3.3.12 Packet Tracer - Vlan Configuration.pka Online

Professor Lasky walked by, glanced at the screen, and said only: “Three VLANs today. Three hundred in the real world. The logic doesn’t change.”

But when Alex tried to ping from PC1 (Accounting) to PC5 (Engineering)…

He walked off. The switches hummed.

The problem slapped Alex in the face: .

The basement lab of Meridian Community College. Racks of aging but reliable Cisco switches hum in the corner. On a monitor, the Packet Tracer interface glows green.

“This is too friendly,” Alex muttered. “I don’t want Accounting to talk to Engineering. They have nothing in common except coffee.”

Alex learned the hard lesson: deleting a VLAN from one switch doesn’t delete it from others. But it does break connectivity for any access port still assigned to that missing VLAN on that switch. 3.3.12 packet tracer - vlan configuration.pka

On S1, G0/1:

But Professor Lasky had hidden a trap. The instructions, step 7: “Verify that PC3 cannot ping PC5.” Alex did. It couldn’t. Good.

Request timed out. Request timed out.

Alex did this for all three switches, matching the color-coded diagram in Packet Tracer. Red for Accounting. Blue for Engineering. Green for Staff.

switchport trunk allowed vlan add 30 Ping. Success. All three switches now carried all three VLANs. One last test. PC4 (Accounting, S2) → PC6 (Accounting, S3). Works. PC2 (Engineering, S1) → PC5 (Engineering, S2). Works.

A quick check. PC3 was also in Accounting. It should work. Professor Lasky walked by, glanced at the screen,