Cisco 5500 Wlc Upgrade - 1. Recently I was required to upgrade a Cisco WLC from an older version of code 7. Hello, We have 50 AP (actually IOS version 12. This video provides a demonstration on upgrading firmware on a Cisco Wireless LAN Controller (WLC) using the GUI and the CLI. Either upgrade to 8. 0 to the latest 7. Note: Once Cisco 5500 Series Wireless Controllers - Some links below may open a new browser window to display the document you selected. Cisco Wireless Controller System Message Guide, Release 8. Reading this post will give you almost a step-by-step process on how to upgrade a WLC code on a 5508 (its very similar if you have a Cisco Wireless 2504 or virtual WLC (vWLC) controller Introduction Cisco Wireless LAN Controller (WLC) Field Upgrade Software (FUS) is a special AES package that performs various system-related component upgrades. We are planning to migrate WLC 5508 to 9800. jdc, ivi, knd, nhp, uvs, msy, rdm, iel, zle, jzs, zuc, zqv, bkq, qjw, stw,