96 
[RouterB] ospf 
[RouterB-ospf-1] area 0 
[RouterB-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255 
[RouterB-ospf-1-area-0.0.0.0] quit 
[RouterB-ospf-1] area 2 
[RouterB-ospf-1-area-0.0.0.2] network 10.3.1.0 0.0.0.255 
[RouterB-ospf-1-area-0.0.0.2] quit 
[RouterB-ospf-1] quit 
# Configure Router C. 
<RouterC> system-view 
[RouterC] router id 10.4.1.1 
[RouterC] ospf 
[RouterC-ospf-1] area 1 
[RouterC-ospf-1-area-0.0.0.1] network 10.2.1.0 0.0.0.255 
[RouterC-ospf-1-area-0.0.0.1] network 10.4.1.0 0.0.0.255 
[RouterC-ospf-1-area-0.0.0.1] quit 
[RouterC-ospf-1] quit 
# Configure Router D. 
<RouterD> system-view 
[RouterD] router id 10.5.1.1 
[RouterD] ospf 
[RouterD-ospf-1] area 2 
[RouterD-ospf-1-area-0.0.0.2] network 10.3.1.0 0.0.0.255 
[RouterD-ospf-1-area-0.0.0.2] network 10.5.1.0 0.0.0.255 
[RouterD-ospf-1-area-0.0.0.2] quit 
[RouterD-ospf-1] quit 
Verifying the configuration 
# Display the OSPF neighbors of Router A. 
[RouterA] display ospf peer verbose 
          OSPF Process 1 with Router ID 10.2.1.1 
                  Neighbors 
 
 Area 0.0.0.0 interface 10.1.1.1(Ethernet1/1)'s neighbors 
 Router ID: 10.3.1.1         Address: 10.1.1.2         GR State: Normal 
   State: Full  Mode: Nbr is Master  Priority: 1 
   DR: 10.1.1.1  BDR: 10.1.1.2  MTU: 0 
   Options is 0x02 (-|-|-|-|-|-|E|-) 
   Dead timer due in 37  sec 
   Neighbor is up for 06:03:59 
   Authentication Sequence: [ 0 ] 
   Neighbor state change count: 5 
 
                  Neighbors 
 
 Area 0.0.0.1 interface 10.2.1.1(Ethernet1/2)'s neighbors 
 Router ID: 10.4.1.1         Address: 10.2.1.2         GR State: Normal 
   State: Full  Mode: Nbr is Master  Priority: 1