Network Automation: Multithreading in Netmiko Script for Concurrent command execution
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In this video, we're going to learn how to use the Python threading module to executecommands concurrently on multiple devices. This will allow us to create network automation scripts that are fast and efficient.
Netmiko is a powerful network automation platform that makes it easy to create and manage network commands. In this video, we're going to learn how to use the Python threading module to create network automation scripts that are fast and efficient.
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Script
from netmiko import ConnectHandler, exceptions
from datetime import datetime
import threading
lab_csr = {
'device_type': 'cisco_ios',
'host': '192.168.0.63',
'username': 'admin',
'password': 'admin'
}
vIOS1 = {
'device_type': 'cisco_ios',
'host': '192.168.0.61',
'username': 'admin',
'password': 'admin'
}
vIOS2 = {
'device_type': 'cisco_ios',
'host': '192.168.0.62',
'username': 'admin',
'password': 'admin'
}
hosts = [lab_csr, vIOS1, vIOS2]
start_time = datetime.now()
def netmiko_connect(**device):
try:
net_connect = ConnectHandler(**device)
print(f"Connected Successfully to the Device: {device['host']}")
output = net_connect.send_command('show version')
print(output)
print(f"Writing output to the File: {device['host']}.txt")
with open(f"{device['host']}.txt", 'w') as data:
data.write(output)
net_connect.disconnect()
except exceptions.NetmikoAuthenticationException:
print(f"Authentication failed on {device['host']}")
except exceptions.NetmikoTimeoutException:
print(f"Session timeout on {device['host']}")
cisco_config_threads = []
for host in hosts:
config_thread = threading.Thread(target=netmiko_connect, kwargs=host)
config_thread.start()
cisco_config_threads.append(config_thread)
for thread in cisco_config_threads:
thread.join()
end_time = datetime.now()
print(end_time - start_time)
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