1、WLC升级需要按照升级路径来操作，低版本到高版本的跨度太大，往往需要升级到中间版本，有时候还涉及到FUS。

2、我们升级，一般使用的笔记本上运行的TFTP/FTP  server。

需要注意：笔记本防火墙的影响。

如下是一个升级的简单示例：

注意，笔记本防火墙因素。
(Cisco Controller) >show wlan summary >>>>>>查看使用的WLAN状态

Number of WLANs.................................. 2

WLAN ID WLAN Profile Name / SSID Status Interface Name
------- ------------------------------------- -------- --------------------
1 TEST / TEST Enabled management
2 HREAP / HREAP Enabled management

(Cisco Controller) >config wlan disable 1 >>>>>>>>先关闭使用的WLAN
(Cisco Controller) >config wlan disable 2
(Cisco Controller) >ping 10.1.1.1 >>>>>>>>测试是否和server能够通信

Send count=3, Receive count=3 from 10.1.1.1

(Cisco Controller) > >>>>>>>>>>选择下载升级文件的模式，可以使用ftp\http\sftp\tftp

(Cisco Controller) >transfer download datatype code >>>>>>>选择下载的数据类型，code代表下载一个可执行的镜像

(Cisco Controller) >transfer download serverip 10.1.1.1 >>>>>>>>配置下载镜像的server地址

(Cisco Controller) >transfer download filename AIR-CT2500-K9-8-2-166-0.aes >>>>>完整填写要下载的文件名

(Cisco Controller) >transfer download path / >>>>>>>填写下载文件的路径，和server在同一根目录，就选择“/”例
如，server在D盘，只需要将文件放在D盘根目录就可以了
(Cisco Controller) >transfer download start >>>>>>>>开始传输下载

Mode............................................. TFTP
Data Type........................................ Code
TFTP Server IP................................... 10.1.1.1
TFTP Packet Timeout.............................. 6
TFTP Max Retries................................. 5
TFTP Path........................................ /
TFTP Filename.................................... AIR-CT2500-K9-8-2-166-0.aes

This may take some time.
Are you sure you want to start? (y/N) y

TFTP Code transfer starting.

TFTP receive complete... extracting components.

Checking Version Built.

Image version check passed.

Writing new RTOS to flash disk.

Writing new FP to flash disk.

Writing new AP Image Bundle to flash disk.

Executing fini script.

File transfer is successful.
Reboot the controller for update to complete.
Optionally, pre-download the image to APs before rebooting to reduce network downtime.

(Cisco Controller) >reset system

The system has unsaved changes.
Would you like to save them now? (y/N) y

Configuration Saved!
System will now restart! Creating license client restartability thread

Updating license storage ... Done.

Exit Called
Switchdrvr exited!
Restarting system.

WLCNG Boot Loader Version 1.0.20 (Built on Jan 14 2014 at 11:40:45 by cisco)
Board Revision 0.0 (SN: PSJ15320AXR, Type: AIR-CT2504-K9) (P)

Verifying boot loader integrity... OK.

OCTEON CN5230C-SCP pass 2.0, Core clock: 750 MHz, DDR clock: 330 MHz (660 Mhz data rate)
CPU Cores: 4
DRAM: 1024 MB
Flash: 32 MB
Clearing DRAM........ done
Network: octeth0', octeth1, octeth2, octeth3
' - Active interface
E - Environment MAC address override
CF Bus 0 (IDE): OK
IDE device 0:
- Model: 1GB CompactFlash Card Firm: CF B612J Ser#: C321101091A1YB4BJK55
- Type: Hard Disk
- Capacity: 977.4 MB = 0.9 GB (2001888 x 512)

Press <ESC> now to access the Boot Menu...

Loading primary image (8.2.166.0)
100%

36881019 bytes read
Launching...
Launching images...
init started: BusyBox v1.6.0 (2010-05-13 17:50:10 EDT) multi-call binary
starting pid 690, tty '': '/etc/init.d/rcS'
Decompressing... OK
Validating...... OK
Detecting Hardware ...
Installing ether-pow driver - 0x6008
starting pid 907, tty '/dev/ttyS0': '/usr/bin/gettyOrMwar'
Setting up ZVM
Exporting LD_LIBRARY_PATH

Cryptographic library self-test....
Testing SHA1 Short Message 1
Testing SHA256 Short Message 1
Testing SHA1 Short Message 1
SHA1 POST PASSED
passed!

XML config selected
Validating XML configuration
octeon_device_init: found 1 DPs
/dev/fpga: No such device or address
readCPUConfigData: cardid 0x6060001
Node ptr_apfCfgData.apfVAPIDData.dot11rFtSupport value = 2 is out of range for min = 0 and max = 1
Validation for node ptr_apfCfgData.apfVAPIDData.dot11rFtSupport failed, indices for node are 1
Node ptr_apfCfgData.apfVAPIDData.dot11rFtSupport value = 2 is out of range for min = 0 and max = 1
Validation for node ptr_apfCfgData.apfVAPIDData.dot11rFtSupport failed, indices for node are 2
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Software Copyright Cisco Systems, Inc. All rights reserved.

Cisco AireOS Version 8.2.166.0
Firmware Version PIC 15.0

Initializing OS Services: ok
Initializing Serial Services: ok
Initializing Network Services: ok
Initializing Licensing Services: ok

License daemon start initialization.....
Starting Statistics Service: ok

License daemon running.....
Starting Licensing Services: ok
Starting ARP Services: ok
Starting Trap Manager: ok
Starting Network Interface Management Services: ok
Starting System Services: ok
Starting FIPS Features: ok : Not enabled
Starting SNMP services: ok
Starting Fastpath Hardware Acceleration: ok
Starting Fastpath Console redirect : ok
Starting Fastpath DP Heartbeat : ok
Fastpath CPU0.00: Starting Fastpath Application. SDK-1.8.0, build 269. Flags-[DUTY CYCLE] : ok
Fastpath CPU0.00: Initializing last packet received queue. Num of cores(2)
Fastpath CPU0.00: Init MBUF size: 1856, Subsequent MBUF size: 2040
Fastpath CPU0.00: Core 0 Initialization: ok
Fastpath CPU0.00: Initializing Timer...
Fastpath CPU0.00: Initializing Timer...done.
Fastpath CPU0.00: Initializing Timer...
Fastpath CPU0.00: Initializing NBAR AGING Timer...done.
Fastpath CPU0.01: Core 1 Initialization: ok
Starting Switching Services: ok
Starting QoS Services: ok
Starting Policy Manager: ok
Starting Data Transport Link Layer: ok
Starting Access Control List Services: ok
Starting System Interfaces: ok
Starting Client Troubleshooting Service: ok
Starting Certificate Database: ok
Starting VPN Services: ok
Starting Management Frame Protection: ok
Starting DNS Services: ok
Starting Redundancy: ok
Start rmgrPingTaskok
Starting LWAPP: ok
Starting CAPWAP: ok
Starting LOCP: ok
Starting Security Services: ok
Starting Policy Manager: ok
Starting Authentication Engine: ok
Starting Mobility Management: ok
Starting Ethernet-over-IP: ok
Starting Capwap Ping Component: ok
Starting AVC Services: ok
Starting AVC Flex Services: ok
Starting Virtual AP Services: ok
Starting AireWave Director: ok
Starting Network Time Services: ok
Starting Cisco Discovery Protocol: ok
Starting Broadcast Services: ok
Starting Logging Services: ok
Starting DHCP Server: ok
Starting IDS Signature Manager: ok
Starting RFID Tag Tracking: ok
Starting RF Profiles: ok
Starting Power Supply and Fan Status Monitoring Service: ok
Starting Mesh Services: ok
Starting TSM: ok
Starting CIDS Services: ok
Starting Ethernet-over-IP: ok
Starting DTLS server: enabled in CAPWAP
Starting CleanAir: ok
Starting WIPS: ok
Starting SSHPM LSC PROV LIST: ok
Starting RRC Services: ok
Starting SXP Services: ok
Starting Alarm Services: ok
Starting FMC HS: ok
Starting IPv6 Services: ok
Starting Config Sync Manager : ok
Starting Hotspot Services: ok
Starting Tunnel Services New: ok
Starting Portal Server Services: ok
Starting mDNS Services: ok
Starting Management Services:
Web Server: CLI: Secure Web: ok

(Cisco Controller)

Enter User Name (or 'Recover-Config' this one-time only to reset configuration to factory defaults)

User: cisco123
Password:***************
(Cisco Controller) >