Use the snmp-server enable
server command from the global configuration mode. To set
read/write and read-only community names, use the
snmp-server community command. Use the snmp-server
location and snmp-server contact commands to indicate the
physical location of the access point and define a system contact.
The snmp-server host command defines a trap receiver host. To
view the current SNMP settings, use the show snmp command.
SNMP Information
============================================
Service State : Enable
Community (ro) : ****
Community (rw) : *****
Location : WC-19
Contact : Paul
Traps : Enabled
Host Name/IP : 10.1.19.23
Trap Community : *****
=============================================
SMC-AP#
5-27
System Configuration
Administration
Changing the Password
Management access to the web and CLI interface on the
SMC2552W-G is controlled through a single user name and
password. You can also gain additional access security by using
control filters (see “Filter Control” on page 5-20).
To protect access to the management interface, you need to
configure an Administrator’s user name and password as soon as
possible. If the user name and password are not configured, then
anyone having access to the access point may be able to
compromise access point and network security.
Note: Pressing the Reset button on the back of the SMC2552W-G for
more than five seconds resets the user name and password to the
factory defaults. For this reason, we recommend that you protect
the access point from physical access by unauthorized persons.
Username – The name of the user. The default name is “admin.”
(Length: 3-16 characters, case sensitive.)
New Password – The password for management access.
(Length: 3-16 characters, case sensitive)
5-28
Advanced Configuration
Confirm New Password – Enter the password again for
verification.
CLI Commands for the User Name and Password – Use the
username and password commands from the CLI configuration
mode.
You can upgrade new SMC2552W-G software from a local file on
the management workstation, or from an FTP or TFTP server.
New software may be provided periodically on SMC’s web site
(http://www.smc.com).
After upgrading new software, you must reboot the
SMC2552W-G to implement the new code. Until a reboot occurs,
the SMC2552W-G will continue to run the software it was using
before the upgrade started. Also note that rebooting the access
point with new software will reset the configuration to the factory
default settings.
Before upgrading new software, verify that the SMC2552W-G is
connected to the network and has been configured with a
compatible IP address and subnet mask.
5-30
Advanced Configuration
If you need to download from an FTP or TFTP server, take the
following additional steps:
•Obtain the IP address of the FTP or TFTP server where the
access point software is stored.
•If upgrading from an FTP server, be sure that you have an
account configured on the server with a user name and
password.
•If VLANs are configured on the access point, determine the
VLAN ID with which the FTP or TFTP server is associated,
and then configure the management station with the same
VLAN ID. If you are managing the access point from a wireless
client, the VLAN ID for the the wireless client must be
configured on a RADIUS server.
Current version – Version number of runtime code.
Firmware Upgrade Local – Downloads an operation code image
file from the web management station to the access point using
HTTP. Use the Browse button to locate the image file locally on
the management station and click Start Upgrade to proceed.
•New firmware file: Specifies the name of the code file on the
server. The new firmware file name should not contain slashes
(\ or /), the leading letter of the file name should not be a period
(.), and the maximum length for file names is 32 characters for
files on the access point. (Valid characters: A-Z, a-z, 0-9, “.”,
“-”, “_”)
•Firmware Upgrade Remote – Downloads an operation code
image file from a specified remote FTP or TFTP server. After
filling in the following fields, click Start Upgrade to proceed.
•New firmware file: Specifies the name of the code file on the
server.
(\ or /),
(.), and the maximum length for file names on the FTP/TFTP
The new firmware file name should not contain slashes
the leading letter of the file name should not be a period
5-31
System Configuration
server is 255 characters or 32 characters for files on the
access point. (Valid characters: A-Z, a-z, 0-9, “.”, “-”, “_”)
•IP Address: IP address or host name of FTP or TFTP server.
•Username: The user ID used for login on an FTP server.
•Password: The password used for login on an FTP server.
Restore Factory Settings – Click the Restore button to reset the
configuration settings for the SMC2552W-G to the factory
defaults and reboot the system. Note that all user configured
information will be lost. You will have to re-enter the default user
name (admin) and password (smcadmin) to re-gain management
access to this device.
Reset Access Point – Click the Reset button to reboot the system.
Note: If you have upgraded system software, then you must reboot the
SMC2552W-G to implement the new operation code. Before
rebooting please reset the access point to the factory default and
clear the browser cache.
5-32
Advanced Configuration
CLI Commands for Downloading Software from a TFTP Server –
Use the copy tftp file command from the Exec mode and then
specify the file type, name, and IP address of the TFTP server.
When the download is complete, the dir command can be used
to check that the new file is present in the access point file
system. To run the new software, use the reset board command
to reboot the access point.
SMC-AP#copy tftp file6-42
1. Application image
2. Config file
3. Boot block image
Select the type of download<1,2,3>: [1]:1
TFTP Source file name:smc-img.bin
TFTP Server IP:192.168.1.19
SMC-AP#reset board6-14
Reboot system now? <y/n>: y
5-33
System Configuration
System Log
The SMC2552W-G can be configured to send event and error
messages to a System Log Server. The system clock can also be
synchronized with a time server, so that all the messages sent to
the Syslog server are stamped with the correct time and date.
Enabling System Logging
The SMC2552W-G supports a logging process that can control
error messages saved to memory or sent to a Syslog server. The
logged messages serve as a valuable tool for isolating access
point and network problems.
System Log Setup – Enables the logging of error messages.
Logging Host – Enables the sending of log messages to a Syslog
server host.
Server Name/IP – The IP address or name of a Syslog server.
Logging Console – Enables the logging of error messages to the
console.
5-34
Advanced Configuration
Logging Level – Sets the minimum severity level for event
logging.
The system allows you to limit the messages that are logged by
specifying a minimum severity level. The following table lists the
error message levels from the most severe (Alert) to least severe
(Debug). The message levels that are logged include the
specified minimum level up to the Alert level.
Error LevelDescription
AlertsImmediate action needed
CriticalCritical conditions (e.g., memory allocation, or free
NoticeNormal but significant condition, such as cold start
InformationalInformational messages only
DebugDebugging messages
Note: The access point error log can be viewed using the Event Logs
window in the Status section (page 5-66).The Event Logs window
displays the last 128 messages logged in chronological order,
from the newest to the oldest. Log messages saved in the access
point’s memory are erased when the device is rebooted.
return)
5-35
System Configuration
CLI Commands for System Logging – To enable logging on the
access point, use the logging on command from the global
configuration mode. The logging level command sets the
minimum level of message to log. Use the logging console
command to enable logging to the console. Use the logging host
command to specify up to four Syslog servers. The CLI also
allows the logging facility-type command to set the facility-type
number to use on the Syslog server. To view the current logging
settings, use the show logging command.
Logging Information
============================================
Syslog State : Enabled
Logging Host State : Enabled
Logging Console State : Enabled
Server Domain name/IP : 1 10.1.0.3
Logging Level : Error
Logging Facility Type : 16
=============================================
5-36
SMC-AP#
Advanced Configuration
Configuring SNTP
Simple Network Time Protocol (SNTP) allows the SMC2552W-G
to set its internal clock based on periodic updates from a time
server (SNTP or NTP). Maintaining an accurate time on the
access point enables the system log to record meaningful dates
and times for event entries. If the clock is not set, the access point
will only record the time from the factory default set at the last
bootup.
The SMC2552W-G acts as an SNTP client, periodically sending
time synchronization requests to specific time servers. You can
configure up to two time server IP addresses. The access point
will attempt to poll each server in the configured sequence.
SNTP Server – Configures the access point to operate as an
SNTP client. When enabled, at least one time server IP address
must be specified.
•Primary Server: The IP address of an SNTP or NTP time
server that the access point attempts to poll for a time update.
•Secondary Server: The IP address of a secondary SNTP or
NTP time server. The access point first attempts to update the
time from the primary server; if this fails it attempts an update
from the secondary server.
Note: The SMC2552W-G also allows you to disable SNTP and set the
system clock manually.
Set Time Zone – SNTP uses Coordinated Universal Time (or
UTC, formerly Greenwich Mean Time, or GMT) based on the time
at the Earth’s prime meridian, zero degrees longitude. To display
a time corresponding to your local time, you must indicate the
number of hours your time zone is located before (east) or after
(west) UTC.
Enable Daylight Saving – The access point provides a way to
automatically adjust the system clock for Daylight Savings Time
5-37
System Configuration
changes. To use this feature you must define the month and date
to begin and to end the change from standard time. During this
period the system clock is set back by one hour.
CLI Commands for SNTP – To enable SNTP support on the
access point, from the global configuration mode specify SNTP
server IP addresses using the sntp-server ip command, then
use the sntp-server enable command to enable the service. Use
the sntp-server timezone command to set the time zone for your
location, and the sntp-server daylight-saving command to set
daylight savings. To view the current SNTP settings, use the
show sntp command.
SMC-AP(config)#sntp-server ip 10.1.0.196-28
SMC-AP(config)#sntp-server enable6-29
SMC-AP(config)#sntp-server timezone +86-32
SMC-AP(config)#sntp-server daylight-saving6-31
Enter Daylight saving from which month<1-12>: 3
and which day<1-31>: 31
Enter Daylight saving end to which month<1-12>: 10
and which day<1-31>: 31
SMC-AP(config)#exit
SMC-AP#show sntp6-32
5-38
SNTP Information
=========================================================
Service State : Enabled
SNTP (server 1) IP : 137.92.140.80
SNTP (server 2) IP : 192.43.244.18
Current Time : 19 : 35, Jan 10th, 2004
Time Zone : +8 (TAIPEI, BEIJING)
Daylight Saving : Enabled, from Mar, 31th to Oct,
31th
=========================================================
SMC-AP#
Advanced Configuration
CLI Commands for the System Clock – The following example
shows how to manually set the system time when SNTP server
support is disabled on the access point.
SMC-AP(config)#no sntp-server enable6-29
SMC-AP(config)#sntp-server date-time6-30
Enter Year<1970-2100>: 2004
Enter Month<1-12>: 10
Enter Day<1-31>: 10
Enter Hour<0-23>: 18
Enter Min<0-59>: 35
SMC-AP(config)#
5-39
System Configuration
Radio Interface
The IEEE 802.11b and 802.11g interface includes configuration
options for radio signal characteristics and wireless security
features.
The access point can operate in three modes, IEEE 802.11b only,
802.11g only, or a mixed 802.11b/g mode. Also note that 802.11g
is backward compatible with 802.11b. The 802.11b/g interface
can be configured independently under the following web pages:
•Radio Interface : 802.11b/g
Note: The radio channel settings for the SMC2552W-G are limited by
local regulations, which determine the number of channels that
are available.
5-40
Radio Interface
Radio Settings (802.11g)
The IEEE 802.11g standard operates within the 2.4 GHz band at
up to 54 Mbps. Also note that because the IEEE 802.11g
standard is an extension of the IEEE 802.11b standard, it allows
clients with 802.11b wireless network cards to associate to an
802.11g access point.
Enable – Enables radio communications on the SMC2552W-G.
(Default: Enabled)
5-41
System Configuration
Radio Channel – The radio channel that the access point
uses to communicate with wireless clients. When multiple
access points are deployed in the same area, set the
channel on neighboring access points at least four
channels apart to avoid interference with each other. For
example, in the United States you can deploy up to four
access points in the same area (e.g., channels 1, 6, 11).
Also note that the channel for wireless clients is
automatically set to the same as that used by the access
point to which it is linked. (Range: 1-11; Default: 1)
Auto Channel Select – Enables the access point to
automatically select an unoccupied radio channel.
(Default: Enabled)
SSID Broadcast – The SSID broadcast can be disabled to
prevent access to clients without a pre-configured SSID. When
disabled, the access point will not include its SSID in beacon
messages. Nor will it respond to probe requests from clients that
do not include the correct SSID. (Default: Enabled)
Select Antenna Mode – Specifies whether the antenna used will
be automatically selected based on best signal reception (i.e.,
Diversity mode), or will be fixed to use an optional high-gain
antenna. (Default: Diversity)
Working Mode – The access point can be configured to support
both 802.11b and 802.11g clients simultaneously, 802.11b clients
only, or 802.11g clients only. (Default: 802.11b and 802.11g)
Transmit Power – Adjusts the power of the radio signals
transmitted from the access point. The higher the transmission
power, the farther the transmission range. Power selection is not
just a trade off between coverage area and maximum supported
clients. You also have to ensure that high-power signals do not
5-42
Radio Interface
interfere with the operation of other radio devices in the service
area. (Options: 100%, 50%, 25%, 12%, minimum; Default: 100%)
Maximum Station Data Rate – The maximum data rate at
which a client can connect to the access point. The
maximum transmission distance is affected by the data
rate. The lower the data rate, the longer the transmission
distance. (Options: 54, 48, 36, 24 Mbps; Default: 54
Mbps)
Beacon Interval – The rate at which beacon signals are
transmitted from the access point. The beacon signals
allow wireless clients to maintain contact with the access
point. They may also carry power-management
information. (Range: 20-1000 TUs; Default: 100 TUs)
Data Beacon Rate – The rate at which stations in sleep mode
must wake up to receive broadcast/multicast transmissions.
Known also as the Delivery Traffic Indication Map (DTIM) interval,
it indicates how often the MAC layer forwards broadcast/multicast
traffic, which is necessary to wake up stations that are using
Power Save mode. The default value of 2 indicates that the
access point will save all broadcast/multicast frames for the Basic
Service Set (BSS) and forward them after every second beacon.
Using smaller DTIM intervals delivers broadcast/multicast frames
in a more timely manner, causing stations in Power Save mode to
wake up more often and drain power faster. Using higher DTIM
values reduces the power used by stations in Power Save mode,
but delays the transmission of broadcast/multicast frames.
(Range: 1-255 beacons; Default: 2 beacons)
RTS Threshold – Sets the packet size threshold at which a
Request to Send (RTS) signal must be sent to a receiving station
prior to the sending station starting communications. The access
point sends RTS frames to a receiving station to negotiate the
5-43
System Configuration
sending of a data frame. After receiving an RTS frame, the station
sends a CTS (clear to send) frame to notify the sending station
that it can start sending data.
If the RTS threshold is set to 0, the access point never sends RTS
signals. If set to 2347, the access point always sends RTS
signals. If set to any other value, and the packet size equals or
exceeds the RTS threshold, the RTS/CTS (Request to Send /
Clear to Send) mechanism will be enabled.
The access points contending for the medium may not be aware
of each other. The RTS/CTS mechanism can solve this “Hidden
Node Problem.” (Range: 0-2347 bytes: Default: 2347 bytes)
5-44
Radio Interface
CLI Commands for the 802.11g Wireless Interface – From the
global configuration mode, enter the interface wireless g
command to access the 802.11g radio interface. Set the interface
SSID using the ssid command and, if required, configure a name
for the interface using the description command. You can also
use the no ssid-broadcast command to stop sending the SSID
in beacon messages. Select a radio channel or set selection to
Auto using the channel command. Set any other parameters as
required. To view the current 802.11g radio settings, use the
show interface wireless g command.