NETWORK_AUTOMATION

 Netmiko

 

                                       

 library to simplify CLI connections to diffèrent network devices on Multi-vendor

Installation

To install netmiko in linux ubuntu use command bellow:

$ pip install netmiko

Exemple connect to devices :

from netmiko import ConnectHandler
from getpass import getpass

password = getpass()
secret = getpass("Enter secret: ")

cisco1 = {
    "device_type": "cisco_ios",
    "host": "cisco1.lasthop.io",
    "username": "pyclass",
    "password": password,
    "secret": secret,
}

net_connect = ConnectHandler(**cisco1)
# Call 'enable()' method to elevate privileges
net_connect.enable()
print(net_connect.find_prompt())
net_connect.disconnect()

Exemple Connecting to multiple devices:

from netmiko import ConnectHandler

from getpass import getpass

password = getpass()

cisco1 = {

    "device_type": "cisco_ios",

    "host": "cisco1.com",

    "username": "admin",

    "password": password,

}

cisco2 = {

    "device_type": "cisco_ios",

    "host": "cisco2.com",

    "username": "admin",

    "password": password,

}

nxos1 = {

    "device_type": "cisco_nxos",

    "host": "nxos.com",

    "username": "admin",

    "password": password,

}

srx1 = {

    "device_type": "juniper_junos",

    "host": "srx1.com",

    "username": "admin",

    "password": password,

}

for device in (cisco1, cisco2, nxos1, srx1):

    net_connect = ConnectHandler(**device)

    print(net_connect.find_prompt())

    net_connect.disconnect()

Exemple executing show command:

from netmiko import ConnectHandler

from getpass import getpass

cisco1 = { 

    "device_type": "cisco_ios",

    "host": "cisco1.com",

    "username": "admin",

    "password": getpass(),

}

# Show command that we execute.

command = "show ip int brief"

with ConnectHandler(**cisco1) as net_connect:

    output = net_connect.send_command(command)

# Automatically cleans-up the output so that only the show output is returned

print()

print(output)

print()

Exemple log file:

#!/usr/bin/env python
from netmiko import ConnectHandler
from getpass import getpass
cisco1 = {
    "device_type": "cisco_ios",
    "host": "cisco1.lasthop.io",
    "username": "pyclass",
    "password": getpass(),
    # File name to save the 'session_log' to
    "session_log": "output.txt"
}
# Show command that we execute
command = "show ip int brief"
with ConnectHandler(**cisco1) as net_connect:
    output = net_connect.send_command(command)

Exemple lab configuration :

In this lab we configure device sw1 and sw2 using network automation machine.

Switch 10 configuration :

hostname sw10

!

boot-start-marker

boot-end-marker

enable password admin

username admin password 0 admin

no aaa new-model

ip domain-name dtn.dz

ip cef

no ipv6 cef

spanning-tree mode rapid-pvst

spanning-tree extend system-id

!

vlan internal allocation policy ascending

!

interface Vlan1

 ip address 192.168.122.10 255.255.255.0

!

ip forward-protocol nd

!

no ip http server

no ip http secure-server

!

ip ssh version 2

!

control-plane

line con 0

line aux 0

line vty 0 4

 login local

!

!

end

Switch 20 configuration :

hostname sw20

!

enable password admin

!

username admin password 0 admin

no aaa new-model

ip domain-name dtn.dz

ip cef

no ipv6 cef

ing-tree mode rapid-pvst

spanning-tree extend system-id

!

vlan internal allocation policy ascending

!

interface Vlan1

 ip address 192.168.122.20 255.255.255.0

!

ip forward-protocol nd

!

no ip http server

no ip http secure-server

!

ip ssh version 2

line con 0

line aux 0

line vty 0 4

 login local

!

!

end

Exemple send command line :

ANSIBLE NETWORK AUTOMATION