OSPF Lab Topology
The diagram below will be used as the lab topology, which is the reference topology I use for all JNCIE-SP labs.
For this particular lab there will be two non-backbone areas (area 1 and 2) both dual-homed into four backbone routers.
This topology will provide enough connectivity to prove all of the functions that require testing and validating for JNCIE-SP.
Backbone Router Configuration
The example below shows how to configure OSPF interfaces into the backbone area. This should be the first steps that are taken when building an OSPFv2 multi-area domain.