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Wireless Clients

Understanding the Cisco Compatible Extensions Program


The Cisco Compatible Extensions Program No-cost licensing of technology for use in WLAN adapters and devices Independent testing to ensure interoperability with Cisco infrastructure

latest innovations Marketing of compliant products by Cisco and product suppliers under

“Cisco Compatible” brand


Cisco Compatible Extensions Program for Wi-Fi Tags

Allows customers with a Cisco Unified Wireless Network and a Cisco location solution to benefit from the latest innovation offered by Cisco technology partners

Offers improved consistency and interoperability among Cisco Compatible Extensions partners

Allows the deployment of tags from different technology partners in the same environment


Cisco Compatible Extensions Explained

John Bartenhagen

Q2Dev: In three boxes, "executes" should be capitalized.


Cisco Compatible Extensions Example: Cisco Centralized Key Management

Cisco Centralized Key Managementallows the wireless infrastructure to cache the credentials, thus removing the need to conduct a fullreauthentication when roaming


Cisco Compatible Extensions Example: AP-Specified Maximum Power

In a heterogeneous environment, a power difference between clients and AP can prevent clients from being heard by the AP. With Cisco Compatible Extensions, the AP can detect and automatically configure the optimal transmit power for the client.


Cisco Compatible Extensions Example: Enhanced Roaming

Ping-pong effect occurs when a wireless client is at the edge of two cells and hops between them. Cisco Compatible Extensions allows the AP to determine “inner regions” where scanning is not required and “outer regions” where the client, about to lose connection, would be allowed to scan for a better AP.


Cisco Compatible Extensions Example: Client Link Test

Client link test allows the AP to query the client for its own reading of the AP signal, and provide a deeper view of the client connection to the network


Cisco Compatible Extensions Example: Client Reporting

Client reporting allows the AP to get information from the client about its various parameters. This allows the administrator to collect data to optimize the network, but also, for example, for the AP to learn where the client would prefer to connect, and to redirect it to the right AP, if it is in range.


Cisco Compatible Extensions Example: Client MFP

When using MFP, client and AP use a key to authenticate management messages, thus making AP impersonation virtually impossible


Cisco Compatible Extensions Features and Versions Summary

v1 v2 v3 v4 v5Security WEP

IEEE 802.1XLEAPCisco TKIP

PEAP-GTCWPA

WPA2EAP-FAST

NAC (wireless)EAT-TLSPEAP-MSCHAP

Management FrameProtection for clients

VLANs and QoS

MultipleSSIDs/VLANson AP

eDCF Wi-Fi Multimedia(WMM)

Voice over IP U-APSDTSPEC CAC Voice metrics

Expedited bandwidthrequest

MobilityAnd Management

AP-assisted roamingCisco Centralized Key Management with LEAPProxy ARP information element

AP-assisted roamingCisco Centralized Key Management with EAP-FASTSingle sign on: LEAP, EAP-FAST

AP-assisted roamingCisco Centralized Key Management with otherEAP typesAP-directed roamingLocationKeep aliveLink test

AP-assisted roamingCisco Centralized Key Management enhancementGratuitous probe ResponseDiagnostic channelAssociationLocation service


Summary

The Cisco Compatible Extensions program allows wireless clients to benefit from Cisco innovations.

Most wireless client hardware and silicon vendors support it. It comprises more than 70 advanced features, such as Cisco

Centralized Key Management, enhanced roaming, wireless IDS, client reporting, and client MFP.

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