Cisco L3 WS C3550 24Power SMI do not boot to switch prompt via console connected via tera term or putty

[arindomsil]

Hi All...

My name is Arindom and from IN Kolkata.

I have found that my Cisco L3 WS C3550 24Power SMI switch has corrupted flash.

As it has no other option I tried to boot it via console but failed deliberately.

Upon powered on - the system light (led) blinks in green for few seconds after that port 1 led goes off with remaining led ports green steady and the system light (led) becomes steady green.

I never get any dialogue or switch connectivity via console.

Tried to put this switch on for several hours and then turned it off. 

Once happens I get the switch prompt back and found it is being forced reload.

the image file loaded in there is c3550-ipbase-mz.122-44.SE3,bin

I found the image file name shown is  c3550-ipbase-mz.122-44.SE#,bin

I then tried formatting flash.

while I saw several flash blocks are damaged or corrupt and dialogue comes about fixing.

But immediately after that it again goes unresponsive.

I switched it off and powered on.

still now I am unable to get back the switch prompt via tera term or putty.

Please suggest on this.

I think my flash chip is gone corrupt and need to replace the chip will only solve.

Please suggest your valuable opinion in this regards

Arindom

Kolkata

IN

[balaji.bandi]

Setup a TFTP software in the network and copy the image into TFTP  ( make sure you check the image you downloaded correct0 check with md5 checksum to verify also.

Try below steps : ( make sure you change the IP and IOS verion you looking to load in to device - change accordingly)

switch: IP_ADDRESS=192.168.1.1

switch: IP_SUBNET_MASK=255.255.255.0

switch: TFTP_SERVER=192.168.1.2

switch: TFTP_FILE=c3550-ipservicesk9-mz.122-35.SE5.bin

switch: DEFAULT_GATEWAY=192.168.1.1

switch: set

BOOT=tftp://192.168.1.2/c3550-ipservicesk9-mz.122-35.SE5.bin

............

switch: boot tftp://192.168.1.2/c3550-ipservicesk9-mz.122-35.SE5.bin

Once it boot switch #

Format the flash and copy the image from TFTP to Switch - setup the boot variable as per the below document and wr and test.

https://www.cisco.com/c/en/us/support/docs/switches/catalyst-3550-series-switches/41541-190.html#concept2

[marce1000 · Accepted solution]

 Ref : https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/15-2_4_e/configurationguide/b_1524e_consolidated_3750x_3560x_cg/b_1524e_consolidated_3750x_3560x_cg_chapter_0111011.html?bookSearch=true#task_7591ACFAB45342B29F44...

                        Check if you still might be able to recover the flash : start from step 3

 M.

[arindomsil]

1st of all, I like to give thanks for this early and prompt help.

I have found that the image originally I loaded c3550-ipbase-mz.122-44.SE3.bin was corrupted as after transferring it via tftp method - it says bad zip and invalid zip method.

I then changed the file ios with another ip base image with different train ID like SE6.bin....it boots and extracted successfully.

But now I have stuck in another problem. I have attached the exact notification for your ready reference and guide me further sir.

Thanks

Arindom Sil

IN

Kolkata

[marce1000]

 - If you tried another ip base image, then verify it (too) using md5 checksum verification before loading into the switch.

 M.