An emergency-management office cannot form EIGRP neighbors on a transit link after a change window. Investigation shows passive-interface was applied to that transit interface. What is the direct effect causing the adjacency failure?
Select an answer to reveal the explanation.
Short Explanation
Passive on a transit link is like putting the radio on receive-only—you announce the subnet from elsewhere, but you never say hello on that wire. No hellos means no neighbor. Move passive to user-facing edges, not the links that must peer.
Full Explanation
EIGRP passive-interface stops hello transmission and adjacency formation on the specified interface; the network can still be advertised out other non-passive interfaces. It does not encrypt packets, invent OSPF network types, or permanently break feasibility math. Misapplying passive on a required transit peer link is a common adjacency outage cause.