Cisco Cisco Prime Network Control System Appliance 백서

 

 

© 2011 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. 

Page 2 of 7 

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. 

Cisco Compatible Extensions Features Supported by Cisco Cius 

CCKM support for Extensible Authentication 
Protocol (EAP) types 

Locally cached credentials means faster roams 

Yes 

Unscheduled Automatic Power Save Delivery 
(U-APSD) 

More channel capacity and better battery life 

Yes 

TSPEC-based Call Admission Control (CAC) 

Managed call capacity for roaming and emergency 
calls 

No (Use Session 
Initiation Protocol 
[SIP] CAC) 

Voice Traffic Stream Metrics (TSM) 

Better and more informed troubleshooting 

Downlink only 

Neighbor List  
(Cisco RRM-based) 

Reduced client channel scanning, resulting in faster 
roaming and better battery life 

Yes 

Dynamic Transmit Power Control (DTPC) 

Improved battery life by clients learning their 
transmit power level from the access point 

Yes 

Assisted Roaming 

Faster Layer 2 roams 

Client managed