OSPF route redistribution configuration example
Network requirements
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).
Figure 23: Network diagram
![](images/image23.png)
Configuration procedure
Configure IP addresses for interfaces. (Details not shown.)
Enable OSPF (see "Basic OSPF configuration example").
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
Verifying the configuration
# 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