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

Note	APs listed under master APs can also function as subordinate APs. The software on the APs listed under master 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

Depending on the master AP in the Cisco Mobility Express network, the maximum number of APs and clients supported varies. For more information about the APs supported in the Cisco Mobility Express network, see Supported Cisco Access Points.

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

For Cisco Mobility Express solution software compatibility information, see the Cisco Wireless Solutions Software Compatibility Matrix.

The following table lists the Cisco Wireless Release 8.9.100.0 and 8.9.111.0 software for Cisco Aironet APs that are Cisco Mobility Express capable (master APs).

Note

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 (master AP) AP software image bundle to be used either for upgrading the Cisco Mobility Express software on the master 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.

For software installation instructions, see the “Getting Started” section in the Cisco Mobility Express User Guide for Release 8.9.

Known Limitations

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

• If you have IPv6 flex ACLs configured in the Cisco Mobility Express network, you may face issues downgrading the Cisco Mobility Express software image from Cisco Wireless Release 8.7.102.0 or newer to Cisco Wireless Release 8.6.101.0 or older.

  This issue can be resolved by removing all IPv6 ACLs as these are not supported in Cisco Mobility Express, Release 8.6.101.0 or older.

• 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.

• Starting from Cisco Mobility Express Release 8.8.111.0, when you set the Security Type for a WLAN to Central Web Auth, the required ACLs are no longer auto-generated. You must create the ACLs manually.

• When downgrading from Cisco Mobility Express AP version 8.8 or 8.9 to version 8.5 with the Cisco Catalyst 3850 switch, the Cisco AP stops responding and fails to come up as a controller. This issue occurs only when downgrading the AP. The AP upgrades without any issues.

• An AP image master requires a minimum memory of 210 MB to create an image. If the memory is below the image creation threshold, an invalid master status is sent to the controller. To avoid this issue, the joining AP must stream the image if there are no other available masters. Another alternative is to add an external AP of the same type, which would have more memory when compared to the internal AP.

• In Cisco Mobility Express, the show boot command displays information that is obtained from the AP. Only when the controller is upgraded and rebooted, the show boot command points to the upgraded version. If the controller is upgraded and not rebooted, the show boot command variables are not populated. It will still show the old image as the default image. This is because, unlike AireOS, Cisco Mobility Express updates its data structures from the information obtained from the internal AP.

• The Cisco Aironet 1852 Access Point does not join Cisco Mobility Express 1562, as the master Cisco Mobility Express1562 does not include the image required for the Cisco Aironet 1852 AP.

• If you continue to perform an upgrade even after all the APs have successfully completed upgrading, the following message is displayed "Transfer cannot happen because download is already Initiated! Abort before initiating the download again".

Caveats

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 8.9.100.0 and 8.9.111.0. 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.