![Ticket#24: Routing Table Blackhole – Route Redistribution Loop Detected Between OSPF and BGP [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/07/Ticket24_Routing-Table-Blackhole-–-Route-Redistribution-Loop-Detected-Between-OSPF-and-BGP_networkjourney.png)
Problem Summary An enterprise site experienced sporadic loss of connectivity to external services and some internal prefixes. The issue appeared after a change request to redistribute OSPF into BGP and vice versa at the WAN edge. Symptoms Observed Example output: Root Cause Analysis The team […]
![Loop Prevention Techniques – Keeping Your Network Stable and Efficient [CCNP ENTERPRISE]_networkjourney](https://networkjourney.com/wp-content/uploads/2025/07/Loop-Prevention-Techniques-–-Keeping-Your-Network-Stable-and-Efficient-CCNP-ENTERPRISE.png)
We’re going to unravel one of the most critical topics in networking — Loop Prevention Techniques. If you’ve ever spent hours troubleshooting unstable networks, flapping routes, or broadcast storms, chances are, you’ve come face-to-face with some sort of looping issue. In the classroom or during […]
![Route Maps vs Prefix Lists – A Deep Dive for Real-World Networking [ CCNP ENTERPRISE ]_networkjourney](https://networkjourney.com/wp-content/uploads/2025/06/Route-Maps-vs-Prefix-Lists-–-A-Deep-Dive-for-Real-World-Networking-CCNP-ENTERPRISE-.png)
If you’ve ever sat there staring at your router’s CLI wondering whether to use a route map or a prefix list, you’re not alone. I’ve seen many students — even working professionals — struggle with this subtle yet powerful decision. Today, I’ll walk you through […]
![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 […]
