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Cisco 3750 update IOS


wildweaselmi
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Download your image first, then......


An example to backup IOS file to the ftp server


Switch#copy bootflash:cat4000-i9s-mz.122-20.EW.bin ftp://cisco:pass@10.6.56.244





Here is a sample command output to delete a Cisco IOS image (.bin file):

Switch#delete flash:c3750-ipbase-mz.122-25.SED1.bin[/code]






You can verify the available memory in the Flash file system of both switches individually as this example output shows:

Switch#dir flash1: Switch#dir flash2:








Copy the .bin image from the TFTP server to the Flash file system of both switches.

Note: The Automatic Upgrade (auto-upgrade) feature only works with .tar images.

Switch#copy tftp: flash1:Switch#copy tftp: flash2:



ALTERNATIVE...

Many corporate environments don't allow the unsecure TFTP so you could use FTP like this

Switch#copy ftp://cisco:pass@10.6.56.244/c3750-advipservicesk9-mz.122-25.SEE2.bin








Configure the boot variable to boot the switch with the newly copied IOS:


Switch#config t

Switch(config)#boot system switch all flash:/c3750-advipservicesk9-mz.122-25.SEE2.bin

Switch(config)#exit

Switch#write memory



Verify the boot variable:



Switch#show boot



BOOT path-list : flash:/c3750-advipservicesk9-mz.122-25.SEE2.bin



Switch#reload



Switch#show switch



Switch# Role Mac Address Priority State



--------------------------------------------------------



1 Member 0015.63f6.b700 5 Ready



*2 Master 0015.c6c1.3000 10 Ready


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  • 3 years later...

Here is what I do when I upgrade my Cisco 3750 just for something different

dir flash:

!

delete /f /r flash1:c3750-ipbase-mz.122-25.SEB2

!

copy ftp flash

!

dir flash

!

show boot

 BOOT path-list      : flash:c3750-ipbase-mz.122-25.SEB2/c3750-ipbase-mz.122-25.SEB2.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

!

config t

!

boot system switch all flash:c3750-ipservicesk9-mz.122-55.SE6.bin

!

show boot

 BOOT path-list      : flash:c3750-ipservicesk9-mz.122-55.SE6.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

!

copy running-config startup-config

!

reload

!

show version
NOTE: very important to delete old image or during a reload it can grab that image

If you run into issues, plug a console cable into the switch and run the following

flash_init

load_helper

dir flash:

boot flash:c3750-ipservicesk9-mz.122-55.SE6.bin


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