GETTING STARTED GUIDE
Cisco Catalyst 9120AX Series Access
Points
First Published: June 21, 2019
Last Updated: July 04, 2019
Cisco Systems, Inc. www.cisco.com
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Cisco Catalyst 9120AX Series Access Points
1 About this Guide
2 About the Access Point
3 Safety Instructions
4 Unpacking
5 AP Views, Ports, and Connectors
6 Preparing the AP for Installation
7 Installation Overview
8 Performing a Pre-Installation Configuration
9 Mounting the Access Point
10 Powering the Access Point
11 Configuring and Deploying the Access Point
12 Checking the Access Point LEDs
13 Miscellaneous Usage and Configuration Guidelines
15 Related Documentation
16 Declarations of Conformity and Regulatory Information
Communications, Services, and Additional Information
Cisco Bug Search Tool
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Cisco Catalyst 9120AX Series Access Points
1 About this Guide
This guide provides instructions on how to install your Cisco Catalyst 9120AX series access points and provides links to
resources which can help you configure the access point. This guide provides mounting instructions and limited
troubleshooting procedures.
The 9120AX series access point is referred to as access point or AP in this document.
2 About the Access Point
The Cisco Catalyst 9120AX series wireless access point is a dual band, dual concurrent, enterprise 802.11ax (Wi-Fi 6)
AP. This AP series has integrated antennas designed to use both 2.4 GHz and the 5 GHz bands. This access point
supports a greater overall High Density Experience (HDX) which provides a more predictable performance for advanced
applications such as 4K or 8K video, high-density and high-definition collaboration applications, all-wireless offices and
Internet-of-Things (IoT). The access point supports full interoperability with leading 802.11ax and 802.11ac clients, and
supports a mixed deployment with other access points and controllers. These APs provide integrated security, resiliency
and operational flexibility as well as increased network intelligence.
A full listing of the access point's features and specifications are provided in the Cisco Catalyst 9120AX Series Access
Point Data Sheet, at the following URL:
https://www.cisco.com/c/en/us/products/collateral/wireless/catalyst-9120ax-series-access-points/datasheet-c78-7
42115.html
Access Point Features
The 9120AX series access point is a wireless controller-based product and supports:
Four dual-band integrated antennas on the 9120AXI access point models (C9120AXI-x and C9120AXI-ME-x)
Note The ‘x’ in the model numbers represents the regulatory domain. For information on supported regulatory
domains, see the“AP Model Numbers and Regulatory Domains” section on page 5.
Integrated internal antennas, omni directional in azimuth for both 2.4 GHz and 5 GHz
Four radios, a dual band radio with 2.4 GHz (peak gain 4dBi) and 4x4 5 GHz (peak gain 5dBi), a single band 5 GHz
(peak gain 5dBi), an omni IoT radio 2.4 GHz (peak gain 3dBi) that can be used with BLE, Zigbee, Thread and other
multi-protocol 802.15.4 devices, and an auxiliary radio with 2.4 GHz (peak gain 3dBi) and 5 GHz (peak gain 5dBi)
Simultaneous 4x4 MIMO with four spatial streams for both 2.4 GHz and 5 GHz bands
Multiuser Multiple-Input Multiple-Output (MU-MIMO) technology with 4 spatial streams for downlink.
Orthogonal Frequency Division Multiple Access (OFDMA)-based scheduling for both downlink and uplink
The following hardware external interfaces:
— 1x100/1000/2500 Multigigabit Ethernet (RJ-45)
— RS-232 Console Interface through RJ-45
— Recovery push button (enables partial or full system configuration recovery)
— USB 2.0 Port
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Cisco Catalyst 9120AX Series Access Points
— One multi-color LED Status indicator. see the “Checking the Access Point LEDs” section on page 14 for
information on the colors of the LED status indicator.
Integrated Bluetooth Low Energy (BLE) radio to enable IoT use cases such as location tracking and wayfinding.
Cisco RF ASIC, a fully integrated Software Defined Radio (SDR), that can perform advanced RF spectrum analysis
and delivers features like CleanAir, Wireless Intrusion Prevention System (WIPS), and DFS detection.
Intelligent Capture probes the network and provides Cisco DNA Center with deep analysis.
Spatial Reuse (also known as Basic Service Set (BSS) coloring) which allows APs and their clients to differentiate
between BSSs, thus permitting more simultaneous transmissions.
New power savings mode called Target Wake Time (TWT) which allows the client to stay asleep and wake up only
at pre-scheduled (target) times to exchange data with the AP. This provides significant energy savings for
battery-operated devices.
Cisco Digital Network Architecture (DNA) support enables Cisco Connected Mobile Experiences, Apple FastLane
and Cisco Identity Services Engine.
Cross-AP Noise Reduction, a Cisco innovation that enables APs to intelligently collaborate in real time about RF
conditions so that users connect with optimized signal quality and performance.
Optimized AP Roaming for ensuring that client devices associate with the AP in their coverage range that offers the
fastest data rate available.
Cisco CleanAir technology enhanced with 160MHz channel support. CleanAir delivers proactive, high-speed
spectrum intelligence across 20-, 40-, and 80-, and 160-MHz-wide channels to combat performance problems
arising from wireless interference.
MIMO equalization capabilities, which optimize uplink performance and reliability by reducing the impact of signal
fade.
The AP supports the following operating modes:
Local—This is the default mode for the Cisco AP. In this mode, the AP serves clients.
FlexConnect—FlexConnect mode for the Cisco AP.
Monitor—This is the monitor-only mode for the Cisco AP.
Sniffer—In the wireless sniffer mode, the AP starts sniffing the air on a given channel. It captures and forwards all the
packets from the clients on that channel to a remote machine that runs Airopeek or Wireshark (packet analyzers for
IEEE 802.11 wireless LANs). This includes information on the time stamp, signal strength, packet size, etc.
Note In the sniffer mode, the server to which the data is sent should be on the same VLAN as the wireless
controller management VLAN otherwise an error will be displayed.
Guidelines and Restrictions for Cisco 802.11ax Access Points
The APs do not support Mobility Express on Cisco AireOS or Cisco IOS-XE platforms.
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Cisco Catalyst 9120AX Series Access Points
AP Model Numbers and Regulatory Domains
AP Type Model Number Details
Access Point for indoor
environments, with internal
antennas
You need to verify whether the AP model you have is approved for use in your country. To verify approval and to identify
the regulatory domain that corresponds to a particular country, visit http://www.cisco.com/go/aironet/compliance. Not
all regulatory domains have been approved. As and when they are approved, this compliance list will be updated.
C9120AXI-x Dual-band, controller-based 802.11ax
C9120AXI-ME-x Dual-band, 802.11ax with a Cisco Mobility
Express software image
Antennas and Radios
The 9120AX series access point has four internal dual-band antennas with a dedicated 2.4 GHz radio and a 5 GHz radio,
four internal single-band antennas with a dedicated 5 GHz radio, one internal single-band antenna with a dedicated
2.4 GHz IOT radio, and one dual-band antenna with a dedicated 2.4 GHz radio and a 5 GHz AUX radio.
The access point configurations are:
C9120AXI-x—Four radios, a dual band radio with 2.4 GHz (peak gain 4dBi) and 4x4 5 GHz (peak gain 5dBi), a single
band 5 GHz (peak gain 5dBi), an omni IoT radio 2.4 GHz (peak gain 3dBi) that can be used with BLE, Zigbee, Thread
and other multi-protocol 802.15.4 devices, and an auxiliary radio with 2.4 GHz (peak gain 3dBi) and 5 GHz (peak
gain 5dBi).
C9120AXI-ME-x—Four radios, a dual band radio with 2.4 GHz (peak gain 4dBi) and 4x4 5 GHz (peak gain 5dBi), a
single band 5 GHz (peak gain 5dBi), an omni IoT radio 2.4 GHz (peak gain 3dBi) that can be used with BLE, Zigbee,
Thread and other multi-protocol 802.15.4 devices, and an auxiliary radio with 2.4 GHz (peak gain 3dBi) and 5 GHz
(peak gain 5dBi).
3 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 Catalyst
Access Points, which is available on 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.
Warning
SAVE THESE INSTRUCTIONS
Read the installation instructions before using, installing or connecting the system to the power source.
Statement 1004
Statement 1071
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Cisco Catalyst 9120AX Series Access Points
Warning
Warning
Warning
Warning
Warning
Installation of the equipment must comply with local and national electrical codes.
In order to comply with FCC radio frequency (RF) exposure limits, antennas should be located at a
minimum of 12 inches (30 cm) or more from the body of all persons.
Ultimate disposal of this product should be handled according to all national laws and regulations.
Statement 1040
The access point, antennas, and all interconnected equipment including the associated LAN
connections must be located indoors within the same building.
This equipment is suitable for use in environment air spaces (plenums) 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, CSA C22.2. External power supply, power adapter and/or power injector, if
provided, are not suitable for installation in air spaces.
4 Unpacking
Statement 1074
Statement 332
Statement 375
Statement 440
To unpack the access point, 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 listed below. If any item is missing or damaged, contact your Cisco
representative or reseller for instructions.
— The access point
— Mounting bracket (AIR-AP-BRACKET-1=, selected when you ordered the access point)
— Adjustable ceiling-rail clip (selected when you ordered the access point)
— Power Injector AIR-PWRINJ6= (only if selected when you ordered the access point).
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Cisco Catalyst 9120AX Series Access Points
5 AP Views, Ports, and Connectors
Figure 1 Face of the 9120AXI Model
Status LED
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Location of the ports and connectors on the
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head of the AP.
USB 2.0 port
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Cisco Catalyst 9120AX Series Access Points
Figure 2 Ports and Connectors on the Head of the 9120AXI Model
2.5GbE port
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RJ-45 console port
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USB 2.0 port.
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Mode button
4
Security hasp for padlocking AP to mounting
bracket
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Cisco Catalyst 9120AX Series Access Points
6 Preparing the AP for Installation
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 desk top.
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: 802.3at (PoE+) (Cisco Power Injector AIR-PWRINJ6=) or 802.3af (Cisco Power Injector
AIR-PWRINJ5=).
Note If 802.3af is used, both the 2.4 GHz and 5 GHz radios will be reduced to 1x1 and Ethernet will be
downgraded to 1 GbE. The USB port will also be off.
Operating temperature: 32°—122°F (0°—50°C)
Note When installing the access point in an environment where the ambient temperature is in the range of
°—122°F (>40°—50°C), the access point must be configured to 2x2 on both the 2.4 GHz and 5 GHz
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radios, 1GbE Ethernet. Also, there should be no load on the USB port.
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.
7 Installation Overview
Installing the access point involves these operations:
Step 1 Performing a Pre-Installation Configuration, page 10 (optional)
Step 2 Mounting the Access Point, page 12
Step 3 Powering the Access Point, page 13
Step 4 Preparing the AP for Installation, page 9
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Cisco Catalyst 9120AX Series Access Points
8 Performing a Pre-Installation Configuration
The following procedures ensure that your access point installation and initial operation go as expected. 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 14 for details.
The pre-installation configuration setup is illustrated in Figure 3.
Figure 3 Pre-Installation Configuration Setup
To perform pre-installation configuration, perform the following steps:
Step 1 Make sure that the Cisco Wireless Controller DS port is connected to the network. Use the procedure for CLI
or web-browser interface as described in the appropriate Cisco Wireless Controller guide.
a. Make sure that access points have Layer 3 connectivity to the Cisco Wireless Controller Management and
AP-Manager Interface.
b. Configure the switch to which your access point is to attach. See the Cisco Wireless Controller Configuration
Guide for the release you are using, for additional information.
c. Set the Cisco Wireless Controller as the master so that new access points always join with it.
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Cisco Catalyst 9120AX Series Access Points
d. Make sure DHCP is enabled on the network. The access point must receive its IP address through DHCP.
Note An 802.11ax Cisco AP will be assigned an IP address from the DHCP server only if a default router
(gateway) is configured on the DHCP server (enabling the AP to receive its gateway IP address) and the
gateway ARP is resolved.
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 “Configuring DHCP Option 43” section on
page 17 for more information.
Note The access point requires a gigabit Ethernet (GbE) 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.
Step 2 Apply power to the access point. See Powering the Access Point, page 13.
a. As the access point attempts to connect to the controller, the LEDs cycle through a green, red, and blue
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 Controller. Check the connection between the access point and the Cisco Wireless
Controller and be sure that they are on the same subnet.
b. If the access point shuts down, check the power source.
c. After the access point finds the Cisco Wireless Controller, it attempts to download the new operating system
code if the access point code version differs from the Cisco Wireless Controller code version. While this is
happening, the Status LED blinks blue.
d. 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 Prime Infrastructure
to customize the access-point-specific 802.11ac 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
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 Controller. Also be sure
that the route back to the Cisco Wireless Controller has destination UDP ports 5246 and 5247 open
for CAPWAP communications. Ensure that the route back to the primary, secondary, and tertiary
controller allows IP packet fragments. Finally, be sure that if address translation is used, that the
access point and the Cisco Wireless Controller have a static 1-to-1 NAT to an outside address. (Port
Address Translation is not supported.)
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Cisco Catalyst 9120AX Series Access Points
9 Mounting the Access Point
Cisco Catalyst 9120AX series access points can be mounted in several configurations – on a suspended ceiling, on a
hard ceiling or wall, on an electrical or network box, and above a suspended ceiling.
For access point mounting instructions, go to the following URL:
http://www.cisco.com/c/en/us/td/docs/wireless/access_point/mounting/guide/apmount.html
The standard mounting hardware supported by the AP is listed in Tabl e 1.
Table 1 Brackets and Clips for Mounting the AP
Part Number Description
Brackets
Clips AIR-AP-T-RAIL-R Ceiling Grid Clip (Recessed mounting)
1. Mount the AP using no less than four screw holes on a bracket.
2. AIR-AP-BRACKET-3 is not compatible for use with Cisco Catalyst 9120AX series access points.
3. You can also use “in-tile” mounting options available from third parties. For more information, visit the
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access point data sheet available on Cisco.com at
https://www.cisco.com/c/en/us/products/collateral/wireless/catalyst-9100ax-access-points/guide-c07-
742311.html.
AIR-AP-BRACKET-1 Low-profile bracket
(This is the default option)
AIR-AP-BRACKET-2 Universal bracket
(This is the default option)
AIR-AP-T-RAIL-F Ceiling Grid Clip (Flush mounting)
AIR-CHNL-ADAPTER Optional adapter for channel-rail ceiling grid profile.
When mounting the AP in areas where there is a possibility of the AP being knocked off the mounting bracket, use the
lock hasp on the back of the AP (see Figure 4) to lock it to the bracket.
Figure 4 Locking the AP to the Bracket
Position of the hasps for the locks on the back of the 9120AXI model
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Cisco Catalyst 9120AX Series Access Points
10 Powering the Access Point
The AP can be powered only through Power-over-Ethernet (PoE) using the following:
802.3at (PoE+): Any 802.3at (30.0 W) compliant switch port or Cisco Power Injector AIR-PWRINJ6=
802.3af: Any 802.3af (15.4 W) compliant switch port or Cisco Power Injector AIR-PWRINJ5=
Note If 802.3af is used, both the 2.4 GHz and 5 GHz radios will be reduced to 1x1 and Ethernet will be
downgraded to 1 GbE. The USB port will also be off.
11 Configuring and Deploying the Access Point
This section describes how to connect the access point to a controller. Because the configuration process takes place
on the controller, see the Cisco Wireless Controller Configuration Guide for additional information.
The Controller Discovery Process
Note • The controller must be running release 8.9.111.0 as it supports 9120AX series access points. For more
information, visit the access point data sheet available on Cisco.com at
https://www.cisco.com/c/en/us/products/collateral/wireless/catalyst-9100ax-access-points/guide-c07-742311.
html.
• You cannot edit or query any access point using the controller CLI if the name of the access point contains
a space.
• 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.
Access points must be discovered by a controller before they can become an active part of the network. The access
point supports these controller discovery processes:
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 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 10.
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” section on page 17.
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-CAPWAP-CONTROLLER.localdomain, where localdomain is the access point domain name. Configuring the
CISCO-CAPWAP-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-CAPWAP-CONTROLLER.localdomain. When the DNS sends a list of controller IP addresses, the access
point sends discovery requests to the controllers.
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Cisco Catalyst 9120AX Series Access Points
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 (for LED descriptions, see “Checking the Access Point LEDs” section on
page 14).
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 green, red, and off. When the access point has joined a controller, the
LED is chirping green if no clients are associated or green if one or more clients are associated.
b. If the LED is not on, the access point is most likely not receiving power.
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 Controller. Check the connection between the access point and the
Cisco Wireless Controller, and be sure the access point and the Cisco Wireless Controller are either on the
same subnet or that the access point has a route back to its primary, secondary, and tertiary Cisco Wireless
Controller. Also, if the access point is not on the same subnet as the Cisco Wireless 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” section on page 17 for additional information.
Step 3 Reconfigure the Cisco Wireless Controller so that it is not the master.
Note A master Cisco Wireless Controller should be used only for configuring access points and not in a
working network.
12 Checking the Access Point LEDs
The location of the access point status LED is shown in Figure 2.
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.
However, the intensity of the LED can be changed through the controller.
The access point status LED indicates various conditions and are described in Tabl e 2.
Table 2 LED Status Indications
Message Type LED State Message Meaning
Association status Green Normal operating condition, but no
wireless client associated
Blue Normal operating condition, at least one
wireless client association
Boot loader status Green Executing boot loader
Boot loader error Blinking Green Boot loader signing verification failure
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Cisco Catalyst 9120AX Series Access Points
Table 2 LED Status Indications (continued)
Message Type LED State Message Meaning
Operating status Blinking Blue Software upgrade in progress
Access point operating
system errors
Alternating between Green and
Red
Cycling through
Red-Off-Green-Off-Blue-Off
Cycling through
Blue-Red-Green-Off
Discovery/join process in progress
Access point location command invoked
from controller web interface.
General warning; insufficient inline power
13 Miscellaneous Usage and Configuration Guidelines
Using the Mode Button
Using the Mode button (see Figure 2) you can:
Reset the AP to the default factory-shipped configuration.
Clear the AP internal storage, including all configuration files.
To use the mode button, press, and keep pressed, the mode button on the access point during the AP boot cycle. Wait
until the AP status LED changes to Blue. During this, the AP console shows a seconds counter, counting the number of
seconds the mode button is pressed. Then:
To reset the AP to the default factory-shipped configuration, keep the mode button pressed for less than 20
seconds. The AP configuration files are cleared.
This resets all configuration settings to factory defaults, including passwords, WEP keys, the IP address, and the
SSID.
To clear the AP internal storage, including all configuration files and the regulatory domain configuration, keep the
mode button pressed for more than 20 seconds, but less than 60 seconds.
The AP status LED changes from Blue to Red, and all the files in the AP storage directory are cleared.
If you keep the mode button pressed for more than 60 seconds, the mode button is assumed faulty and no changes are
made.
Troubleshooting the Access Point to Cisco Controller Join Process
Note Ensure that your controller is running controller software Release 8.9.111.0 or later as specified in see the
Cisco Wireless Solutions Software Compatibility Matrix.
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 and the controller 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.
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Cisco Catalyst 9120AX Series Access Points
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 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.
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 8.2.110.0 or later has been newly deployed.
An existing access point running software release 8.2.110.0 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.
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.
Important Information for Controller-based Deployments
Keep these guidelines in mind when you use 9120AX series access point:
The access point can only communicate with Cisco wireless 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 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.
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Cisco Catalyst 9120AX Series Access Points
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.
Configuring 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.
The following is a DHCP Option 43 configuration example on a Windows 2003 Enterprise DHCP server for use with Cisco
Catalyst lightweight access points. For other DHCP server implementations, consult product documentation for
configuring DHCP Option 43. In Option 43, you should use the IP address of the controller management interface.
Note DHCP Option 43 is limited to one access point type per DHCP pool. You must configure a separate DHCP
pool for each access point type.
The 9120AX series access point uses the type-length-value (TLV) format for DHCP Option 43. DHCP servers must be
programmed to return the option based on the access point DHCP Vendor Class Identifier (VCI) string (DHCP Option 43).
The VCI string for the 9120AX series access point is:
Cisco AP C9120AX
The format of the TLV block is listed below:
Type—0xf1 (decimal 241)
Length—Number of controller IP addresses * 4
Value—IP addresses of the WLC management interfaces listed sequentially in hex
To configure DHCP Option 43 in the embedded Cisco IOS DHCP server, follow these steps:
Step 1 Enter configuration mode at the Cisco IOS CLI.
Step 2 Create the DHCP pool, including the necessary parameters such as default router and name server. A DHCP
scope example is as follows:
ip dhcp pool <pool name>
network <IP Network> <Netmask>
default-router <Default router>
dns-server <DNS Server>
Where:
<pool name> is the name of the DHCP pool, such as AP9120AX
<IP Network> is the network IP address where the controller resides, such as 10.0.15.1
<Netmask> is the subnet mask, such as 255.255.255.0
<Default router> is the IP address of the default router, such as 10.0.0.1
<DNS Server> is the IP address of the DNS server, such as 10.0.10.2
Step 3 Add the option 43 line using the following syntax:
option 43 hex <hex string>
The hex string is assembled by concatenating the TLV values shown below:
Type + Length + Value
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Cisco Catalyst 9120AX Series Access Points
For example, suppose that there are two controllers with management interface IP addresses, 10.126.126.2 and
10.127.127.2. The type is f1(hex). The length is 2 * 4 = 8 = 08 (hex). The IP addresses translate to 0a7e7e02 and
0a7f7f02. Assembling the string then yields f1080a7e7e020a7f7f02. The resulting Cisco IOS command added to the
DHCP scope is option 43 hex f1080a7e7e020a7f7f02.
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Cisco Catalyst 9120AX Series Access Points
14 FAQs
What is 802.11ax?
The IEEE 802.11ax standard, also known as the High-Efficiency Wireless (HEW) or Wi-Fi 6, builds off of the 802.11ac
and delivers a better experience in typical environments, and a more predictable performance for advanced applications
such as 4K or 8K video, high-density high-definition collaboration applications, all-wireless offices and
Internet-of-Things (IoT). 802.11ax is designed to use both 2.4Ghz and the 5GHz bands, unlike prior standards.
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Cisco Catalyst 9120AX Series Access Points
15 Related Documentation
All user documentation for the Cisco Catalyst 9120AX series access point is available at the following URL:
http://www.cisco.com/c/en/us/support/wireless/aironet-9120AX-series-access-points/tsd-products-support-serieshome.html
For detailed information and guidelines for configuring and deploying your access point in a wireless network, see the
following documentation:
Cisco Wireless Controller Configuration Guide, Release 8.9, at the following URL:
http://www.cisco.com/c/en/us/td/docs/wireless/controller/8-9/config-guide/b_cg89.html
Cisco Catalyst 9120AX Series Access Point Deployment Guide, at the following URL:
https://www.cisco.com/c/en/us/products/collateral/wireless/catalyst-9100ax-access-points/guide-c07-742311.
html
16 Declarations of Conformity and Regulatory Information
This section provides declarations of conformity and regulatory information for the Cisco Catalyst 9120AX Series Access
Points. You can find additional information at this URL:
www.cisco.com/go/aironet/compliance
Manufacturers Federal Communication Commission Declaration of Conformity Statement
Access Point Models Certification Number
C9120AXI-B LDKVCVER1937
Manufacturer:
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
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.
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Cisco Catalyst 9120AX Series Access Points
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.
VCCI Statement for Japan
Warning
This is a Class B product based on the standard of the Voluntary Control
Council for Interference from Information Technology Equipment (VCCI). 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.
21
Cisco Catalyst 9120AX Series Access Points
03-6434-6500
208697
Guidelines for Operating Cisco Catalyst Access Points in Japan
This section provides guidelines for avoiding interference when operating Cisco Catalyst access points in Japan. These
guidelines are provided in both Japanese and English.
Japanese Translation
English Translation
This equipment operates in the same frequency bandwidth as industrial, scientific, and medical devices such as
microwave ovens and mobile object identification (RF-ID) systems (licensed premises radio stations and unlicensed
specified low-power radio stations) used in factory production lines.
1. Before using this equipment, make sure that no premises radio stations or specified low-power radio stations of
RF-ID are used in the vicinity.
2. If this equipment causes RF interference to a premises radio station of RF-ID, promptly change the frequency or stop
using the device; contact the number below and ask for recommendations on avoiding radio interference, such as
setting partitions.
3. If this equipment causes RF interference to a specified low-power radio station of RF-ID, contact the number below.
Contact Number: 03-6434-6500
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Cisco Catalyst 9120AX Series Access Points
Statement 371—Power Cable and AC Adapter
English Translation
When installing the product, please use the provided or designated connection cables/power cables/AC adaptors. Using
any other cables/adaptors could cause a malfunction or a fire. Electrical Appliance and Material Safety Law prohibits the
use of UL-certified cables (that have the “UL” shown on the code) for any other electrical devices than products
designated by CISCO. The use of cables that are certified by Electrical Appliance and Material Safety Law (that have
“PSE” shown on the code) is not limited to CISCO-designated products.
Industry Canada
Access Point Models Certification Number
C9120AXI-A 2461N-VCVER1937
Canadian Compliance Statement
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two
conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including
interference that may cause undesired operation of the device.
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence.
L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2)
l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en
compromettre le fonctionnement.
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or
lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the
antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than
that necessary for successful communication.
Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un
type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques
de brouillage radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que
la puissance isotrope rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une
communication satisfaisante.
This radio transmitter has been approved by Industry Canada to operate with the antenna types listed below with the
maximum permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included
in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this
device.
Le présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés
ci-dessous et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types
d'antenne non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits
pour l'exploitation de l'émetteur.
23
Cisco Catalyst 9120AX Series Access Points
Antenna Type Antenna Gain Antenna Impedance
Single-band Omni 3 dBi 50 ohms
Dual-band Omni 3/5 dBi 50 ohms
Dual-band Omni 4/5 dBi 50 ohms
Single-Band HPOL 5 dBi 50 ohms
Operation in the band 5150-5250 MHz is only for indoor use to reduce the potential for harmful interference to
co-channel mobile satellite systems.
La bande 5 150-5 250 MHz est réservés uniquement pour une utilisation à l'intérieur afin de réduire les risques de
brouillage préjudiciable aux systèmes de satellites mobiles utilisant les mêmes canaux.
Users are advised that high-power radars are allocated as primary users (i.e. priority users) of the bands 5250-5350
MHz and 5650-5850 MHz and that these radars could cause interference and/or damage to LE-LAN devices.
Les utilisateurs êtes avisés que les utilisateurs de radars de haute puissance sont désignés utilisateurs principaux
(c.-à-d., qu'ils ont la priorité) pour les bandes 5 250-5 350 MHz et 5 650-5 850 MHz et que ces radars pourraient causer
du brouillage et/ou des dommages aux dispositifs LAN-EL.
European Community, Switzerland, Norway, Iceland, and Liechtenstein
Access Point Models:
C9120AXI-E
Note This equipment is intended to be used in all EU and EFTA countries. Outdoor use may be restricted to certain
frequencies and/or may require a license for operation. For more details, contact Cisco Corporate
Compliance.
The product carries the CE Mark:
Declaration of Conformity for RF Exposure
This section contains information on compliance with guidelines related to RF exposure.
Generic Discussion on RF Exposure
The Cisco products are designed to comply with the following national and international standards on Human Exposure
to Radio Frequencies:
US 47 Code of Federal Regulations Part 2 Subpart J
American National Standards Institute (ANSI) / Institute of Electrical and Electronic Engineers / IEEE C 95.1 (99)
International Commission on Non Ionizing Radiation Protection (ICNIRP) 98
Ministry of Health (Canada) Safety Code 6. Limits on Human Exposure to Radio Frequency Fields in the range from
3kHz to 300 GHz
24
Cisco Catalyst 9120AX Series Access Points
Australia Radiation Protection Standard
To ensure compliance with various national and international Electromagnetic Field (EMF) standards, the system should
only be operated with Cisco approved antennas and accessories.
This Device Meets International Guidelines for Exposure to Radio Waves
The 9120AX series device includes a radio transmitter and receiver. It is designed not to exceed the limits for exposure
to radio waves (radio frequency electromagnetic fields) recommended by international guidelines. The guidelines were
developed by an independent scientific organization (ICNIRP) and include a substantial safety margin designed to ensure
the safety of all persons, regardless of age and health.
As such the systems are designed to be operated as to avoid contact with the antennas by the end user. It is
recommended to set the system in a location where the antennas can remain at least a minimum distance as specified
from the user in accordance to the regulatory guidelines which are designed to reduce the overall exposure of the user
or operator.
Separation Distance
MPE Distance Limit
0.2611 mW/cm
2
30 cm (12 inches) 1.00 mW/cm
2
The World Health Organization has stated that present scientific information does not indicate the need for any special
precautions for the use of wireless devices. They recommend that if you are interested in further reducing your exposure
then you can easily do so by reorienting antennas away from the user or placing he antennas at a greater separation
distance then recommended.
This Device Meets FCC Guidelines for Exposure to Radio Waves
The 9120AX series device includes a radio transmitter and receiver. It is designed not to exceed the limits for exposure
to radio waves (radio frequency electromagnetic fields) as referenced in FCC Part 1.1310. The guidelines are based on
IEEE ANSI C 95.1 (92) and include a substantial safety margin designed to ensure the safety of all persons, regardless
of age and health.
As such the systems are designed to be operated as to avoid contact with the antennas by the end user. It is
recommended to set the system in a location where the antennas can remain at least a minimum distance as specified
from the user in accordance to the regulatory guidelines which are designed to reduce the overall exposure of the user
or operator.
The device has been tested and found compliant with the applicable regulations as part of the radio certification process.
Separation Distance
MPE Distance Limit
0.2611 mW/cm
The US Food and Drug Administration has stated that present scientific information does not indicate the need for any
special precautions for the use of wireless devices. The FCC recommends that if you are interested in further reducing
your exposure then you can easily do so by reorienting antennas away from the user or placing the antennas at a greater
separation distance then recommended or lowering the transmitter power output.
2
30 cm (12 inches) 1.00 mW/cm
2
25
Cisco Catalyst 9120AX Series Access Points
This Device Meets the Industry Canada Guidelines for Exposure to Radio Waves
The 9120AX series device includes a radio transmitter and receiver. It is designed not to exceed the limits for exposure
to radio waves (radio frequency electromagnetic fields) as referenced in Health Canada Safety Code 6. The guidelines
include a substantial safety margin designed into the limit to ensure the safety of all persons, regardless of age and
health.
As such the systems are designed to be operated as to avoid contact with the antennas by the end user. It is
recommended to set the system in a location where the antennas can remain at least a minimum distance as specified
from the user in accordance to the regulatory guidelines which are designed to reduce the overall exposure of the user
or operator.
Separation Distance
Frequency MPE Distance Limit
2.4 GHz
5GHz
1.72 W/m
2.55 W/m
2
30 cm (12 inches) 5.4 W/m
2
9.2 W/m
Health Canada states that present scientific information does not indicate the need for any special precautions for the
use of wireless devices. They recommend that if you are interested in further reducing your exposure you can easily do
so by reorienting antennas away from the user, placing the antennas at a greater separation distance than recommended,
or lowering the transmitter power output.
2
2
Cet appareil est conforme aux directives internationales en matière d'exposition aux fréquences radioélectriques
Cet appareil de la gamme 9120AX comprend un émetteur-récepteur radio. Il a été conçu de manière à respecter les
limites en matière d'exposition aux fréquences radioélectriques (champs électromagnétiques de fréquence radio),
recommandées dans le code de sécurité 6 de Santé Canada. Ces directives intègrent une marge de sécurité importante
destinée à assurer la sécurité de tous, indépendamment de l'âge et de la santé.
Par conséquent, les systèmes sont conçus pour être exploités en évitant que l'utilisateur n'entre en contact avec les
antennes. Il est recommandé de poser le système là où les antennes sont à une distance minimale telle que précisée par
l'utilisateur conformément aux directives réglementaires qui sont conçues pour réduire l'exposition générale de
l'utilisateur ou de l'opérateur.
Distance d'éloignement
Fréquence MPE Distance Limite
2.4 GHz
5GHz
1.72 W/m
2.55 W/m
2
30 cm (12 inches) 5.4 W/m
2
9.2 W/m
Santé Canada affirme que la littérature scientifique actuelle n'indique pas qu'il faille prendre des précautions particulières
lors de l'utilisation d'un appareil sans fil. Si vous voulez réduire votre exposition encore davantage, selon l'agence, vous
pouvez facilement le faire en réorientant les antennes afin qu'elles soient dirigées à l'écart de l'utilisateur, en les plaçant
à une distance d'éloignement supérieure à celle recommandée ou en réduisant la puissance de sortie de l'émetteur.
2
2
Additional Information on RF Exposure
You can find additional information on the subject at the following links:
Cisco Systems Spread Spectrum Radios and RF Safety white paper at this URL:
http://www.cisco.com/warp/public/cc/pd/witc/ao340ap/prodlit/rfhr_wi.htm
26
Cisco Catalyst 9120AX Series Access Points
FCC Bulletin 56: Questions and Answers about Biological Effects and Potential Hazards of Radio Frequency
Electromagnetic Fields
FCC Bulletin 65: Evaluating Compliance with the FCC guidelines for Human Exposure to Radio Frequency
Electromagnetic Fields
You can obtain additional information from the following organizations:
World Health Organization Internal Commission on Non-Ionizing Radiation Protection at this URL: www.who.int/emf
United Kingdom, National Radiological Protection Board at this URL: www.nrpb.org.uk
Cellular Telecommunications Association at this URL: www.wow-com.com
The Mobile Manufacturers Forum at this URL: www.mmfai.org
27
Cisco Catalyst 9120AX Series Access Points
Administrative Rules for Cisco Catalyst Access Points in Taiwan
This section provides administrative rules for operating Cisco Catalyst access points in Taiwan. The rules for all access
points are provided in both Chinese and English.
Chinese Translation
English Translation
Administrative Rules for Low-power Radio-Frequency Devices
Article 12
For those low-power radio-frequency devices that have already received a type-approval, companies, business units or
users should not change its frequencies, increase its power or change its original features and functions.
Article 14
The operation of the low-power radio-frequency devices is subject to the conditions that no harmful interference is
caused to aviation safety and authorized radio station; and if interference is caused, the user must stop operating the
device immediately and can't re-operate it until the harmful interference is clear.
The authorized radio station means a radio-communication service operating in accordance with the Communication
Act.
The operation of the low-power radio-frequency devices is subject to the interference caused by the operation of an
authorized radio station, by another intentional or unintentional radiator, by industrial, scientific and medical (ISM)
equipment, or by an incidental radiator.
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Cisco Catalyst 9120AX Series Access Points
Chinese Translation
English Translation
Low-power Radio-frequency Devices Technical Specifications
4.7 Unlicensed National Information Infrastructure
4.7.5 Within the 5.25-5.35 GHz band, U-NII devices will be restricted to indoor operations to
reduce any potential for harmful interference to co-channel MSS operations.
4.7.6 The U-NII devices shall accept any interference from legal communications and shall not
interfere the legal communications. If interference is caused, the user must stop operating
the device immediately and can't re-operate it until the harmful interference is clear.
4.7.7 Manufacturers of U-NII devices are responsible for ensuring frequency stability such that an
emission is maintained within the band of operation under all conditions of normal operation
as specified in the user manual.
Operation of Cisco Catalyst Access Points in Brazil
This section contains special information for operation of Cisco Catalyst access points in Brazil.
Access Point Models:
C9120AXI-Z
29
Cisco Catalyst 9120AX Series Access Points
Communications, Services, and Additional Information
Figure 5 Brazil Regulatory Information
Portuguese Translation
Este equipamento não tem direito à proteção contra interferência prejudicial e não pode causar interferência em
sistemas devidamente autorizados.
English Translation
This equipment is not entitled to the protection from harmful interference and may not cause interference with duly
authorized systems.
Declaration of Conformity Statements
All the Declaration of Conformity statements related to this product can be found at the following location:
http://www.ciscofax.com
Communications, Services, and Additional Information
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To submit a service request, visit Cisco Support.
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To obtain general networking, training, and certification titles, visit Cisco Press.
To find warranty information for a specific product or product family, access Cisco Warranty Finder.
Cisco Bug Search Tool
Cisco Bug Search Tool (BST) is a web-based tool that acts as a gateway to the Cisco bug tracking system that maintains
a comprehensive list of defects and vulnerabilities in Cisco products and software. BST provides you with detailed defect
information about your products and software.
© 2019 Cisco Systems, Inc. All rights reserved.
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Cisco Catalyst 9120AX Series Access Points
Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL:
www.cisco.com/go/trademarks. Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship
between Cisco and any other company. (1721R)
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Cisco Catalyst 9120AX Series Access Points
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