Cisco-Ios
lab-guides2026-08-20
VLANs + Inter-VLAN Routing on IOS
Trunk, SVI, and the native VLAN gotcha that breaks pings.
lab-guides2026-08-10
OSPF Single-Area Lab
Three-router OSPF, loopbacks, and passive-interface hygiene.
lab-guides2026-07-28
ACL Basics: Standard vs Extended
Block OT vlan from LAB, allow MGMT everywhere. Placement matters.