OSPF route redistribution configuration example

• Enable OSPF on all the switches.

• Split the AS into three areas.

• Configure Switch A and Switch B as ABRs.

• Configure Switch C as an ASBR to redistribute external routes (static routes).

1. Configure IP addresses for interfaces. (Details not shown.)

2. Enable OSPF (see "Basic OSPF configuration example").

3. Configure OSPF to redistribute routes:

   # On Switch C, configure a static route destined for network 3.1.2.0/24.

   <SwitchC> system-view
   [SwitchC] ip route-static 3.1.2.1 24 10.4.1.2
   

   # On Switch C, configure OSPF to redistribute static routes.

   [SwitchC] ospf 1
   [SwitchC-ospf-1] import-route static
   

# Display the ABR/ASBR information of Switch D.

<SwitchD> display ospf abr-asbr

          OSPF Process 1 with Router ID 10.5.1.1
                  Routing Table to ABR and ASBR

 Type        Destination     Area            Cost  Nexthop         RtType
 Intra       10.3.1.1        0.0.0.2         10    10.3.1.1        ABR
 Inter       10.4.1.1        0.0.0.2         22    10.3.1.1        ASBR

# Display the OSPF routing table on Switch D.

<SwitchD> 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