C
HAPTER
45
| IP Routing Commands
Open Shortest Path First (OSPFv2)
– 1043 –
router ospf This command enables Open Shortest Path First (OSPFv2) routing for all IP
interfaces on the router and enters router configuration mode. Use the no
form to disable OSPF for all processes or for a specified process.
SYNTAX
[no] router ospf [process-id]
process-id - Process ID must be entered when configuring multiple
routing instances. (Range: 1-65535; Default: 1)
COMMAND MODE
Global Configuration
DEFAULT SETTING
No routing process is defined.
COMMAND USAGE
â—† OSPF is used to specify how routers exchange routing table
information.
â—† This command is also used to enter router configuration mode.
â—† If the process ID is not defined, the default is instance 1.
ip ospf retransmit-
interval
Specifies the time between resending a link-state
advertisement
IC
ip ospf transmit-delay Estimates time to send a link-state update packet over
an interface
IC
passive-interface Suppresses OSPF routing traffic on the specified
interface
RC
Display Information
show ip ospf Displays general information about the routing
processes
PE
show ip ospf
border-routers
Displays routing table entries for Area Border Routers
(ABR) and Autonomous System Boundary Routers
(ASBR)
PE
show ip ospf database Shows information about different LSAs in the
database
PE
show ip ospf interface Displays interface information PE
show ip ospf neighbor Displays neighbor information PE
show ip ospf route Displays the OSPF routing table PE
show ip ospf virtual-links Displays parameters and the adjacency state of virtual
links
PE
show ip protocols ospf Displays OSPF process parameters PE
Table 142: Open Shortest Path First Commands (Continued)
Command Function Mode
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