IOS recovery for 3725

nel

Hi,

Can anyone give me any help on copying an IOS to a 3725 in rommon? Ive borrowed this from a friend who had it spare but it has no image on it. i thought you would be able to use tftpdnld but the option is not available. Ive also tried the xmodem option and the bytes counter moves but it doesnt look like anythings happening - ive left it running for hours too!

Can anyone give any advice? Is there a confreg mode i can change to boot into?

IT Man

Not sure or not but if that router have a usb or compact flash reader on it? If so, you may be able to load the IOS on one of those and boot the router from the USB or Compact flash drive.

tiersten

You can boot off the CF slot by doing "boot system slot0:c3725-blahblahblah.bin"

Downloading an IOS image via xmodem will take forever. The usual trick is to find the smallest IP base image you can and then use TFTP to transfer your real IOS over.

shednik

tiersten wrote:

You can boot off the CF slot by doing "boot system slot0:c3725-blahblahblah.bin"

Downloading an IOS image via xmodem will take forever. The usual trick is to find the smallest IP base image you can and then use TFTP to transfer your real IOS over.

This would be the best scenario but this could work as well....

http://dataplumber.wordpress.com/2007/03/16/loading-ios-image-via-tftp-in-rommon/

Along with some information form cisco's website...

http://www.cisco.com/en/US/docs/routers/access/800/820/software/configuration/guide/rommon.html#wp1020649

nel

tiersten wrote:

You can boot off the CF slot by doing "boot system slot0:c3725-blahblahblah.bin"

Downloading an IOS image via xmodem will take forever. The usual trick is to find the smallest IP base image you can and then use TFTP to transfer your real IOS over.

Thanks for the replies,

wont the above quote only work if there is any image on flash already? also do you mean transfer the ipbase over using xmodem? if so, sadly i dont have access to an ipbase ios.

Not sure or not but if that router have a usb or compact flash reader on it? If so, you may be able to load the IOS on one of those and boot the router from the USB or Compact flash drive.

Sadly it doesnt have these.

Any idea's as its a good router and i dont want it to go to waste when i could be using it

mikej412

Did you modify the config register to change the console port to a higher speed before you tried XMODOM? If you were at 9600 baud it will take forever and a day to transfer over an image,

nel

Hi guys,

Well in the end i have an image on it now. Originally i changed the rate to 115200 but obviously i did not give it long enough! i started the process again before my last post and it took over 3 hours...guess i was just impatient i also think its because im used to using tftpdnld which is alot faster but the router does not support that command.

Anyway, incase anyone gets this problem here's the link i used:

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

tiersten

nel wrote:

tiersten wrote:

You can boot off the CF slot by doing "boot system slot0:c3725-blahblahblah.bin"

Downloading an IOS image via xmodem will take forever. The usual trick is to find the smallest IP base image you can and then use TFTP to transfer your real IOS over.

Thanks for the replies,

wont the above quote only work if there is any image on flash already? also do you mean transfer the ipbase over using xmodem? if so, sadly i dont have access to an ipbase ios.

You'd put a copy of IOS onto the CF card using another router or a PC.

You don't specifically need IP Base. The reason why I mentioned IP Base is because it is the smallest image and would take the least amount of time to transfer via xmodem. Once you've booted this small IOS then you can use TFTP from that to transfer your real IOS version across. You can directly send over your IOS version via xmodem if you want. It will just take longer.

nel

You'd put a copy of IOS onto the CF card using another router or a PC.

You don't specifically need IP Base. The reason why I mentioned IP Base is because it is the smallest image and would take the least amount of time to transfer via xmodem. Once you've booted this small IOS then you can use TFTP from that to transfer your real IOS version across. You can directly send over your IOS version via xmodem if you want. It will just take longer.

Thanks for clearing that up, makes perfect sense - all good for my learning process!