Cisco Aironet 1100 AIR-AP1120B-A-K9 Ficha De Dados

Cisco Systems, Inc.

All contents are Copyright © 1992–2003 Cisco Systems, Inc. All rights reserved. Important Notices and Privacy Statement.

Page 3 of 16

capabilities on IEEE 802.11 clients so that these devices do not need specialized mobile IP client software, resulting

in additional cost-savings. These proxy mobile IP features enable IT professionals to use their existing IP addressing

scheme to cost-effectively design the wireless LAN in a manner more consistent with the wired LAN, while still

maintaining user mobility.

The Cisco Aironet 1100 Series is a key component of the Cisco Structured Wireless-Aware Network (SWAN). Cisco

SWAN is an innovative, comprehensive Cisco framework for deploying, operating, and managing hundreds to

thousands of Cisco Aironet access points using the Cisco infrastructure. Cisco SWAN extends to the wireless LAN

the same level of security, scalability, and reliability that customers have come to expect in their wired LAN by

introducing “wireless-aware” capabilities into the Cisco infrastructure.

Wireless domain services (WDS) is introduced with Cisco SWAN. WDS is a collection of Cisco IOS Software features

that expand WLAN client mobility, simplify WLAN deployment and management and enhance WLAN security.

These services, supported on access points and client devices today and on specific Cisco LAN switches and routers

in 2004, include radio management aggregation, fast secure roaming and WAN link remote site survivability. WDS

radio management aggregation supports radio frequency (RF) managed services such as rogue access point detection,

interference detection and assisted site surveys.

To take advantage of the innovative features of the 1100 Series, not only can Cisco client adapters be used, but now

a wide variety of Cisco Compatible devices are available from leading WLAN client suppliers. For example, fast

secure roaming is supported by the Cisco Aironet 1100 Series in conjunction with Cisco or Cisco Compatible client

devices. With fast secure roaming, authenticated client devices can roam securely from one access point to another

without any perceptible delay during reassociation. Fast secure roaming supports latency-sensitive applications such

as wireless voice over IP (VoIP), enterprise resource planning (ERP), or Citrix-based solutions (Figure 3).

Fast Secure Roaming

Cisco Secure 

Access Control 

(AAA Server)

AP2

AP1

WAN

Router 
Based WDS

Note: Because the WDS handles roaming and reauthentication, the WAN link is not used

1. Access Point (AP1) must now 802.1X authenticate with the
WDS Router to establish a secure session

2. Initial client 802.1X authentication goes to a central
AAA server (~500ms)

3. During a client roam, the client signals to the WDS 
it has roamed and WDS will send the clients key to the 
new Access Point (AP2)

4. The overall roam time is reduced to <150ms, and 
in most cases, <100ms