In 3750 switch can't able to set two boot system file

[mashokece1989]

In my 3750 while i check in running config i can able to see 

!
boot-start-marker
boot-end-marker
!

but when i try to configure two ios using boot system command , after given the command one IOS only taken in output 

*************#sh boot
BOOT path-list : flash:c3750e-universalk9-mz.122-55.SE8.bin
Config file : flash:/config.text
Private Config file : flash:/private-config.text
Enable Break : no
Manual Boot : no
HELPER path-list :
Auto upgrade : yes
Auto upgrade path :
NVRAM/Config file
buffer size: 524288
Timeout for Config
Download: 0 seconds
Config Download
via DHCP: disabled (next boot: disabled)

!
boot-start-marker
boot-end-marker
!

what is the issue ? why that both IOS not showed in Boot start and boot end marker ?

please suggest the solution 

[Leo Laohoo]

what is the issue ? why that both IOS not showed in Boot start and boot end marker ?

Catalyst 2K & 3K switch do not support "boot-start-marker".  

This means the switch will only boot one specified IOS.  If the specified IOS cannot be read then the switch will boot the first IOS file found in the flash, from top to bottom.  If the IOS cannot be read then the switch will go into ROMmon.

This is how it works.

[mashokece1989]

Hi Leo Laohoo,

Thanks for your suggestion, everything this clear but i have one confusion, If its not support "Boot-start-marker"then why its showing in "Show running" command

#sh runn

!
boot-start-marker
boot-end-marker
!

[Leo Laohoo]

Thanks for your suggestion, everything this clear but i have one confusion, If its not support "Boot-start-marker"then why its showing in "Show running" command

Who knows.