All Routing and switching related topics will come under this category.
Computer networks are the foundation of the modern business world. They’re the connections that carry network traffic and link together the hardware and software of every digital device. Without a well-designed and functioning network, businesses and individuals wouldn’t be able…
Understand VLAN tagged vs untagged in plain language. We clarify access vs trunk ports, correct 802.1Q tag fields (PCP/DEI/VID), native vs default VLAN, and modern configuration best practices.
A clear, accurate guide to VLANs and Private VLANs (PVLANs)—how they work, when to use them, and the essential security and configuration details you need.
IP Subnetting divides IP addresses and networks into smaller groups, determining the network and host bits. Learn more with the IP subnetting cheat sheet and CIDR cheat sheet.
Deciding between HSRP vs. VRRP vs. GLBP is a common challenge for network engineers. The right choice often depends on your network equipment, design goals, and specific redundancy requirements. All three are First Hop Redundancy Protocols (FHRPs) that operate at…
A comprehensive guide to understanding and configuring Virtual Router Redundancy Protocol (VRRP) on modern Cisco devices. Learn about VRRPv3, key concepts like priority and preemption, object tracking, and best practices for IPv4 and IPv6 environments.
HSRP is an FHRP (First Hop Redundancy Protocol) developed by Cisco to provide redundancy and high network availability almost anywhere in the network where we have two layer3 devices. HSRP config gives a group of routers a virtual IP address…
A deep dive into Router on the Stick configuration with practical, step-by-step examples for both Enterprise and Service Provider networks using modern Cisco commands.
Struggling to find the login details for your Cisco router? This guide walks you through two simple, effective methods to find default credentials, navigate Cisco's website, and access any router model, from older classics to modern devices.
GLBP stands for Gateway Load Balancing Protocol and it is a Cisco proprietary First Hop Redundancy Protocol that attempts to overcome the limitations of existing redundant router protocols by adding basic load balancing functionality. In addition, it allows one virtual router…