Command Line Reference Guide

1044 | Open Shortest Path First (OSPFv2 and OSPFv3)
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Example
Figure 38-3. Command Example: router-id
Usage
Information
You can configure an arbitrary value in the IP address format for each router. However, each router ID
must be unique. If this command is used on an OSPF router process, which is already active (that is,
has neighbors), a prompt reminding you that changing router-id will bring down the existing OSPF
adjacency. The new router ID is effective at the next reload
router ospf
c e s
Enter the ROUTER OSPF mode to configure an OSPF instance.
Syntax
router ospf process-id [vrf {vrf name}]
To clear an OSPF instance, enter no router ospf process-id.
Parameters
Defaults
Not configured.
Command Modes
CONFIGURATION
Command
History
Example
Figure 38-4. Command Example: router ospf
Usage
Information
You must have an IP address assigned to an interface to enter the ROUTER OSPF mode and configure
OSPF.
Once the OSPF process and the VRF are tied together, the OSPF Process ID cannot be used again in
the system.
FTOS(conf)#router ospf 100
FTOS(conf-router_ospf)#router-id 1.1.1.1
Changing router-id will bring down existing OSPF adjacency [y/n]:
FTOS(conf-router_ospf)#show config
!
router ospf 100
router-id 1.1.1.1
FTOS(conf-router_ospf)#no router-id
Changing router-id will bring down existing OSPF adjacency [y/n]:
FTOS#
process-id
Enter a number for the OSPF instance.
Range: 1 to 65535.
vrf name
(Optional) E-Series Only: Enter the VRF process identifier to tie the OSPF instance to the
VRF. All network commands under this OSPF instance are subsequently tied to the VRF
instance.
Version 7.9.1.0 Introduced VRF
Version 7.8.1.0 Introduced support of Multi-Process OSPF.
Version 7.6.1.0 Introduced on S-Series
Version 7.5.1.0 Introduced on C-Series
pre-Version 6.1.1.1 Introduced on E-Series
FTOS(conf)#router ospf 2
FTOS(conf-router_ospf)#