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


For information about 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:


Support for Cisco Catalyst 9105 Access Points

Support is added for Cisco Catalyst 9105 APs in this release.

  • C9105AXI and C9105AXW: VID 03 and earlier

Support for Cisco Catalyst 9130 Series Access Points Tri-Radio (Dynamic) mode

The Cisco Catalyst 9130 Series Access Point is designed keeping high-density deployment in mind. Hence, this AP includes three radios which support the dual radio mode and the radio role assignment functionality. The AP supports radio roles—monitor and client serving roles under Auto and manual modes. You can manage the modes dynamically by using the Flexible Radio Assignment(FRA) feature for 2.4-GHz radio and Dynamic Channel Assignment (DCA) feature for the two 5-GHz radios or manually.

This feature enhances the existing Cisco Catalyst 9130 Series Access Points Tri-Radio feature by supporting the radio role.


For this release, the Tri-radio function for the Cisco Catalyst 9130AXE External AP is enabled only when using the DART adapter cables AIR-CAB-002-D8-R= (RP-TNC antennas) or AIR-CAB-003-D8-N= (“N” style antennas) with the AP.

For more information about configuring a tri-radio AP, see https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-10/config-guide/b_cg810/managing_aps.html#info_tri_radio

Uplink MU-MIMO in Cisco Catalyst 9130 APs

Uplink Multi-user multiple-input and multiple-output (UL MU MIMO) feature is supported in Cisco Catalyst 9130 APs in this release.

  • Conceptually similar to Downlink MU-MIMO, which is already supported in Cisco Catalyst 9130 APs.

  • Allows multiple clients to send traffic simultaneously, thus saving air time.

  • Controller by AP through triggers sent to clients.

  • Supported in 20-MHz, 40-MHz, and 80-MHz bandwidths, but not supported in the 160-MHz bandwidth.

  • Supported only in the 5-GHz band.

  • Currently limited to support three users. When more than three users are connected, UL MU-MIMO scheduling does not occur, and the AP falls back to single-user (SU) transmission.

Support for Strong Ciphers in Cisco Access Points

This feature enhances access point's security over SSH connections. The weak cipher suites are no longer supported. Any attempt to establish connection using legacy ciphers displays Unable to negotiate a key exchange method error message.

The feature is enabled by default.

Cisco Aironet 4800 Access Point Priority for wIPS Mode

In this feature, wIPS scanning is prioritized in Cisco Aironet 4800 APs. The Cisco Hyperlocation feature is disabled when the AP sub-mode is set to WIPS.

Strong Credentials for Local User and AP Dot1x User

This feature implements stronger user names and passwords requirements for Controller and AP users.

Cisco Catalyst 9117 AP Image Upgrade Bundle

If you are using Cisco Catalyst 9117 APs, then to upgrade to Release, you must download an additional image bundle, ap1g6, which is specific to the Cisco Catalyst 9117 APs. Following are the high-level steps in upgrading to this release:

  1. Download the controller.aes file from the Cisco software download page and upgrade the controller software with this image.

  2. Reboot the controller to load the new image.

  3. Download the apimage.aes (ap1g6) file from the Cisco software download page and upgrade the controller software with this AP image bundle.

  4. Reboot the controller to load the new AP image bundle.

For more information, see Upgrading Cisco Wireless Release section of this document.

IoT Features

  • Support reliable WGB downstream broadcast for multiple VLANs.

    Support to convert downstream broadcast packets to unicast packets in the 4-address format with retransmission to WGB and its wired clients.

    Supported AP platforms

    • Cisco Industrial Wireless 3700 Series Access Points

    • Cisco Aironet 1570 Series Access Points

    Supported WGB platform

    • Cisco Industrial Wireless 3700 Series Access Points

    For more information about the feature, see Reliable WGB Downstream Broadcast for Multiple VLANs section in the Cisco Wireless Controller Configuration Guide, Release 8.10 at


  • Support faster detection of missing M1 or M3 message during 4-way handshake

    Support to configure M1 and M3 timeout value on IOS WGB (IW3700 Series Access Points) to achieve faster detection of missing M1 or M3 message. This enhancement fulfills the requirement for quick roaming to avoid longer outages due to roam. For more information about the feature, see WGB M1 and M3 Timeout Enhancement section in the Cisco Wireless Controller Configuration Guide, Release 8.10


Early Field Trial Features

The following features are in Early Field Trial state:


These features are not yet officially supported and there is no assistance from Cisco's Technical Assistance Center.

What's Changed in Release

This section provides information about the changes and enhancements that are introduced in this release.

OFDMA in Cisco Catalyst 9130 APs

In this release, the Cisco Catalyst 9130 APs support both the Uplink and the Downlink Orthogonal frequency-division multiple access (UL OFDMA and DL OFDMA) features.

Currently, the feature is enhanced to support 37 users in a DL OFDMA or UL OFDMA transmission.

Support for Spectrum Intelligence in Cisco Catalyst 9115 AP

From this release, Spectrum Intelligence feature is supported on Cisco Catalyst 9115 Access Points.

Suppport for Hardware DTLS Encryption in Cisco Catalyst 9115 and 9120 Access Points

From this release, hardware DTLS encryption is supported on Cisco Catalyst 9115 and 9120 Access Points.

Full Certificate Chain for Web Administrator Access

In this feature enhancement, when a web browser is used to access the controller webUI via the HTTPS protocol, the controller sends the full certificate chain to the browser for TLS authentication.

SNMP Support Added to NTP Server for an AP Group

This feature is enhanced to support SNMP for AP group NTP server configuration.

Link Aggregation Group Support Extented to Cisco Aironet 1850 Access Points

From this release, the Link Aggregation Group (LAG) feature is supported on Cisco Aironet 1850 APs in Cisco FlexConnect mode.

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 8.10.x.

Current Software Release

Upgrade Path to Release 8.10.x.


You can upgrade directly to Release 8.10.x.


You can upgrade directly to Release 8.10.x.


You can upgrade directly to Release 8.10.x.


You can upgrade directly to Release 8.10.x.


You can upgrade directly to Release 8.10.x.


You can upgrade directly to Release 8.10.x.

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, 9105 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)

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
Apple iPhone 11

iOS 13.5

DELL LATITUDE 5491 (Intel AX200) Windows 10 Pro (21.40.2)


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 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 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 13.5
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 10
Google Pixel 4 Android 10
Huawei Mate 20 pro Android 9.0
Huawei P20 Pro Android 9.0
LG v40 ThinQ Android 9.0
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 xz3 Android 9.0
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 6.1
Zebra ZT230 Printer LINK OS 6.1
Zebra ZQ310 Printer LINK OS 6.1
Zebra ZT410 Printer LINK OS 6.1
Zebra ZQ610 Printer LINK OS 6.3
Zebra ZQ620 Printer LINK OS 6.1

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

Caveat ID Number



Cisco Wave 2 APs reloads unexpectedly due to FIQ/NMI reset


Cisco Wave 2 APs to not trigger CAC if radio is shutdown less than 16sec in a DFS channel


Cisco 9130I WLAN: [0:E:BSSCOLOR] ieee80211_setup_bsscolor failed : not 11AX channel


Cisco 3800 AP's advertise RSN PSK in the beacon on WLAN with open MAC filtering authentication


WLC - Tracebacks on dot11 auth validation


WLC GUI HTTPs stops working after downloading a web auth certificate


Cisco 3702 AP unable to join controller. Shows high CPU utilization under NCI Rx.


Cisco 9130 AP whal_hwsch.c:2494 Assertion num_proc_entry <= num_peek_entry failed


AireOS drops ARP request or reply when local client tries to reach L3 roamed client


WPA2 clients with PSK-SHA2 are wrongly shown as WPA3 in client details


Tri-Radio: All value in 'RRM Frame Statistics' for Slot 2 is 0


WLC DP unexpectedly reloads due to max out IP Flow


AP9120 Kernel Panic causes AP to reload unexpectedly due to sockets_in_use


3800AP with data DTLS encryption disconnect from 9800 due to CAPWAP keepalive after rx PMTU discover


Cisco 1810W AP reloads unexpectedly on AP running


Cisco 9130 APs not sending DHCP messages over the Air


CoA-NAK does not have correct message length to account for Service-Type


8.10 MR2: fabric WLC unexpected reload observed @serial8250_poll while removing mobility tunnel


WLC on reloads unexpectedly on pmalloc detected memory corruption


Several 1852 APs facing different radio failure FW asserts


Cisco 9120 AP dropping certain UDP packets over the air


MX40 - Cisco 9120 AP dropping certain UDP packets over the air


Memory leak seen in nmspMxServerTask and nmspTxServerTask


Cisco AP reloads unexpectedly with asserts on wifi txfifo id mismatch


9130 AP multicast traffic failures after GTK key index rotation for vocera Clients

Resolved Caveats

Table 13. Resolved Caveats

Caveat ID Number



Access point broadcasts a disabled or deleted SSID


WLC emits error messages: "RRM LOG: No receiver found for IAPP CHD message/AGGR Neigh message"


AP3800 advertises RSN IE for an OPEN SSID.


With IPv6 TGW on AP, fragmentation for IPv4 packets are not handled


8.5 FlexConnect AP in Standalone mode get stranded and does not send CAPWAP Discovery


WLC does not present full certificate in web admin


Cisco Wave 1 APs reload unexpectedly with 'Unexpected exception to CPU' in logs


AP should reply to IGMPv3 Query using IGMPv3 report when CAPWAP multicast is enabled in WLC


Receive throughput degrades for Cisco 2800, 3800, 4800, 1560 APs - AP fails to send block ACKs


Cisco 3700 AP series reloads unexpectedly due to reason 44


FlexConnect peer connectivity breaks after roam with AVC enabled


IPTV getting disconnected intermittently


Controller shows LAN port Status UP even though the status at the AP side is Down and Protocol UP


Cisco 2802 AP in Flex mode in only one site HTTPS packets from WLC to Client getting drop


Cisco 9130E APs: Large ping losses, videos stopping etc during auditorium test


9120AXI unexpectedly reloads with watchdog or grpc_server tainted - PC at "raw_spin_lock+0x24/0x38"


Cisco 1852 AP unexpectedly reloads with GRPC connection timed out


AP's acting as MAP's not able to see RAP's


AP fails to attach the VLAN tag when client user ID changes from central to local switching


Stale client entries getting created in WLC


Cisco WLC controller clients profiled as unknown when doing local profiling


Cisco 1800,1815,1840,1850,1540AP unexpectedly reload due kernel panic triggered by DFS channel use


Cisco 9120 APs unable to see neighbor APs on controller with FIPS enabled


C9130 AP RRM: %LWAPP-3-VENDOR_PLD_VALIDATE_ERR: [PA]spam_lrad.c:12307 Validation of RRM_INTERFERENCE


Cisco 3602 AP Image corruption issue


Client command - 'clear dot11' not deleting client


Controller Reaper Reset in Process SNMPTask


AVC status is getting disabled while configuring service-policy input from DNA.


SSH access to the controller is failing, stating protocol error occurred


Cisco 9130 AP Kernel Panic at cisco_wlan_crypto_decap


Antenna Monitoring and Failure Detection needs to support AP-3802P


WLC uses WLAN interface IP as NAS-IP when per-WLAN RADIUS source support is enabled to AP group


Cisco 2800, 3800, 4800 APs: Support for ANQP BSSID broadcast response


Clients cannot connect to Cisco 1800 AP with 2.4 GHz with hidden SSID


4800 APs stopped supporting European weather band 5600-5650MHz- channels 120,124,128 on 8.10 release


Static CAPWAP path MTU configuration for AP-COS


Cisco 1850AP: /usr/sbin/capwapd: writing to fd 17 failed!: Input/output error


WLC / CMX Telemetry output sending numerous duplicate and erroneous TAG records


AireOS controller not enforcing redirect URL/ACL on second CoA from AAA server


911x AP models shows incorrect details on Acesspoint view of WLC


Cisco 2800, 3800, 4800, 1560 APs are not transmitting data frames over the air


CAPWAP DTLS session closed for AP, because the DTLS server session shutdown


Cisco 4800 AP: flooding syslogs with "BA session Not established?"


WLC reloads unexpectedly while accessing GUI > Monitor > Clients page


Client cannot connect to Cisco Wave 1 APs with dot1x-sha256 received assoc-resp 20


Flexconnect reap count for current users not getting decremented causing new Wi-Fi client disconnect


AireOS GUI: Current TX Rate for 11AX clients is displayed incorrectly


Cisco 9120 AP alpha: DHCP packets to be sent to the clients are dropped by AP


Rate limiting not working for downstream traffic when ACL is pushed from ISE


Cisco 9130 unexpectedly reloads at __qdf_nbuf_is_tso Kernel panic


Cisco Wave 2 APs: EAP-PEAP flex auth fails occasionally because of low EAP-timeout


Clients connected to 2 different autonomous APs with ISE VLAN Override cannot ping in 5GHz radio


Client MAC address is learned from controller interface in SDA fabric


Organization name truncated to less than 64 characters while generating CSR on WLC


9115 AP flash getting 100% utilised.


SDA Wireless: IPv6: Router Advertisement from incorrect VN/pool


Unexpected reload in Task Name: Client Profiler Task


In SDA solution, Multicast stream pauses periodically_mroute state pruning


802.11ax client is displayed as 802.11ac(5 GHz) or 802.11n(2.4 GHz) on Standby WLC


AP1840 consistently running a High Channel Utilization only in 5 GHz without any clients connected.


EWC conversion fails for 9115AX AP with -T domain


CPU increases to 90+% with high volume traffic.


Cisco 9120 power is lower than 2800, 3800 with CCK rates disabled (2.4-GHz)


AP coverage hole with 0 clients


Cisco 9117AX, 9130 AP unexpectedly reloads OOM "handle_mm_fault+ x538/0x1230"


%SAFEC-3-SAFEC_ERROR: safecWrapper.c:57 DATA INCONSISTENCY: (22) strncpy_s: when syncing from Prime


Cisco 9120 AP watchdog_status reason: 14 no crash was generated.


AP sends lower bytes of packets while performing PMTU negotiations.


OEAP config does not get saved to AP flash


1800, 1815, 1840, 1850, 1540 - ERP Field from AP appears to be incorrect


Cisco Wave 2 APs: Reports itself as a Threat and logs "AP Impersonation" alerts


WLC reset on task name: apfRogueTask_2


WLC reloads unexpectedly on ATF stats decode


Wave 2 AP:IPv4 network is unreachable due to Gateway deleted on AP after configuring static IPv6 add


Cisco 18xx APs: Software unexpectedly reloads on Process hostapd


Cisco Wave 1 APs: Inconsistent AP logging level config behavior


85mr6 & later release: Cisco Wave 1 APs not sending deauth rc 7 after Rx frame from non assoc client


Cisco DNA Center 1.3.3: Cisco DNA Center stalls on Rogue Management page


Cisco 1832 AP kernel panic unexpected reload (PC is at vfp_reload_hw)


Cisco 2800, 3800 APs: dropping ARP_REPLY packet post fix for CSCvm07536


8.10 ME: ME/RAP transmit beacon on backhaul universal Client Access disabled and Mapping enabled


Cisco 9120 APs: is not applying trust-dscp-upstream and CAPWAP traffic marked with UP to DSCP


Cisco 9115/9120 APs: 2.4-GHz throughput does not change based on the number of streams


AC Wave 1 AP not sending Cisco NDP Packets on the 2.4GHz band


Cisco Wave 2 APs: Adding ARP entry check to Gateway reachability


Mesh AP: With ACL blocks ping to GW, AP can't join controller if it doesn't complete within 45sec


1532 AP ethernet interface lost packet


DCA sets channel width to 20MHz although 40MHz is set on RF Profile


[AP] Fabric SDA - Fabric APs not taking static-ip address


Not able to download NSP app for pre-auth from google store using DNS based ACLs


Wave 2 APs silver UP 00 to DSCP upstream mapping not capped by bronze profile


WLC should not send client IPv6 packets to switch in CAPWAP or IP


External Webauth URL : ? character is not allowed in this field


Controller reporting incorrect channels for Interferers on NMSP.


Mesh backhual sharing SSIDs still showing state UP after RAP/MAP flexconnect backhual-WLAN disabled


OEAP AP Local configs missing after reload


WLC is triggering too many LRAD delete events for the APs


WLC 8.10 sends mobility packets with MTU greater than 1500 bytes


AP9117: AP not forwarding Server Hello downstream - EAP type PEAP


WLC on reloads unexpectedly with reason "reset due to switch-driver crash"


Cisco 9130 AP does not forward EAP-TLS packets intermittently. drop_memfail counter increasing


Various Android 10 phones fail to associate


AIR-AP2802I-H-K9 WCPd reloads unexpectedly on lick-install/include/click/vector.hh:291


Swaping pri or secon controller from WLC GUI HA tab, the name not apply to AP CLI config


1562 MAP does not create or keep adjacency with RAP from Mobility Express WLC


Configuration changed after upgrade to 8.10.112 release


WLC reloads unexpectedly on RF profile config change


AP9120 and AP9130 have their radio slot 0 changed to monitor mode after enabling fast locate


Cisco 9130 AP: MTU mismatch between NSS and CAPWAP


Cisco 9120 AP reloads unexpectedly with watchdog_last.status reason:14


AP PnP doesn't try sync time with public NTP server


802.11AX clients not listed in the Active Clients filter from the Main Dashboard


5520 model running s/w 8.8.125 sending WSA data with s/w version as 8.6.161


WLC not updating fastpath table after a GW GARP failover


[SDA] With post-auth IPv6 flex ACL traffic breaks for client


Out of box 9130 does not try to discover WLC using IP address returned in DHCP option 43 or DNS


Cisco 2800, 3800 APs sends burst of RTS and BAR randomly leading to low client data rates


WLC shows low power PoE status for 1830 APs with USB port disabled.


WLC reloads unexpectedly due to memory leak & AVC is enabled


9120AXI 17.1.1 reloads unexpectedly on "NMI watchdog: BUG: soft lockup - CPU#1 stuck for 23s!


WLC reloads unexpectedly on DHCP socket task


AireOS controllers unexpectedly reloads randomly at tunnelProfileGwRadiusProxyGetSafe task


OEAP: LAN port 3 (Local Port) client cannot access AP Web GUI


WP OEAP: Client connected to dedicated local port on AP cannot access AP Web GUI

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