Network Automation with Python Netmiko

Set up a net micro environment on Linux, create a Python virtual environment, install the Mico library, and verify SSH connectivity to devices while exploring the network topology.

Connect to the device using net connect, send commands with timing, and print outputs while adjusting a local or global delay factor to manage timeouts in Netmiko.

Learn parsing theory for network automation by converting show ip interface brief outputs into json or dictionary formats using text FSM module, with colorama to colorize up and down statuses.

Parse command outputs with TextFSM and pretty print, colorize interface status, and compare raw versus parsed results in a Python Netmiko lab using Jenny for structured parsing.

explains multithreading vs multiprocessing, showing how a thread pool executor and concurrent futures enable concurrent tasks with shared memory and lighter overhead, suitable for io operations and data processing.

Explore multithreading by comparing sequential and concurrent device connections, measure execution time with time and sleep, and implement a map-based parallel approach to connect to R1, R2, and R3.

Learn to use connect handler as the core method by building a device dictionary with vendor and operating system, then connect to devices using context managers and fetch the prompt.

Learn to use Netmiko connect_handler to connect to Cisco IOS devices, print prompts, and auto-disconnect with a context manager; explore unpacking devices and multi-device loops.

Explore configuration theory in network automation with Netmiko by using send_command for single commands and send_config_set for multi-step configurations, including command accumulation and saving to memory.

Connect to a device with Netmiko, run show commands, and elevate to enable or config mode to configure a loopback interface, then save to startup config using send_config_set.

Learn to pull configurations from text files with send config from file and templates for ospf and bgp, and log sessions to a text file using the Python logging module.

Learn to connect to a Cisco device with netmiko, enable logging and save session output to a file, then configure OSPF from a text file and verify with show commands.

Learn to handle prompts and accumulate outputs in netmiko using send_command_timing. Set the delay factor to a multiple of 100 to prevent timeouts on long operations.