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Router out of mem since Image update - constantly rebooting

whiteford
Level 1
Level 1

I have a cisco 837 router, I have updated the routers IOS and it seems the image could be too big, as it boots up it's says it's out of memory then reboots and so on and so on. I want to put a smaller image (IOS) back on to it, but if it keeps rebooting I can't, any ideas around this?

19 Replies 19

Pavel Bykov
Level 5
Level 5

You need to connect to the router using console cable and break the boot sequence. You will enrer rommon. Ther you will need to delete the new image and load the old image.

spremkumar
Level 9
Level 9

Hi

Login via the console port and make sure you are getting onto the rommon prompt with ctrl+brk sequence keys.

After you get onto the box do refer any of recovery procedures mentioned in this link.

http://www.cisco.com/en/US/products/hw/routers/ps380/products_tech_note09186a008009429e.shtml

regds

I'm trying:

rommon 1 > set IP_ADDRESS=ip_address

rommon 1 > set IP_SUBNET_MASK=ip_subnet_mask

rommon 1 > set DEFAULT_GATEWAY=default_gateway

rommon 1 > set TFTP_SERVER=TFTP_server

rommon 1 > set TFTP_FILE=TFTP_file

rommon 1 > save

but set is not found?

it says :

rommon 1 > set

BSI=0

RET_2_RUTC=0

RET_2_RTS=15:56 UTC Aug 1 2007

CRASHINFO=flash:crashinfo_20020301-000042

?=1

I can't get to that, only rommin:

I'm trying:

rommon 1 > set IP_ADDRESS=ip_address

rommon 1 > set IP_SUBNET_MASK=ip_subnet_mask

rommon 1 > set DEFAULT_GATEWAY=default_gateway

rommon 1 > set TFTP_SERVER=TFTP_server

rommon 1 > set TFTP_FILE=TFTP_file

rommon 1 > save

but set is not found?

it says :

rommon 1 > set

BSI=0

RET_2_RUTC=0

RET_2_RTS=15:56 UTC Aug 1 2007

CRASHINFO=flash:crashinfo_20020301-000042

?=1

Tried that it keeps rebooting, my image erazed the boot (only) image on the router.

Try "dnld" command to load the image using xmodem. You can use hyperterminal (or other terminal emulation software you are using) and send the software using console cable.

I have putty and HT, on my laptop I have a tftp server running with a good image. Can you explain how I will do this please?

Thanks

hi

try with HT ...

did u try dnld command as mentioned out by Pavlo ?

regds

I'm trying to, but what are the commands etc to do this?

I have the imagine on my laptop and on a tftp server on my laptop. My laptop has a console cable connect to the router.

hi

can you issue "?" and paste the available commands out there in ur current prompt wherever you are stuck up at present ?

regds

!rommon 18 > ?

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 cookie PROM in hex

dev list the device table

dir list files in file system

dis display instruction stream

dnld serial download a program module

frame print out a selected stack frame

help monitor builtin command help

history monitor command history

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

tftpdnld tftp image download

unalias unset an alias

unset unset a monitor variable

xmodem x/ymodem image download

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