是否可以将 cisco ios 15.x 加载到旧的 2960 或 3560 中？我试图这样做（研究目的）并且它抛出了一个错误。我看到的错误显然与解压缩图像有关，或者至少我看到的是这样。是因为引导加载程序（12.2 版）无法处理新映像吗？如果可以使任何指针起作用，将不胜感激。

以下是 2960 的输出

**Switch#show version**

Cisco IOS Software, C2960 Software (C2960-LANBASE-M), Version 12.2(35)SE5, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Thu 19-Jul-07 20:06 by nachen
Image text-base: 0x00003000, data-base: 0x00D40000

ROM: Bootstrap program is C2960 boot loader
BOOTLDR: C2960 Boot Loader (C2960-HBOOT-M) Version 12.2(25r)SEE1, RELEASE SOFTWARE (fc1)

Switch uptime is 1 minute
System returned to ROM by power-on
System image file is "flash:/c2960-lanbase-mz.122-35.SE5/c2960-lanbase-mz.122-35.SE5.bin"

cisco WS-C2960-24TT-L (PowerPC405) processor (revision D0) with **61440K/4088K** bytes of memory.
Processor board ID FOC1201X3F7
Last reset from power-on
1 Virtual Ethernet interface
24 FastEthernet interfaces
2 Gigabit Ethernet interfaces
The password-recovery mechanism is enabled.

64K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address       : 00:1F:26:E9:83:80
Motherboard assembly number     : 73-10390-04
Power supply part number        : 341-0097-02
Motherboard serial number       : FOC12012A23
Power supply serial number      : AZS115203QK
Model revision number           : D0
Motherboard revision number     : A0
Model number                    : WS-C2960-24TT-L
System serial number            : FOC1201X3F7
Top Assembly Part Number        : 800-27221-03
Top Assembly Revision Number    : B0
Version ID                      : V03
CLEI Code Number                : COM3L00BRB
Hardware Board Revision Number  : 0x01


Switch   Ports  Model              SW Version              SW Image
------   -----  -----              ----------              ----------
*    1   26     WS-C2960-24TT-L    12.2(35)SE5             C2960-LANBASE-M

Configuration register is 0xF

Switch#


**Switch#show flash**

Directory of flash:/

    2  -rwx        1373   Mar 1 1993 00:47:09 +00:00  config.text.old
    3  -rwx    13475840   Mar 1 1993 00:11:07 +00:00  c2960l-universalk9-mz.152-5c.E.bin
    5  -rwx         556   Mar 1 1993 03:00:01 +00:00  vlan.dat
    6  -rwx        1204   Mar 1 1993 02:39:44 +00:00  myconfig.txt
    7  drwx         192   Mar 1 1993 00:06:12 +00:00  c2960-lanbase-mz.122-35.SE5
  626  -rwx           5   Mar 1 1993 00:04:12 +00:00  private-config.text
  628  -rwx        1259   Mar 1 1993 00:04:12 +00:00  config.text

32514048 bytes total (10697728 bytes free)
Switch#

**Switch#dir nvram:**

Directory of nvram:/

   61  -rw-        1259                    <no date>  startup-config
   62  ----           5                    <no date>  private-config

65536 bytes total (64220 bytes free)
Switch#

---------更改引导选项--------

Switch(config)#boot system flash:c2960l-universalk9-mz.152-5c.E.bin**

---------重新启动后-------------

Initializing Flash...
flashfs[0]: 607 files, 19 directories
flashfs[0]: 0 orphaned files, 0 orphaned directories
flashfs[0]: Total bytes: 32514048
flashfs[0]: Bytes used: 21816320
flashfs[0]: Bytes available: 10697728
flashfs[0]: flashfs fsck took 11 seconds.
...done Initializing Flash.
Boot Sector Filesystem (bs) installed, fsid: 3
done.
Loading "flash:c2960l-universalk9-mz.152-5c.E.bin"...uncompress: Unknown mzip segment type: 3

Error loading "flash:c2960l-universalk9-mz.152-5c.E.bin"

Interrupt within 5 seconds to abort boot process.
Loading "flash:/c2960l-universalk9-mz.152-5c.E.bin"...uncompress: Unknown mzip segment type: 3

Error loading "flash:/c2960l-universalk9-mz.152-5c.E.bin"

Interrupt within 5 seconds to abort boot process.
Boot process failed...

The system is unable to boot automatically.  The BOOT
environment variable needs to be set to a bootable
image.