Tag: spanning tree protocol
CCNA October 31, 2019

How to Troubleshoot Spanning-Tree Protocol

In most networks, the best Spanning-Tree Protocol topology is determined as part of the network blueprint. The Spanning-Tree Protocol is implemented by configuring Spanning-Tree Protocol priority and cost values. Several things could go wrong. You can expect something, but your switches can give you something different. Situations also occur when the Spanning-Tree Protocol was not […]
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Network diagram of Rapid PVST+ on Cisco switches showing per-VLAN root bridges and instances for VLANs 1, 2, and 3.
CCNA October 30, 2019

Master How to Configure Spanning-Tree Mode – Rapid PVST+ (Updated 2025)

As a cornerstone of Layer 2 redundancy in Cisco networks, Rapid Per-VLAN Spanning Tree Plus (Rapid PVST+) is essential for CCNA 200-301 exam candidates and CCNP ENCOR professionals alike. This guide walks you through configuration, labs, troubleshooting, and best practices to master “how to configure Rapid PVST+ on Cisco Catalyst switch CCNA lab” scenarios. Whether […]
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Network diagram showing spanning tree configuration with bridge IDs and VLANs
CCNA October 28, 2019

How to Configure PortFast and BPDU Guard—Explained

Updated November 26, 2025 – This guide covers PortFast and BPDU Guard configurations for CCNA (200-301) and CCNP (ENARSI) exams, including labs, best practices, and RSTP integrations. Ideal for students asking, “What is PortFast and how do I enable it on a Cisco switch for CCNA?” The switch port directly connected to an end station […]
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Network diagram showing spanning tree configuration with bridge IDs and VLANs
CCNA October 27, 2019

How to Configure Spanning-Tree Bridge ID – Briefly Explained

When configuring a specific switch as a root bridge, the bridge ID priority value must be adjusted to be lower than the bridge priority values of all the other switches on the network. There are two different methods for configuring the bridge priority value on a Cisco Catalyst switch. Method 1 To ensure the switch […]
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Diagram illustrating inter-VLAN routing using Switch Virtual Interface (SVI) on a Layer 3 switch connecting VLAN 100 (192.168.100.0/24) and VLAN 200 (192.168.200.0/24) with sample PCs.
CCNA August 25, 2019

What is Switch Virtual Interface (SVI) – Everything to Know

Switch Virtual Interfaces (SVIs) are a cornerstone of modern enterprise networking, enabling efficient inter-VLAN routing on multilayer switches. This guide, designed for CCNA and CCNP students, explores the evolution of Layer 2 and Layer 3 switching, SVI configuration, verification, troubleshooting, and real-world applications. Whether you’re preparing for certification exams or deploying networks, this article provides […]
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