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New Member

Help Flashing IOS to 2821 Router

Hi All,

i just got a used Cisco 2821 router from Ebay. I have 1GB of memory in it and a 512 Flash card in it. The unit has no OS on it. Well it has a

rommon 1 >

Prompt.

How do I update it to the newest IOS? It doesn't have commands I am used to, like CD or tftp. I tried to use the TFTPDNLD, but it didn't work. I don't know what to do to get the IOS on it and up and running, can anyone help?

Thanks!

Mitch

P.S. There is no show command so I can't do a show run.

Only Commands are:

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

iomemset            set IO memory percent

meminfo             main memory information

repeat              repeat a monitor command

reset               system reset

rommon-pref         Select ROMMON

set                 display the monitor variables

showmon             display currently selected ROM monitor

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

O
Everyone's tags (3)
4 REPLIES
Hall of Fame Super Gold

Help Flashing IOS to 2821 Router

I have 1GB of memory in it and a 512 Flash card in it.

You can copy the IOS from your TFTP server to the CF flash directly using a multi-card reader.

Make sure the CF is formated with FAT16.

New Member

Help Flashing IOS to 2821 Router

Can you give me steps on how to do that? I found a site that tells me how to transfer the image from a TFTP server, but once it is over, it doesn't seem to show up or boot up with it.

Leo Laohoo wrote:

I have 1GB of memory in it and a 512 Flash card in it.

You can copy the IOS from your TFTP server to the CF flash directly using a multi-card reader.

Make sure the CF is formated with FAT16.

Hall of Fame Super Gold

Help Flashing IOS to 2821 Router

Can you give me steps on how to do that?

Do you have a multi-card reader which you can connect to your PC or laptop via USB?

New Member

Help Flashing IOS to 2821 Router

I do, but it looks like I got it. For osme reason the first tftpdnld didn't work, but I tried a different bin and it worked, so I am all good, thanks!

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