Please keep in mind it's very important that you do EXACTLY what these instructions tell you to. A mistype could result in the frying of your router. In addition, I will take no responsibility for any damage to your router as a result of using these instructions -- proceed at your own risk
Download a
CBOS image from your
DSL provider's website,
NOT FROM CISCO...
UPDATE:
All current CBOS images are on the DSL updater CD. Simply install DSL updater (you can cancel when you get to preliminary instructions) and browse to "c:\program files\dsl updater\CBOS Images" The images are named fairly intuitively. For example, for a Cisco 678 in CAP mode, choose nsrouter.c678cap.2.4.3.bin.
Terminal in to the
67x
Get into
debug mode
Type in the following command at the "=>" prompt:
=>df 10008000
At this point the
67x is now ready to recieve the new
CBOS image. You should see a string of the letter c scrolling across the screen. Go to the "Transfer" menu, and select "send file". "
Protocol" needs to be set to "
Xmodem". Click the browse button and find the image that
you downloaded and
unzipped.
It is ABSOLUTELY critical that power not be interrupted during this process.
Transferring the file usually takes a
few minutes. The file size will be reported when it is done, it will be a hexidecimal number.
Note this, we will need it later.
Issue these and only these commands (WARNING: if you don't do exactly those commands and no more you may turn your
67x into a paperweight).
IT IS ABSOLUTELY IMPORTANT THAT YOU DO NOT TYPE "es 5", I REPEAT, DO NOT TYPE "es 5" (see above).
=>es 0
=>es 1
=>es 2
=>es 3
=>es 4
=>es 6
These commands erased sectors 0-4 (the area in the
NVRAM where the old
CBOS was stored)
Use the following command to reprogram it with the new
CBOS image that you just downloaded from your computer.
=>pb 10008000 fee00000 xxxxxxxx
where "xxxxxxxx" is the file size that you should have wrote down earlier.
You should see the following when it's done:
Programming flash address 00000000 from 10008000...
Flash Programmed.
After this process is complete and you get back to the "=>" prompt, powercycle the router and you are ready to
configure the router.
Click Here for more info on the Cisco 67x.