Help restoring a 3620 IOS

[Paolo Rocca]

[b]Hi everybody![/b]

I have a cisco 3620 Router, since i bought it there was no IOS installed so i'm trying to figure out how to get it working..

[b]The router is configured as follow.[/b]

[i]System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)

oC3600 processor with 65536 Kbytes of main memory

Main memory is configured to 32 bit mode with parity disabled

device does not contain a valid magic number

boot: cannot open "flash:"

boot: cannot determine first file name on device "flash:"

System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)

oC3600 processor with 65536 Kbytes of main memory

Main memory is configured to 32 bit mode with parity disabled

rommon 1 >

[/i]

And this is the result of [i]meminfo[/i]:

[i]Main memory size: 64 MB in 32 bit mode.

Available main memory starts at 0xa000e000, size 65480KB

IO (packet) memory size: 25 percent of main memory.

IO memory is configured by user

NVRAM size: 32KB[/i

Now the story:

I tried installing this immage: c3620-ik2s-mz.121-27b.bin, trougt [i]xmodem -cyr[/i], after 4 hours it rebooted and loaded the IOS but it was password protected!

I decided to reboot and press ctrl+breck to password recovery but i had an error message:

[i]oPC = 0xbfc0a024, Cause = 0x2000, Status Reg = 0x3041f003[/i]

And then the boot stopped.

At the next sitch on/off it was like before the upload of IOS,.

[i]System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)

oC3600 processor with 65536 Kbytes of main memory

Main memory is configured to 32 bit mode with parity disabled

device does not contain a valid magic number

boot: cannot open "flash:"

boot: cannot determine first file name on device "flash:"

System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)

oC3600 processor with 65536 Kbytes of main memory

Main memory is configured to 32 bit mode with parity disabled

rommon 1 >[/i]

i allso tried sending the ios trougt tftpdlnd but it seems not to support that command since it doesn't have any native ethernet port...

i tried again sending trought xmodem increasing baud rate to 115200 but after that i'm not able anymore to access trought console!!! neither setting to 115200 speed rate...

So, what can be done?

[andtoth]

Hi,

I would recommend you to check the following guides.

ROMmon Recovery for the Cisco 3600/3700/3800 Series Routers

http://www.cisco.com/en/US/products/hw/routers/ps274/products_tech_note09186a008009429f.shtml

Xmodem Console Download Procedure Using ROMmon

http://www.cisco.com/en/US/products/hw/routers/ps259/products_tech_note09186a008015bfac.shtml

Password Recovery Procedure for the Cisco 3600 and 3800 Series Routers

http://www.cisco.com/en/US/products/hw/routers/ps274/products_password_recovery09186a0080094774.shtml

Best regards,

Andras

[Alexander Pai]

You're on the right track.  You had the right idea loading the IOS image via xmodem.  The only easier option is to use a PCMCIA/CF card reader.  However, before doing the code load, we need to change the configuration register to bypass the startup configuration when IOS loads.  Assuming you keep the default console settings, the configuration register would then be 0x2142.

IOS will then load, and you should be able to enter enable mode to set the config register back to 0x2102, and configure the device.  I'd recommend reformatting your flash file system and redownloading the IOS image to flash once in IOS.

-Alex