Your OSPF network has a number of physical and departmental boundaries, and, for administrative purposes and for scalability, you want to divide the network into a number of areas.
Configure a second OSPF area on the router:
[edit protocols] aviva@RouterG#
set ospf area 0.0.0.1 interface
To create additional areas in the
OSPF network, configure the second area on the router's interface (or interfaces) that connects to the second area. In this recipe, we configure the second area, Area
0.0.0.1, on our router. This router acts as the ABR between the backbone area and Area
0.0.0.1. See Figure 12-2.
Figure 12-2. OSPF two-area topology
Check that the interface is configured:
show ospf interfaceInterface State Area DR ID BDR ID Nbrs fe-0/0/1.0 DR 0.0.0.0 192.168.19.1 192.168.18.1 1 fe-1/0/1.0 BDR 0.0.0.0 192.168.17.1 192.168.19.1 1
fe-1/0/0.0 BDR 0.0.0.1 192.168.42.1 192.168.19.1 1
You see that interface
fe-1/0/0 is up and is in Area
Again, check that the neighbor is active:
show ospf neighbor detailAddress Interface State ID Pri Dead 10.0.1.1 fe-0/0/1.0 Full 192.168.18.1 128 33 area 0.0.0.0, opt 0x42, DR 10.0.1.2, BDR 10.0.1.1 Up 01:11:30, adjacent 01:11:30 10.0.0.2 fe-1/0/1.0 Full 192.168.17.1 128 39 area 0.0.0.0, opt 0x42, DR 10.0.0.1, BDR 10.0.0.2 Up 01:11:30, adjacent ...