STP and RSTP on Cisco IOS-XE explained in depth — root bridge placement, PortFast, BPDU Guard, Root Guard, Loop Guard, and a step-by-step troubleshooting workflow with real CLI command output.
Most enterprise networks still run dual-stack at best in 2026. This guide covers full IPv6 deployment on Cisco IOS-XE: addressing, OSPFv3, DHCPv6, ACLs, BGP, and the verification commands that actually tell you what’s broken — with real CLI output and production gotchas.
DMVPN Phase 2 enables direct spoke-to-spoke tunnels on demand, bypassing the hub after the initial NHRP resolution. This complete IOS-XE guide covers mGRE tunnel setup, NHRP configuration, EIGRP next-hop-self pitfalls, IPsec with IKEv2, verification commands, and the most common deployment gotchas.
A practical guide to diagnosing and fixing the most common OSPF adjacency failures on Cisco IOS-XE — MTU mismatches, timer conflicts, authentication errors, duplicate Router IDs, and flapping neighbors — with real show command output and CLI fixes.
Cisco’s Embedded Event Manager (EEM) is one of the most underutilized features in IOS-XE. This guide covers six practical EEM applets — from BGP peer monitoring and interface flap detection to nightly config backups and CPU spike capture — with real CLI syntax and Cat9K-specific tips.
BGP is the glue that holds the internet together — learn how it works, how to configure it on Cisco, and the security challenges it faces.
Tailscale makes VPN dead simple — install it, and your devices just connect. Here’s how to set it up with subnet routing, exit nodes, and SSH.
A deep dive into Cisco’s three operating systems — IOS, IOS-XE, and IOS-XR — their architectures, platforms, CLI differences, and when you’ll encounter each.
A hands-on guide to VLANs — what they are, why segmentation matters, and how to configure them on a managed switch with Cisco CLI examples.
A step-by-step guide to installing Pi-hole — on a Raspberry Pi or via Docker — and blocking ads across every device on your network.
A detailed comparison of Cisco Catalyst and Meraki for homelab use — covering cost, management, features, and which one actually makes sense for your setup.
