Python learning for Network Engineers | Part 17 |Netmiko introduction for Cisco SSH configuration
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Introduction to Netmiko.
Simplifies SSH to the networking device
Simplifies execution of show command as well as configuration in to the device
textfsm:can extract the date from output and give it in a structured way.
Installation Command:
pip install netmiko
Netmiko commonly-used methods:
net_connect.send_command() – Send command down the channel, return output back (pattern based)
net_connect.send_command_timing() – Send command down the channel, return output back (timing based)
net_connect.send_config_set() – Send configuration commands to remote device
net_connect.send_config_from_file() – Send configuration commands loaded from a file
net_connect.save_config() – Save the running-config to the startup-config
net_connect.enable() – Enter enable mode
need to import the ConnectHandler function from Netmiko.
then define a network device dictionary which contains device_type, ip, username, and password.
verbose in for detailed logging.
Dictionaries:
will have mapping between key and value
Order is not mandatory here
Script sample:
from netmiko import ConnectHandler
from getpass import getpass
password = getpass()
RTR_10 = {
‘ip’: ‘10.10.10.10’,
‘username’: ‘admin’,
‘password’: ‘admin’,
‘device_type’: ‘cisco_ios’,
}
net_connect = ConnectHandler(**RTR_10)
config_commands = [ ‘int lo0’,
‘ip add 1.1.1.1 255.255.255.0’,
‘no shut’ ]
output = net_connect.send_config_set(config_commands)
print(output)
output = net_connect.send_command(‘show ip int brief’)
print(output)
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