Python Network Automation with Netmiko and NAPALM

pip install netmiko napalm

from netmiko import ConnectHandler

device = {
    'device_type': 'mikrotik_routeros',
    'host': '192.168.1.1',
    'username': 'admin',
    'password': 'password',
}

with ConnectHandler(**device) as conn:
    output = conn.send_command('/ip address print')
    print(output)

import json
from datetime import date
from netmiko import ConnectHandler
from pathlib import Path

devices = json.load(open('devices.json'))
backup_dir = Path(f"backups/{date.today()}")
backup_dir.mkdir(parents=True, exist_ok=True)

for device in devices:
    try:
        with ConnectHandler(**device) as conn:
            if device['device_type'] == 'mikrotik_routeros':
                config = conn.send_command('/export')
            elif device['device_type'] == 'cisco_ios':
                config = conn.send_command('show running-config')
            
            filename = backup_dir / f"{device['host']}.txt"
            filename.write_text(config)
            print(f"✓ {device['host']} backed up")
    except Exception as e:
        print(f"✗ {device['host']}: {e}")

from napalm import get_network_driver

driver = get_network_driver('ios')
device = driver(
    hostname='192.168.1.10',
    username='cisco',
    password='password'
)

device.open()

# Get structured data
facts = device.get_facts()
print(f"Hostname: {facts['hostname']}")
print(f"Uptime: {facts['uptime']} seconds")

interfaces = device.get_interfaces()
for iface, data in interfaces.items():
    status = "UP" if data['is_up'] else "DOWN"
    print(f"  {iface}: {status} — {data['description']}")

# Config diff before applying
device.load_merge_candidate(filename='changes.txt')
print(device.compare_config())

device.commit_config()  # or device.discard_config()
device.close()

def audit_snmp(devices):
    """Check SNMP is configured on all devices"""
    issues = []
    for device in devices:
        with ConnectHandler(**device) as conn:
            output = conn.send_command('/snmp print')
            if 'enabled: no' in output:
                issues.append(f"{device['host']}: SNMP disabled")
    return issues