Cisco Cisco 2106 Wireless LAN Controller

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.

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.

Enabling RLDP may cause access points connected to the controller to lose connectivity with their 
clients for up to 30 seconds.

Client card implementations may mitigate the effectiveness of ad-hoc containment.

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.

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.

SNMP v3 is time sensitive. Make sure that you have configured the correct time and time zone on your 
controller.