Day: July 18, 2025

[DAY#1 PyATS Series] What Is PyATS & Genie? Why Vendor‑Agnostic Testing? (Ping Tests) Using pyATS (Cisco/Arista/Paloalto/Fortigate) [Python for Network Engineer]

[DAY#1 PyATS Series] What Is PyATS & Genie? Why Vendor‑Agnostic Testing? (Ping Tests) Using pyATS (Cisco/Arista/Paloalto/Fortigate) [Python for Network Engineer]

Introduction on the Key Points Today we dive into pyATS...

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Ticket#5 - OSPF Neighbor Stuck in INIT/2WAY – How to Diagnose and Resolve [CCNP ENTERPRISE]

Ticket#5 – OSPF Neighbor Stuck in INIT/2WAY – How to Diagnose and Resolve [CCNP ENTERPRISE]

Problem Summary An enterprise network reported intermittent OSPF adjacency issues...

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Ticket#4 - BGP Route Not Installing in RIB – Path Attributes and Fix [CCNP Enterprise]

Ticket#4 – BGP Route Not Installing in RIB – Path Attributes and Fix [CCNP Enterprise]

Problem Summary A network engineer noticed that a BGP route...

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Ticket#3 - VLAN Mismatch: End Users Unable to Reach Gateway – A Real Cisco Fix [CCNP ENTERPRISE]

Ticket#3 – VLAN Mismatch: End Users Unable to Reach Gateway – A Real Cisco Fix [CCNP ENTERPRISE]

Problem Summary Multiple end-users on the 3rd floor raised a...

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Ticket#2 - Server Not Reachable – Tracing Next-Hop Failure and Fix [CCNP ENTERPRISE

Ticket#2 – Server Not Reachable – Tracing Next-Hop Failure and Fix [CCNP ENTERPRISE]

Problem Summary A ticket was raised from the IT Helpdesk...

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Ticket#1-Enterprise Slowness: High CPU on Core Switch – Step-by-Step Troubleshooting [CCNP ENTERPRISE]

Ticket#1-Enterprise Slowness: High CPU on Core Switch – Step-by-Step Troubleshooting [CCNP ENTERPRISE]

Problem Summary A major enterprise customer reported intermittent slowness across...

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The Ultimate IPv6 Troubleshooting Guide: Tools, Tips, and Labs [CCNP ENTERPRISE]

The Ultimate IPv6 Troubleshooting Guide: Tools, Tips, and Labs [CCNP ENTERPRISE]

If you’ve ever been stuck with “Why isn’t my IPv6...

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Dual Stack vs Tunneling: Which IPv6 Transition Strategy is Right for You? [CCNP ENTERPRISE]

Dual Stack vs Tunneling: Which IPv6 Transition Strategy is Right for You? [CCNP ENTERPRISE]

If you’re reading this, you’re probably at that point in...

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Mastering IPv6 Routing: A Complete Guide with Labs, CLI & FAQs [CCNP ENTERPRISE]

Mastering IPv6 Routing: A Complete Guide with Labs, CLI & FAQs [CCNP ENTERPRISE]

If you’re reading this, you’re either deep into the world...

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Your First Step into IPv6: Address Types, Labs, CLI & Real-World Use Cases [CCNP ENTERPRISE]

Your First Step into IPv6: Address Types, Labs, CLI & Real-World Use Cases [CCNP Enterprise]

When I started teaching networking years ago, IPv4 was king....

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