109
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 route summarization configuration example
Network requirements
As shown in Figure 26:
Configure OSPF on Switch A and Switch B in AS 200.
Configure OSPF on Switch C, Switch D, and Switch E in AS 100.
Configure an EBGP connection between Switch B and Switch C. Configure Switch B and
Switch C to redistribute OSPF routes and direct routes into BGP and BGP routes into OSPF.
Configure Switch B to advertise only summary route 10.0.0.0/8 to Switch A.
Figure 26 Network diagram
Configuration procedure
1. Configure IP addresses for interfaces. (Details not shown.)
2. Enable OSPF:
# Configure Switch A.
<SwitchA> system-view
[SwitchA] router id 11.2.1.2
[SwitchA] ospf
[SwitchA-ospf-1] area 0
Switch A
Switch B
Switch D
Switch E
Switch C
Vlan-int400
10.1.1.1/24
Vlan-int400
10.1.1.2/24
Vlan-int300
10.2.1.2/24
Vlan-int300
10.2.1.1/24
Vlan-int200
11.1.1.2/24
Vlan-int200
11.1.1.1/24
EBGP
AS 200
AS 100
Vlan-int100
11.2.1.1/24
Vlan-int100
11.2.1.2/24
Vlan-int500
10.3.1.1/24
Vlan-int600
10.4.1.1/24
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