![How Can GRE Tunnel Help Connect Remote Sites? Full Cisco Setup Guide [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/06/How-Can-GRE-Tunnel-Help-Connect-Remote-Sites_networkjourney.png)
I’m bringing you one of the most essential yet often misunderstood technologies in networking — GRE Tunnels. I’ve seen students struggle to understand why or how GRE is used, and I completely understand! When I first came across GRE, I kept wondering how traffic magically […]
![VRF Lite Explained: Real-World Use Cases, Commands & Troubleshooting [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/06/VRF-Lite-Explained_networkjourney.png)
If you’ve ever wondered how service providers keep customer traffic completely isolated even when using the same physical network, or how enterprises segment their internal departments securely, let me introduce you to a real game-changer:VRF Lite. As someone who’s helped countless students and professionals scale […]
![Network Design: High Availability vs Load Balancing – Know When to Choose What? [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/06/Network-Design_High-Availability-vs-Load-Balancing-–-Know-When-to-Choose-What_networkjourney.png)
I want to simplify one of the most misunderstood concepts in enterprise networking—High Availability (HA) versus Load Balancing. Over the years of designing, training, and troubleshooting production networks, I’ve seen engineers confuse these two techniques or treat them as interchangeable. Trust me, understanding their unique […]
![Virtual Network Functions (VNFs) – The Future of Flexible Networking [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/06/Virtual-Network-Functions-_VNFs-–-The-Future-of-Flexible-Networking-_networkjourney.png)
If there’s one shift in the networking landscape that has changed the game in recent years, it’s the rise of Virtual Network Functions (VNFs). I still remember a time when deploying firewalls, load balancers, or WAN optimizers meant racking up physical boxes in data centers. […]
Today we’re talking about one of the most foundational yet misunderstood topics in networking—Control Plane vs Data Plane. I can’t tell you how often I’ve seen even experienced engineers mix up the two, especially when jumping into technologies like SD-WAN, SDN, and Cisco DNA Center. […]
![Redundancy Unleashed: Keeping Enterprise Networks Always-On [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/06/Redundancy-Unleashed_-Keeping-Enterprise-Networks-Always-On_networkjourney.png)
I’ve seen too many organizations suffer massive outages due to a single point of failure—sometimes because of a downed switch, a failed uplink, or even a misconfigured router. In this post, I’ll walk you through the core theory, practical CLI, real-world use cases, and a […]
![Brains Behind Modern Networks: Understanding DNAC, APIC & vManage. [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/06/Brains-Behind-Modern-Networks-Understanding-DNAC-APIC_-vManage_networkjourney.png)
If you’ve ever wondered what’s powering the magic behind modern, intelligent, and self-healing networks — you’re in the right place. Today’s enterprise networks aren’t managed switch-by-switch anymore. We have smart controllers that do the heavy lifting, automate configurations, and even apply intent-based networking. In this […]
![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 […]
Over the last few years, I’ve had the privilege of guiding 1000s of learners into the world of Cisco DevNet, and recently there’s been a major buzz in the tech world — Cisco DevNet is now being rebranded as Cisco Automation.
Now, if you’re wondering, “Is this just a name change or a major shift in direction?”, you’re in the right place. Let me walk you through everything — why this is happening, what’s changing, what stays the same, and most importantly, what it means for your career.
![Should You Upgrade to Spine-Leaf Network Design in 2025? [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/06/Should-You-Upgrade-to-Spine-Leaf-Network-Design_networkjourney.png)
If you’ve been working in networking for a while—especially on legacy campus networks—you’ve probably hit that scaling wall. You know the one: too many hops, inconsistent latency, unpredictable East-West traffic behavior, and painful troubleshooting. That’s where Spine-Leaf architecture enters the picture. In this post, I’ll […]
