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OSPF Configuration Tasks
Starting OSPF
Enabling OSPFv2
Copyright © 2010, Juniper Networks, Inc.
Configuring OSPF requires careful coordination among a variety of routing devices:
Routers internal to a single area
Routers that link multiple areas within a single routing domain; these routers are called
area border routers (ABRs)
Routers that link multiple routing domains; these routers are called autonomous system
boundary routers (AS boundary routers)
To minimally configure OSPF, you must:
Enable OSPF.
1.
Configure and aggregate network ranges.
2.
Create the router's OSPF network interfaces.
3.
Define the OSPF areas attached to the router.
4.
The following sections describe how to perform these tasks.
You enable OSPFv2 and OSPFv3 differently. When you enable OSPFv2 on your router,
you can create either a range of OSPFv2 interfaces or a single OSPFv2 interface. When
enabling OSPFv3, you create the OSPFv3 interface and assign the interface to an area.
You can create OSPFv2 interfaces in the following ways:
You can issue the network area command, which creates OSPF interfaces for all IP
interfaces with IP addresses within the specified range.
You can issue the address area command, which creates an OSPF interface in the
specified area that sits on top of the IP interface at the given IP address (or on the
unnumbered interface, if that is specified).
NOTE: Do not enable OSPF on any unidirectional interfaces (such as an
MPLS tunnel), because it can never form an adjacency.
You can delete OSPFv2 interfaces in the following ways:
You can issue the no network area command, which deletes all OSPF interfaces within
the specified range.
If the OSPF interface was created with the address area command, you can issue the
no address area command to delete the specified interface.
Chapter 5: Configuring OSPF
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