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Community Member

Which IOS will it load ?

3750 switch

No boot statement in the config

Configuration register is 0xF

Which IOS do you think this switch will load when it boots?

Directory of flash:/

2 -rwx 4104162 Mar 1 1993 00:03:30 +00:00 c3750-i9-mz.122-20.SE1.bin

3 -rwx 616 Mar 1 1993 00:00:34 +00:00 vlan.dat

5 -rwx 8361 Jan 18 2009 08:29:20 +00:00 config.text

6 drwx 128 Jul 13 2007 15:47:03 +01:00 c3750-ipbasek9-mz.122-37.SE

9 -rwx 1934 Jan 18 2009 08:29:20 +00:00 private-config.text

10 -rwx 9578 Nov 22 2008 03:33:50 +00:00 backup-112108

11 -rwx 1048 Jan 18 2009 08:29:20 +00:00 multiple-fs

Hall of Fame Super Silver

Re: Which IOS will it load ?

Hello Tom,

it should load the image with the lowest file index in flash


note: a config register of 0xF is normal for this switch

Hope to help



Re: Which IOS will it load ?

"it should load the image with the lowest file index in flash"

Tom, Giuseppe is correct and just to add one small thing: this is what they mean when you read in Cisco literature that the "first available IOS" in Flash will be loaded.



Re: Which IOS will it load ?

Do a "show boot" and it should tell you . If its loaded with the image in the "directory" it will have a boot statement and it would have been put there using the archive command which autmatically puts the boot variable in.

Community Member

Re: Which IOS will it load ?


3750 is a fixed configuration switch for which you won't be able to change it's config-register. Moreover, 0xF will load the first IOS in the flash:; which means "c3750-i9-mz.122-20.SE1.bin " in your case.

I am guessing you are getting confused with "drwx 128 Jul 13 2007 15:47:03 +01:00 c3750-ipbasek9-mz.122-37.SE". This is the directory that 3750 creates which can be noticed with "d" infront of that file.

I hope this will help you.


Hall of Fame Super Gold

Re: Which IOS will it load ?

Without a boot statement, I think it will load c3750-i9-mz.122-20.SE1.bin, being that it is the first on the list.

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