99
# Display the OSPF routing information on Router D.
<RouterD> display ospf routing
OSPF Process 1 with Router ID 10.5.1.1
Routing Tables
Routing for Network
Destination Cost Type NextHop AdvRouter Area
10.2.1.0/24 22 Inter 10.3.1.1 10.3.1.1 0.0.0.2
10.3.1.0/24 10 Transit 10.3.1.2 10.3.1.1 0.0.0.2
10.4.1.0/24 25 Inter 10.3.1.1 10.3.1.1 0.0.0.2
10.5.1.0/24 10 Stub 10.5.1.1 10.5.1.1 0.0.0.2
10.1.1.0/24 12 Inter 10.3.1.1 10.3.1.1 0.0.0.2
Routing for ASEs
Destination Cost Type Tag NextHop AdvRouter
3.1.2.0/24 1 Type2 1 10.3.1.1 10.4.1.1
Total Nets: 6
Intra Area: 2 Inter Area: 3 ASE: 1 NSSA: 0
OSPF summary route advertisement configuration example
Network requirements
• Configure OSPF on Router A and Router B in AS 200.
• Configure OSPF on Router C, Router D, and Router E in AS 100.
• Configure an EBGP connection between Router B and Router C. Configure Router B and Router C
to redistribute OSPF routes and direct routes into BGP and BGP routes into OSPF.
• Configure Router B to advertise only summary route 10.0.0.0/8 to Router A.
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