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Version Control for Network Configs – Bring Git-Like Power to Your Routers! [CCNP ENTERPRISE]_networkjourney
  • Trainer Sagar Dhawan
  • Posted on July 11, 2025
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Version Control for Network Configs – Bring Git-Like Power to Your Routers! [CCNP ENTERPRISE]

I’ve seen this scenario more times than I can count: “Who changed the switch config and broke VLAN access?” or “Why was BGP removed from this router yesterday?” These are not just frustrating moments; they’re productivity killers. That’s where version control for network configurations comes […]

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Multicast in SD-WAN and Cloud Networks – Bringing One-to-Many to the Next Gen WAN [CCNP ENTERPRISE]_networkjourney
  • Trainer Sagar Dhawan
  • Posted on July 11, 2025
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Multicast in SD-WAN and Cloud Networks – Bringing One-to-Many to the Next Gen WAN [CCNP ENTERPRISE]

In this blog post, I’ll walk you through everything—from how multicast works (or breaks) in SD-WAN to cloud-native alternatives for multicast delivery, along with CLI examples, EVE-NG labs, and real-world use cases. Let’s dive into how the one-to-many paradigm is adapting to modern WAN architecture. […]

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Troubleshooting Multicast in Enterprise – From Chaos to Clarity [CCNP ENTERPRISE]_networkjourney
  • Trainer Sagar Dhawan
  • Posted on July 10, 2025
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Troubleshooting Multicast in Enterprise – From Chaos to Clarity [CCNP ENTERPRISE]

Today we’ll dive deep into the art and science of troubleshooting multicast in enterprise networks. This post is for engineers who are tired of “guesswork” and want step-by-step strategies to solve real multicast challenges—whether it’s IPTV not streaming or CCTV video dropouts. We’ll pair concepts […]

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IGMP Snooping and Configuration – Mastering Multicast Efficiency [CCNP ENTERPRISE]_networkjourney
  • Trainer Sagar Dhawan
  • Posted on July 10, 2025
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IGMP Snooping and Configuration – Mastering Multicast Efficiency [CCNP ENTERPRISE]

Today’s article is all about IGMP Snooping—a crucial Layer 2 switch feature that ensures multicast traffic only reaches the devices that actually asked for it. Whether you’re preparing for CCNP or managing an enterprise network, understanding IGMP Snooping is a must. Let’s break it down […]

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Multicast Basics and PIM Overview – Smarter Traffic Delivery in Modern Networks [CCNP Enterprise]_networkjourney
  • Trainer Sagar Dhawan
  • Posted on July 10, 2025
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Multicast Basics and PIM Overview – Smarter Traffic Delivery in Modern Networks [CCNP Enterprise]

Have you ever wondered how a single video stream from one server reaches hundreds or even thousands of users without consuming all the bandwidth on your network? That’s where Multicast comes in—it’s like broadcasting but smarter! As a trainer, I often tell my students, “If […]

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Mastering Ping and Traceroute: Advanced Options Every Network Engineer Should Know [CCNP Enterprise]
  • Trainer Sagar Dhawan
  • Posted on July 8, 2025
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Mastering Ping and Traceroute: Advanced Options Every Network Engineer Should Know [CCNP Enterprise]

We’re diving into the tools you’ve used since day one—ping and traceroute—but with a twist. These commands are more powerful than most people realize. Sure, you know how to ping a server, but did you know you can set the packet size, use extended options, […]

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ACLs: Named vs Numbered – Which One Should You Use? [CCNP ENTERPRISE]
  • Sagar Dhawan
  • Posted on July 7, 2025
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ACLs: Named vs Numbered – Which One Should You Use? [CCNP ENTERPRISE]

Access Control Lists (ACLs) are among the first tools you reach for when you want to secure or control traffic. But when it comes to Named vs Numbered ACLs, many learners (and even working professionals) hesitate — unsure which one to use, when, and why. […]

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Can ARP ACLs Replace DHCP Snooping for ARP Security? Let’s Find Out! [CCNP ENTERPRISE]
  • Sagar Dhawan
  • Posted on July 7, 2025
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Can ARP ACLs Replace DHCP Snooping for ARP Security? Let’s Find Out! [CCNP ENTERPRISE]

I always say in my trainings — “Security doesn’t start at the firewall; it starts at the access port.” You’d be surprised how easy it is for an attacker to spoof an ARP reply and become the man-in-the-middle in your enterprise network. This is where […]

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Mastering DHCP Snooping and Binding Table: Secure Your Layer 2 Network Like a Pro [CCNP ENTERPRISE]
  • Sagar Dhawan
  • Posted on July 7, 2025
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Mastering DHCP Snooping and Binding Table: Secure Your Layer 2 Network Like a Pro [CCNP ENTERPRISE]

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, […]

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From Zero to Secure: 802.1X + MAB CLI Walkthrough with Labs[CCNP ENTERPRISE]
  • Sagar Dhawan
  • Posted on July 7, 2025
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From Zero to Secure: 802.1X + MAB CLI Walkthrough with Labs [CCNP ENTERPRISE]

I am going to simplify one of the most powerful port-based access control mechanisms in enterprise networking — 802.1X with MAB (MAC Authentication Bypass). When configured properly, it ensures secure access for both corporate-managed devices and non-802.1X-capable endpoints like printers, IP phones, or legacy hardware. […]

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