H3C Technologies H3C SR8800 - Manual (Page 142)

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Configuring route filtering
Network requirements
As shown in Figure 46 :
• All the routers in the network run OSPF. The AS is divided into three areas.
• Router A works as the ABR between Area 0 and Area 1. Router B works as the ABR between Area
0 and Area 2.
• Configure Router C as an ASBR to redistribute external routes (static routes), and configure a filter
policy on Router C to filter out route 3.1.3.0/24.
• Configure a routing policy on Router A to filter route 10.5.1.0/24.
Figure 46 Network diagram
Configuration procedure
1. Configure IP addresses for interfaces. (Details not shown)
2. Configure OSPF basic functions (see “ Configuring OSPF basic functions ”).
3. Configure OSPF to redistribute routes:
# On Router C, configure a static route destined for network 3.1.1.0/24.
system-view
[RouterC] ip route-static 3.1.1.0 24 10.4.1.2
# On Router C, configure a static route destined for network 3.1.2.0/24.
[RouterC] ip route-static 3.1.2.0 24 10.4.1.2
# On Router C, configure a static route destined for network 3.1.3.0/24.
[RouterC] ip route-static 3.1.3.0 24 10.4.1.2
# Configure OSPF to redistribute static routes on Router C.
[RouterC] ospf 1
[RouterC-ospf-1] import-route static
[RouterC-ospf-1] quit
# Display the OSPF routing table of Router A.
display ip routing-table
Routing Tables: Public
Destinations : 12 Routes : 12
Destination/Mask Proto Pre Cost NextHop Interface