Clearing boot variables

[donalcox]

Hi,

I am trying to clean up boot variables but I am unable to do so despite using the no boot system switch or no boot system flash command

BOOT variable = flash:/flash:cat3k_caa-universalk9ldpe.16.12.12.SPA.bin;flash:cat3k_caa--universalk9ldpe.16.12.12.SPA.conf;flash:packages.conf;

Here is the boot variable I want it to only say flash:packages.conf

Using the no command to tidy up does not work so wondering how I can do this. On boot it looks for the first bin file and the conf file and comes up with error file not found - however it does go on ahead and boot as the packages.conf works.

Any help much appreciated in advance - thank you.

[Flavio Miranda]

@donalcox 

 no boot system switch all

boot system flash:packages.conf

[donalcox]

Thanks @Flavio Miranda 
I tried that but variable was still there after doing that
So I seen that those commands were in running config. i.e boot system flash:/flash:cat3k_caa-universalk9ldpe.16.12.12.SPA.bin and boot system flash:cat3k_caa--universalk9ldpe.16.12.12.SPA I just did not statement against those in global config
Then they went away and all good - you steered me in the right direction though - thanks.

[Leo Laohoo]

---

@donalcox wrote:
I tried that but variable was still there after doing that

---

After clearing the boot variable statement in config mode, if the config is not saved, the boot variable statement will remain unchanged. 

conf t
 no boot system switch all
end
wr

[Gregory.Fields]

It depends on the IOS or switch.   The correct command is:
conf t
no boot system
end
wr 
note: you do not need to add anything else see options below:
SWITCH(config)#no boot system ?
bootflash: System image file
flash: System image file
ftp: System image file
http: System image file
sftp: System image file
tftp: System image file
<cr> <cr>