netmiko.exceptions.NetmikoTimeoutException: Paramiko: 'No existing session' error: try increasing 'conn_timeout' to 15 seconds or larger.

Description of Issue/Question

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Setup

Netmiko version

(Paste verbatim output from pip freeze | grep netmiko between quotes below)

netmiko==4.3.0

Netmiko device_type (if relevant to the issue)

(Paste device_type between quotes below)

There's no issue with device_type.

Steps to Reproduce the Issue

This is my python code if I use password authentication:
```
from netmiko import ConnectHandler
```

cisco1 = { "device_type": "cisco_ios", "host": "192.168.1.1", "username": "myUserName", 'password': 'myPassword', 'timeout': 60 }

with ConnectHandler(**cisco1) as net_connect: output = net_connect.send_command("show ip arp")

print(output)

Output:

Protocol Address Age (min) Hardware Addr Type Interface Internet 192.168.2.2 14 aaaa.aaaa.aaaa ARPA GigabitEthernet1/0/1 Internet 192.168.2.1 - bbbb.bbbb.bbbb ARPA GigabitEthernet1/0/1

But this is my code if I use key authentication:

from netmiko import ConnectHandler

key_file = "/root/.ssh/id_rsa" cisco1 = { "device_type": "cisco_ios", "host": "192.168.1.1", "username": "myUserName", "use_keys": True, "key_file": key_file, 'timeout': 60 }

with ConnectHandler(**cisco1) as net_connect: output = net_connect.send_command("show ip arp")

But I can SSH via bash CLI with no issue and it works fine.

This is my `/root/.ssh/confg` file:

Host switch HostName 192.168.1.1 User myUserName IdentityFile /root/.ssh/id_rsa KexAlgorithms +diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 Ciphers aes128-cbc,3des-cbc,aes192-cbc,aes256-cbc


### Error Traceback
(Paste the complete traceback of the exception between quotes below)

Traceback (most recent call last): File "/home/python3.10/venv/lib/python3.10/site-packages/netmiko/base_connection.py", line 1137, in establish_connection self.remote_conn_pre.connect(**ssh_connect_params) File "/home/python3.10/venv/lib/python3.10/site-packages/paramiko/client.py", line 485, in connect self._auth( File "/home/python3.10/venv/lib/python3.10/site-packages/paramiko/client.py", line 818, in _auth raise saved_exception File "/home/python3.10/venv/lib/python3.10/site-packages/paramiko/client.py", line 794, in _auth self._transport.auth_publickey(username, key) File "/home/python3.10/venv/lib/python3.10/site-packages/paramiko/transport.py", line 1664, in auth_publickey raise SSHException("No existing session") paramiko.ssh_exception.SSHException: No existing session

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "", line 1, in File "/home/python3.10/venv/lib/python3.10/site-packages/netmiko/ssh_dispatcher.py", line 399, in ConnectHandler return ConnectionClass(*args, **kwargs) File "/home/python3.10/venv/lib/python3.10/site-packages/netmiko/base_connection.py", line 488, in init self._open() File "/home/python3.10/venv/lib/python3.10/site-packages/netmiko/base_connection.py", line 493, in _open self.establish_connection() File "/home/python3.10/venv/lib/python3.10/site-packages/netmiko/base_connection.py", line 1182, in establish_connection raise NetmikoTimeoutException(msg) netmiko.exceptions.NetmikoTimeoutException: Paramiko: 'No existing session' error: try increasing 'conn_timeout' to 15 seconds or larger.


### Relevant Python code
(Please try to essentialize your Python code to the minimum code needed to reproduce the issue)
(Paste the code between the quotes below)

```python
from netmiko import ConnectHandler

key_file = "/root/.ssh/id_rsa"
cisco1 = {
    "device_type": "cisco_ios",
    "host": "192.168.1.1",
    "username": "myUserName",
    "use_keys": True,
    "key_file": key_file,
    'timeout': 60
}

with ConnectHandler(**cisco1) as net_connect:
    output = net_connect.send_command("show ip arp")

How can I connect to my Cisco switch while I have no issue in the bash?

ktbyers / netmiko