![Understanding DMVPN Phase 1, 2, and 3: A Practical Guide [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/06/Understanding-DMVPN-Phase_networkjourney.png)
I’m here to help you simplify one of the most important VPN technologies used in scalable WAN deployments — Dynamic Multipoint VPN (DMVPN). Whether you’re a network engineer working on real-world WAN rollouts or preparing for your next professional certification, this guide will equip you […]
![Build Your First MPLS L3VPN: CLI + Diagrams + Troubleshooting. [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/06/Build-Your-First-MPLS-L3VPN_CLI_Diagrams_Troubleshooting_networkjourney.png)
I want to walk you through a key topic that continues to dominate enterprise networks and is highly relevant for those preparing for advanced routing certifications: MPLS (Multiprotocol Label Switching). Whether you’re preparing for your certification journey or working in a service provider role, understanding […]
![EIGRP for IPv6 – Routing Smarter in the Next-Gen Network Era. [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/06/Why-Are-Enterprises-and-Service-Providers-Moving-to-NFV_networkjourney.png)
If you’re someone who loves physical routers, switches, and the feel of plugging in those console cables — I totally get you. I started my journey the same way. But guess what? The world is evolving fast, and the network functions we once ran on […]
![Still Using Standard vSwitches? Here's Why DVS Is a Must in 2025 [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/06/Still-Using-Standard-vSwitches_Here_s-Why-DVS-Is-a-Must-in-2025_networkjourney.png)
Today we’re diving into something that every modern network engineer must understand — Virtual Switches. Whether you’re configuring labs in EVE-NG, building enterprise data centers, or managing virtual machines in VMware or Hyper-V, virtual switches (vSwitch and DVS) are everywhere. I remember the first time […]
![How Do Bridge Domains and EPGs Work Together in Cisco ACI?[CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/06/How-Do-Bridge-Domains-and-EPGs-Work-Together-in-Cisco-ACI_networkjourney.png)
Today we’re going deep into a topic that often seems overwhelming at first but becomes incredibly exciting once you get the hang of it — Cisco ACI (Application Centric Infrastructure). When I first started exploring Cisco ACI in customer data center deployments, I found myself […]
![Don’t Let Your Router Crash! Master Control Plane Policing (CoPP) with Labs & CLI [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/07/nj-blog-post-CoPP.jpg)
Ever had one of those moments where your device just locks up, and you can’t even SSH or ping it anymore—even though the CPU is not maxed out? I’ve been there. As someone who’s spent years deep in the trenches of data centers and campus […]
![Still Using SNMPv2? Here’s Why You Must Switch to SNMPv3 Today! [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/07/nj-blog-post-snmpv3.jpg)
Let me tell you a quick story before diving into today’s deep-dive. A few years ago, one of my clients had this weird issue—an attacker was sniffing SNMPv2 traffic and using it to map the entire network. The problem? They thought SNMPv2 was “just fine” […]
![Want to Stop Unauthorized Access? SSH and HTTPS Hardening Explained[CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/07/nj-blog-post-ssh-https.jpg)
when was the last time you audited your device’s remote access methods?I still remember the day when a client called me in panic—someone had brute-forced their router via SSH, and guess what? The router had no access-lists, no username policy, and was running outdated SSHv1. […]
![AAA Authentication with TACACS+ and RADIUS – Step-by-Step Cisco Guide [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/07/nj-blog-post-AAA-TACACS-RADIUS.jpg)
Let me take you back to my early network engineering days. We had 10 routers and 20 engineers—and we used the same username and password across all devices. No logs. No traceability. Just convenience… until one fine day, someone made a change that brought the […]
![Security Zones Explained: From Flat Networks to Fortresses [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/07/nj-blog-post-security-zone.jpg)
Let’s be honest. At some point, we’ve all created a flat network with just a few VLANs and thought — “Yeh toh kaafi secure hai.” Until… a misconfigured ACL or open port lets someone pivot from the user segment to your server VLAN — and […]
