Tag: network topology
CCNA January 5, 2020

Mastering EIGRP Router ID Configuration

EIGRP router ID is a 32-bit unique identifier identifying the router in the EIGRP domain. The router ID (RID) is represented in the same way as the IPv4 address. The router ID is used both in EIGRP and OSPF, while the role of the router ID is more significant in OSPF. EIGRP automatically selects the […]
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Understanding default gateway limitations in computer networks
CCNA November 1, 2019

Default Gateway Limitations: Impact on Connectivity and Performance

Hosts at the access layer of a hierarchical network take advantage of the alternate default gateways. If a gateway (router interface) fails, the hosts configured with that gateway are cut off from outside networks. A method is needed to provide alternate default gateways in switched networks where two or more routers are connected to the […]
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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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Pie chart showing Fixed-Length Subnet Masking (FLSM) with eight equal subnets labeled Net-0 to Net-7 in blue gradients
CCNA August 27, 2019

Fixed-Length Subnet Masking (FLSM) Exclusive Explanation

Fixed-Length Subnet Masking (FLSM), also known as traditional or classful subnetting, is a foundational concept in IP addressing that CCNA students must master before advancing to more efficient techniques like VLSM in CCNP. In FLSM, an equal number of addresses is allocated to each subnet using a uniform mask length, which simplifies routing in internal […]
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Diagram of Router1 with directly connected static IPv6 route and routing table
CCNA August 27, 2019

Configure a Directly Connected Static IPv6 Route

The directly connected static IPv6 route is the best routing solution when CEF is not working on the router. In the old Cisco IOs before 12.0 versions, this is the best solution to avoid recursive routing. It is also the best in point-to-point networks. It is also the best alternative to using the next-hop IPv6 […]
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CCNA August 24, 2019

Master How to configure Static Route – IPv4 and IPv6 (Updated 2025)

We can configure static or dynamic routes after configuring directly connected interfaces. Static routes are manually configured and provide a clear path between two networking devices. However, they must be manually reconfigured if the network topology changes, which is the main disadvantage of static routes. It is more secure and efficient than dynamic routes. It […]
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