IOS Upgrade on Cisco 3750

navneet_78 · ‎02-22-2007

Hi,

Iam doing an upgrade on cisco 3750 to c3750-ipbasek9-mz.122-25.SED1.bin. I notice some circles during the file transfer. But when i do a MD5 check, it looks fine.

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!!!!!!!!!!!!!O!!!!!!!!!!!!!O!!!!!!!!!!!!!O!!!!!!!!!!!!!OO!!!!!!!!!!!!!OOO!!!!!!!!!!!!OO!!!!!!!!!!!!!OOO!!!!!!!!!!!!!OO!!!!!!!!!!!!!OOO!!!!!!!!!!!!!OOO!!!!!!!!!!!!OO!!!!!!!!!!!!!OOO!!!!!!!!!!!!!OO!!!!!!!!!

Am i overlooking something? Is there any problem with the file upgrade.

Please advise.

Regards

Navneet

hoogen_82 · ‎02-23-2007

There is some intermitent loss in connection to the tftp server while recieving the image.

Do ensure you verify the checksum of the image. Also do a verify bootflash: command on ur switch before reloading.

HTH

Hoogen

Do rate if this helps :)

navneet_78 · ‎02-25-2007

Hi Hoogen,

Thanx for the Reply. I did a Verify \MD5 checksum and the output is the same.

So i hope it got copied properly.

Cheers

Navneet

hoogen_82 · ‎02-25-2007

Sure it did then. Verify the checksum too.

HTH

Hoogen

Do rate if i have helped :)

amansoi_5 · ‎02-25-2007

Dear Navneet,

I had also faced similar problem . Can u try changing TFTP Software?

regds,

aman

n-magbade · ‎09-19-2007

I am facing similar problem. Changing the tftp server did not solve it

Richard Burts · ‎09-19-2007

Nojeem

The O in the output indicates a problem with a particular packet being transmitted by TFTP. TFTP has logic to retransmit these packets. When the transfer completes if you do a verify on the new image file and it indicates ok then it should be fine.

If you are getting lots of errors like this it could indicate that there are poor quality or other problems on one of the links that you go through. If you are concerned about the validity of the image file after transfer perhaps you might consider using FTP to make the transfer rather than TFTP. Since FTP uses TCP which is a reliable transport (and TFTP uses UDP) there might be some advantage for TCP in environments with high error rate on some link.

HTH

Rick

HTH

Rick

n-magbade · ‎09-19-2007

Thanks Rick. I thought it might be a link issue but same symptons when directly connected to the switch.