Port Security.
Take the time to run this lab. Break it on purpose. Watch the show port-security , show dhcp snooping binding , and show interfaces status err-disabled outputs.
Happy (secure) switching.
Instead of using VLAN 1 (the default native VLAN), change it to, for example, VLAN 999.
Let’s break down what this lab teaches and why it matters in the real world. Imagine you are responsible for a corporate network. Users are in VLAN 10 (Employees) and VLAN 20 (Guests). The lab presents a simple topology: one multilayer switch (distribution), one layer 2 switch (access), and a few PCs.
