OS10 will not establish SSH connection for image download SCP

Hi,

I might need to understand your issue. Is it that you can't copy out from switch to server or server to switch?

Can you further elaborate the situation? Or are you trying to copy an image file from the server into the switch? What is your server's OS? Is the switch's management port reachable from the server?

Hi I am having the same problem, cannot download the bin image from a windows or linux server to the switch using  command

image download scp://userid:passwd@hostip:/filepath

I do a show image status and get

State Detail:          Failed: Failure establishing ssh session: -5, Unable to exchange encryp

Please help!

Thanks in advance
 

Hi,

Can you let me know what is the switch model and the firmware version?

Can the switch ping the server?

Have you tried to disable SSH and re-enable SSH on the switch to check if it helps the issue?

We had that problem. This seems to be a bug/discreptancy in the OS10 software. While it copes well with all modern ssh kex algorithms, host keys, and ciphers during normal server->device ssh client access, and vice versa from device to server using ssh client, it somehow doesn't have the same kex/ciphers/hostkeys configuration for scp in the "image" command or during copy command. 

The solution is to allow ssh-rsa host key on the server that hosts images:
HostkeyAlgorithms +ssh-rsa

That solved our problem mentioned here.

@tomeq82​ Could you elaborate on what you needed to do to achieve this? I'm trying to download the image that I have on the VxRail Manager but getting this same error.

What version of vxrail are you using? This might help https://dell.to/3Xf6kHx