![[Day #35 Pyats Series] Parsing and validating access-lists (ACLs) using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Parsing-and-validating-access-lists-ACLs-using-pyATS-for-Cisco.png)
Introduction on the Key Points Welcome to Day #35 of our “101 Days of pyATS (Vendor-Agnostic)” series exclusively designed for Network Engineers looking to automate their environments with ease. In today’s article, we’re focusing on Parsing and Validating Access-Control Lists (ACLs) using pyATS and Genie […]
![[Day #37 Pyats Series] Hardware inventory collection & reporting using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Hardware-inventory-collection-reporting-using-pyATS-for-Cisco.png)
Introduction on the Key Points Welcome back to the “101 Days of pyATS (Vendor-Agnostic)” series—your go-to hands-on lab journal to automate real-world network tasks. On Day #37, we’re diving into a critical yet often manually performed task—hardware inventory collection. Imagine this: you need to collect […]
![[Day #54 Pyats Series] NETCONF validation for Cisco/Arista/Paloalto/Fortigate using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/NETCONF-validation-for-Cisco-Arista-Paloalto-Fortigate-using-pyATS-for-Cisco.png)
Introduction on the Key Points In the network automation world, NETCONF stands out as a powerful protocol to manage network devices in a structured, model-driven way. It uses YANG data models over SSH, providing fine-grained control, consistency, and programmability. In today’s post of our “101 […]
![[Day #53 Pyats Series] RESTCONF validation for Cisco IOS-XE using pyATS for Cisco [Python for Network Engineer] Introduction](https://networkjourney.com/wp-content/uploads/2025/08/RESTCONF-validation-for-Cisco-IOS-XE-using-pyATS-for-Cisco.png)
Introduction In today’s modern network automation era, ensuring API-based management protocols like RESTCONF are correctly configured and functioning is crucial for integrating controllers, orchestrators, or custom-built Python scripts for network interaction. In this Day #53 of our “101 Days of pyATS (Vendor-Agnostic)” series, we’ll walk […]
![[Day #57 PyATS Series] Change Management Validation for ACL Updates Using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Day-57-PyATS-Series-Change-Management-Validation-for-ACL-Updates-Using-pyATS-for-Cisco.png)
Introduction — key points Access Control Lists (ACLs) are one of the most powerful — and risky — configuration constructs in a network. A misplaced line, wrong sequence number, or an overly-broad permit can either block business traffic or expose services. For any ACL change […]
![[Day #56 PyATS Series] Automating Pre/Post Config Change Checks (Brownfield) Using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Day-56-PyATS-Series-Automating-Pre_Post-Config-Change-Checks-Brownfield-Using-pyATS-for-Cisco.png)
Introduction on the key points When working in a brownfield network, every configuration change carries risk. You must verify what is there now (pre-check), apply a change under controlled conditions, and verify what changed (post-check). Doing this manually is slow and error-prone — especially across […]
![[Day#60 PyATS Series] Building Reusable Validation Libraries (Multi-Vendor) using pyATS [Python for Network Engineers]](https://networkjourney.com/wp-content/uploads/2025/08/Day-60-PyATS-Series-Building-Reusable-Validation-Libraries-Multi-Vendor-Using-pyATS-for-Cisco.png)
Introduction — key points As a network engineer moving into automation, one of the most valuable skills is creating reusable validation libraries: small, well-tested units (functions/classes) that encapsulate checks like “BGP neighbor up”, “interface up”, “ACL contains permit for X”, or “ospf adjacency count”. Reuse […]
![[Day #59 PyATS Series] Detect Split-Horizon Issues in Large Networks Using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Day-59-PyATS-Series-Detect-Split-Horizon-Issues-in-Large-Networks-Using-pyATS-for-Cisco.png)
Introduction — key points Split-horizon and related route-advertisement problems are subtle but catastrophic in large networks: routes sometimes don’t propagate where they should, or — worse — are advertised back like a boomerang creating loops. Detecting these issues at scale requires automation, consistent evidence (raw […]
![[Day #51 PyATS Series] Custom Parser for Unsupported Cisco/Arista/PaloAlto/Fortigate Commands using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Day-51-PyATS-Series-Custom-Parser-for-Unsupported-Cisco_Arista_PaloAltoFortigate-Commands-using-pyATS-for-Cisco.png)
Introduction — key points When automating network validation with pyATS and Genie you often rely on built-in parsers (device.parse(‘show …’)). But real networks contain vendor commands, feature flags, or platforms that Genie does not parse yet — or you have a bespoke command that prints […]
![[Day #46 Pyats Series] Validate QoS policy configurations using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/08/Validate-QoS-policy-configurations-using-pyATS-for-Cisco.png)
Introduction on the Key Points Welcome to Day 46 of the 101 Days of pyATS (Vendor-Agnostic) series! In today’s lab-driven session, we’re focusing on validating QoS (Quality of Service) policy configurations using Cisco’s pyATS and Genie framework. Whether you’re managing enterprise WANs, campus LANs, or […]
