Cisco pyATS vs Netmiko

Cisco pyATS is a Python framework for network testing, automation, and validation, available free under the Apache 2.0 license. It supports sanity, feature, solution, system, and scale test and verification workflows, with reusable data-driven tests ranging from simple checks to complex asynchronous suites. Genie libraries provide device connectivity, parsers, APIs, platform-agnostic feature models, reusable test cases, and a YAML-driven test runner. Built-in device libraries cover Cisco IOS, IOS XE, IOS XR, NX-OS, and ASA; plugins and extensions can add other platforms. Connections can use CLI, NETCONF, or RESTCONF. XPRESSO manages test suites, environments, testbeds, resources, live test views, and archived results with comparisons and analytics. It supports on-demand, bundled, and scheduled runs through Jenkins and Docker backends. Cisco also documents Ansible community integrations and out-of-the-box RobotFramework support. pyATS runs on Linux and macOS and supports self-hosted deployment. Cisco says more than 75% of its codebase is open source on GitHub. Email support is best-effort and usually receives a reply within a day.

Netmiko is a free Python library for connecting to network devices and automating command-line tasks. It simplifies SSH connections and also documents supported Telnet device types. The library can collect output from show commands and make configuration changes while handling low-level device state. Its device list spans vendors and separates platforms by regular, limited, and experimental testing status. Regularly tested examples include Arista vEOS, Cisco IOS variants and NX-OS, Juniper Junos, and Linux. Documentation shows how to install with pip, connect to devices, run commands such as “show ip int brief,” and send configuration command sets that enter configuration mode. The project also links to API documentation, a secure copy tutorial, and guidance on using TextFSM. Optional extras support the bulk-encryption CLI and compatibility with Paramiko 4. Netmiko Tools can encrypt sensitive YAML values using Fernet or AES128; the guidance recommends protecting the key and keeping it out of version control. The project uses the MIT license, with bug reports and feature requests directed to GitHub issues.