Cisco 1142 - Aironet Standalone AP User manual

GETTING STARTED GUIDE
Cisco Aironet 1140 Series Lightweight Access Point
1About this Guide
2Safety Instructions
3Unpacking
4Overview
5Configuring the Access Point
6Mounting the Access Point
7Deploying the Access Point on the Wireless Network
8Troubleshooting
9Declarations of Conformity and Regulatory Information
10 Configuring DHCP Option 43 and DHCP Option 60
11 Access Point Specifications

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Revised December 2010 P/N 78-18848-03
1 About this Guide
This Guide provides instructions on how to install and configure your Cisco Aironet 1140 Series
Access Point. This guide also provides mounting instructions and limited troubleshooting procedures.
2 Safety Instructions
Translated versions of the following safety warnings are provided in the translated safety warnings
document that is shipped with your access point. The translated warnings are also in the Translated
Safety Warnings for Cisco Aironet Access Points, which is available on your documentation CD and
cisco.com.
Warning IMPORTANT SAFETY INSTRUCTIONS
This warning symbol means danger. You are in a situation that could cause bodily injury.
Before you work on any equipment, be aware of the hazards involved with electrical
circuitry and be familiar with standard practices for preventing accidents. Use the
statement number provided at the end of each warning to locate its translation in the
translated safety warnings that accompanied this device.
Statement 1071
SAVE THESE INSTRUCTIONS
Warning Read the installation instructions before you connect the system to its power source.
Statement 1004
Warning This product must be connected to a Power-over-Ethernet (PoE) IEEE 802.3af compliant
power source or an IEC60950 compliant limited power source. Statement 353
Warning Installation of the equipment must comply with local and national electrical codes.
Statement 1074

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Warning This product relies on the building’s installation for short-circuit (overcurrent)
protection. Ensure that the protective device is rated not greater than:
20A. Statement 1005
Warning Do not operate your wireless network device near unshielded blasting caps or in an
explosive environment unless the device has been modified to be especially qualified for
such use. Statement 245B
Warning In order to comply with FCC radio frequency (RF) exposure limits, antennas should be
located at a minimum of 7.9 inches (20 cm) or more from the body of all persons.
Statement 332
Caution When mounting the access point to a wall or ceiling, be sure to use appropriate fasteners.
The fasteners used must be capable of maintaining a minimum pullout force of 20 lbs (9
kg) and must use all 4 indented holes on the low-profile mounting bracket.
Caution This product and all interconnected equipment must be installed indoors within the same
building, including the associated LAN connections as defined by Environment A of the
IEEE 802.af Standard.
Note The access point is suitable for use in environmental air space in accordance with section
300.22.C of the National Electrical Code and sections 2-128, 12-010(3), and 12-100 of the
Canadian Electrical Code, Part 1, C22.1. You should not install the power supply or power
injector in air handling spaces.
Note Use only with listed ITE equipment.

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3 Unpacking
Follow these steps:
Step 1 Unpack and remove the access point and the accessory kit from the shipping box.
Step 2 Return any packing material to the shipping container and save it for future use.
Step 3 Verify that you have received the items shown in Figure 1. If any item is missing or damaged,
contact your Cisco representative or reseller for instructions.
Figure 1 Shipping Box Contents
1Standard ceiling adjustable T-rail clip 31140 series access point
2Mounting bracket 46-32 x 1/4 in. (0.63 cm) flat head screws
207439
2
3
4
1

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4 Overview
The following illustrations show the access point connections and features.
Figure 2 Access Point Ports and Connections
1Kensington lock slot 4Console port
2Power connection 5Security padlock and hasp
3Ethernet port 6Low-profile mounting bracket pins (feet for
desk or table-top mount)
272377
2 3 4
1 5
6 6

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5 Configuring the Access Point
This section describes how to connect the access point to a wireless LAN controller. Because the
configuration process takes place on the controller, see the Cisco Wireless LAN Controller
Configuration Guide for additional information. This guide is available on cisco.com.
The Controller Discovery Process
The 1140 series access point uses the IETF standard Control and Provisioning of Wireless Access
Points Protocol (CAPWAP) to communicate between the controller and other wireless access points on
the network. CAPWAP is a standard, interoperable protocol which enables an access controller to
manage a collection of wireless termination points. The discovery process using CAPWAP is identical
to the Lightweight Access Point Protocol (LWAPP) used with previous Cisco Aironet access points.
LWAPP-enabled access points are compatible with CAPWAP and conversion to a CAPWAP controller
is seamless. Deployments can combine CAPWAP and LWAPP software on the controllers.
The functionality provided by the controller does not change except for customers who have Layer 2
deployments, which CAPWAP does not support.
In a CAPWAP environment, a wireless access point discovers a controller by using CAPWAP discovery
mechanisms and then sends it a CAPWAP join request. The controller sends the access point a
CAPWAP join response allowing the access point to join the controller. When the access point joins
the controller, the controller manages its configuration, firmware, control transactions, and data
transactions.
Note For additional information about the discovery process and CAPWAP, see the Cisco Wireless
LAN Controller Software Configuration Guide. This document is available on cisco.com.
Note CAPWAP support is provided in controller software release 5.2 or later. Your controller must
be running release 5.2 or later.
Note You cannot edit or query any access point using the controller CLI if the name of the access
point contains a space.
Note Make sure that the controller is set to the current time. If the controller is set to a time that
has already occurred, the access point might not join the controller because its certificate may
not be valid for that time.

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Access points must be discovered by a controller before they can become an active part of the network.
The 1140 series access point supports these controller discovery processes:
•Layer 3 CAPWAP discovery—Can occur on different subnets than the access point and uses IP
addresses and UDP packets rather than MAC addresses used by Layer 2 discovery.
•Over-the-air provisioning (OTAP)—This feature is supported by Cisco 4400 series controllers. If
this feature is enabled on the controller, all joined access points transmit wireless CAPWAP
neighbor messages, and new access points receive the controller IP address from these messages.
This feature is disabled by default and should remain disabled when all access points are installed.
Additional information about OTAP is available on cisco.com at the following link:
http://www.ciscosystems.com/en/US/products/ps6366/products_tech_note09186a008093d74a.shtml
•Locally stored controller IP address discovery—If the access point was previously joined to a
controller, the IP addresses of the primary, secondary, and tertiary controllers are stored in the
access point’s non-volatile memory. This process of storing controller IP addresses on an access
point for later deployment is called priming the access point. For more information about priming,
see the “Performing a Pre-Installation Configuration” section on page 8.
•DHCP server discovery—This feature uses DHCP option 43 to provide controller IP addresses to
the access points. Cisco switches support a DHCP server option that is typically used for this
capability. For more information about DHCP option 43, see the “Configuring DHCP Option 43
and DHCP Option 60” section on page 31.
•DNS discovery—The access point can discover controllers through your domain name server
(DNS). For the access point to do so, you must configure your DNS to return controller IP
addresses in response to CISCO-LWAPP-CONTROLLER.localdomain, where localdomain is the
access point domain name. Configuring the CISCO-LWAPP-CONTROLLER provides backwards
compatibility in an existing customer deployment. When an access point receives an IP address
and DNS information from a DHCP server, it contacts the DNS to resolve
CISCO-LWAPP-CONTROLLER.localdomain. When the DNS sends a list of controller IP
addresses, the access point sends discovery requests to the controllers.
Preparing the Access Point
Before you mount and deploy your access point, we recommend that you perform a site survey (or use
the site planning tool) to determine the best location to install your access point.
You should have the following information about your wireless network available:
•Access point locations.
•Access point mounting options: below a suspended ceiling, on a flat horizontal surface, or on a
desktop.

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Note You can mount the access point above a suspended ceiling but you must purchase
additional mounting hardware: See “Mounting the Access Point” section on page 12 for
additional information.
•Access point power options: power supplied by a DC power supply, PoE from a network device,
or a PoE power injector/hub (usually located in a wiring closet).
Note Access points mounted in a building’s environmental airspace must be powered using PoE
to comply with safety regulations.
Cisco recommends that you make a site map showing access point locations so that you can record the
device MAC addresses from each location and return them to the person who is planning or managing
your wireless network.
Installation Summary
Installing the access point involves these operations:
•Performing a pre-installation configuration (optional)
•Mounting the access point
•Grounding the access point
•Deploying the access point on the wireless network
Performing a Pre-Installation Configuration
The following procedures ensure that your access point installation and initial operation go as
expected. A pre-installation configuration is also known as priming the access point. This procedure
is optional.
Note Performing a pre-installation configuration is an optional procedure. If your network
controller is properly configured, you can install your access point in its final location and
connect it to the network from there. See the “Deploying the Access Point on the Wireless
Network” section on page 12 for details.

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Pre-Installation Configuration Setup
Figure 3 shows the pre-installation configuration setup.
Figure 3 Pre-Installation Configuration Setup
Follow these steps to perform the pre-installation configuration.
Step 1 Make sure that the Cisco wireless LAN controller DS port is connected to the network. Use
the CLI, web-browser interface, or Cisco WCS procedures as described in the appropriate
Cisco wireless LAN controller guide.
a. Make sure that access points have Layer 3 connectivity to the Cisco wireless LAN controller
Management and AP-Manager Interface.
b. Configure the switch to which your access point is to attach. See the Cisco Unified Wireless
Network WLAN Controller Guide: Cisco 440x Series WLAN Controllers for additional
information.
c. Set the Cisco wireless LAN controller as the master so that new access points always join with
it.
d. Make sure DHCP is enabled on the network. The access point must receive its IP address
through DHCP.
Controller
Layer 3
devices
Cisco Aironet
access points
272488

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e. CAPWAP UDP ports must not be blocked in the network.
f. The access point must be able to find the IP address of the controller. This can be
accomplished using DHCP, DNS, or IP subnet broadcast. This guide describes the DHCP
method to convey the controller IP address. For other methods, refer to the product
documentation. See also the “Using DHCP Option 43” section on page 14 for more
information.
Step 2 Apply power to the access point:
a. The access point is 802.3af (15.4 W) compliant and can be powered by any of the following
802.3af compliant devices:
– 2106 controller
– WS-C3550, WS-C3560, and WS-C3750 switches
– C1880 switch
– 2600, 2610, 2611, 2621, 2650, and 2651 multiservice platforms
– 2610XM, 2611XM, 2621XM, 2650XM, 2651XM, and 2691 multiservice platforms
– 2811, 2821, and 2851 integrated services routers
– 3620, 3631-telco, 3640, and 3660 multiservice platforms
– 3725 and 3745 multiservice access routers
– 3825 and 3845 integrated services routers
The access point can also be powered by any of the following optional external power
sources:
– Any 802.3af compliant power injector
Note The 1140 series access point requires a Gigibit Ethernet link to prevent the Ethernet
port from becoming a bottleneck for traffic because wireless traffic speeds exceed
transmit speeds of a 10/100 Ethernet port.
– 1250 series access point power injector (AIR-PWRINJ4)
– 1100/1200 series access point DC power supply (AIR-PWR-SPLY)
b. As the access point attempts to connect to the controller, the LEDs cycle through a green, red,
and amber sequence, which can take up to 5 minutes.
Note If the access point remains in this mode for more than five minutes, the access point is
unable to find the Master Cisco wireless LAN controller. Check the connection between
the access point and the Cisco wireless LAN controller and be sure that they are on the
same subnet.

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c. If the access point shuts down, check the power source.
d. After the access point finds the Cisco wireless LAN controller, it attempts to download the
new operating system code if the access point code version differs from the Cisco wireless
LAN controller code version. While this is happening, the Status LED blinks dark blue.
e. If the operating system download is successful, the access point reboots.
Step 3 Configure the access point if required. Use the controller CLI, controller GUI, or Cisco WCS
to customize the access-point-specific 802.11n network settings.
Step 4 If the pre-installation configuration is successful, the Status LED is green indicating normal
operation. Disconnect the access point and mount it at the location at which you intend to
deploy it on the wireless network.
Step 5 If your access point does not indicate normal operation, turn it off and repeat the
pre-installation configuration.
Note When you are installing a Layer 3 access point on a different subnet than the Cisco
wireless LAN controller, be sure that a DHCP server is reachable from the subnet on
which you will be installing the access point, and that the subnet has a route back to
the Cisco wireless LAN controller. Also be sure that the route back to the Cisco
wireless LAN controller has destination UDP ports 5246 and 5247 open for CAPWAP
communications. Ensure that the route back to the primary, secondary, and tertiary
wireless LAN controller allows IP packet fragments. Finally, be sure that if address
translation is used, that the access point and the Cisco wireless LAN controller have
a static 1-to-1 NAT to an outside address. (Port Address Translation is not
supported.)

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6 Mounting the Access Point
Cisco Aironet 3500, 1260, 1140, 1130, and 1040 series access points can be mounted in several
configurations, including on a suspended ceiling, on a hard ceiling or wall, on an elecrtical or network
box, and above a suspended ceiling. Click this URL to browse to complete access point mounting
instructions:
http://www.cisco.com/en/US/docs/wireless/access_point/mounting/guide/apmount.html
Note The integrated antenna design of the 1140 series access point is designed for horizontal
surfaces, (table top and ceiling installations). When mounted to such surfaces, the integrated
antennas produce the best antenna radiation pattern. For advanced features such as voice,
location, and rogue access point detection, ceiling mounting is strongly recommended.
However, for smaller areas such as conference rooms, kiosks, transportation, and hot-spot
usage where the customer is concerned primarily with data coverage and not advanced
features, you can mount the unit on a wall using wall anchors.
Caution Do not use plastic wall anchors or the keyhole slots on the mounting bracket for ceiling
installations. When mounting the access point on a hard ceiling, use four fasteners
capable of maintaining a minimum pullout force of 20 lbs (9 kg).
7 Deploying the Access Point on the Wireless Network
After you have mounted the access point, follow these steps to deploy it on the wireless network.
Step 1 Connect and power up the access point.
Step 2 Observe the access point LED.
a. When you power up the access point, it begins a power-up sequence that you can verify by
observing the access point LED. If the power-up sequence is successful, the discovery and join
process begins. During this process, the LED blinks sequentially through its available colors
(red, amber, and green). When the access point has joined a controller, the LED is green if no
clients are associated or blue if one or more clients are associated.
b. If the LED is not on, the access point is most likely not receiving power.

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c. If the LED blinks sequentially for more than 5 minutes, the access point is unable to find its
primary, secondary, and tertiary Cisco wireless LAN controller. Check the connection
between the access point and the Cisco wireless LAN controller, and be sure the access point
and the Cisco wireless LAN controller are either on the same subnet or that the access point
has a route back to its primary, secondary, and tertiary Cisco wireless LAN controller. Also,
if the access point is not on the same subnet as the Cisco wireless LAN controller, be sure that
there is a properly configured DHCP server on the same subnet as the access point. See the
“Configuring DHCP Option 43 and DHCP Option 60” section on page 31 for additional
information.
Step 3 Reconfigure the Cisco wireless LAN controller so that it is not the Master.
Note A Master Cisco wireless LAN controller should be used only for configuring access
points and not in a working network.
8 Troubleshooting
If you follow the instructions in previous sections of this guide, you should have no trouble getting
your access point installed and running. If you do experience difficulty, before contacting Cisco, look
for a solution to your problem in this guide or the troubleshooting chapter of the hardware installation
guide for the access point you are using. These, and other documents, are available on Cisco.com.
Follow these steps to access and download these documents:
Step 1 Open your web browser and go to http://www.cisco.com.
Step 2 Click Products & Services. A pop-up window appears.
Step 3 Click Wireless. The Wireless Introduction page appears.
Step 4 Scroll down to the Product Portfolio section.
Step 5 Under Access Points, click Cisco Aironet 1140 Series. The Cisco Aironet 1140 Series
Introduction page appears.
Step 6 Scroll down to the Support window and click Install and Upgrade. The Cisco Aironet 1140
Series Install and Upgrade page appears.
Step 7 Click Install and Upgrade Guides. The Cisco Aironet 1140 Series Install and Upgrade Guides
page appears.
Step 8 Select the section that best suits your troubleshooting needs.

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Guidelines for Using Cisco Aironet Lightweight Access Points
Keep these guidelines in mind when you use an 1140 series lightweight access point:
•The access point can only communicate with Cisco controllers, such as the 2106 series wireless
LAN controllers or 4400 series controllers.
•The access point does not support Wireless Domain Services (WDS) and cannot communicate with
WDS devices. However, the controller provides functionality equivalent to WDS when the access
point joins to it.
•CAPWAP does not support Layer 2. The access point must get an IP address and discover the
controller using Layer 3, DHCP, DNS, or IP subnet broadcast.
•The access point console port is enabled for monitoring and debug purposes (all configuration
commands are disabled when the access point is connected to a controller).
Using DHCP Option 43
You can use DHCP Option 43 to provide a list of controller IP addresses to the access points, enabling
them to find and join a controller. For additional information, refer to the “Configuring DHCP Option
43 and DHCP Option 60” section on page 31.
Checking the Access Point LED
Figure 4 shows the location of the access point Status LED.
Figure 4 Access Point LED Location
1Status LED
272378
1

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Note Regarding LED status colors, it is expected that there will be small variations in color intensity
and hue from unit to unit. This is within the normal range of the LED manufacturer’s
specifications and is not a defect.
Table 1 shows the access point Status LED indications for various conditions.
Table 1 LED Status Indications
Message
Type
Status
LED
Message
Meaning
Boot loader status
sequence
Blinking green DRAM memory test in progress
DRAM memory test OK
Board initialization in progress
Initializing FLASH file system
FLASH memory test OK
Initializing Ethernet
Ethernet OK
Starting Cisco IOS
Initialization successful
Association status Green Normal operating condition, but no wireless
client associated
Blue Normal operating condition, at least one wireless
client association
Operating status Blinking blue Software upgrade in progress
Cycling through green,
red, and amber
Discovery/join process in progress
Rapidly cycling
through blue, green,
and red
Access point location command invoked
Blinking red Ethernet link not operational

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Troubleshooting the Access Point Join Process
Access points can fail to join a controller for many reasons: a RADIUS authorization is pending;
self-signed certificates are not enabled on the controller; the access point’s and controller’s regulatory
domains don’t match, and so on.
Controller software enables you to configure the access points to send all CAPWAP-related errors to
a syslog server. You do not need to enable any debug commands on the controller because all of the
CAPWAP error messages can be viewed from the syslog server itself.
The state of the access point is not maintained on the controller until it receives a CAPWAP join
request from the access point. Therefore, it can be difficult to determine why the CAPWAP discovery
request from a certain access point was rejected. In order to troubleshoot such joining problems
Boot loader warnings Blinking blue Configuration recovery in progress (MODE
button pushed for 2 to 3 seconds)
Red Ethernet failure or image recovery (MODE
button pushed for 20 to 30 seconds)
Blinking green Image recovery in progress (MODE button
released)
Boot loader errors Red DRAM memory test failure
Blinking red and blue FLASH file system failure
Blinking red and off Environment variable failure
Bad MAC address
Ethernet failure during image recovery
Boot environment failure
No Cisco image file
Boot failure
Cisco IOS errors Red Software failure; try disconnecting and
reconnecting unit power
Cycling through blue,
green, red, and off
General warning; insufficient inline power
Table 1 LED Status Indications (continued)
Message
Type
Status
LED
Message
Meaning

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without enabling CAPWAP debug commands on the controller, the controller collects information for
all access points that send a discovery message to it and maintains information for any access points
that have successfully joined it.
The controller collects all join-related information for each access point that sends a CAPWAP
discovery request to the controller. Collection begins with the first discovery message received from
the access point and ends with the last configuration payload sent from the controller to the access
point.
You can view join-related information for the following numbers of access points:
•Up to 300 access points for 4400 series controllers, the Cisco WiSM, and the Catalyst 3750G
Integrated Wireless LAN Controller Switch
•Up to three times the maximum number of access points supported by the platform for the 2100
series controllers and the Controller Network Module within the Cisco 28/37/38xx Series
Integrated Services Routers
When the controller is maintaining join-related information for the maximum number of access points,
it does not collect information for any more access points.
An access point sends all syslog messages to IP address 255.255.255.255 by default when any of the
following conditions are met:
•An access point running software release 5.2 or later has been newly deployed.
•An existing access point running software release 5.2 or later has been reset after clearing the
configuration.
If any of these conditions are met and the access point has not yet joined a controller, you can also
configure a DHCP server to return a syslog server IP address to the access point using option 7 on the
server. The access point then starts sending all syslog messages to this IP address.
When the access point joins a controller for the first time, the controller sends the global syslog server
IP address (the default is 255.255.255.255) to the access point. After that, the access point sends all
syslog messages to this IP address until it is overridden by one of the following scenarios:
•The access point is still connected to the same controller, and the global syslog server IP address
configuration on the controller has been changed using the config ap syslog host global
syslog_server_IP_address command. In this case, the controller sends the new global syslog server
IP address to the access point.
•The access point is still connected to the same controller, and a specific syslog server IP address
has been configured for the access point on the controller using the config ap syslog host specific
Cisco_AP syslog_server_IP_address command. In this case, the controller sends the new specific
syslog server IP address to the access point.
•The access point is disconnected from the controller and joins another controller. In this case, the
new controller sends its global syslog server IP address to the access point.

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•Whenever a new syslog server IP address overrides the existing syslog server IP address, the old
address is erased from persistent storage, and the new address is stored in its place. The access
point also starts sending all syslog messages to the new IP address provided the access point can
reach the syslog server IP address.
You can configure the syslog server for access points and view the access point join information only
from the controller CLI.
A detailed explanation of the join process is on cisco.com at the following URL:
http://www.cisco.com/en/US/products/ps6366/products_tech_note09186a00808f8599.shtml
9 Declarations of Conformity and Regulatory Information
This section provides declarations of conformity and regulatory information for the Cisco Aironet
1140 Series Access Point.
Manufacturers Federal Communication Commission Declaration of
Conformity Statement
Manufacturer:
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
Models Certification Numbers
AIR-(L)AP1141N-A-K9 LDK102069
AIR-(L)AP1142N-A-K9 LDK102070
Tested To Comply
With FCC Standards
FOR HOME OR OFFICE USE

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This device complies with Part 15 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.
This equipment has been tested and found to comply with the limits of a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a residential environment. This
equipment generates, uses, and radiates radio frequency energy, and if not installed and used in
accordance with the instructions, may cause harmful interference. However, there is no guarantee that
interference will not occur. If this equipment does cause interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to correct the
interference by one of the following measures:
•Reorient or relocate the receiving antenna.
•Increase separation between the equipment and receiver.
•Connect the equipment to an outlet on a circuit different from which the receiver is connected.
•Consult the dealer or an experienced radio/TV technician.
Caution The Part 15 radio device operates on a non-interference basis with other devices operating
at this frequency when using the integrated antennas. Any changes or modification to the
product not expressly approved by Cisco could void the user’s authority to operate this
device.
Caution Within the 5.15 to 5.25 GHz band (5 GHz radio channels 34 to 48) the UNII devices are
restricted to indoor operations to reduce any potential for harmful interference to
co-channel Mobile Satellite System (MSS) operations.

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VCCI Statement for Japan
Guidelines for Operating Cisco Aironet Access Points in Japan
This section provides guidelines for avoiding interference when operating Cisco Aironet access points
in Japan. These guidelines are provided in both Japanese and English.
Warning
This is a Class B product based on the standard of the VCCI Council. If this is
used near a radio or television receiver in a domestic environment, it may
cause radio Interference. Install and use the equipment according to the
instruction manual.
VCCI-B