Cannot boot IOS on Cisco Switch 4948?

[rechard_hk]

Dear All,

Could you let me know how can i fix my issue that i cannot boot IOS, when i reload this switch it go to ROMMON.

I try to uploand IOS but it still has problem. i think i may wrong some point during i did uploand.

This is problem

Switch#sh bootvar

BOOT variable = cat4500-entservicesk9-mz.150-2.SG3.bin,1;bootflash:cat4500-entservicesk9-mz.150-2.SG3.bin,1;bootflash:cat4500-entservicesk9-mz.122-53.SG2_2.bin,12;

CONFIG_FILE variable does not exist

BOOTLDR variable = bootflash:fla

Configuration register is 0x2102

Switch#sh bootflash:

-#- ED ----type---- --crc--- -seek-- nlen -length- ---------date/time--------- name

1   .D image        07861B02 115B02C   41 17936300 Jul 15 2012 20:12:44 +00:00 cat4500-entservicesk9-mz.122-53.SG2_2.bin

42880980 bytes available (17936428 bytes used)

Switch#

could you let me know how to upload IOS on this switch?

Best Regards,

Rechard

[Ivan Shirshin]

Hi,

The first 2 statements in the boot string are incorrect - first is missing the file system and 2nd simply points to non-existing file.

Please change the bootstring and collect the boot sequence logs during the reload (connect via console and enable logging to file):

conf t

     boot system flash bootflash:cat4500-entservicesk9-mz.122-53.SG2_2.bin

     end

wr

show bootvar

reload

Kind Regards,
Ivan

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[Ivan Shirshin]

In regards to loading the new image, there are several ways to do that, e.g. from ROMMON or IOS mode. See the steps for that in this guide:

http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/release/note/OL_9592.html#wp305142

I recommend to boot into IOS file you already have first and then load the one you need to run on the switch, as it is easier comparing to upgrade from ROMMON.

Kind Regards,
Ivan

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