Neighbor ID Pri State Dead Time Address 10.0.1.1 1 FULL/DR 00:00:37 10.0.14.1
Port Gig0/1, where R4 was connected, was in VLAN 1. But the trunk port connecting this switch to the rest of the topology was allowing VLANs 10, 20, and 30. Not VLAN 1. cisco packet tracer exercises
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. Neighbor ID Pri State Dead Time Address 10
Layer 2. The switch. The invisible plumbing. where R4 was connected
R4#show ip ospf neighbor
A small victory: the command took. But still, no hello packets. No DR election. Just a cold, digital void.