![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. […]
![QOS Diagnose & Fix Network Performance Issues [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/07/QOS_Diagnose_Fix-Network-Performance-Issues_networkjourney.png)
If you’ve ever hit the panic button because your VoIP calls are choppy or your video stream froze mid-presentation, I feel your pain. Just this morning, I was on a call that sounded like we were underwater—definitely not the crisp audio I expect! That’s when […]
![Mastering Ping and Traceroute: Advanced Options Every Network Engineer Should Know [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/07/Mastering-Ping-and-Traceroute_Advanced-Options-Every-Network-Engineer-Should-Know_networkjourney.png)
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, […]
![Troubleshooting HSRP – How to Detect and Fix Gateway Redundancy Issues [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/07/Troubleshooting-HSRP-–-How-to-Detect-and-Fix-Gateway-Redundancy-Issues_networkjourney.png)
If you’ve ever set up a highly available network and found that clients were still complaining about packet drops or intermittent internet, there’s a good chance HSRP was either misconfigured or malfunctioning. Troubleshooting HSRP (Hot Standby Router Protocol) can be tricky if you’re not familiar […]
![Troubleshooting STP Flapping: Fix Network Instability with Confidence [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/07/Troubleshooting-STP-Flapping-Fix-Network-Instability-with-Confidence_networkjourney-1.png)
Today I want to walk you through a problem that many of us face in real-world environments—STP flapping. If you’ve ever dealt with mysterious connectivity drops, unstable MAC tables, or users yelling, “The network is slow!” with no obvious root cause—there’s a good chance Spanning […]
![Mastering SPAN and RSPAN Configuration – A Deep Dive for Real-World Network Monitoring [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/07/Mastering-SPAN-and-RSPAN-Configuration-–-A-Deep-Dive-for-Real-World-Network-Monitoring_networkjourney.png)
When it comes to network troubleshooting and traffic analysis, capturing the right packets at the right place makes all the difference. How SPAN and RSPAN work behind the scenes—this post is tailor-made for you. Today, we’ll simplify a topic that often looks intimidating in textbooks […]
![Cisco Debug vs Show Commands: Deep Dive for Network Troubleshooting [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/07/Cisco-Debug-vs-Show-Commands-Deep-Dive-for-Network-Troubleshootingnetworkjourney.png)
If you’ve ever been stuck troubleshooting a stubborn routing issue or chasing down why BGP isn’t forming, you know that sometimes a simple show command gives you just the picture—but not the full story. That’s where debug steps in. In this guide, I’ll break down […]
![Wireshark Filter Mastery: Pro-Level Tips for Layer 2 & Layer 3 Packet Analysis [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/07/Wireshark-Filter-Mastery_Pro-Level-Tips-for-Layer-2_Layer-3-Packet-Analysis_networkjourney.png)
As a network trainer and hands-on engineer, I’ve seen engineers struggle not with capturing packets—but with filtering them effectively in Wireshark. Trust me, if you don’t filter the noise, your packet captures become digital haystacks. That’s why in this post, I’m sharing battle-tested Wireshark filter […]
![Mastering IP SLA in Cisco Networks: Setup, Configuration & Real-World Use Case [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/07/Mastering-IP-SLA-in-Cisco-Networks-Setup-Configuration-Real-World-Use-Case_networkjourney.png)
As someone who’s been deep into routers and switches for over a decade, I’ve seen how critical IP SLA becomes when ensuring uptime and performance in real-world networks. Whether you’re working in enterprise, ISP, or data center environments—knowing how to configure, monitor, and troubleshoot IP […]
