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Rockwell Automation Publication 1783-UM006A-EN-P - May 2014
Chapter 13
Configuring WDS, Fast Secure Roaming, Radio Management, and Wireless Intrusion Detection Services
When you configure your wireless LAN for fast, secure roaming, however,
LEAP-enabled client devices roam from one access point to another without
involving the main RADIUS server. Using Cisco Centralized Key Management
(CCKM), a device configured to provide Wireless Domain Services (WDS)
takes the place of the RADIUS server and authenticates the client so quickly that
there is no perceptible delay in voice or other time-sensitive applications. This
figure shows client authentication by using CCKM.
Figure 98 - Client Reassociation by Using CCKM and a WDS Access Point
The WDS device maintains a cache of credentials for CCKM-capable client
devices on your wireless LAN. When a CCKM-capable client roams from one
access point to another, the client sends a reassociation request to the new access
point, and the new access point relays the request to the WDS device.
The WDS device forwards the client’s credentials to the new access point, and
the new access point sends the reassociation response to the client. Only two
packets pass between the client and the new access point, greatly shortening the
reassociation time. The client also uses the reassociation response to generate the
unicast key. Refer to the
Configuring Fast Secure Roaming on page 393
for
instructions on configuring access points to support fast, secure roaming.
103569
Reassociation request
Reassociation response
Pre-registration request
Pre-registration reply
Roaming client
device
Access point
Access point or switch
providing Wireless
Domain Services
Authentication server
Wired LAN
WDS
Содержание 1783-WAPAK9
Страница 240: ...240 Rockwell Automation Publication 1783 UM006A EN P May 2014 Chapter 6 Administering the WAP Access Notes...
Страница 300: ...300 Rockwell Automation Publication 1783 UM006A EN P May 2014 Chapter 8 Configuring Multiple SSIDs Notes...
Страница 440: ...440 Rockwell Automation Publication 1783 UM006A EN P May 2014 Chapter 14 Configuring RADIUS and TACACS Servers Notes...
Страница 456: ...456 Rockwell Automation Publication 1783 UM006A EN P May 2014 Chapter 15 Configuring VLANs...
Страница 476: ...476 Rockwell Automation Publication 1783 UM006A EN P May 2014 Chapter 16 Configuring QoS Notes...
Страница 482: ...482 Rockwell Automation Publication 1783 UM006A EN P May 2014 Chapter 17 Configuring Filters...
Страница 489: ...Rockwell Automation Publication 1783 UM006A EN P May 2014 489 Configuring Filters Chapter 17...
Страница 520: ...520 Rockwell Automation Publication 1783 UM006A EN P May 2014 Chapter 19 Configuring SNMP Notes...
Страница 572: ...572 Rockwell Automation Publication 1783 UM006A EN P May 2014 Chapter 21 Troubleshooting Notes...
Страница 578: ...578 Rockwell Automation Publication 1783 UM006A EN P May 2014 Appendix A Protocol Filters Notes...
Страница 594: ...594 Rockwell Automation Publication 1783 UM006A EN P May 2014 Appendix C Error and Event Messages Notes...
Страница 600: ...600 Rockwell Automation Publication 1783 UM006A EN P May 2014 Glossary Notes...
Страница 610: ...610 Rockwell Automation Publication 1783 UM006A EN P May 2014 Index Notes...
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