![[Day #88 PyATS Series] Write Unit Tests for Your pyATS Libraries (Pytest) Using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/09/Day-88-PyATS-Series-Write-Unit-Tests-for-Your-pyATS-Libraries-Pytest-Using-pyATS-for-Cisco-Python-for-Network-Engineer.png)
Introduction on the Key Points Welcome to Day #87 of our 101 Days of pyATS (Vendor-Agnostic) series, where we focus on elevating your network automation workflows into production-grade frameworks. In this Article, we will deep-dive into writing unit tests for pyATS libraries using Pytest, an […]
![[Day #87 PyATS Series] Automated RMA Device Onboarding (Multi-Vendor) Using pyATS for Cisco [Python for Network Engineer]](https://networkjourney.com/wp-content/uploads/2025/09/Day-87-PyATS-Series-Automated-RMA-Device-Onboarding-Multi-Vendor-Using-pyATS-for-Cisco-Python-for-Network-Engineer.png)
Introduction on the Key Points Efficient device onboarding is essential in maintaining the health and scalability of modern networks, especially when dealing with RMA (Return Merchandise Authorization) processes. Replacing faulty network devices and integrating new hardware into production environments can be complex and error-prone when […]
![[Day #69 PyATS Series] Automate NTP stratum consistency check using pyATS for Cisco](https://networkjourney.com/wp-content/uploads/2025/09/Day-69-PyATS-Series-Automate-NTP-stratum-consistency-check-using-pyATS-for-Cisco.png)
Introduction — key points Time is everything on a network. NTP (Network Time Protocol) correctness is foundational — wrong time breaks logs, certificates, security tokens, RADIUS, syslog correlation, HA elections and more. The specific goal of this Article is to automate an NTP stratum consistency […]
![[Day #68 PyATS Series] Check end-to-end multicast routing across domains using pyATS for Cisco](https://networkjourney.com/wp-content/uploads/2025/09/Day-68-PyATS-Series-Check-end-to-end-multicast-routing-across-domains-using-pyATS-for-Cisco.png)
Introduction — what you will accomplish and why it matters Multicast is notoriously brittle in multi-domain environments. When sources and receivers sit in different routing or administrative domains (for example, two autonomous OSPF areas, or two administrative networks connected via BGP), problems happen: RPF failures, […]
![[Day #15 PyATS Series] Building a Reusable Test Template for All Vendors using pyATS for Cisco – Python for Network Engineer](https://networkjourney.com/wp-content/uploads/2025/07/Day15-PyATS-Series-Building-a-Reusable-Test-Template-for-All-Vendors-using-pyATS-for-Cisco-Python-for-Network-Engineer.png)
Introduction Welcome to Day 15 of the 101 Days of pyATS (Vendor-Agnostic) journey. As a network engineer stepping into the world of automation, one of the first challenges you’ll face is code duplication. When you manage networks with multiple vendors—Cisco, Arista, Palo Alto, Fortinet—it’s common […]
![Mastering IPv6 Routing: A Complete Guide with Labs, CLI & FAQs [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/07/nj-blog-post-IPv6-routing.jpg)
If you’re reading this, you’re either deep into the world of IPv6 already or you’re preparing to face it soon. IPv6 is no longer just a future plan—it’s the reality of today’s networks, especially with the exhaustion of IPv4. If you’ve ever wondered “How does […]
![Route Redistribution with Tagging – Mastering Controlled Routing Across Protocols [ CCNP ENTERPRISE ]_networkjourney](https://networkjourney.com/wp-content/uploads/2025/06/Route-Redistribution-with-Tagging-–-Mastering-Controlled-Routing-Across-Protocols-CCNP-ENTERPRISE-.png)
Today we’re diving deep into a topic that often haunts network engineers during real-world implementations and certifications like CCNP or CCIE — Route Redistribution with Tagging. I still remember a consulting project where a simple redistribution misstep created routing loops and service disruption across multiple […]
![iBGP vs eBGP Differences – A Deep Dive with Real-World Examples [ CCNP ENTERPRISE ]_networkjourney](https://networkjourney.com/wp-content/uploads/2025/06/iBGP-vs-eBGP-Differences-–-A-Deep-Dive-with-Real-World-Examples.png)
Today I’m diving into one of the most fundamental yet often misunderstood topics in BGP – the difference between iBGP and eBGP. Whether you’re prepping for CCNA/CCNP or working on a real enterprise network, understanding these two forms of BGP peering is absolutely essential. I […]
![On-Prem vs Cloud Controllers – Which One Powers Your Network Better? [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/06/On-Prem-vs-Cloud-Controllers_networkjourney.png)
I want to talk to you about something every modern network engineer must understand — Controllers, and more importantly, the difference between On-Prem and Cloud Controllers. Back in the day, managing a network meant having your hands on physical boxes, CLI screens, and local NMS […]
![Two-Tier vs Three-Tier Network Architecture – Complete Guide with EVE-NG Lab & CLI [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/06/Two-Tier-vs-Three-Tier-Network-Architecture_networkjourney-1.png)
In this post, I’ll break down Two-Tier and Three-Tier Network Architecture in simple terms, just like I do in my instructor-led classes. By the end, you’ll not only understand these models but also see how to configure and simulate them using EVE-NG. In enterprise network […]
