11.2.2 Configuration flow

(1) Setting the Basic OSPF Functions

1. Set up the IP interfaces in advance.

2. Enable OSPF.

   Assign a unique router ID to each router.

   Router IDs can be selected automatically.

3. Configure advertisement of external AS routes.

   This step is required to advertise the routes of other protocols in OSPF.

   It is also required if you intend to redistribute routes between domains using multi-backbone functionality.

4. Configure route selection.

   If you need to assign a weighting to routes that travel over specific interfaces, use the ip ospf cost command to assign a cost.