About the Release Notes

This release notes document describes what is new or changed in this release, instructions to upgrade to this release, and provides information about the open and resolved caveats for this release. Unless otherwise noted, in this document, Cisco Wireless Controllers are referred to as controllers, and Cisco lightweight access points are referred to as access points or APs.

Supported Cisco Wireless Controller Platforms

The following controller platforms are supported in this release:

  • Cisco 3504 Wireless Controller

  • Cisco 5520 Wireless Controller

  • Cisco 8540 Wireless Controller

  • Cisco Virtual Wireless Controller (vWLC) on the following platforms:

    • VMware vSphere Hypervisor (ESXi) Version 5.x and 6.x

    • Hyper-V on Microsoft Server 2012 and later versions (support introduced in Release 8.4)

    • Kernel-based virtual machine (KVM) (support introduced in Release 8.1). After KVM is deployed, we recommend that you do not downgrade to a Cisco Wireless release that is earlier than Release 8.1).

  • Cisco Wireless Controllers for High Availability for Cisco 3504 Wireless Controller, Cisco 5520 Wireless Controller, and Cisco 8540 Wireless Controller

  • Cisco Mobility Express


In a network that includes Cisco Catalyst Center (formerly Cisco DNA Center) and Cisco AireOS controller, and the controller fails provisioning with Error NA serv CA certificate file transfer failed error, as a workaround, we recommend you reboot the affected AireOS controller.

Supported Cisco Access Point Platforms

The following Cisco AP platforms are supported in this release:

  • Cisco Catalyst 9105 Access Points

    • C9105AXI: VID 03 and earlier

    • C9105AXW: VID 01

  • Cisco Catalyst 9130 Access Points

    • C9130AXE: VID 02 and earlier

    • C9130AXI: VID 02 and earlier

  • Cisco Catalyst 9120 Access Points

    • C9120AXI: VID 06 and earlier

    • C9120AXE: VID 06 and earlier

    • C9120AXP: All VIDs

  • Cisco Catalyst 9117 Access Points

  • Cisco Catalyst 9115 Access Points

  • Cisco Aironet 700 Series Access Points

  • Cisco Aironet 700W Series Access Points

  • Cisco AP803 Integrated Access Point

  • Integrated Access Point on Cisco 1100, 1101, and 1109 Integrated Services Routers

  • Cisco Aironet 1700 Series Access Points

  • Cisco Aironet 1800 Series Access Points

  • Cisco Aironet 1810 Series OfficeExtend Access Points

  • Cisco Aironet 1810W Series Access Points

  • Cisco Aironet 1815 Series Access Points

  • Cisco Aironet 1830 Series Access Points

  • Cisco Aironet 1840 Series Access Points

  • Cisco Aironet 1850 Series Access Points

  • Cisco Aironet 2700 Series Access Points

  • Cisco Aironet 2800 Series Access Points

  • Cisco Aironet 3700 Series Access Points

  • Cisco Aironet 3800 Series Access Points

  • Cisco Aironet 4800 Series Access Points

  • Cisco ASA 5506W-AP702

  • Cisco Aironet 1530 Series Access Points

  • Cisco Aironet 1540 Series Access Points

  • Cisco Aironet 1560 Series Access Points

  • Cisco Aironet 1570 Series Access Points

  • Cisco Industrial Wireless 3700 Series Access Points

  • Cisco Catalyst IW6300 Heavy Duty Series Access Points

  • Cisco 6300 Series Embedded Services Access Points

Cisco AP803 is an integrated access point module on the Cisco 800 Series Integrated Services Routers (ISRs). For more information about the stock-keeping units (SKUs) for the AP803 Cisco ISRs, see:


For more information about the integrated access point on Cisco 1100 ISR, see the product data sheet:


For information about the Cisco Wireless software releases that support specific Cisco access point modules, see the "Software Release Support for Specific Access Point Modules" section in the Cisco Wireless Solutions Software Compatibility Matrix document.

What's New in Release

This section provides a brief introduction to the new features and enhancements that are introduced in this release.


For a complete list of all the documentation published for Cisco Wireless Release 8.10, see the Documentation Roadmap at: https://www.cisco.com/c/en/us/td/docs/wireless/doc-roadmap/doc-roadmap-release-810.html

Software Release Types and Recommendations

Table 1. Release Types

Release Type



Maintenance Deployment (MD)

Software releases that provide bug-fix support and ongoing software maintenance. These releases are categorized as Maintenance Deployment (MD).

These releases are long-living releases with ongoing software maintenance.

Provides you with a software release that offers stability and long support duration with periodic maintenance releases (MRs).

Early Deployment (ED)

Software releases that provide new features and new hardware platform support in addition to bug fixes. These releases are categorized as Early Deployment (ED).

These releases are short-lived releases.

Allows you to deploy the latest features and new hardware platforms or modules.

For detailed release recommendations, see the Guidelines for Cisco Wireless Software Release Migration Bulletin at:


Table 2. Upgrade Path to Cisco Wireless Release

Current Software Release

Upgrade Path to Release


You can upgrade directly to Release


You can upgrade directly to Release


You can upgrade directly to Release


You can upgrade directly to Release


You can upgrade directly to Release


You can upgrade directly to Release

Upgrading a Cisco Wireless Release

This section describes the guidelines and limitations that you must be aware of when you are upgrading the Cisco Wireless release and the procedure to upgrade.

Guidelines and Limitations

  • An existing WLAN with ? in its name continues to be supported with this upgrade. However, you cannot include ? in the name when creating a new WLAN.

  • If an AP locks out the console due to default management user credentials, you must configure the controller AP global credential with non-default username and password to get access to the AP console.

  • WPA3 upgrade and downgrade guidelines:

    • If you want to upgrade from Release 8.5 to 8.10 and have WPA1 configured with none of the WPA1 AKM valid for Release 8.10, the WPA1 configuration is disabled after the upgrade.

    • If you downgrade from Release 8.10 to Release 8.5, if any AKM for SAE is configured, the AKM validation fails after the downgrade. The security is set to WPA2 and AKM to 802.1X. However, PMF configuration is retained, which results in an error.

    • FT set to enabled state and PMF set to Required state is allowed in Release 8.10 because PMF and FT configurations are decoupled. However, in Release 8.5, this configuration invalid. Therefore, upon downgrading to Release 8.5, the WLAN might be disabled.

  • Software downgrade guidelines for Release 8.10:

    • If you plan to downgrade the Cisco controller from Release 8.10 software, we recommend you to downgrade to Release or later release to prevent the controller configuration files from being corrupted.

    • If you have configured new country codes in Release 8.10 and if you plan to downgrade to an earlier release, then we recommend that you remove the new country code configurations prior to the downgrade. For more information, see CSCvq91895.

  • Before downgrading or upgrading the Cisco Controller to another release check for APs or AP modes support. Ensure that only supported APs are connected and also the APs are moved to supported modes on the release that the controller is upgraded or downgraded to.

  • Legacy clients that require RC4 or 3DES encryption type are not supported in Local EAP authentication.

  • If you downgrade to Release or 8.0.15x.0, and later upgrade to a later release and and also have the multiple country code feature configured, then the configuration file could get corrupted. When you try to upgrade to a later release, special characters are added in the country list causing issues when loading the configuation. For more information, see CSCve41740.


    Upgrade and downgrade between other releases does not result in this issue.
  • After downloading the new software to the Cisco APs, it is possible that a Cisco AP may get stuck in an upgrading image state. In such a scenario, it might be necessary to forcefully reboot the controller to download a new controller software image or to reboot the controller after the download of the new controller software image. You can forcefully reboot the controller by entering the reset system forced command.

  • It is not possible to download some of the older configurations from the controller because of the Multicast and IP address validations. See the "Restrictions on Configuring Multicast Mode" section in the Cisco Wireless Controller Configuration Guide for detailed information about platform support for global multicast and multicast mode.

  • When a client sends an HTTP request, the controller intercepts it for redirection to the login page. If the HTTP GET request that is intercepted by the controller is longer than 2000 bytes, the controller drops the packet. Track the Caveat ID CSCuy81133 for a possible enhancement to address this restriction.

  • When downgrading from one release to an earlier release, you might lose the configuration from your current release. The workaround is to reload the previous controller configuration files that are saved in the backup server, or to reconfigure the controller.

  • When you upgrade a controller to an intermediate release, wait until all the APs that are associated with the controller are upgraded to the intermediate release before you install the latest controller software. In large networks, it can take some time to download the software on each AP.

  • You can upgrade to a new release of the controller software or downgrade to an earlier release even if FIPS is enabled.

  • When you upgrade to the latest software release, the software on the APs associated with the controller is also automatically upgraded. When an AP is loading software, each of its LEDs blinks in succession.

  • Controllers support standard SNMP MIB files. MIBs can be downloaded from the software download page on Cisco.com.

  • The controller software that is factory-installed on your controller and is automatically downloaded to the APs after a release upgrade and whenever an AP joins a controller. We recommend that you install the latest software version available for maximum operational benefit.

  • Ensure that you have a TFTP, HTTP, FTP, or SFTP server available for the software upgrade. Follow these guidelines when setting up a server:

    • Ensure that your TFTP server supports files that are larger than the size of controller software image. Some TFTP servers that support files of this size are tftpd32 and the TFTP server within Cisco Prime Infrastructure. If you attempt to download the controller software image and your TFTP server does not support files of this size, the following error message appears:

      TFTP failure while storing in flash

    • If you are upgrading through the distribution system network port, the TFTP or FTP server can be on the same subnet or a different subnet because the distribution system port is routable.

  • The controller Bootloader stores a copy of the active primary image and the backup image. If the primary image becomes corrupted, you can use the Bootloader to boot with the backup image.

    With the backup image stored before rebooting, from the Boot Options menu, choose Option 2: Run Backup Image to boot from the backup image. Then, upgrade with a known working image and reboot controller.

  • You can control the addresses that are sent in the Control and Provisioning of Wireless Access Points (CAPWAP) discovery responses when NAT is enabled on the Management Interface, using the following command:

    config network ap-discovery nat-ip-only {enable | disable}

    The following are the details of the command:

    enable —Enables use of NAT IP only in a discovery response. This is the default. Use this command if all the APs are outside the NAT gateway.

    disable —Enables use of both NAT IP and non-NAT IP in a discovery response. Use this command if APs are on the inside and outside the NAT gateway, for example, Local Mode and OfficeExtend APs are on the same controller.


    To avoid stranding of APs, you must disable the AP link latency (if enabled) before you use the disable option in the config network ap-discovery nat-ip-only command. To disable AP link latency, use the config ap link-latency disable all command.
  • Do not power down the controller or any AP during the upgrade process. If you do this, the software image might get corrupted. Upgrading the controller with a large number of APs can take as long as 30 minutes, depending on the size of your network. However, with the increased number of concurrent AP upgrades supported, the upgrade time should be significantly reduced. The APs must remain powered, and controller must not be reset during this time.

  • After you perform the following functions on the controller, reboot it for the changes to take effect:

    • Enable or disable LAG.

    • Enable a feature that is dependent on certificates (such as HTTPS and web authentication).

    • Add a new license or modify an existing license.


      Reboot is not required if you are using Right-to-Use licenses.
    • Increase the priority of a license.

    • Enable HA.

    • Install the SSL certificate.

    • Configure the database size.

    • Install the vendor-device certificate.

    • Download the CA certificate.

    • Upload the configuration file.

    • Install the Web Authentication certificate.

    • Make changes to the management interface or the virtual interface.

Upgrading Cisco Wireless Software (GUI)


Step 1

Upload your controller configuration files to a server to back up the configuration files.



We highly recommend that you back up your controller configuration files prior to upgrading the controller software.

Step 2

Follow these steps to obtain controller software:

  1. Browse to the Software Download portal at: https://software.cisco.com/download/home.

  2. Search for the controller model.

  3. Click Wireless LAN Controller Software.

  4. The software releases are labeled as described here to help you determine which release to download. Click a controller software release number:

    • Early Deployment (ED)—These software releases provide new features and new hardware platform support as well as bug fixes.

    • Maintenance Deployment (MD)—These software releases provide bug fixes and ongoing software maintenance.

    • Deferred (DF)—These software releases have been deferred. We recommend that you migrate to an upgraded release.

  5. Click the filename <filename.aes>.

  6. Click Download.

  7. Read the Cisco End User Software License Agreement and click Agree.

  8. Save the file to your hard drive.

  9. Repeat steps a through h to download the remaining file.

Step 3

Copy the controller software file <filename.aes> to the default directory on your TFTP, FTP, SFTP, or USB server.

Step 4

(Optional) Disable the controller 802.11 networks.



For busy networks, controllers on high utilization, and small controller platforms, we recommend that you disable the 802.11 networks as a precautionary measure.

Step 5

Choose Commands > Download File to open the Download File to Controller page.

Step 6

From the File Type drop-down list, choose Code.

Step 7

From the Transfer Mode drop-down list, choose TFTP, FTP, SFTP, HTTP, or USB.

Step 8

Enter the corresponding server details as prompted.



Server details are not required if you choose HTTP as the transfer mode.

Step 9

Click Download to download the software to the controller.

A message indicating the status of the download is displayed.



Ensure that you choose the File Type as Code for both the images.

Step 10

After the download is complete, click Reboot.

Step 11

If you are prompted to save your changes, click Save and Reboot.

Step 12

Click OK to confirm your decision to reboot the controller.

Step 13

If you have disabled the 802.11 networks, reenable them.

Step 14

(Optional) To verify that the controller software is installed on your controller, on the controller GUI, click Monitor and view the Software Version field under Controller Summary.

CIMC Utility Upgrade for 5520 and 8540 Controllers

The AIR-CT5520-K9 and AIR-CT8540-K9 controller models are based on Cisco UCS server C series, C220 and C240 M4 respectively. These controller models have CIMC utility that can edit or monitor low-level physical parts such as power, memory, disks, fan, temperature, and provide remote console access to the controllers.

We recommend that you upgrade the CIMC utility to a version that has been certified to be used with these controllers. Controllers that have older versions of CIMC installed are susceptible to rebooting without being able to access FlexFlash, with the result that the manufacturing certificates are unavailable, and thus SSH and HTTPS connections will fail, and access points will be unable to join. See: CSCvo33873. The recommended versions addresses the vulnerability tracked in CSCvo01180 caveat.

The certified CIMC images are available at the following locations:

Table 3. CIMC Utility Software Image Information
Controller Current CIMC Version Recommended CIMC Version Link to Download the CIMC Utility Software Image

Cisco 5520 Wireless Controller

Cisco 8540 Wireless Controller





We recommend you to upgrade the firmware from 2.0(13i) to 3.0(4r) using TFTP, SCP protocols only.

Cisco 5520 Wireless Controller

Cisco 8540 Wireless Controller




Cisco 5520 Wireless Controller

Cisco 8540 Wireless Controller




Table 4. Firmware Upgrade Path to 4.x version
Current Firmware Version Upgrade Path to 4.x version


You must upgrade to a 3.x version and then upgrade to the recommended 4.x version.


You can upgrade directly to the recommended 4.x version.

Table 5. Resolved Caveats for Release 4.0(2f)
Caveat ID Description


NI-HUU fails to handle the special characters in the password of CIFS remote share

Table 6. Resolved Caveats for Release 3.0(4l)
Caveat ID Description


SSH weak KeyExchange algorithm [diffie-hellman-group14-sha1] has to be removed

Interoperability with Other Clients

This section describes the interoperability of controller software with other client devices.

The following table describes the configuration that is used for testing the client devices.

Table 7. Test Bed Configuration for Interoperability
Hardware or Software Parameter Hardware or Software Configuration Type



Cisco Wireless Controller

Cisco 3504 Wireless Controller

Access Points

Cisco 9130, 9120 and 3800 APs


802.11ax (2.4 GHz or 5 GHz), 802.11ac, 802.11a, 802.11g, 802.11n (2.4 GHz or 5 GHz)


Open, WPA3-SAE/OWE ( WPA3 Supported Clients), WPA2+WPA3 ( Mixed Mode) PSK (WPA2-AES), 802.1X (WPA2-AES)(EAP-PEAP)


Cisco ISE 2.5

Types of tests

Association, Traffic ( TCP/UDP/ICMP) and Roaming between APs

The following table lists the client types on which the tests were conducted. Client types included laptops, handheld devices, phones, and printers.

Table 8. Client Types
Client Type and Name Driver / Software Version

Wi-Fi 6 Devices (Mobile Phone and Laptop)

Apple iPhone 11 iOS 14.1

Apple iPhone SE 2020

iOS 14.1
Dell Intel AX1650w Windows 10 (
DELL LATITUDE 5491 (Intel AX200) Windows 10 Pro (21.40.2)
Samsung S20 Android 10
Samsung S10 (SM-G973U1) Android 9.0 (One UI 1.1)
Samsung S10e (SM-G970U1) Android 9.0 (One UI 1.1)
Samsung Galaxy S10+ Android 9.0

Samsung Galaxy Fold 2

Android 10

Samsung Galaxy Flip Z

Android 10

Samsung Note 20

Android 10


Acer Aspire E 15 E5-573-3870 (Qualcomm Atheros QCA9377) Windows 10 Pro (
Apple Macbook Air 11 inch OS Sierra 10.12.6
Apple Macbook Air 13 inch OS Catalina 10.15.4
Apple Macbook Air 13 inch OS High Sierra 10.13.4
Macbook Pro Retina OS Mojave 10.14.3
Macbook Pro Retina 13 inch early 2015 OS Mojave 10.14.3

Dell Inspiron 2020 Chromebook

Chrome OS 75.0.3770.129

Google Pixelbook Go

Chrome OS 84.0.4147.136

HP chromebook 11a

Chrome OS 76.0.3809.136

Samsung Chromebook 4+

Chrome OS 77.0.3865.105

DELL Latitude 3480  (Qualcomm DELL wireless 1820) Win 10 Pro (
DELL Inspiron 15-7569 (Intel Dual Band Wireless-AC 3165) Windows 10 Home (
DELL Latitude E5540 (Intel Dual Band Wireless AC7260) Windows 7 Professional (21.10.1)
DELL XPS 12 v9250 (Intel Dual Band Wireless AC 8260 ) Windows 10 (
DELL Latitude 5491 (Intel AX200) Windows 10 Pro (21.40.2)
DELL XPS Latitude12 9250 (Intel Dual Band Wireless AC 8260) Windows 10 Home (21.40.0)

Lenovo Yoga C630 Snapdragon 850 (Qualcomm AC 2x2 Svc)

Windows 10(1.0.10440.0)

Lenovo Thinkpad Yoga 460 (Intel Dual Band Wireless-AC 9260) Windows 10 Pro ( 21.40.0)


For clients using Intel wireless cards, we recommend you to update to the latest Intel wireless drivers if advertised SSIDs are not visible.


Apple iPad Pro iOS 13.5
Apple iPad Air2 MGLW2LL/A iOS 12.4.1
Apple iPad Mini 4 9.0.1 MK872LL/A iOS 11.4.1
Apple iPad Mini 2 ME279LL/A iOS 12.0
Microsoft Surface Pro 3 – 11ac Qualcomm Atheros QCA61x4A
Microsoft Surface Pro 3 – 11ax Intel AX201 chipset. Driver v21.40.1.3
Microsoft Surface Pro 7 – 11ax Intel Wi-Fi chip (HarrisonPeak AX201) (11ax, WPA3)
Microsoft Surface Pro X – 11ac & WPA3 WCN3998 Wi-Fi Chip (11ac, WPA3)

Mobile Phones

Apple iPhone 5 iOS 12.4.1
Apple iPhone 6s iOS 13.5
Apple iPhone 8 iOS 13.5
Apple iPhone X MQA52LL/A iOS 13.5
Apple iPhone 11 iOS 14.1
Apple iPhone SE MLY12LL/A iOS 11.3
ASCOM SH1 Myco2 Build 2.1
ASCOM SH1 Myco2 Build 4.5
ASCOM Myco 3 v1.2.3 Android 8.1
Drager Delta VG9.0.2
Drager M300.3 VG2.4
Drager M300.4 VG2.4
Drager M540 DG6.0.2 (1.2.6)
Google Pixel 2 Android 10
Google Pixel 3 Android 11

Google Pixel 3a

Android 11

Google Pixel 4 Android 11
Huawei Mate 20 pro Android 9.0
Huawei P20 Pro Android 9.0

Huawei P40

Android 10

LG v40 ThinQ Android 9.0

One Plus 8

Android 10

Oppo Find X2

Android 10

Redmi K20 Pro

Android 10

Samsung Galaxy S7 Andriod 6.0.1
Samsung Galaxy S7 SM - G930F Android 8.0
Samsung Galaxy S8 Android 8.0
Samsung Galaxy S9+ - G965U1 Android 9.0
Samsung Galaxy SM - G950U Android 7.0

Sony Experia 1 ii

Android 10

Sony Experia xz3 Android 9.0

Xiaomi Mi10

Android 10

Spectralink 8744 Android 5.1.1
Spectralink Versity Phones 9540 Android 8.1
Vocera Badges B3000n
Vocera Smart Badges V5000
Zebra MC40 Android 5.0
Zebra MC40N0 Android Ver: 4.1.1
Zebra MC92N0 Android Ver:  4.4.4
Zebra TC51 Android 7.1.2
Zebra TC52 Android 8.1.0
Zebra TC55 Android 8.1.0
Zebra TC57 Android 8.1.0
Zebra TC70 Android 6.1
Zebra TC75 Android 6.1.1
Zebra QLn320 Printer LINK OS 6.3
Zebra ZT230 Printer LINK OS 6.3
Zebra ZQ310 Printer LINK OS 6.3
Zebra ZD410 Printer LINK OS 6.3
Zebra ZT410 Printer LINK OS 6.3
Zebra ZQ610 Printer LINK OS 6.3
Zebra ZQ620 Printer LINK OS 6.3

Wireless Module

Intel 11ax 200

Driver v21.40.1.3, v21.20.1.1

Intel AC 9260

Driver v21.40.0

Intel Dual Band Wireless AC 8260

Driver v19.50.1.6

Key Features Not Supported in Controller Platforms

This section lists the features that are not supported on various controller platforms:


In a converged access environment that has controllers running AireOS code, High Availability Client SSO and native IPv6 are not supported.

Key Features Not Supported in Cisco 3504 Wireless Controller

  • Cisco WLAN Express Setup Over-the-Air Provisioning

  • Mobility controller functionality in converged access mode

  • VPN Termination (such as IPsec and L2TP)

Key Features Not Supported in Cisco 5520 and 8540 Wireless Controllers

  • Internal DHCP Server

  • Mobility controller functionality in converged access mode

  • VPN termination (such as IPsec and L2TP)

  • Fragmented pings on any interface

Key Features Not Supported in Cisco Virtual Wireless Controller

  • Cisco Umbrella

  • Software-defined access

  • Domain-based ACLs

  • Internal DHCP server

  • Cisco TrustSec

  • Access points in local mode

  • Mobility or Guest Anchor role

  • Wired Guest

  • Multicast


    FlexConnect locally switched multicast traffic is bridged transparently for both wired and wireless on the same VLAN. FlexConnect APs do not limit traffic based on IGMP or MLD snooping.

  • FlexConnect central switching in large-scale deployments


    • FlexConnect central switching is supported in only small-scale deployments, wherein the total traffic on controller ports is not more than 500 Mbps.

    • FlexConnect local switching is supported.

  • Central switching on Microsoft Hyper-V deployments

  • AP and Client SSO in High Availability

  • PMIPv6

  • Datagram Transport Layer Security (DTLS)

  • EoGRE (Supported only in local switching mode)

  • Workgroup bridges

  • Client downstream rate limiting for central switching

  • SHA2 certificates

  • Controller integration with Lync SDN API

  • Cisco OfficeExtend Access Points

Key Features Not Supported in Access Point Platforms

This section lists the key features that are not supported on various Cisco Aironet AP platforms. For detailed information about feature support on Cisco Aironet Wave 2 and 802.11ax APs, see:


Key Features Not Supported in Cisco Aironet 1800i, 1810 OEAP, 1810W, 1815, 1830, 1850, 2800, 3800, and 4800 Series APs

Table 9. Key Features Not Supported in Cisco Aironet 1800i, 1810 OEAP, 1810W, 1815, 1830, 1850, 2800, 3800, and 4800 Series APs

Operational Modes

  • Autonomous Bridge and Workgroup Bridge (WGB) mode



    WGB is supported in Cisco Aironet 2800, 3800 Series APs.

  • Mesh mode



    Mesh mode is supported in Cisco Aironet 1815i, 1815m, 1830, 1850, 2800, 3800, and 4800 Series APs in Release 8.10.x.

  • LAG behind NAT or PAT environment


  • Full Cisco Compatible Extensions (CCX) support

  • Rogue Location Discovery Protocol (RLDP)

  • Telnet


  • CKIP, CMIC, and LEAP with Dynamic WEP

  • Static WEP for CKIP

  • WPA2 + TKIP


    WPA +TKIP and TKIP + AES protocols are supported.

Quality of Service

Cisco Air Time Fairness (ATF)



ATF is supported in Cisco Aironet 2800, 3800, and 4800 Series APs in Release 8.10.

FlexConnect Features

  • PPPoE

  • Multicast to Unicast (MC2UC)



    VideoStream is supported

  • Traffic Specification (TSpec)

    • Cisco Compatible eXtensions (CCX)

    • Call Admission Control (CAC)

  • VSA/Realm Match Authentication

  • SIP snooping with FlexConnect in local switching mode


For Cisco Aironet 1850 Series AP technical specifications with details on currently supported features, see the Cisco Aironet 1850 Series Access Points Data Sheet.

Key Features Not Supported in Cisco Aironet 1800i, 1810 OEAP, and 1810W Series APs

Table 10. Key Features Not Supported in Cisco Aironet 1800i, 1810 OEAP, and 1810W Series APs

Operational Modes

Mobility Express

FlexConnect Features

Local AP authentication

Location Services

Data RSSI (Fast Locate)

Key Features Not Supported in Cisco Aironet 1830, 1850, and 1815 Series APs

Table 11. Key Features Not Supported in Cisco Aironet 1830, 1850, and 1815 Series APs

Operational Modes

Mobility Express is not supported in Cisco 1815t APs.

FlexConnect Features

Local AP Authentication

Location Services

Data RSSI (Fast Locate)

Key Features Not Supported in Mesh Networks

  • Load-based call admission control (CAC). Mesh networks support only bandwidth-based CAC or static CAC

  • High availability (Fast heartbeat and primary discovery join timer)

  • AP acting as supplicant with EAP-FASTv1 and 802.1X authentication

  • AP join priority (Mesh APs have a fixed priority)

  • Location-based services

Key Features Not Supported in Cisco Aironet 1540 Mesh APs

  • Dynamic Mesh backhaul data rate.


    We recommend that you keep the Bridge data rate of the AP as auto.

  • Background scanning

  • Noise-tolerant fast convergence

Key Features Not Supported on Cisco Aironet 1560 APs

  • MAC Authentication FlexConnect Local Authentication

  • Noise-tolerant fast convergence

  • Static WEP

Key Features Not Supported on Cisco Catalyst IW6300 Heavy Duty Series AP and 6300 Series Embedded Services AP

  • MAC Authentication FlexConnect Local Authentication

  • Noise-tolerant fast convergence

  • Static WEP

Unfixed and Fixed Issues in Release

Open Caveats

Table 12. Open Caveats




Cisco 1800APs: add FW checksum and auto refresh to avoid FW assert radio crash by bitflip


Cisco 9120AX AP Correctable ECC Error detected when booting up


Cisco Aironet 1572EAC Access Point does not respond to the Canadian EIRP regulation


GUI displays incorrect tagged VLAN data


Cisco 3802 AP: ME Controller reloads unexpectedly with OOM due to: process naconnector


APs do not send NDP packets on slot 1


Cisco 9120AX AP Not Forwarding the EAP Identity Request Downstream over the air


WGB Wired Clients MAC Flapping Between The Actual Port And the WGB Switch Port


Cisco 9130 Access Point does not send M1 over the Air


Cisco 9130AX AP on 17.6.2 EFT software: radio FW/ucode crash


Cisco 9130AX AP reloads unexpectedly due to PC is at __qdf_bug+0x0/0x8 osif_delete_vap_wait_and_free


Cisco 9115AX AP: assert:"SCB_DEL_IN_PROGRESS(scb)" failed: "wlc_assoc.c:11911" wl: Bad Address


Cisco 9130AX AP: high channel utilization and client lags with 9 or more clients using MS TEAMS


Cisco 9117AX AP radio reloads unexpectedly


Cisco 3802 FQI/NMI reset: loop_delay & wlRecv


Cisco 9117AX AP reloads unexpectedly due radio failure(radio recovery failed)Beacons stuck on Radio1


Cisco 9120AX APs show as Flexible Radio Assignment (FRA) not capable on 17.3.4c release


Cisco 9117AX AP reloads unexpectedly at cmnos_thread.c:3493


Cisco 9117AX AP reloads unexpectedly at whal_recv.c:629


Cisco 9117AX AP reloads unexpectedly at whal_xmit.c:3663


Cisco 1810 AP restarts abnormally on the controller due to Out of Memory


Cisco 9130AX AP radio firmware crash: ar_wal_peer.c:8149 Assertion !WAL_IS_TID_QOS_DATA


Factory reset via physical button is not always working


The value of "Channel Center Segment 0" in " VHT Operation Info"


Kernel panic : PC is at mv_pp3_dev_open+0xbfc/0x1014 on 17.3.5EFT


Kernel panic : PC is at pci_common_init_dev+0xa4/0x2c0 on 17.3.5EFT


Getting RRM errors when U3 stats feature disabled on Cisco Wave 2 APs


Cisco 2800,3800 APs on 8.10.162: Power Type displayed is incorrect when static power is set to 15.4W


Null pointer de-reference in wlc_wnm_is_wnmsleeping


Cisco 2802 AP reloads unexpectedly due to FIQ/NMI reset

Resolved Caveats

Table 13. Resolved Caveats




Self-signed certificates expire on 00:00 1 Jan 2020 UTC, cannot be created after the time expires


ME: Internal error, Lock of ipv6_sisf_engine_semaphore failed when IPv6 is disabled globally


Cisco Aironet 3802 AP is not able to acknowledge EAP frames (EAP-TLS)


C9130: message "unlzma: write: No space left on device" on upgrade to 17.7 Increase max size of /tmp


Cisco Wave2 and 802.11AX APs syslog only seen when using "Kern" facility value in AP join profile


Cisco 1852 AP: Kernel panic - not syncing: softlockup: hung tasks


Cisco Catalyst 9120 APs cannot send acknowledgement over the air during EAP negotiation


Cisco Aironet 3802 AP drops Zebra client traffic intermittently after fast transition roams


Cisco 9120 AP unexpectedly reloads due to Radio driver


Cisco 9115, AP9120 APs: Wireless client SNR value shown as 0 on Client 360 page


COS AP does not accept WPA2-PSK password on WGB with special character but works fine in IOS AP


Cisco Aironet 1832 AP displays /usr/sbin/capwapd: writing to fd 17 failed!: Input/output error


UE does not roam from Macro to Micro Cell on AP2800 with dual 5-GHz radios


Clients get incorrect AP VLAN IP with Cisco Aironet 2800 AP in flex mode


17.6: WLAN client fails to associate when switching between WLANs on wpa3-sae in flex: local auth


Cisco Aironet 1570 AP does not display the RRM neighbors


Numerous core dumps are observed in Cisco Aironet 2800 and 3800 APs slot 1 radios


Access point with 17.6 image cannot join AireOS controller


Cisco Catalyst 9120 AP reloads unexpectedly after an upgrade to failed to add RFIC image


C9130AX AP connected client is randomly stuck in IP learning state when BSS coloring is enabled


Macbook clients are stuck in IPLEARN_PENDING status


Kernel panic crash is observed in Cisco Catalyst 9130 AP


Kernal slab memory leaks are observed in Cisco Aironet 3800 AP on flex local switching WLAN


The non-Wi-Fi channel utilization shows 41


Cisco Catalyst 9130 AP experiences radio firmware crash on Radio 1 multiple times a day


CSA event after Radar detection is missed in the driver


Cisco Catalyst 9120 AP stops transmitting to Macbook after a session re-authentication


Controller not sending "termination request" to the LMA, when client disconnects


Smart license configuration is missing from the backup file on Cisco 3504 controllers


AP forgets its TAG after a second reboot or CAPWAP restart


802.11ax AP BSS Color Global Config push from Controller not applied to AP Groups


Cisco 9130AP Kernel panic crash after N+1 failover or fallback


Cisco Catalyst 9115 AP reloads unexpectedly after loading the 17.3.3 ES6 image


Controller sends Association Response with status 53 for Apple iPhoneXS iPhoneX


Cisco Aironet 1832 AP ends abnormally due to "translation fault"


Cisco COS APs detects its own BSSID as rogue


8.10_stale entry noticed on the controller


Controller running image reloads unexpectedly due to memory corruption


Roaming client stops receiving IP multicast in a new Cisco Aironet 3800 AP


Cisco controller silently reloads unexpectedly due to memory leak.


Controller switchover occurs unexpectedly due to memory leak


Cisco Wave 2 APs reload unexpectedly due to kernel panic


Flex local-sw COS-APs not plumbing preauth ACL for first client connection attempt for CWA and EWA


Increased Ping loss after two days of reboot


Need to update BCM Tx/Rx error stats


Packet drops are observed at device driver level


4800 APs in ELM and Local mode on same controller/same RF group are detecting each other as honeypot


Cisco Aironet 2802 AP experiences radio crash


Cisco Aironet 2800 and 3800 APs experience Kernel Panic Driver crash when PC is at wlRxRingCleanup


Workgroup bridge (WGB) cannot associate when PSK password contains special characters


Connected AP with non-EWC image undergoes factory reset after reload when DHCP option 43 is set


C9130AXI AP cannot connect to the controller after shut or no shut on a C9300-48H switch interface


Cisco Aironet 2800 AP FW crash is observed in Radio 0


Cisco Aironet 2802 or 3802 AP fails to bring up its radios and continuously logs messages


Cisco Catalyst 9120 AP FW crash is observed in Radio 1


Cisco Catalyst 9130 AP stale clients in the radio driver table causes associations to fail


Cisco Catalyst 9120AXI AP displays kernel panic in Cisco IOS-XE


AireOS is unable to receive M2 from MAC addresses with 0x888e in the middle octet (central auth)


Opportunistic Key Caching (OKC) is not pushed from the controller to AP when applied in CLI


Cisco 3800/4800 WIPS AP does not list few BSSIDs in RRM neighbor list causing false honeypot alarms


Retried 802.11r auth packet forwarded to controller causes duplicate auth responses sent to client


COS AP fragmenting CAPWAP discovery packets are unable to join the controller


Cisco 9120 AP running 17.3.4ES2 is facing RX stuck not ACKing any of the received frames


Cisco 1832 AP experiences kernel panic while setting client ACL in Cisco IOS XE 17.3.4


Cisco Catalyst 9130 AP flashes insufficient power LED when USB is enabled on PoE+ Switch


COS AP Probe filter to limit unwanted probes from AP to Controller not working


Controller constanlty reloading due to switch-driver crash ,(Version:


Unexpected string interleaves CLI output on Controller-ME show run-config commands


Cisco Catalyst 9120AXE AP displays incorrect PID and description for Self Identifying Antenna


Cisco Catalyst 9130 AP reloads unexpectedly on 17.3.4 CCO version


Cisco Catalyst 9120 Series AP sends packets with QoS TID when WMM is disabled on WLAN


Unexpected system reload is observed in C9120AXI-B APs joined to C9800-CL running Cisco 17.6.1


Mobility Express can't input WLAN user information CSV file on GUI


AP reports disassoc reason of 'Link failure' as AP reloads unexpectedly


Cisco Catalyst 9130 APs unexpectedly reboot due to kernel panic


Cisco Catalyst 9120 AP reloads unexpectedly due to kernel panic on 2.4-GHz band


Cisco Catalyst 9130 AP: Radio operates in channel 128 and publishes in channel 56


Controller reloads unexpectedly in spamApTask&lt;n&gt; process with NtpServerSyncPayload


Cisco Aironet 1815 APs reloads unexpectedly and radio would not come up


17.3.4 - 1815 - FW assert issue


C9120 AP FlexConnect drops ARP request from client to gateway after a WLAN change (local to central)


Cisco Catalyst 9115 AP reloads unexpectedly due to kernel panic PC


Cisco 8540 HA rellads unexpectedly due to pmalloc double free (capwap_ac_sm.c)


AP 1832 reloads unexpectedly due to radio failure - Beacon Stuck - reset radio for recovery


Cisco Catalyst 9120 APs in monitor mode cannot update neighbor-list causing false honeypot alarms


9120 -NDP Received frames from neighbour AP with RSSI lower than configured RxSOP


Cisco Catalyst 9130 APs reloads unexpectedly after upgrading to 17.3.4 and applying the ESW7 image


AP reloads unexpectedly due to: radio failure(too many radio failures)


Cisco 9117 AP reloads unexpectedly due to kernel panic dp_rx_process


[HCA] PSM microcode watchdog with Cisco 9120 APs


Cisco 8540 HA controller resets due to unexpected system reload (spamApTask)


APs make too many connections to Identitymgmt causing Identitymgmt to crash


Cisco Catalyst 9130 AP unexpectedly reloads with a kernel panic


Cisco 9120 APs not responding to client association requests


Cisco 9120 AP: Change parameter under WLAN will reset 9120 AP radio


Cisco Aironet 3800 series AP crash due to kernel panic (PC is at vfp_reload_hw+0x30/0x44)


Cisco 9800 not sending the right AID causing AP's to not accept new clients


Cisco 9115 AP reload unexpectedly due to Kernel panic - not syncing: Fatal exception


Cisco 9120AP PS Pretend changng client to be in PS mode evn whn client is replying to QoS Null


Cisco 9120 radio 1 gets stuck in Tx


Cisco controller shows all 802.11AX clients are connected on 1 spatial stream


Client cannot connect to tri-radio (slot 2)


AireOS Controller Umbrella token name should be restricted to 25 characters


Cisco 9120 AP Kernal crash


MU sounding errors leading to TCQ stuck issue


Cisco 3802 FQI/NMI reset at rb_next+0xc


Cisco 9120 AP drops CAPWAP connection when running debug client


Client fabric de-registration sent 10 seconds before the client is deleted, causing 10 sec outage


Cisco 9130 AP Kernel Panic Crash __dma_inv_range in monitor path


Cisco 5520 controller reloads unexpectedly on 8.10.51 in SSO mode


AP reloads unexpectedly at FW assert at ar_wal_peer.c:1553


Cisco 9130 AP reloads unexpectedly on KP at dp_rx_frag_handle+0x8c/0x8e0 [wifi_3_0]


Cisco 9120 APs High Client Count while neighboring APs have very few clients associated


Cisco 9120 AP: Randomly retains 802.11w client though it is deleted from the Controller


Cisco 9130 AP Slot 2 Mode is changed to local when AP is working on FlexConnect mode


MU sounding errors leading to TCQ stuck issue


Cisco 1832 AP Indonesia is not beaconing as expected causing client performance issue


Kernel panic : PC is at txq_hw_fill+0x36c/0x1018 on 17.3.5EFT


AP2800/AP3800 with CAC configured only updating QBSS_AAC sent by WLC after radio reset

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