Got errors when uploading IOS via xmodem in my 3660 router

[darksilver26]

rommon 6 > xmodem -c c3660-i-mz.122-40a.bin

Do not start the sending program yet...

         File size           Checksum   File name

   6371604 bytes (0x613914)   0x2d8d    c3660-i-mz.122-26.bin (bad checksum: 0xb195)

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.122-40a.bin ...

Erasing flash at 0x30fc0000Erasing flash at 0x30d40000

program flash location 0x30610000

Download Complete!

*** GT64120 Master Abort Interrupt ***

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

monitor: command "xmodem" aborted due to exception

rommon 7 > set

PS1=rommon ! >

CRASHINFO=flash:crashinfo_19930301-001901

RET_2_RTS=

BSI=0

RET_2_RCALTS=

?=1

rommon 8 >

what's wrong with my 3660 router? i already changed my flash memory still the same..

[Leo Laohoo]

   6371604 bytes (0x613914)   0x2d8d    c3660-i-mz.122-26.bin (bad checksum: 0xb195)

File is corrupt.

[darksilver26]

how would i clean up my flash memory to delete the existing IOS? so that this error won't appear?

rommon 2 > meminfo

Main memory size: 256 MB in 64 bit mode.

Available main memory starts at 0xa000e000, size 262088KB

IO (packet) memory size: 0 percent of main memory.

NVRAM size: 128KB

rommon 3 > set

PS1=rommon ! >

CRASHINFO=flash:crashinfo_19930301-001901

RET_2_RTS=

BSI=0

RET_2_RCALTS=

?=0

rommon 4 >

[Leo Laohoo]

Check your memory using the command "dir flash<0 or 1>:".  If the file(s) there then erase using the command "delete flash<0 or 1>:".  If  it's a directory, then you'll need to go into that directory and use the same command to delete a file.

Besides the crashinfo file is the least of your worries.  The issue you have is your IOS you're uploading is corrup.  You need to re-download the IOS from the Cisco Download Centre and check/verify that the MD5 checksum is correct before transfering the IOS to the router.

[darksilver26]

rommon 9 > ?

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 10 > set

PS1=rommon ! >

CRASHINFO=flash:crashinfo_19930301-001901

RET_2_RTS=

BSI=0

RET_2_RCALTS=

?=0

rommon 11 > dir flash0:

bad device name

usage: dir

rommon 12 > dir flash:

         File size           Checksum   File name

   6376124 bytes (0x614abc)   0x1e31    c3660-i-mz.122-40a.bin (bad checksum: 0x31df)

rommon 13 > delete flash: c3660-i-mz.122-40a.bin

monitor: command "delete" not found

rommon 14 >

Those are the available commands. delete function is not found... ok... i guess i have to download a new IOS