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c3750 IOS upgrade


not sure if this is the right place for this problem, but i'd be very much obliged if i can get the help i need. Yesterday, i upgraded the IOS image on my 3750 switch, and scheduled the reload to take place at midnight, but only for me to get to the office today and find out that it's still running the old image. Was there something i didnt do right? Please find below the old and new image, and so show commands i pasted:


Cisco Internetwork Operating System Software

IOS (tm) C3750 Software (C3750-I9-M), Version 12.2(20)SE4, RELEASE SOFTWARE (fc1)

Copyright (c) 1986-2005 by cisco Systems, Inc.

Compiled Sun 09-Jan-05 00:09 by antonino

Image text-base: 0x00003000, data-base: 0x0099748C

ROM: Bootstrap program is C3750 boot loader

BOOTLDR: C3750 Boot Loader (C3750-HBOOT-M) Version 12.2(25r)SEA, RELEASE SOFTWARE (fc)

Tunwells_Cat uptime is 24 minutes

System returned to ROM by power-on

System restarted at 08:54:32 BST Tue May 1 2007

System image file is "flash:c3750-i9-mz.122-20.SE4/c3750-i9-mz.122-20.SE4.bin"

cisco WS-C3750-24P (PowerPC405) processor (revision F0) with 118784K/12280K bytes of memory.

Processor board ID CAT0915Z0JP

Last reset from power-on

3 Virtual Ethernet/IEEE 802.3 interface(s)

24 FastEthernet/IEEE 802.3 interface(s)

2 Gigabit Ethernet/IEEE 802.3 interface(s)

The password-recovery mechanism is enabled.

512K bytes of flash-simulated non-volatile configuration memory.

Base ethernet MAC Address : 00:13:C3:E6:A9:80

Motherboard assembly number : 73-9672-06

Power supply part number : 341-0029-03

Motherboard serial number : CAT091406DR

Power supply serial number : DTH09115PKN

Model revision number : F0

Motherboard revision number : A0

Model number : WS-C3750-24PS-S

System serial number : CAT0915Z0JP

Top Assembly Part Number : 800-25860-02

Top Assembly Revision Number : A0

Version ID : V03

CLEI Code Number : CNMV1K0CRB

Hardware Board Revision Number : 0x01

Switch Ports Model SW Version SW Image

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

* 1 26 WS-C3750-24P 12.2(20)SE4 C3750-I9-M

The new image is


Thanks in advance.


Re: c3750 IOS upgrade


Did you add a new boot statement pointing to the new IOS.


"boot bootflash:c3750-advipservicesk9-mz.122-25.SEE2.bin "

HTH, please rate if it does help,

Mohammed Mahmoud.

Community Member

Re: c3750 IOS upgrade

I'll try this out before the end of the day.

Do i need to add the boot before the flash i.e boot bootflash: (as opposed to boot flashh:)


Re: c3750 IOS upgrade


Ok, then 100% this was your problem, as when the switch boots, if there is no boot command it uses the first image it founds in flash, which was in your case the old one.

yes the command syntax is "boot :"

note that the device here is the device where you've installed your new IOS, it may be the bootflash: or slot0: or disk0:.

And don't forget to save your configuration.

HTH, please rate if it does help,

Mohammed Mahmoud.

Community Member

Re: c3750 IOS upgrade

Thanks. I'll keep you posted as soon as this is done.

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