Dell S4048T-ON, Configuration Manual

Page: 634 / 1146

CONFIG-ROUTER-OSPF-id mode
area area-id stub [no-summary]
Use the keywords
no-summary
to prevent transmission into the area of summary ASBR LSAs.
Area ID is the number or IP address assigned when creating the area.
Example of the
show ip ospf database database-summary
Command
To view which LSAs are transmitted, use the
show ip ospf database process-id database-summary
command in EXEC
Privilege mode.
Dell#show ip ospf 34 database database-summary
OSPF Router with ID (10.1.2.100) (Process ID 34)
Area ID Router Network S-Net S-ASBR Type-7 Subtotal
2.2.2.2 1 0 0 0 0 1
3.3.3.3 1 0 0 0 0 1
Dell#
To view information on areas, use the
show ip ospf process-id
command in EXEC Privilege mode.
Enabling Passive Interfaces
A 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 receive routing
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 from sending
updates on that interface.
• Specify whether all or some of the interfaces are passive.
CONFIG-ROUTEROSPF- id mode
passive-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 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 while
passive
interface default
is configured.
To enable both receiving and sending routing updates, use the
no passive-interface interface
command.
Example of Viewing Passive Interfaces
When you configure a passive interface, the
show ip ospf process-id interface
command adds the words
passive
interface
to indicate that the hello packets are not transmitted on that interface (shown in bold).
Dell#show ip ospf 34 int
TenGigabitEthernet 1/1 is up, line protocol is down
Internet Address 10.1.2.100/24, Area 1.1.1.1
Process ID 34, Router ID 10.1.2.100, Network Type BROADCAST, Cost: 10
634 Open Shortest Path First (OSPFv2 and OSPFv3)