Release Notes

19
Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 4.2.176.0
OL-31336-01
Important Notes
802.1X and Microsoft Wireless Configuration Manager
Clients using the Microsoft Wireless Configuration Manager and 802.1X must use WLANs configured
for 40- or 104-bit key length. Configuring for 128-bit key length results in clients that can associate but
not authenticate.
Using the Backup Image
The controller bootloader stores a copy of the active primary image and the backup image. If the primary
image becomes corrupted, you can use the bootloader to boot with the backup image.
With the backup image stored before rebooting, be sure to choose Option 2: Run Backup Image from
the boot menu to boot from the backup image. Then upgrade with a known working image and reboot
the controller.
Home Page Retains Web Authentication Login with IE 5.x
Because of a caching problem in the Internet Explorer 5.x browser, the home page retains the web
authentication login. To correct this problem, clear the history or upgrade your workstation to Internet
Explorer 6.x.
Rogue Location Discovery Protocol (RLDP)
Enabling RLDP may cause access points connected to the controller to lose connectivity with their
clients for up to 30 seconds.
Ad-Hoc Rogue Containment
Client card implementations may mitigate the effectiveness of ad-hoc containment.
Changing the Default Values of SNMP Community Strings
The controller has commonly known default values of “public” and “private” for the read-only and
read-write SNMP community strings. Using these standard values presents a security risk. Therefore,
Cisco strongly advises that you change these values. Refer to the Cisco Wireless LAN Controller
Configuration Guide, Release 4.2 for configuration instructions.
Changing the Default Values for SNMP v3 Users
The controller uses a default value of “default” for the username, authentication password, and privacy
password for SNMP v3 users. Using these standard values presents a security risk. Therefore, Cisco
strongly advises that you change these values. Refer to the Cisco Wireless LAN Controller Configuration
Guide, Release 4.2 for configuration instructions.