Cisco Cisco 2106 Wireless LAN Controller
10
Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 4.1.171.0
OL-12979-01
New and Changed Information
Note
Load-based CAC is supported only on lightweight access points (except the Cisco Airespace
1000 series access points and the Cisco Aironet 1500 series access points, which support
only bandwidth-based CAC). If you enable load-based CAC in a network that contains a
mixture of AP1000s and other lightweight access points, the AP1000s use bandwidth-based
CAC while the other lightweight access points used load-based CAC. If you disable
load-based CAC, all of the access points start using bandwidth-based CAC.
1000 series access points and the Cisco Aironet 1500 series access points, which support
only bandwidth-based CAC). If you enable load-based CAC in a network that contains a
mixture of AP1000s and other lightweight access points, the AP1000s use bandwidth-based
CAC while the other lightweight access points used load-based CAC. If you disable
load-based CAC, all of the access points start using bandwidth-based CAC.
•
Symmetric mobility tunneling—Using this feature, a foreign controller now sends a Layer 3
roaming client’s packet back to its anchor controller through EtherIP tunneling rather than through
a dynamic interface. The source IP address of the packet then becomes the management IP address
of the foreign controller, allowing upstream routers that have reverse path filtering (RPF) to forward
packets rather than discard them because the source IP address of the non-tunneled packet does not
match the router subnet.
roaming client’s packet back to its anchor controller through EtherIP tunneling rather than through
a dynamic interface. The source IP address of the packet then becomes the management IP address
of the foreign controller, allowing upstream routers that have reverse path filtering (RPF) to forward
packets rather than discard them because the source IP address of the non-tunneled packet does not
match the router subnet.
•
Guest N+1 redundancy and mobility failover—Mobility group members can now send ping
requests to one another to check the data and control paths among them to find failed members and
reroute clients. This functionality provides guest N+1 redundancy for guest tunneling and mobility
failover for regular mobility. Guest N+1 redundancy allows detection of failed anchors. Once a
failed anchor controller is detected, all of the clients anchored to this controller are deauthenticated
so that they can quickly become anchored to another controller. This same functionality is also
extended to regular mobility clients through mobility failover. This feature enables mobility group
members to detect failed members and reroute clients.
requests to one another to check the data and control paths among them to find failed members and
reroute clients. This functionality provides guest N+1 redundancy for guest tunneling and mobility
failover for regular mobility. Guest N+1 redundancy allows detection of failed anchors. Once a
failed anchor controller is detected, all of the clients anchored to this controller are deauthenticated
so that they can quickly become anchored to another controller. This same functionality is also
extended to regular mobility clients through mobility failover. This feature enables mobility group
members to detect failed members and reroute clients.
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Workgroup bridge (WGB) support—Cisco Aironet autonomous access points operating in WGB
mode can now associate to Cisco Aironet lightweight access points (except Cisco Airespace AP1000
series access points) to provide an 802.11 wireless connection to wired devices. The WGB is
supported only in client mode and not in infrastructure mode and must run Cisco IOS Release
12.4(3g)JA or later (on 32-MB access points) or Cisco IOS Release 12.3(8)JEB or later (on 16-MB
access points). WGB functionality is not supported for use with hybrid REAP.
mode can now associate to Cisco Aironet lightweight access points (except Cisco Airespace AP1000
series access points) to provide an 802.11 wireless connection to wired devices. The WGB is
supported only in client mode and not in infrastructure mode and must run Cisco IOS Release
12.4(3g)JA or later (on 32-MB access points) or Cisco IOS Release 12.3(8)JEB or later (on 16-MB
access points). WGB functionality is not supported for use with hybrid REAP.
The autonomous WGB access point learns the MAC address of the wired client and then informs the
lightweight access point and controller that the device is operating on the wireless network. This
scenario provides transparent bridging for wired clients and secure roaming.
lightweight access point and controller that the device is operating on the wireless network. This
scenario provides transparent bridging for wired clients and secure roaming.
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High-density networking—High-density networking is introduced in this software release through
the exclusive Cisco and Intel Business Class Wireless Suite Version 2 collaboration. To optimize
wireless LAN capacity and improve overall network performance in dense, multi-cell wireless
networks, this release introduces high-density (or pico cell mode) parameters on the controller.
Using these parameters, you can manually specify global values for receiver sensitivity threshold,
clear channel assessment (CCA) sensitivity threshold, and transmit power values across all Cisco
lightweight access points registered to a given controller. High-density networking is supported on
all Cisco lightweight access points (except the wireless mesh access points) and on notebooks using
the Intel PRO/Wireless 3945ABG and Intel Wireless WiFi Link 4965AG clients.
the exclusive Cisco and Intel Business Class Wireless Suite Version 2 collaboration. To optimize
wireless LAN capacity and improve overall network performance in dense, multi-cell wireless
networks, this release introduces high-density (or pico cell mode) parameters on the controller.
Using these parameters, you can manually specify global values for receiver sensitivity threshold,
clear channel assessment (CCA) sensitivity threshold, and transmit power values across all Cisco
lightweight access points registered to a given controller. High-density networking is supported on
all Cisco lightweight access points (except the wireless mesh access points) and on notebooks using
the Intel PRO/Wireless 3945ABG and Intel Wireless WiFi Link 4965AG clients.
•
Regulatory domain update for Japan—The Japanese regulations allow the regulatory domain that
is programmed into an access point’s radio to be migrated from the -J domain to the -U domain. New
access points for the Japanese market contain radios that are configured for the -P regulatory
domain. -J radios are no longer being sold. In order to make sure that your existing -J radios work
together with the new -P radios in one network, you need to migrate your -J radios to the -U domain.
is programmed into an access point’s radio to be migrated from the -J domain to the -U domain. New
access points for the Japanese market contain radios that are configured for the -P regulatory
domain. -J radios are no longer being sold. In order to make sure that your existing -J radios work
together with the new -P radios in one network, you need to migrate your -J radios to the -U domain.
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Multiple country code support—This release allows you to configure up to 20 country codes per
controller. This multiple-country support enables you to manage access points in various countries
from a single controller. This feature is not supported for use with Cisco Aironet mesh access points.
controller. This multiple-country support enables you to manage access points in various countries
from a single controller. This feature is not supported for use with Cisco Aironet mesh access points.