Explore the Content Hub, the all new portal that offers an enhanced product documentation experience.

  • Use faceted search to locate content that is most relevant to you.

  • Create customized PDFs for ready reference.

  • Benefit from context-based recommendations.

Get started with the Content Hub at to craft a personalized documentation experience.

Do provide feedback about your experience with the Content Hub.

These release notes describe what is new or changed in the release, instructions to upgrade to this release, and open and resolved caveats for this release. These release notes are updated as needed to provide information about new features, caveats, potential software deferrals, and related documents.

The Cisco Mobility Express network solution inherits all features that were released prior to the introduction of the Cisco Wireless Release with a few exceptions. For information about inherited features that were introduced prior to this release, see the Existing Features section of the .


The Cisco Mobility Express wireless network solution is available starting from Cisco Wireless Release

We recommend that you view the field notices for this release to check whether your software or hardware platforms are affected. If you have an account on, you can find the field notices at:

However, if you do not have a account, you can find the field notices at:

Overview of Cisco Mobility Express

The Cisco Mobility Express wireless network solution comprises of at least one 802.11ac Wave 2 Cisco Aironet Series access point (AP) with an in-built software-based wireless controller (WLC) managing other APs in the network.

The AP acting as the WLC is referred to as the primary AP while the other APs in the Cisco Mobility Express network, which are managed by this primary AP, are referred to as subordinate APs.

In addition to acting as a WLC, the primary AP also operates as an AP to serve clients along with the subordinate APs.

Cisco Mobility Express provides most features of a Cisco WLC and has the capability to interface with the following:

  • Cisco Prime Infrastructure—For simplified network management, including managing AP groups

  • Cisco Identity Services Engine—For advanced policy enforcement

  • Connected Mobile Experiences (CMX)—For providing presence analytics and guest access using Connect & Engage

Supported Cisco Access Points

The following Cisco Aironet Series APs are supported in the Cisco Mobility Express network:


  • APs listed under primary APs can also function as subordinate APs.

  • The software on the APs listed under primary APs can be converted from Cisco Mobility Express to CAPWAP Lightweight AP software and vice versa. For ordering information, visit the Cisco Aironet Access Points Ordering Guide

Table 1. Cisco APs Supported in Cisco Mobility Express

Primary APs

Subordinate APs

Cisco Aironet 1830 Series

Cisco Aironet 1850 Series

Cisco Catalyst 9100 (Applicable to Release

Cisco Aironet 1700 Series

Cisco Aironet 1800i

Cisco Aironet 1810w

Cisco Aironet 2700 Series

Cisco Aironet 3700 Series

Cisco Aironet 700i

Cisco Aironet 700w

Maximum APs and Clients Supported

Depending on the primary AP in the Cisco Mobility Express network, the maximum number of APs and clients supported varies.

Table 2. Scale Supported in Cisco Mobility Express Network

Primary AP Model

Maximum APs Supported

Maximum Clients Supported


If there are more than 25 Access Points in a Mobility Express network, the primary AP(running the Wireless LAN controller function) can service a maximum of 20 clients. This limit only applies to primary AP and not any other Access Point in the Mobility Express network.

New and Changed Features

  • GUI enhancements with the following provisions:

    • Software Update via SFTP

    • DNS Pre-Auth ACLs

    • Passive client support

    • Remote LAN support for APs with multiple ethernet ports

    • Wireless Service Assurance enhancement

    • AAA override of VLAN name and VLAN name-id template

    • Limit clients per AP radio or WLAN

    • Bidirectional rate limiting per WLAN, client, and BSSID

    • Dynamic OID update

    • Additional security options in WLAN:

      • Central web authentication (CWA) with change of authorization (CoA)

      • Single SSID configuration for BYOD devices.

    • Image download improvements, including initial setup (Day 0)

    • Upload OUI, EAP Device Certificate, and EAP CA Certificate

Cisco Mobility Express Software Release Information

The following table lists the Cisco Wireless Release and software for Cisco Aironet APs that are Cisco Mobility Express capable (primary APs).


  • After updating the Cisco Mobility Express software, clear your browser cache before continuing use. Do either of the following before using the Cisco Mobility Express GUI after the software update:

    • Restart your browser and log in to the GUI.

    • Log out from the GUI and login again.

  • Choose the appropriate AP software based on the following:

    • Cisco Mobility Express software to be used for converting the AP from the unified wireless network CAPWAP lightweight AP to a Cisco Mobility Express-capable AP (primary AP)

    • AP software image bundle to be used either for upgrading the Cisco Mobility Express software on the primary AP or for updating the software on the subordinate APs or both

Prior to ordering these Cisco Aironet APs, visit the Cisco Aironet Access Points Ordering Guide.

Table 3. Cisco Mobility Express Software for Cisco Aironet APs

Primary AP

AP Software for Conversion from CAPWAP to Cisco Mobility Express

AP Software Image Bundle for Upgrade

AP Software in the Bundle

Cisco Aironet 1540 series



Cisco Aironet 1560 series



Cisco Aironet 1815 series



Cisco Aironet 1830 series



Cisco Aironet 1850 series



Cisco Aironet 2800 series



Cisco Aironet 3800 series



Installing Cisco Mobility Express Software

For software installation instructions, see the “Getting Started” section in the .

Limitations and Caveats

Known Limitations

  • Internet Group Management Protocol (IGMP)v3 is not supported on Cisco Aironet Wave 2 APs.

  • If the Cisco AP has a Cisco Mobility Express software image, it will not support link aggregation groups (LAG) even if it is 802.3ad (LACP)-compliant.

  • Over-the-DS fast BSS transition and fast transition PSK authentication are not supported.


Caveats describe unexpected behavior in the Cisco Mobility Express network solution. Severity 1 caveats are the most serious while Severity 2 caveats are less serious. Severity 3 caveats are moderately serious and only select severity 3 caveats are listed here.

The and sections list the caveats in the Cisco Mobility Express network solution for Cisco Wireless Release . The following information is provided for each caveat:

  • Identifier—Each caveat is assigned a unique identifier (ID) with a pattern of CSCxxNNNNN, where x is any letter (a-z) and N is any number (0-9). These IDs are frequently referenced in Cisco documentation, such as Security Advisories, Field Notices and other Cisco support documents. Technical Assistance Center (TAC) engineers or other Cisco staff can also provide you with the ID for a specific caveat.

  • Description—A description of what is observed when the caveat occurs.

Cisco Bug Search Tool

The Cisco Bug Search Tool (BST), which is the online successor to the Bug Toolkit, is designed to improve the effectiveness in network risk management and device troubleshooting. The BST allows partners and customers to search for software bugs based on product, release, and keyword, and aggregates key data, such as bug details, product, and version. The tool has a provision to filter bugs based on credentials to provide external and internal bug views for the search input.

For more information about how to use the Cisco Bug Search Tool effectively, including how to set email alerts for bugs, filter bugs, and save bugs and searches, see the Bug Search Tool Help & FAQ page.

You can access the listed bugs through the BST. This web-based tool provides you with access to the Cisco bug tracking system, which maintains information about bugs and vulnerabilities in the Cisco Mobility Express network solution and other Cisco hardware and software products.

Click the Caveat Identifier number in the table. The corresponding BST page is displayed with details of the bug.


If you are not logged in, you will be redirected to a Log In page where you need to enter your registered username and password to log In. If you do not have a account, you can register for one.

If the defect that you have selected cannot be displayed, this may be due to one or more of the following reasons:

  • The defect number does not exist

  • The defect does not have a customer-visible description yet

  • The defect has been marked Cisco Confidential

Open Caveats

This section lists the open caveats in Cisco Wireless Release and These caveats apply to the current release and may apply to previous releases. A caveat that is open for a prior release and is still unresolved applies to all future releases until it is resolved.

Table 4. Cisco Mobility Express: Open Caveats in Cisco Wireless Release

Caveat Identifier

Caveat Description


Duplicate AP entries are shown on GUI when APs are moved from one group to another


Pre-auth ACLs are not applied to the system for Central Web Auth WLAN


Console idle timeout is not working as expected on AP4800 as Cisco Mobility Express


Conversion from CAPWAP to Cisco Mobility Express is failing. Reload to fix the issue.

Table 5. Cisco Mobility Express: Open Caveats in Cisco Wireless Release

Caveat Identifier

Caveat Description


Cisco Mobility Express: Cisco AP1800 disconnects the client during EAP negotiation with the message MN_REASSOC_TIMEOUT


Wireless client is unable to access Cisco Mobility Express GUI or SSH when the client is connected to the primary AP


Cisco Mobility Express: Cisco AP3802 acting as primary AP crashes due to switchdrvr watchdog reset

Resolved Caveats

This section lists the caveats that have been resolved in Cisco Wireless Release and

Table 6. Cisco Mobility Express: Resolved Caveats in Cisco Wireless Release and

Caveat ID Number



Cisco Mobility Express: Add a checking mechanism to prevent the assignment of the same IP address to the controller and internal AP of the primary AP


SNMP traps are needed for Cisco Mobility Express primary failover


VRRP in Cisco Mobility Express lacks MAC address conflict detection


Cisco Mobility Express crashed with the task name emweb while configuring an invalid RADIUS accounting server


WLAN is disabled after editing it via the Cisco Mobility Express GUI as the PSK assigned to the WLAN is lost


Cisco Mobility Express: Cannot change the role of XOR radio from auto to manual on Cisco AP2802E without DART


Cisco Mobility Express: HEAP memory leak occurs when internal DHCP scopes are used


Cisco Mobility Express: Image upgrade process does not progress and the slave AP stays stuck at Initiated status

Service and Support

For all support-related information, see

Communications, Services, and Additional Information

  • To receive timely, relevant information from Cisco, sign up at Cisco Profile Manager.

  • To get the business impact you’re looking for with the technologies that matter, visit Cisco Services.

  • To submit a service request, visit Cisco Support.

  • To discover and browse secure, validated enterprise-class apps, products, solutions and services, visit Cisco Marketplace.

  • 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.