He saved the Packet Tracer file— Leone_Final_OSPF_Fixed.pkt —and uploaded it with two minutes to spare. As he shut his laptop, he looked at the topology one last time. The little green triangles next to each router link now glowed solid, and the packets flowed between Chicago, Dallas, Atlanta, and Seattle like digital blood through a revived body.
He held his breath. He clicked back to R4. cisco packet tracer exercises
Leo double-clicked the switch connecting R4 to the rest of the world, a humble 2960 model. He ran a quick show vlan brief . His heart stopped. He saved the Packet Tracer file— Leone_Final_OSPF_Fixed
It was a silent, perfect, evil mistake. The router was shouting "Hello!" into a VLAN that vanished the moment it hit the trunk. The digital voice was being erased before it could travel a single hop. He held his breath