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Release Notes

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Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 4.2.176.0
OL-31336-01
Caveats
• CSCsr83307—A configuration file that is uploaded with an encryption key can be downloaded
without the encryption key.
Workaround: None.
• CSCsr83671—The auto-RF feature on a Cisco WiSM or 4400 series controller sets 1130 and 1240
series access points to channel 36 for the 5-GHz band (802.11a).
Workaround: Follow these steps to work around the issue:
a. To change the sensitivity level, enter this command:
config advanced 802.11a channel dca sensitivity high
b. To save your changes, enter this command:
save config
c. To verify your changes, enter this command:
show advanced 802.11a channel
Information similar to the following appears:
DCA Sensitivity Level: ...................... HIGH (5 dB)
• CSCsr83684—When link aggregation (LAG) is enabled, the source MAC address for dynamic
interfaces might change during operation.
Workaround: None.
• CSCsr89399—Cisco 1131AG access points that are connected to Cisco WiSM controllers might
reboot unexpectedly.
Workaround: None.
• CSCsr89694—On Cisco WiSM controllers running software release 4.2.130.0, trap logs are
generated indicating that the control path between two random mobility members is down. About
10 to 20 minutes later the control path comes back up.
Workaround: None.
• CSCsr89894—If a client roams from one controller to another and then powers down or leaves the
RF range, the client entry on the first (anchor) controller is not deleted even though the client entry
on the second (foreign) controller is deleted correctly.
Workaround: Manually delete the client entry from the anchor controller.
• CSCsr97377—Roaming latency might be high (around 300 ms) when 802.11n 5-GHz clients are
using WPA2-PEAP with AES on the 40-MHz channel.
Workaround: None.
• CSCsu00583—Roaming latency might be high (around 200 ms) when 802.11n 2.4-GHz clients are
using 802.11g default data rates.
Workaround: None.
• CSCsu03464—The input radio statistics are incorrect on a 1250 series access point running software
release 4.2.173.0.
Workaround: None.
• CSCsu04143—The radio resource management (RRM) process on the controller can start allocating
all available timers, until the controller is unable to register new timers for other processes.
Workaround: Reset the controller.