3.3.3.3 1 0 0 0 0 1Dell#To view information on areas, use the show ip ospf process-id command in EXEC Privilege mode.Enabling Passive InterfacesA passive interface is one that does not send or receive routing information.Enabling passive interface suppresses routing updates on an interface. Although the passive interface does not send or receiverouting updates, the network on that interface is still included in OSPF updates sent via other interfaces.To suppress the interface’s participation on an OSPF interface, use the following command. This command stops the router fromsending updates on that interface.• Specify whether all or some of the interfaces are passive.CONFIG-ROUTEROSPF- id modepassive-interface {default | interface}The default is enabled passive interfaces on ALL interfaces in the OSPF process.Entering the physical interface type, slot, and number enables passive interface on only the identified interface.– For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/port[/subport] information.– For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the slot/port information.– For a port channel interface, enter the keywords port-channel then a number.– For a 40-Gigabit Ethernet interface, enter the keyword FortyGigabitEthernet then the slot/port information (for example,passive-interface fo 2/3 ).– For a VLAN interface, enter the keyword vlan then a number from 1 to 4094 (for example, passive-interface vlan 2222 ).The keyword default sets all interfaces on this OSPF process as passive.To remove the passive interface from select interfaces, use the no passive-interface interface command whilepassive interface default is configured.To enable both receiving and sending routing updates, use the no passive-interface interface command.Example of Viewing Passive InterfacesWhen you configure a passive interface, the show ip ospf process-id interface command adds the words passiveinterface to indicate that the hello packets are not transmitted on that interface (shown in bold).Dell#show ip ospf 34 intTenGigabitEthernet 1/1 is up, line protocol is downInternet Address 10.1.2.100/24, Area 1.1.1.1Process ID 34, Router ID 10.1.2.100, Network Type BROADCAST, Cost: 10Transmit Delay is 1 sec, State DOWN, Priority 1Designated Router (ID) 10.1.2.100, Interface address 0.0.0.0Backup Designated Router (ID) 0.0.0.0, Interface address 0.0.0.0Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5Hello due in 13:39:46Neighbor Count is 0, Adjacent neighbor count is 0TenGigabitEthernet 2/1 is up, line protocol is downInternet Address 10.1.3.100/24, Area 2.2.2.2Process ID 34, Router ID 10.1.2.100, Network Type BROADCAST, Cost: 10Transmit Delay is 1 sec, State DR, Priority 1Designated Router (ID) 10.1.2.100, Interface address 10.1.3.100Backup Designated Router (ID) 0.0.0.0, Interface address 0.0.0.0Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5No Hellos (Passive interface)Neighbor Count is 0, Adjacent neighbor count is 0Loopback 45 is up, line protocol is up590 Open Shortest Path First (OSPFv2 and OSPFv3)
