Switch configuration erased automatically

Unanswered Question
Jan 4th, 2010


Last day my Cisco 4507 switch configuration got erased completely. Even startup configuration was blank.  The show version output is shown below.

JEDFOBCF0SW01#sh ver
Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500-ENTSERVICESK9-M),
Version 12.2(40)SG, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Wed 07-Nov-07 18:00 by prod_rel_team
Image text-base: 0x10000000, data-base: 0x11ADF0B8

ROM: 12.2(31r)SGA1
Dagobah Revision 226, Swamp Revision 32

JEDFOBCF0SW01 uptime is 2 weeks, 2 days, 13 hours, 32 minutes
Uptime for this control processor is 2 weeks, 2 days, 13 hours, 32 minutes
System returned to ROM by power-on
System image file is "bootflash:cat4500-entservicesk9-mz.122-40.SG.bin"

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cisco WS-C4507R-E (MPC8245) processor (revision 14) with 524288K bytes of memory
Processor board ID FOX1217G8TA
MPC8245 CPU at 333Mhz, Supervisor IV
Last reset from PowerUp
18 Virtual Ethernet interfaces
22 Gigabit Ethernet interfaces
403K bytes of non-volatile configuration memory.

Configuration register is 0x2101


Kindly help on identifying the problem.

I have this problem too.
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pompeychimes Wed, 01/06/2010 - 06:47

Correct, it would not.

Did you lose power to the switch recently? Does anybody else have access to the switch and could they have erased it?

sudhanshu.gupta... Thu, 01/07/2010 - 04:21

Thanks a lot for your reply. There was a lose of power just before the problem. Also since the switch is connected to raw power, this happens often. Kindly tell me whether this will create a problem. This is first time i faces this problem. No one has access of this switch other than me and hence no one could have erased.

Kindly share me any doc or bug id which can cause configuration erase because of power problem

sudhanshu.gupta... Sat, 01/09/2010 - 00:45


Kindly share the reason , if any one knows, why switch configuration is getting erased after power cycle

Tharak Abraham Mon, 01/11/2010 - 04:18


Did you or any other Engrs introduce a new Cisco switch in the domain somewhere ?

I mean this is a really basic thing that ppl come across when introducing a new switch in the domain without checking the config revision no.

Pls ignore if this is not the case or if you did a downgrage of IOS on the other hand.



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