Paramiko Banner Error when onboarding

[thomasbridge-gnetwork]

Environment

• Python version: 3.10.12
• Nautobot version: 2.1.2
• nautobot-device-onboarding version: 3.0.1

Expected Behavior

Device would be onboarded!

Observed Behavior

I have Nautobot installed in a WSL Ubuntu environment. Using the device onboarding plugin I get a paramiko error

ERROR: A paramiko SSHException occurred during connection creation:Error reading SSH protocol banner

Output from the job below (there may be some extra output because I've hacked the installed file, but only added print/log statements in an attempt to troubleshoot).

2024-02-21 11:03:48.666333 | initialization | Info | — | Running job
2024-02-21 11:03:48.685867 | _parse_credentials | Info | — | Using napalm credentials configured in nautobot_config.py
2024-02-21 11:03:48.694279 | run | Info | — | START: onboarding devices
2024-02-21 11:03:48.699881 | _onboard | Info | — | Attempting to onboard an0.cano01.gn.local.
2024-02-21 11:03:48.706023 | _onboard | Info | — | NetDevKeeper object created
2024-02-21 11:03:48.733705 | run | Error | — | The following exception occurred when attempting to onboard an0.cano01.gn.local: fail-general - fail-connect - ERROR: A paramiko SSHException occurred during connection creation:Error reading SSH protocol banner
2024-02-21 11:03:48.752323 | post_run | Info | — | Job completed

Steps to Reproduce

1. Install ubuntu on WSL.
2. Install Nautobot + Nautobot onboarding plugin.
3. Try to onboard a network device (with no data loaded).

I have asked on the Slack channel, but wanted to follow up here as Slack is on a different machine and there are some corporate policies that make sending outout to Slack more tricky.

It is clear that the failure is happening in the part of the code where it is attempting to guess the OS (in this case an IOS-XR device). However, running the same code through the nautobot nbshell works successfully.

Googling suggests it might be a banner_timeout setting for paramiko.

[gsnider2195]

Possibly related to nautobot/nautobot-app-golden-config#820 ?

[thomasbridge-gnetwork]

Possibly related to nautobot/nautobot-app-golden-config#820 ?

Looks like it - interestingly I am only seeing the issue on IOS XR and not on IOS XE. The related ticket in the Golden Config also applies to IOS XR devices.

[scetron]

Also, @thomasbridge-gnetwork, you are still hitting this error?