03-24-2022 12:43 PM
I'm trying to transfer an IOS image down to a 3650 switch and on every attempt, I get the following:
%Error opening sftp://*@192.168.174.174/c1100-universalk9.16.12.05.SPA.bin (Transfer aborted)
This happens no matter what server IP I use (we have three). I've tested this with other 3650s at remote branch office locations and they all work.
Our firewall logs do show a difference - for the switch in question, we see the firewall log indicate the session was ended by a TCP RST from the client. For the switches where the SFTP works, the end of the session is a TCP FIN. Obviously, the switch I'm working with is the issue.
My question - has anyone seen this? What else besides a sniffer capture can I do to troubleshoot this?
Solved! Go to Solution.
03-25-2022 01:32 AM
Hello,
is there a difference in the SSH settings between the non-working and the working switches ? Or the ssh source interface being used ?
03-24-2022 02:53 PM
NOTE: You're transferring an firmware meant for a 1100 router into a 3650, is that correct?
How about TFTP?
What is the current firmware version of the switch?
Reboot the switch and see if it makes any difference.
03-24-2022 03:22 PM
03-25-2022 12:23 AM
- In 'worst case' it could recognize that the image is wrong and abort , not sure that happens , to exclude use valid image for the device.
M.
03-25-2022 01:32 AM
Hello,
is there a difference in the SSH settings between the non-working and the working switches ? Or the ssh source interface being used ?
03-25-2022 05:38 AM
Georg - good call. I had added the command "ip ssh window-size 131072" in an attempt to speed up the transfer. When I removed that, the SFTP transfer worked.
As for the other idea - all other switches were successfully able to download the 1100 router image, so I knew that wasn't the issue.
Thanks for the responses!
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