12-03-2013 07:57 AM - edited 03-07-2019 04:54 PM
Hi
I have an old 1760 router with Password Recovery Functionality Disabled
I don't care about its actual configuration , I need factory reset
I Followed the well documented procedure :
Normal boot
Self decompressing the image : ################################################# ################################################################################ ################################################################ [OK]
Smart Init is disabled. IOMEM set to: 15
PMem allocated: 57042944 bytes; IOMem allocated: 10065920 bytes
Restricted Rights Legend
Use, duplication, or disclosure by the Government is
subject to restrictions as set forth in subparagraph
(c) of the Commercial Computer Software - Restricted
Rights clause at FAR sec. 52.227-19 and subparagraph
(c) (1) (ii) of the Rights in Technical Data and Computer
Software clause at DFARS sec. 252.227-7013.
cisco Systems, Inc.
170 West Tasman Drive
San Jose, California 95134-1706
Cisco Internetwork Operating System Software
IOS (tm) C1700 Software (C1700-SV8Y7-M), Version 12.3(6d), RELEASE SOFTWARE (fc1
)
Copyright (c) 1986-2004 by cisco Systems, Inc.
Compiled Fri 15-Oct-04 03:46 by kellythw
Image text-base: 0x80008120, data-base: 0x81440804
Send break at this time , then :
Do you want to reset the router to factory default
configuration and proceed [y/n] ? y
Reset router configuration to factory default.
cisco 1760 (MPC860P) processor (revision 0x500) with 55706K/9830K bytes of memor
y.
Processor board ID FOC07450X9P (3881152211), with hardware revision 0000
MPC860P processor: part number 5, mask 2
Bridging software.
X.25 software, Version 3.0.0.
1 FastEthernet/IEEE 802.3 interface(s)
32K bytes of non-volatile configuration memory.
32768K bytes of processor board System flash (Read/Write)
WARNING:
Executing this command will disable password recovery mechanism.
Do not execute this command without another plan for
password recovery.
Are you sure you want to continue? [yes/no]: y
The router boot up normally anyway , still with original password unrecovered instead a fresh factory default.
Any hint please ?????
Thank you
12-03-2013 03:01 PM
Recovering a Router with the Password Recovery Service Disabled
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12-03-2013 10:39 PM
That was exactly the document I read to reset the router to factory default
The problem is that after this phrase appears :
Do you want to reset the router to factory default configuration and proceed [y/n] ? y Reset router configuration to factory default.
The router continues boot with the old configuration and the factory reset doesn't take place
Any idea why ???
Thanks
12-03-2013 10:45 PM
The router continues boot with the old configuration and the factory reset doesn't take place
If you can break in and do password recovery, delete the old config.
12-03-2013 11:03 PM
I mean the router still boot with old configuration AND the password recovery disabled.
So, no way to break it
I don't understand why the whole thing is wiped out after it says " Reset router to factory default" like all other routers do (i wiped many cisco with password recovery disabled)
12-03-2013 11:05 PM
I mean the router still boot with old configuration AND the password recovery disabled.
Hmmmm ... That's bizarre.
I've used the same process several times and I've been able to remove previous configurations.
12-04-2013 12:32 AM
Federico,
There is something quite strange going on but one thing has caught my attention in particular. This is a part of your transcript:
Send break at this time , then :
Do you want to reset the router to factory default
configuration and proceed [y/n] ? y
Reset router configuration to factory default.
cisco 1760 (MPC860P) processor (revision 0x500) with 55706K/9830K bytes of memory.
Processor board ID FOC07450X9P (3881152211), with hardware revision 0000
MPC860P processor: part number 5, mask 2
Bridging software.
X.25 software, Version 3.0.0.
1 FastEthernet/IEEE 802.3 interface(s)
32K bytes of non-volatile configuration memory.
32768K bytes of processor board System flash (Read/Write)
WARNING:
Executing this command will disable password recovery mechanism.
Do not execute this command without another plan for
password recovery.
Are you sure you want to continue? [yes/no]: y
Notice that the first question is whether you want to erase the configuration - you respond with yes, and the router continues booting. The second question displayed clearly shows that the router continues loading the configuration file and in particular processes the no service password-recovery command.
What would happen if you answered with n to this second question, preventing the router from accepting the no password-recovery stored command? Could you reload the router afterwards and try the password recovery procedure again?
Also, if this router has a removable Flash card, would you be able to enter the ROMMON and set the configuration register to 0x2142 if you removed the card and tried booting the router?
Best regards,
Peter
12-09-2013 04:38 AM
When I answer NO to second question the router still continue booting without changing anything...
Still old configuration, still password recovery disabled also after reboot.
I found the good old hardware hacking way to be useful :
As 1760 has no compactflash , I opened the device and remove the 27c4001 flash using an extractor tool
Then I replaced it with a same flash coming from a 1721 router
At first boot it said "corrupted flash, using default"
When boot ends, I power-off 1760 and replaced again the flash with the original one
It still gave me the "corrupted flash, using default" message but I was able to entering rommon with initial BREAK
Thus the usual password recovery was possible.
Thank you for interesting in my issue.
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