![[Day 8] Cisco ISE Mastery Training: Integrating ISE with Active Directory](https://networkjourney.com/wp-content/uploads/2025/08/Day-8-Cisco-ISE-Mastery-Training-Integrating-ISE-with-Active-Directory.png)
Introduction Active Directory (AD) is the source of truth for user identities in most enterprises. Integrating Cisco ISE with AD lets ISE make real-time decisions based on user identity and group membership — mapping AD groups to network access policies, applying departmental VLANs, or enabling […]
![Ticket#10 - NAT Overload Failure: Why Users Couldn't Access the Internet – A Real Fix [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/07/nj-blog-post-Ticket-10.jpg)
Problem Summary In a mid-sized enterprise, users across VLANs suddenly reported that they couldn’t browse the internet or access external services. While internal services like file sharing and internal DNS were operational, anything beyond the firewall was unreachable. Symptoms Observed Root Cause Analysis Initial checks […]
![2025 Guide: Overlay vs Underlay in SD-WAN – What’s Changed?[CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/06/Overlay-vs-Underlay-in-SD-WAN_networkjourney-1.png)
If you’re anything like my students or clients, you’ve probably heard the words “overlay” and “underlay” thrown around constantly in the world of SD-WAN. But in 2025, how much do you really understand about how these layers work—and more importantly, how they’ve evolved? Today, we’re […]
![Cloud Networking Made Simple: Dive into IaaS, PaaS & SaaS [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/06/Cloud-Networking-Made-Simple_-Dive-into-IaaS_-PaaS_SaaS_networkjourney.png)
If you’re still scratching your head over the differences between IaaS, PaaS, and SaaS, you’re not alone. I remember the first time I tried to wrap my head around these concepts—it was confusing, full of buzzwords, and felt a bit too “cloudy” to grasp clearly. […]
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. […]
![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 […]
