Network device configuration backup and recovery play a crucial role in network security management. It can help us quickly deal with network failures, reduce network maintenance costs, and improve network stability. This article will introduce in detail the concept, importance, classification and specific implementation methods of network device configuration backup and recovery, and provide an example of Python network device configuration backup and recovery.
1. The concept and importance of backup and recovery of network equipment configuration
concept
Network device configuration backup and recovery refers to the process of copying the configuration files of the network device to a safe place to save so that the network device configuration can be quickly restored if a network device fails.
importance
(1) Quickly respond to network failures: When a network device fails, you can quickly restore the network device by restoring the backup configuration file to reduce network interruption time.
(2) Reduce network maintenance costs: Through automated backup and recovery tools, the workload of network administrators can be reduced and network maintenance costs can be reduced.
(3) Improve network stability: Regularly back up network device configurations, which can quickly restore the network when the device is upgraded, replaced or failed, improving network stability.
2. Classification of network device configuration backup and recovery
Manual backup and recovery: By logging into the network device, manually execute commands to configure backup and recovery.
Automated backup and recovery: Use automation tools, such as Python scripts, network management software, etc. to realize automatic backup and recovery of network device configuration.
Remote backup and recovery: Remote login to the device through the network to backup and restore configuration files.
Local Backup and Restore: Perform backup and restore operations on the local computer.
3. Implementation method of Python network device configuration backup and recovery
Preparation
(1) Install Python: Make sure that Python is installed in the system and configure environment variables.
(2) Install dependency library: Install Python third-party libraries, such as paramiko, netmiko, etc. as needed.
Writing Python network device configuration backup and recovery scripts
(1) Log in to the network device: Use the paramiko or netmiko library to log in to the network device.
(2) Backup configuration file: Execute the command to transfer the configuration file to the local computer.
(3) Restore configuration files: Transfer the backup configuration files to the network device and execute the command to restore the configuration.
Execute Python network device configuration backup and recovery scripts
(1) Command line execution: Execute automated backup and recovery scripts through the command line on the local computer.
(2) Timing tasks: Set timing tasks, such as automatically executing backup and recovery scripts every once in a while.
4. Examples of Python network device configuration backup and recovery
Here is a simple Python network device configuration backup and recovery script example for backing up and restoring Cisco device configuration.
# -*- coding: utf-8 -*-
import paramiko
from datetime import datetime
def backup_device_config(host, username, password):
"""
Backup network device configuration
:param host: Device IP address
:param username: login username
:param password: login password
"""
# Create SSH object ssh = ()
ssh.set_missing_host_key_policy(())
# Connect the device (host, username=username, password=password)
# Execute the command to get the configuration file stdin, stdout, stderr = ssh.exec_command('show running-config')
# Get the current time as backup file name now = ().strftime("%Y%m%d%H%M%S")
backup_file = f"{host}_{now}.cfg"
# Save configuration file with open(backup_file, 'w') as f:
(().decode())
# Close the connection ()
print(f"equipment {host} Configuration backup is completed，Backup files：{backup_file}")
def restore_device_config(host, username, password, backup_file):
"""
Recover network device configuration
:param host: Device IP address
:param username: login username
:param password: login password
:param backup_file: Backup file path
"""
# Create SSH object ssh = ()
ssh.set_missing_host_key_policy(())
# Connect the device (host, username=username, password=password)
# Read the backup file contents with open(backup_file, 'r') as f:
config = ()
# Split configuration files to avoid command line length limitations config_lines = ('\n')
# Log in to the device and enter privileged mode stdin, stdout, stderr = ssh.exec_command('enable')
# Enter a privileged password (password + '\n')
()
# Enter configuration mode stdin, stdout, stderr = ssh.exec_command('configure terminal')
# Restore configuration for line in config_lines:
(line + '\n')
()
# Save configuration stdin, stdout, stderr = ssh.exec_command('end')
stdin, stdout, stderr = ssh.exec_command('write memory')
# Close the connection ()
print(f"equipment {host} Configuration recovery is complete，使用Backup files：{backup_file}")
if __name__ == '__main__':
# Device Information host = '192.168.1.1'
username = 'admin'
password = 'admin'
# Backup configuration backup_device_config(host, username, password)
# Restore configuration # backup_file = '192.168.1.1_20210101010101.cfg'
# restore_device_config(host, username, password, backup_file)
This example contains basic functions for backing up and restoring network device configurations. In actual use, we need to make corresponding adjustments based on the actual network environment, device type and configuration requirements.
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