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 […]
![Security Zones Explained: From Flat Networks to Fortresses [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/07/nj-blog-post-security-zone.jpg)
![Git and GitHub for Network Engineers – Version Control Made Easy [CCNP ENTERPRISE]_networkjourney](https://networkjourney.com/wp-content/uploads/2025/07/Git-and-GitHub-for-Network-Engineers-–-Version-Control-Made-Easy-1.png)
Today I want to share something that totally transformed the way I manage and automate my network configurations — Git and GitHub. I still remember those days when I used to create backups of configs manually, store them in random folders, and name them like […]
![DSCP vs CoS & Trust Boundary: Network Marking Demystified for Engineers[CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/07/DSCP-vs-CoS-Trust-BoundaryNetwork-Marking-Demystified-for-Engineers_networkjourney.png)
If you’re anything like me, you’ve spent late nights wrestling with traffic marking and trust boundaries—wondering which to use where, and how to keep your network playing nice. It’s like juggling apples, oranges, and cherries—but don’t worry, we’ll make it smooth as butter together. Stick […]
![Configuring QoS on Cisco Devices: Boost Performance & Ensure Traffic Priority [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/07/Configuring-QoS-on-Cisco-Devices_Boost-Performance_Ensure-Traffic-Priority_networkjourney.png)
I know those moments when your VOIP calls crackle or your video meetings lag during business hours—it’s like trying to have a conversation through a wall! Over the years, I’ve learned that configuring Quality of Service (QoS) on Cisco devices can be a true game-changer. […]
![Mastering Syslog Levels and Configuration in Cisco Networks [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/06/Mastering-Syslog-Levels-and-Configuration-in-Cisco-Networks_networkjourney.png)
We’re diving into one of the most underutilized yet powerful tools in network troubleshooting—Syslog. Whether you’re a CCNA, CCNP aspirant, or a working professional in a NOC/SOC environment, having a deep understanding of Syslog Levels and Configuration will save you hours of guesswork and help […]
![Mastering DHCP Snooping and Binding Table: Secure Your Layer 2 Network Like a Pro [CCNP ENTERPRISE]](https://networkjourney.com/wp-content/uploads/2025/07/nj-blog-post-dhcp-snooping-binding-table.jpg)
I’ve had this discussion countless times with my students — “What if someone plugs in a rogue DHCP server and hijacks the IP allocation process?” Trust me, this isn’t just a theoretical concern. In modern LAN environments like shared offices, college campuses, and enterprise floors, […]
![Administrative Distance Chart – Explained with CLI, Lab, Use Cases & FAQs [ CCNP ENTERPRISE ]_networkjourney](https://networkjourney.com/wp-content/uploads/2025/06/Administrative-Distance-Chart-–-Explained-with-CLI-Lab-Use-Cases-FAQs-CCNP-ENTERPRISE-.png)
If you’re diving into routing protocols or just wrapping your head around how your router picks the “best” path, you must understand the concept of Administrative Distance (AD). Think of AD like trust levels among friends. You’ve got friends (routing protocols) like OSPF, EIGRP, RIP, […]
![Routing Table Lookup Process – Explained with Lab & CLI [ CCNP ENTERPRISE ]_networkjourney](https://networkjourney.com/wp-content/uploads/2025/06/Routing-Table-Lookup-Process-–-Explained-with-Lab-CLI-CCNP-ENTERPRISE-.png)
Today I’m going to deep-dive into a very important yet often overlooked concept – the Routing Table Lookup Process. Many of my students know how to configure OSPF, BGP, or EIGRP, but when asked “How does a router actually choose the best route when multiple […]
![PBR Configuration with Match Statements [ CCNP ENTERPRISE ]_networkjourney](https://networkjourney.com/wp-content/uploads/2025/06/PBR-Configuration-with-Match-Statements-CCNP-ENTERPRISE-.png)
Ever found yourself in a situation where you wanted to override the default routing decisions of your router? Maybe route specific traffic over a particular WAN link? That’s where Policy-Based Routing (PBR) becomes your best friend. In my experience training hundreds of engineers, I’ve seen […]
![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 […]