Switching and Routing: Core Configs and Redundancy
Together, these technologies form the foundation of a scalable, redundant, and correctly segmented enterprise network core.
This course covers the core building blocks of enterprise switching and routing: VLANs, 802.1Q trunking, inter-VLAN routing with router-on-a-stick, Layer 2 redundancy through Spanning Tree Protocol (STP) and Link Aggregation Control Protocol (LACP), and dynamic routing with OSPF. Each module combines conceptual explanations with full, hands-on Cisco IOS command-line walkthroughs and verification steps so that the underlying mechanics of each technology are clearly demonstrated end to end.
The goal of this module is to build a small but complete switched/routed topology consisting of one router (Router 1), two switches (Switch 1 and Switch 2), and two end devices (PC1 and PC2). By the end of the module, PC1 and PC2 will live on two different VLANs, and traffic between them will be routed by Router 1 acting as a router-on-a-stick.
Work begins on Switch 2, where VLAN 10 (Sales) and VLAN 20 (Marketing) are created and then assigned to the access ports connecting to PC1 and PC2.
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What's inside
6 sections- 1 Table of Contents
- 2 Module 1: VLANs, Trunking, and Inter-VLAN Routing
- 3 Module 2: Layer 2 Redundancy, Spanning Tree Protocol, and Link Aggregation
- 4 Module 3: Dynamic Routing with OSPF
- 5 Summary
- 6 CLI Quick-Reference Cheat Sheet
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Prerequisites: CCNA-level networking skills, including familiarity with routing protocols (OSPF, EIGRP, BGP basics), switching, VLANs, and subnetting.
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