What are the guidelines to follow before performing a wireless LAN controller upgrade?
A. Cisco recommends that the upgrade be performed over a LAN or other high-speed, low-latency link. A very slow network connection might cause TFTP to timeout, and the upgrade will not be successful. Cisco recommends the controller be upgraded only from a tftp daemon on the same segment as the wireless LAN controller when you use TFTP as the transfer mode. When you attempt to upgrade the controller using an associated wireless client as the TFTP or FTP server, the upgrade fails. The wireless LAN controller does not allow a (T)FTP transfer from a daemon that is located on a client associated to an AP joined to the WLC. (See CSCsi73129 for more information.) In addition to these, follow the guidelines documented in the section Guidelines for Upgrading Controller Software of the configuration guide.
Related Questions
- Can I install Lightweight Access Points (LAPs) at a remote office and install a Cisco Wireless LAN Controller (WLC) at my headquarters? Does the LWAPP/CAPWAP work over a WAN?
- Is it possible to go back and make corrections in the wireless LAN controller (WLC) configuration wizard at the time of the initial configuration?
- What is the use of the excessive authentication failure setting in a Wireless LAN Controller (WLC)?
