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3660 ios installation error

darksilver26
Level 1
Level 1

rommon 2 > xmodem -?

xmodem: illegal option -- ?

usage: xmodem [-cyrx] <destination filename>

-c  CRC-16

-y  ymodem-batch protocol

-r  copy image to dram for launch

-x  do not launch on download completion

rommon 3 > xmodem -c c3660-i-mz.120-7.t.bin

Do not start the sending program yet...

         File size           Checksum   File name

   6376124 bytes (0x614abc)   0x1e31    c3660-i-mz.122-40a.bin (bad checksum: 0xc02f)

WARNING: All existing data in flash will be lost!

Invoke this application only for disaster recovery.

Do you wish to continue? y/n  [n]:  y

Ready to receive file c3660-i-mz.120-7.t.bin ...

Erasing flash at 0x30fc0000

program flash location 0x30410000

ownload Complete!

*** GT64120 Master Abort Interrupt ***

PC = 0x80005624, Cause = 0x4000, Status Reg = 0x3041f003

monitor: command "xmodem" aborted due to exception

rommon 4 >

the only codes under my 3660 rommon are the following

rommon 4 > ?

alias               set and display aliases command

boot                boot up an external process

break               set/show/clear the breakpoint

confreg             configuration register utility

cont                continue executing a downloaded image

context             display the context of a loaded image

cookie              display contents of motherboard cookie PROM in hex

dev                 list the device table

dir                 list files in file system

dis                 disassemble instruction stream

dnld                serial download a program module

frame               print out a selected stack frame

help                monitor builtin command help

history             monitor command history

iomemdef            set IO mem to a default 25%

meminfo             main memory information

repeat              repeat a monitor command

reset               system reset

set                 display the monitor variables

stack               produce a stack trace

sync                write monitor environment to NVRAM

sysret              print out info from last system return

unalias             unset an alias

unset               unset a monitor variable

xmodem              x/ymodem image download

rommon 5 >

i dont have tftpdndl

also i dont have with me a pcmcia card. i just found this old router in my companies stock room which the one using this before says it's still functioning but he always got problems with it. i want to make it work and practice with it for my ccna review.

hope you could help me with this..

i got fee flash modules here i kept on swapping it but still the same problem

2 Replies 2

Leo Laohoo
Hall of Fame
Hall of Fame

Hi Carl,

tftpdnld is not supported on 3660.  The issue is that your IOS is corrupted.  Please download your iOS again from the Cisco website, verify the MD5 checksum before uploading to the router.

how do i verify the BD5 for checksum error?

also where should i download from cisco the IOS for this old router?

i just found this router at my company stock room... i know its working its just that i was put aside for awhile

Review Cisco Networking for a $25 gift card