OSPF Configuration Tasks

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:

1. Enable OSPF.
2. Configure and aggregate network ranges.
3. Create the router’s OSPF network interfaces.
4. Define the OSPF areas attached to the router.

The following sections describe how to perform these tasks.

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