3620 IOS upgrade problem

[sevans1979]

Hello!

I need some help. I have a 3620 and it had IOS image 12.3(17a) IP Feature set. I got 12.3(17b) Enterprise plus to upgrade.

The router has 64MB DRAM and 16MB of Flash. I copied the first IOS image over to my TFTP server (just incase). Then I copied over the newer IOS image from the tftp server to my router. The image copied over fine (all !'s) and the checksum was fine (displayed a OK).

Then when I rebooted the router is wont boot up. I uncompresses the image and displays a (OK) after all the ### characters. BUT here is my problem. It then says "error: uncompressed check sum incorrect" or something to that affect. Then it tries to load via the two external flash slots. After that is goes into Rommon 1> mode.

It could be the image or the flash module. Dont think it would be the flash module. How do I put the previous IOS image back on the router via the rommon mode to get this router working again???

Thank you guy and girls in advance!!

Scott

[pkhatri]

It's weird alright...

I wonder if you are game to try this thing that I have had to do sometimes:

First, get rid of the boot system command.

Then, configure the following;

boot bootstrap flash:c3620-i-mz.123-17a.bin

boot system tftp c3620-j1s3-mz.123-17b.bin 10.254.0.254

It's worth a shot :-)

Paresh

[sevans1979]

No go, same result. I guess I will just stick with 12.3(17a) IP until I can get a new flash module.

[desai.jaideep]

Hi

If you are not able to boot then even from ROMMON mode you can.

(1)I used Solarwinds TFTP server available at www.solarwinds.net.

(2)Click File -->Configure-->Security --> Transmit and Recieve both

(3)You will get a command "rommon 1> tftpdnld"

(4)give IP_ADDRESS=(say)192.168.1.1 and so on

(5) give subnet, gateway, tftp server ip, and tftp file.

(6) then rommon 7>tftpdnld -r

Above will load the image and run it

Try it

Regards

JD

[sevans1979]

I am already using Solarwinds TFTP server on a PC in my lab and I know I have it enabled to Recieve and Transmit. I have checked that like 10 times.

I will try your idea in the morning and see if that works

Thank you Desai

Scott

[sevans1979]

According to some docs I found on Cisco's site say that the tftpdlnd command is a feature only available on the 2600 series routers.

Looks like that wont work for my 3620

[desai.jaideep]

Hi

I am having one 3640 and have faced similar prob like this....It had worked on it.

JD

[MUHAMMAD SHAHEEN]

Rename the File name to something else on your tftp server and use that name instead in the router configuration, for example change file c3620-j1s3-mz.123-17b.bin 10.254.0.254 to test.bin.

try this trick and I hope it will work and ensure you have no firewall on the PC/tftp server including WIndowsXP built-in firewall.

Regards

Shaheen