What does the passive interface command do in EIGRP?
- The passive-interface command in EIGRP suppresses the exchange of hello packets between two routers, which results in the loss of their neighbor relationship. Also, it does suppress the incoming routing packets.
- The router cannot receive routing updates on that interface.
- The router cannot form neighbor adjacencies on that interface.
- The router cannot send routing updates on that interface.
Explanation: In EIGRP, the passive-interface command stops the interface from sending and receiving Hello packets, which are required to discover neighbors and establish adjacencies. Because no adjacency can be formed, the router cannot exchange routing information with other EIGRP routers on that segment. Furthermore, the command specifically suppresses incoming routing packets, preventing the router from learning any EIGRP updates through that interface.
Related exam: Modules 8 – 13: Checkpoint Exam: Network Routing Answers (CCNP ENCOR v9)
