IOS Image Upgrade

[Long9zhen]

I have a strange problem.  I'm trying to upgrade the IOS on a C3750 & C3850 switches using Solarwinds TFTP server.  I can initiate the IOS to from the TFTP to the switch.  From the console:  It seems to run (displays !!!!!!!!!!!!!!!!!!...) then I get %Error reading tftp://..... (Transfer aborted).  On the TFTP console the message "GET. Dropped because peer didn't respond" followed by "interrupted by client, received error packet with code: 0 and message: Session terminated.

It appears I can sent config files between (either direction) the tftp: and flash: all day long without any problems, so I know it's not a connectivity issue between the server and switch.  In addition, I can upgrade the IOS on C3560, 3560CX, 29XX, all day long successfully w/o problems.  But cannot successfully upgrade IOS on 3750 & 3850....What is the magic?  Has anybody seen this problem before?

[javier.delos.santos]

for the 3850 dont break your head and use an flash drive with the image

[johnd2310]

Hi,

Try another tftp server like Tftpd64.

Thanks

John

[Dennis Mink]

are you actually trying to boot using tftp, or are you pumping the ios file across with tftp?

use ftp to transfer file, its much quicker.