Cisco Cisco 4402 Wireless LAN Controller
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Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 4.0.179.8
OL-11101-01
Troubleshooting
Resolved Caveats
These caveats are resolved in operating system release 4.0.179.8:
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CSCsd18145—Unicast ARP handling is not optimized.
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CSCsd39873—Controller reports WEP key decryption error with Intel 2200BG clients.
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CSCsd55009—If an AP1200 is rebooted through a software command while a transaction is taking
place to control the LEDs, the access point may suddenly lose its connection to the controller. When
this occurs, the access point periodically sends out DHCP requests, and its Alarm LED lights.
place to control the LEDs, the access point may suddenly lose its connection to the controller. When
this occurs, the access point periodically sends out DHCP requests, and its Alarm LED lights.
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CSCsd94967—Access points fail to join a controller when the network path MTU setting is
configured for less than 1500 bytes.
configured for less than 1500 bytes.
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CSCse15233—Access point models other than the 1000 series take longer than expected to fail over
to a backup controller when the primary controller fails.
to a backup controller when the primary controller fails.
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CSCse30891—Controllers keep a limit of 8 access point tracking entries for a given client or RFID
tag.
tag.
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CSCse52733—Controllers sometimes reboot when debugs are enabled on the controller and an
access point downloads an image from the controller.
access point downloads an image from the controller.
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CSCse73315—When the controller is upgraded from software release 3.2.150.10 to 4.0.155.5, any
access point group VLAN configuration may be lost.
access point group VLAN configuration may be lost.
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CSCse76478—Controllers sometimes fail to join WCS if the length of the shared secret of the AAA
server is longer than 32 hexadecimal digits.
server is longer than 32 hexadecimal digits.
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CSCse78916—Guest users can be created on controllers with no timeout.
Closed Caveats
This caveat has been closed in operating system release 4.0.179.8.
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CSCsf03352—When you change the 802.11a channel on the root access point (RAP), the channel
changes on the RAP but may not be propagated to the mesh access points (MAPs). As a result, the
MAPs lose connectivity with the controller and never reconnect. This issue may occur if you
upgrade your controller from software release 3.2.x.x to 4.0.155.5 or 4.0.179.8.
changes on the RAP but may not be propagated to the mesh access points (MAPs). As a result, the
MAPs lose connectivity with the controller and never reconnect. This issue may occur if you
upgrade your controller from software release 3.2.x.x to 4.0.155.5 or 4.0.179.8.
Workaround: If you encounter this issue, perform one of the following:
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Erase the controller’s configuration, reconfigure the controller, and allow the MAPs to rejoin
the controller.
the controller.
–
Power-cycle the RAP and MAPs.
Troubleshooting
For the most up-to-date, detailed troubleshooting information, refer to the Cisco TAC website at
Click Product Support > Wireless. Then choose your product and Troubleshooting to find information
on the problem you are experiencing.
on the problem you are experiencing.