大家有升级2504碰到过类似的问题嘛！
1、从7.0.220.0升到7.6.120.0,提示升级成功后reboot，用7.6.120.0的IOS进入系统，系统一直停在（启动镜像)这个阶段，无法启动，如下。
WLCNG Boot Loader Version 1.0.16 (Built on Feb 28 2011 at 13:14:54 by cisco)
Board Revision 0.0 (SN: PSZ16440A3A, Type: AIR-CT2504-K9) (W)
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#: A191105254A12j5C7VDr
- Type: Hard Disk
- Capacity: 977.4 MB = 0.9 GB (2001888 x 512)
Press
now to access the Boot Menu...
Loading primary image (7.6.130.0)
100%
36933676 bytes read
Launching...
Launching images...
后来以为7.6.120.0IOS校验有问题，就把backup的IOS也升到了7.6.130.0，结果也是到了启动镜像这里死机，悲剧的是active和
backup镜像都是7.6,两个全部启动不了。都死在这个lauching images。后来就重启按ESC进入boot menu，选择了数字6.
============================================================
Boot Loader Menu
============================================================
1. Run primary image (7.6.130.0) - Active
2. Run backup image (Bad image type)
3. Change active boot image
4. Clear configuration
5. Format FLASH Drive
6. Manually update images
------------------------------------------------------------
Enter selection: 6
Launching...
Launching images...
init started: BusyBox v1.6.0 (2010-05-13 17:50:10 EDT) multi-call binary
Mount failed for selinuxfs on /selinux: No such file or directory
starting pid 655, tty '': '/etc/init.d/rcS'
Use DHCP for ip configuration (Y/n)? n
Enter switch IP address: 10.40.3.2
Enter switch netmask: 255.255.255.0
Enter switch gateway: 10.40.3.1
Enter TFTP server IP address: 10.40.3.3
You have entered:
IP Address : 10.40.3.2
Netmask : 255.255.255.0
Gateway : 10.40.3.1
Server Ip Addr : 10.40.3.3
Is this correct(y/N)? y
!!! WARNING updating using .aes or unapproved files will disable this unit !!!
Do you want to update RTOS (y/N)? y
Do you want to update Primary Or Secondary Image (P/s)? s
Enter filename for RTOS update: AIR-CT2500-K9-7-6-130-0.aes
Enter filename for FP update:
不知道这里的RTOS和FP是什么文件，就直接用了7.6.130.0的镜像试试能不能手工恢复，但是最后升级没成功，导致backup的IOS镜像是bad file type。
有实际操作过的兄弟过，在线等 ，非常 感谢了。如果有遇到的兄弟麻烦加下我的QQ26296016(方也）。在此感谢了。
