“Perfect isolation,” Alex said, closing Packet Tracer. “Almost as good as my weekend plans.”
He walked off. The switches hummed.
“Walls built,” Alex said, leaning back. But Professor Lasky’s note glowed again: “VLANs are islands. How do islands talk?” Alex realized: S1 knows VLAN 10 exists on its own ports. S2 knows VLAN 10 exists on its own ports. But between switches? Silence. 3.3.12 packet tracer - vlan configuration.pka
enable configure terminal vlan 10 name Accounting vlan 20 name Engineering vlan 30 name Staff end It felt like naming three new pets. But switches don’t wag tails. They just add lines to a file called vlan.dat . “Perfect isolation,” Alex said, closing Packet Tracer
interface gigabitEthernet 0/1 switchport mode trunk switchport trunk allowed vlan 10,20,30 Same on S2’s G0/1 and S3’s G0/2. “Walls built,” Alex said, leaning back
Professor Lasky’s note floated at the top of the instructions: “VLANs don’t just happen. You build walls where there are none.”
The problem slapped Alex in the face: .