netmiko.ssh_exception.NetmikoTimeoutException

[Rutvij-Brahmbhatt]

Hi Guys,

I am using the script to ssh to my router and send some commands from file using "send_config_from_file". The script works fine on PyCharm IDE on Windows, but fails on Ubuntu 20.04 - any ideas why?

My Script:
from netmiko import ConnectHandler
from getpass import getpass

IP_LIST = open('19_devices.txt')
for IP in IP_LIST:
RTR = {
'device_type': 'cisco_xe',
'ip': IP,
'username': 'admin',
'password': 'admin',
}

print('Connecting to the device ' + IP)
net_connect = ConnectHandler(**RTR)
output = net_connect.send_config_from_file(config_file='19_config.txt')
print(output)
print('\n Saving the configuration \n')
output = net_connect.save_config()
print(output)
output = net_connect.send_command('show ip int brief')
print(output)

Error is:
Connecting to the device 10.10.10.10

Traceback (most recent call last):
File "/usr/local/lib/python3.8/dist-packages/paramiko/channel.py", line 699, in recv
out = self.in_buffer.read(nbytes, self.timeout)
File "/usr/local/lib/python3.8/dist-packages/paramiko/buffered_pipe.py", line 164, in read
raise PipeTimeout()
paramiko.buffered_pipe.PipeTimeout

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/lib/python3.8/dist-packages/netmiko/base_connection.py", line 569, in _read_channel_expect
new_data = self.remote_conn.recv(MAX_BUFFER)
File "/usr/local/lib/python3.8/dist-packages/paramiko/channel.py", line 701, in recv
raise socket.timeout()
socket.timeout

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "part20_ssh_to_multiple_devices_from_file_and_configure_from_file.py", line 16, in
output = net_connect.send_config_from_file(config_file='19_config.txt')
File "/usr/local/lib/python3.8/dist-packages/netmiko/base_connection.py", line 1790, in send_config_from_file
return self.send_config_set(cfg_file, **kwargs)
File "/usr/local/lib/python3.8/dist-packages/netmiko/base_connection.py", line 1875, in send_config_set
new_output = self.read_until_pattern(pattern=re.escape(cmd.strip()))
File "/usr/local/lib/python3.8/dist-packages/netmiko/base_connection.py", line 651, in read_until_pattern
return self._read_channel_expect(*args, **kwargs)
File "/usr/local/lib/python3.8/dist-packages/netmiko/base_connection.py", line 579, in _read_channel_expect
raise NetmikoTimeoutException(
netmiko.ssh_exception.NetmikoTimeoutException: Timed-out reading channel, data not available.

[ktbyers]

I would probably try setting: global_cmd_verify=False. This is an argument to ConnectHandler.

[Rutvij-Brahmbhatt]

Tried as below:

from netmiko import ConnectHandler
from getpass import getpass

IP_LIST = open('19_devices.txt')
for IP in IP_LIST:
    RTR = {
        'device_type': 'cisco_xe',
        'ip': IP,
        'username': 'admin',
        'password': 'admin',
        'global_cmd_verify': 'False',
    }

    print('Connecting to the device ' + IP)
    net_connect = ConnectHandler(**RTR)
#    net_connect.enable()
    output = net_connect.send_config_from_file(config_file='19_config.txt')
    print(output)
    print('\n Saving the configuration \n')
    output = net_connect.save_config()
    print(output)
    output = net_connect.send_command('show ip int brief')
    print(output)

Still get the error:
Connecting to the device 10.10.10.10

Traceback (most recent call last):
File "/usr/local/lib/python3.8/dist-packages/paramiko/channel.py", line 699, in recv
out = self.in_buffer.read(nbytes, self.timeout)
File "/usr/local/lib/python3.8/dist-packages/paramiko/buffered_pipe.py", line 164, in read
raise PipeTimeout()
paramiko.buffered_pipe.PipeTimeout

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/lib/python3.8/dist-packages/netmiko/base_connection.py", line 569, in _read_channel_expect
new_data = self.remote_conn.recv(MAX_BUFFER)
File "/usr/local/lib/python3.8/dist-packages/paramiko/channel.py", line 701, in recv
raise socket.timeout()
socket.timeout

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "part20_ssh_to_multiple_devices_from_file_and_configure_from_file.py", line 17, in
output = net_connect.send_config_from_file(config_file='19_config.txt')
File "/usr/local/lib/python3.8/dist-packages/netmiko/base_connection.py", line 1790, in send_config_from_file
return self.send_config_set(cfg_file, **kwargs)
File "/usr/local/lib/python3.8/dist-packages/netmiko/base_connection.py", line 1875, in send_config_set
new_output = self.read_until_pattern(pattern=re.escape(cmd.strip()))
File "/usr/local/lib/python3.8/dist-packages/netmiko/base_connection.py", line 651, in read_until_pattern
return self._read_channel_expect(*args, **kwargs)
File "/usr/local/lib/python3.8/dist-packages/netmiko/base_connection.py", line 579, in _read_channel_expect
raise NetmikoTimeoutException(
netmiko.ssh_exception.NetmikoTimeoutException: Timed-out reading channel, data not available.

[ktbyers]

Probably need to do:

output = net_connect.send_config_from_file(config_file='19_config.txt', cmd_verify=False)

There might be a separate issue where global_cmd_verify is not wired in for send_config_set/send_config_from_file. I need to possibly fix that.

[nimishb98]

Hello @ktbyers,

I have two cisco routers and running an automation tool on them, I'm getting a Timed-out error intermittently on one of my routers. I have read through #212 and #1151. I am not changing the hostname (however configuring the same hostname again).

Note: I am using Netmiko 2.1.1 Release.

Error Stack:
-Fail-----2022-12-20T17-31-18.678[MainThread][star_trig_general]> Failed to load the config on Router : router1 - Timed-out reading channel, data not available.
Traceback (most recent call last):
File "/lib/python3.6/site-packages/paramiko/channel.py", line 699, in recv
out = self.in_buffer.read(nbytes, self.timeout)
File "/lib/python3.6/site-packages/paramiko/buffered_pipe.py", line 164, in read
raise PipeTimeout()
paramiko.buffered_pipe.PipeTimeout
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/lib/python3.6/site-packages/netmiko/base_connection.py", line 446, in _read_channel_expect
new_data = self.remote_conn.recv(MAX_BUFFER)
File "/lib/python3.6/site-packages/paramiko/channel.py", line 701, in recv
raise socket.timeout()
socket.timeout
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/triggers/trig_general.py", line 253, in execute
pxe_user_name, pxe_password, replace_config=False)
File "/infra/utils.py", line 442, in load_config
new_prompt='.*#', commit_str=commit_str)
File "/devices/device.py", line 2685, in config
return_data = self._config(cmd_list=cmd_list, handle=handle, *args, **kwargs)
File "/devices/device.py", line 2571, in _config
data = handle.config(cmd_list=cmd_list, *args, **kwargs)
File "/connection/connection.py", line 999, in config
self._end_config(**kwargs)
File "/connection/connection.py", line 920, in _end_config
nm_handle.exit_config_mode(exit_config=config_end_cmd, skip_check=skip_check)
File "/lib/python3.6/site-packages/netmiko/cisco/cisco_xr.py", line 246, in exit_config_mode
if self.check_config_mode():
File "/lib/python3.6/site-packages/netmiko/cisco/cisco_xr.py", line 227, in check_config_mode
output = self.read_until_pattern(pattern=pattern)
File "/lib/python3.6/site-packages/netmiko/base_connection.py", line 518, in read_until_pattern
return self._read_channel_expect(*args, **kwargs)
File "/lib/python3.6/site-packages/netmiko/base_connection.py", line 454, in _read_channel_expect
raise NetMikoTimeoutException("Timed-out reading channel, data not available.")
netmiko.ssh_exception.NetMikoTimeoutException: Timed-out reading channel, data not available.

Can you please help me? Please let me know if you need more information.

Thanks