I am not able to upload a new IOS file to a 3850 switch currently on 16.6.5.
TFTP transfer fails with:
%Error opening tftp://10.x.x.x/cat3k_caa-universalk9.16.06.06.SPA.bin (Timed out)
Copying from USB fails:
%Error reading usbflash0:/cisco/cat3k_caa-universalk9.16.06.06.SPA.bin (I/O error)
There is more than enough space on the flash. I tried different IOS version files with no success. Also tried different USB sticks and 2 different TFTP servers.
Solved! Go to Solution.
Yes, the USB is FAT32, and yes, I can ping the TFTP server.
I only have this problem on switches on version 16.6.5. I have no problem transferring the file to a switch on an older version like 3.6.8e
I just tried FTP and it worked. Which gives me one working option.
Not sure why TFTP is failing. I will upgrade to the new version and see if TFTP is still messed up.
Thanks for your suggestion
This bug is reported on 16.6.6, but it looks like it is happening on 16.6.5 as well.
Would it be possible if a TAC Case is raised?
This would give TAC a sense of "visibility" on how many people are affected by this bug. Make sure TAC also updates the "known affected version" to include 16.6.5.
I found I had to remove and replace the USB 3 to 4 times on devices each time it looked like more had copied accross until it completed
I spent today more than 2h trying anything from IPS tshoot, to GPO review, to FW drops review, installing a VM into the mgmt. vlan of the network devices, playing with tftp helper, changing TFTP software and so on.
All 16.6.6 old devices are affected: 4300 ISR routers, 3650, 3850.
The newer 9300 running 16.6.6 is fine.