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Cisco Cius Support for Cisco Compatible Extensions Features
The Cisco Compatible Extensions program ensures the widespread availability of client devices that are
interoperable with a Cisco WLAN infrastructure and take advantage of Cisco innovations for enhanced security,
rich media mobility, quality of service, and network management. The Cisco Cius tablet is similar to leading smart
(dual-mode) phones in that it is optimized to work with a Cisco Wireless LAN (WLAN) infrastructure, supporting the
latest WLAN standards and Cisco innovations. Some of the highlights of the Cisco Compatible Extensions
specifications are access point assisted roaming with fast 802.1x re-authentication, management frame protection,
unscheduled automatic power save delivery, and location awareness.
Cisco Cius takes advantage of advanced features provided by Cisco Compatible Extensions to reduce roaming
time, especially when the user is moving and in an active call or data connection. By supporting 802.1x Cisco
Centralized Key Management (CCKM) with Wi-Fi Protected Access 2 (WPA2), Cius has superior roaming
performance between Wi-Fi access points in the same network, with an average of 70 ms roam time in most
deployments. A large delay in roaming manifests as voice gaps or clicking sounds as the non Cisco Compatible
Extensions clients roam from one access point to another. This feature also reduces processing on authentication
servers related to Wi-Fi roaming.
In addition, as part of the Cisco Compatible Extensions Version 5 specifications, management frame protection
(MFP) protects against network disruption caused by malicious systems that forge disassociation or de-
authentication requests. Cisco Wireless LAN infrastructure protects management frames transmitted when Cius is
associated and authenticated. Non-protected WLANs can send management information in unprotected frames,
which makes them vulnerable to attack.
Table 1 provides a short list of the top Cisco Compatible Extensions features supported by Cisco Cius tablets.
Table 1.
Cisco Compatible Extensions Features Supported by Cisco Cius
Version 4
Specifications
Specifications
Cisco Compatible Extensions Features
Benefits
Cius Support
S50
CCKM support for Extensible Authentication
Protocol (EAP) types
Protocol (EAP) types
Locally cached credentials means faster roams
Yes
S55
Unscheduled Automatic Power Save Delivery
(U-APSD)
(U-APSD)
More channel capacity and better battery life
Yes
S54
TSPEC-based Call Admission Control (CAC)
Managed call capacity for roaming and emergency
calls
calls
No (Use Session
Initiation Protocol
[SIP] CAC)
Initiation Protocol
[SIP] CAC)
S56
Voice Traffic Stream Metrics (TSM)
Better and more informed troubleshooting
Downlink only
S51
Neighbor List
(Cisco RRM-based)
(Cisco RRM-based)
Reduced client channel scanning, resulting in faster
roaming and better battery life
roaming and better battery life
Yes
S31
Dynamic Transmit Power Control (DTPC)
Improved battery life by clients learning their
transmit power level from the access point
transmit power level from the access point
Yes
S32
Assisted Roaming
Faster Layer 2 roams
Client managed