Re: Help me with my 3660 router showing garbage

darksilver26 · ‎03-19-2011

help me please.... what's wrong with my 3660 router?

it shows garbage upon boot up

"óXTNxØ.óX.óxNX.X.X.X.NxT.xÐNxNXØNxN.xÛNx.X.X.X.X.XT.XTNxÐN.xNXÚ.XNXNxNxX.XNxTNX.X.xL.xÚNNxT.xT.xØNxNXÐNxNxO.xÛNNxL.x.X.XxNX.XT.XÐ.X.xLXÚNNxT.x.XNXNNx.XNxÐNxNxL.xØNNxT.XNxO.xØNX.xNXÚNNx.XÐ.XNXNxNx\.xØN8NxTNx.XNxN.xÛNX.XNxNxNXØNxNXÐ.X.NxN.xÛNNXNX.X.X.xÐNxNxNxÐNxN.xÚNNx\.X.6.zXØxNNx.XNxNX.NxT.xØNxNxO.X.zO"

Console port(router)<=>RJ45<=Rollover=>RJ45<=>Modular RS232 adapter(Female)<=>RS232 Port(male com1)

help me please...

Peter Paluch · ‎03-19-2011

Hello Carl,

It is possible that the console port speed has been changed from the default setting of 9600bps to a different value. That is the most common reason for seeing the garbage. In your terminal software (HyperTerminal, PuTTY, etc.), try changing the COM port speed, starting from 1200bps and proceeding through 2400, 4800, 9600, 19200, 38400, 57600 to 115200 bps. Each time you change a setting, hit Enter a couple of times to see if the router starts responding normally. If not, proceed to the next available setting.

Should you find the appropriate setting, you may either keep it, or put the console speed back to 9600bps using the commands:

configure terminal

line con 0

speed 9600 ! After entering this, the console will stop again - change back to 9600 bps

end

Best regards,

Peter

darksilver26 · ‎04-12-2011

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 0x307c0000

program flash location 0x30410000

Download Complete!

*** GT64120 Master Abort Interrupt ***

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

monitor: command "xmodem" aborted due to exception

i got this error whenever i tried to upload an IOS.

cadet alain · ‎04-12-2011

Can you try with tftpdnld in ROMMON: http://www.cisco.com/en/US/products/hw/routers/ps259/products_tech_note09186a008015bf9e.shtml

Regards.

Alain.

Don't forget to rate helpful posts.

darksilver26 · ‎04-13-2011

thank you for your response.

but unfortunately

tftpdnld is not supported in my 3660 router.

rommon 1 > ?

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

yzeledon · ‎04-13-2011

Hi,

TFTPDNLD is not supported on the 3660, but, look at the following link:

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

XMODEM is the only option, although if you have a PCMCIA card, you can upload the IOS there and try to recover it.

I can recommend you to try xmodem again with 2 options:

1- Regular xmodem of the image to the flash

2- Xmodem to the DRAM directly

For option 1, use the following configuration:

rommon 2 > confreg
do you wish to change the configuration? y/n [n]:  y
enable  "diagnostic mode"? y/n  [n]: n  
enable  "use net in IP bcast address"? y/n  [n]: n 
disable "load rom after netboot fails"? y/n  [n]: n 
enable  "use all zero broadcast"? y/n  [n]: n 
enable  "break/abort has effect"? y/n  [n]: n 
enable  "ignore system config info"? y/n  [n]: n 
change console baud rate? y/n  [n]:  y
enter rate: 0 = 9600,  1 = 4800,  2 = 1200,  3 = 2400
            4 = 19200, 5 = 38400, 6 = 57600, 7 = 115200  [7]:  7
change the boot characteristics? y/n  [n]:  y
enter to boot:
 0 = ROM Monitor
 1 = the boot helper image
 2-15 = boot system
    [0]:  0

    Configuration Summary

enabled are:
load rom after netboot fails
console baud: 115200
boot: the ROM Monitor
do you wish to change the configuration? y/n  [n]: n
You must reset or power cycle for new config to take effect
rommom 2 > reset

Open a new hyperterminal with these settings:

Bits per second - 115200 
Data bits - 8 
Parity - None 
Stop bits - 1 
Flow control - Hardware

After setting the hyperterminal, you receive a rommon prompt. Enter the xmodem command. Before you enter an xmodem command, there should be a software image residing in your terminal or your local hard drive.

rommon 2 > xmodem -c c3660IOS.bin

For option 2 just change the last option:

rommon 2 > xmodem -r c3660IOS.bin

I recommend you to use a small image to make the upload faster and then upgrade to the image you want to use using regular TFTP.
If the problem persist on the second option we could be looking at a hardware problem.

Cheers,
Yanil

darksilver26 · ‎04-13-2011

thank you for the reply....

i tried your suggestions still wasn't able to boot the router aside from rommon mode..

but odd..

i got 1 flash which i havent reflash with a newer IOS.

i put it back on and i was able to veryify with no checksum error...

i manage to boot fully upto the configuration mode

i was also able to show run and show version.

but while idle.. it show a message "bad ram on location "hex value" "

it hangs-up..

i shutdown the router...

then boot it up...

back to rommon mode and had a checksum error

yzeledon · ‎04-14-2011

Hi Carl,

It does sound like a hardware problem. To verify we can try with a different IOS image if it doesn't boot, then we can assume it is hardware.

Cheers,

Yanil