What Is Cisco Catalyst Center? An Engineer's Overview
Cisco's campus controller without the brochure gloss: what Catalyst Center actually does, the real deployment and licensing model, what it is not, and when it earns its place.
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Latest posts — page 68
Networking Devices Explained for Beginners (Routers, Switches, Firewalls)
Learn the difference between routers, switches, and firewalls in networking. This beginner-friendly guide explains how each device works using simple examples and Cisco concepts for CCNA study.
Configuring 802.1Q Trunks on Cisco Catalyst Switches
Master 802.1Q trunk configuration between Catalyst switches, including VLAN pruning, native VLAN setup, and comprehensive troubleshooting techniques.
Cisco Catalyst 9800 Wireless Controller Models Explained
Learn the differences between Cisco Catalyst 9800 wireless controller models, their features, and deployment options to choose the right WLC for your network.
Cisco OSPF Configuration Guide: Step-by-Step Tutorial
A complete single-area OSPF configuration on three Cisco routers, with every output block captured live from IOS XE 17.18: neighbors, routes, DR/BDR, ECMP, and the defaults worth changing.
OSPF Packet Types Explained: Hello, DBD, LSR, LSU, LSAck
OSPF uses five packet types (Hello, DBD, LSR, LSU, LSAck) to discover neighbors and sync the LSDB. Here is what each one does and where it fits in the adjacency process.
OSPF vs. Other Routing Protocols: When to Use OSPF
OSPF vs EIGRP, RIP, BGP, and IS-IS: how they differ on convergence, scalability, vendor support, and metric logic, and when OSPF is actually the right choice.
Introduction to OSPF: How Link-State Routing Works
OSPF gives every router in an area an identical map and lets each compute its own shortest paths. How the LSDB, adjacencies, DR/BDR, cost, and areas actually fit together, with live captures.
Native VLAN Configuration and Security on Cisco Switches
Master native VLAN configuration on Cisco Catalyst switches, understand VLAN hopping attacks, and implement security best practices to protect your switched network.
Cisco 9800-CL Wireless Controller Setup Made Easy
Skip the Day 0 wizard and configure the Cisco Catalyst 9800CL via CLI, including management interface, trustpoint, AP join, GUI access, and bootstrap commands.
VTP Configuration on Cisco Switches: Versions 1, 2, and 3
VTP automates VLAN propagation across switches—but a single switch with a high revision number can wipe all VLANs from your network. Learn how to configure VTPv3, manage revision numbers, and avoid the most dangerous VLAN mistake.
Configuring VLANs on Cisco Catalyst Switches
Learn how to create VLANs, assign access ports, and verify your VLAN configuration on Cisco Catalyst 9000 series switches using IOS XE 17.x.