如何判斷WLC的FUS版本

有些時候，我們在升級WLC的時候，被告知需要升級WLC的FUS，以防止某些漏洞和不必要的情況發生。

1、什么是FUS？

Field Upgrade Software (FUS)，翻譯過來，叫“現場升級軟件”，這叫起來太別扭了，也不和中文語境，還是不翻譯的得好。

簡單的說，FUS就是FUS是一種特殊的AES包，可執行各種與系統相關的組件升級。 我們建議您安裝FUS映像，以將引導加載程序（bootloader），現場恢復映像（field recovery image），FPGA / MCU和其他固件等組件升級到最新版本。

2、如何判斷FUS是什么版本？

如下表中所列出的是FUS 1.9 下，各組件的版本情況：

Cisco WLC Platform	Upgraded Components
Cisco 2500 Series Wireless LAN Controllers	Field Recovery Image is upgraded from 7.0.112.21 to 7.6.101.1 Bootloader is upgraded to 1.0.20 Offline Field Diagnostics is upgraded from 0.9.28 to 0.9.35
Cisco 5500 Series Wireless LAN Controllers	Field Recovery Image is upgraded from 7.0.112.21 to 7.6.101.1 Bootloader is upgraded to 1.0.20 Offline Field Diagnostics is upgraded from 0.9.28 to 0.9.35 FPGA Revision version is upgraded to 1.7 Environment Controller (MCU) Image version is upgraded to 1.8 USB Console Revision version is upgraded to 2.2
Cisco Wireless Services Module 2 (WiSM2)	Field Recovery Image is upgraded from 7.0.112.21 to 7.6.101.1 Bootloader is upgraded to 1.0.20 Offline Field Diagnostics is upgraded from 0.9.28 to 0.9.35 USB Console Revision version is upgraded to 2.2 Note Due to a software issue, the FPGA does not get upgraded in a Cisco WiSM2 even though the console output indicates that it has been upgraded.
Cisco Flex 7500 Series Wireless LAN Controllers	RAID firmware

如下表中所列出的是FUS 2.0 下，各組件的版本情況：

Cisco Wireless Controller Platform	Upgraded Components
Cisco 2504 Wireless Controllers	An upgrade to FUS 2.0 is mandatory if you have PIC 1.0.19 due to CSCuu46671 ; if you do not have PIC 1.0.19, it is mandatory to upgrade to FUS 1.9 or 2.0 before upgrading to AireOS release 8.3.121.0 or above. Bootloader Version is upgraded to 1.0.20 Note Verify the bootloader version by entering the command show sysinfo. The output displays the following line only if FUS 2.0 is installed. Bootloader Version................... 1.0.20 Cisco WLCs with PIC version older than 1.0.18 will not show PIC update when upgraded to FUS 2.0
Cisco Flex 7510 Wireless Controllers	Emergency image is upgraded to 8.1.133.7 Updates RAID firmware to 20.13.1-0200
Cisco 8510 Wireless Controllers	Emergency image is upgraded to 8.1.133.7 Updates RAID firmware to 20.13.1-0200

注意：2.0版本沒有Cisco 5508,5520和8540無線控制器和Cisco WiSM2的更新。

3、關於升級FUS

• FUS被隨WLC 6.0版本之后一同安裝。
• FUS只能安裝一次。
• 在升級FUS的時候，不需要Console接入，但是，最好還是有Console的接入權限以使得查看整個安裝進度。
• FUS升級過程會多次重啟WLC，整個過程大約需要30分鍾。
• 為FLEX7510控制器平台安裝FUS后，還會升級RAID固件。在安裝過程中，顯示的控制台消息會指示RAID固件的升級。但是，無法通過輸入命令或查看引導日志來驗證RAID固件升級。
• 注意升級過程中，不要讓控制器斷電，否則會變磚。

升級命令：大致和WLC image升級一樣，GUI的就不用介紹了，簡單列舉一下CLI的命令。

a. transfer download datatype code

b. transfer download serverip serverip

c. transfer download mode { tftp | ftp }

d. transfer download username user  <<<選擇TFTP不需要使用user/password

e. transfer download password password

f. transfer download filename filename.aes

g. transfer download path /

h. transfer download start

文件名字，如WLC5508的：AIR-CT5500-K9-1-9-0-0-FUS.aes

當文件上傳完畢之后，重啟WLC。

reset system

 

 

關於更詳細的說明：參考思科官方文檔。

https://www.cisco.com/c/en/us/td/docs/wireless/controller/release/notes/fus_rn_OL-31390-01.html