Author: Trainer Sagar Dhawan

OSPF LSA Types Explained: Complete Guide with CLI, EVE-NG Lab & Real-World Use Cases. [CCNP ENTERPRISE]

OSPF LSA Types Explained: Complete Guide with CLI, EVE-NG Lab & Real-World Use Cases [CCNP ENTERPRISE]

Today we’re going to tackle one of the most crucial...

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OSPF Router Types Explained: ABR, ASBR, DR Roles, CLI, Lab & Real-World Examples. [CCNP ENTERPRISE]

OSPF Router Types Explained: ABR, ASBR, DR Roles, CLI, Lab & Real-World Examples [CCNP ENTERPRISE]

In today’s blog, we’re diving into one of the most...

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OSPF Area Types Explained: Stub, Totally Stubby & NSSA with CLI, Lab & Real-World Use Cases. [CCNP ENTERPRISE]

OSPF Area Types Explained: Stub, Totally Stubby & NSSA with CLI, Lab & Real-World Use Cases [CCNP ENTERPRISE]

If you’ve ever felt confused by OSPF area types—like what...

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Mastering EtherChannel Load Balancing Methods: A Complete Guide with CLI & EVE-NG Lab [CCNP ENTERPRISE]

Mastering EtherChannel Load Balancing Methods: A Complete Guide with CLI & EVE-NG Lab [CCNP ENTERPRISE]

we’re diving into one of the most common — yet...

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Access Port vs Trunk Port Explained: Cisco CLI + EVE-NG Labs [2025]. [CCNP ENTERPRISE]

Access Port vs Trunk Port Explained: Cisco CLI + EVE-NG Labs [2025] [CCNP ENTERPRISE]

If you’re diving into VLANs, there’s one thing you must...

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2025 Guide: Overlay vs Underlay in SD-WAN – What’s Changed?[CCNP Enterprise]

2025 Guide: Overlay vs Underlay in SD-WAN – What’s Changed? [CCNP Enterprise]

If you’re anything like my students or clients, you’ve probably...

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Ticket#14 - OSPF Routes Missing: Area Type Mismatch (Stub vs NSSA) Fixed [CCNP Enterprise]

Ticket#14 – OSPF Routes Missing: Area Type Mismatch (Stub vs NSSA) Fixed [CCNP Enterprise]

Problem Summary An enterprise network running OSPF faced missing routes...

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Ticket#13: VLAN Not Propagating Across Switches – VTP Revision Number Conflict Fixed [CCNP Enterprise]

Ticket#13: VLAN Not Propagating Across Switches – VTP Revision Number Conflict Fixed [CCNP Enterprise]

Problem Summary In an enterprise campus network, a new switch...

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Ticket#12: High Packet Loss on WAN Link – Diagnosing QoS Misconfigurations [CCNP Enterprise]

Ticket#12: High Packet Loss on WAN Link – Diagnosing QoS Misconfigurations [CCNP Enterprise]

Problem Summary A branch office reported high packet loss and...

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Ticket#11: BGP Neighbor Flap – Hold Timer Expiry Due to MTU Mismatch [CCNP Enterprise]

Ticket#11: BGP Neighbor Flap – Hold Timer Expiry Due to MTU Mismatch [CCNP Enterprise]

Problem Summary An enterprise experienced intermittent BGP neighbor flaps between...

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