3.3.e Implement and troubleshoot passive interface
RIP, OSPF, and EIGRP all support what’s known as passive-interfaces.
Enabling an interface as passive will mean we will not send our hellos out on the interface, but we will advertise the interface’s network into the routing protocol.
en conf t router ospf 1 passive-interface <default | interface>
How do you utilize the passive-interface default? Give an example where all interfaces except for g0/1 should be passive.
router ospf 1 passive-interface default no passive-interface g0/1 end
How can you verify which interfaces are passive?
show ip protocols