Network discovery fails with paramiko SSHException

[chris-ack-nov]

Hi Folks,
I'm quite new to Nautobot, doing a PoC regarding network automation and other stuff.
I have Nautobot 3.0.5, SSoT 4.0.0 as well as Device Onboarding 5.0.0 App running on a tiny pc with Ubuntu server. Trying to discover first Cisco network devices. The first job "Sync Devices From Network" is working well and creates a device for the Cisco switch. Now I want to discover the interfaces etc. using "Sync Network Data From Network" and here's my actual problem I can't resolve. I already tried different things. Short: I start the job and even in dryrun I get errors like this:
sw-xyz an exception occured: A paramiko SSHException occurred during connection creation:
No authentication methods available
snip
Netmiko Send Commands failed on sw-xyz with result: sw-xyz SSH Timeout Occured.
sw-xyz: Connection or data error, this device will not be synced. None

What I already tried:

• Debug to get more information
• TCP dump telling me there is TCP traffic between Nautobot and the switch.
• Different Secret Groups defining the secret either as "Generic", "SSH" and "Console". Initial discovery works with "Generic"

I'm now kinda lost and googling didn't help either. Since I'm not a dev I can not really handle Python or other programming languages.
My understanding so far is that Nautobot server application and it's underlying modules can reach the switch with tcp port 22, start a ssh connection and then somehow fails.

Hope you can give me some more tips for troubleshooting or maybe a hint where to change something.

Best regards
Christoph

[itdependsnetworks]

I can't really think of why this would be an issue, they should be using the same underlying connection methods. That being said, best to hit up Slack for this.

Feel free to also swing by the Network to Code Slack (channel #nautobot), sign up here if you don't have an account.