H3C Technologies H3C S7500E Series Switches - Manual (Page 127)

4-58
[SwitchA] display ip routing-table
Routing Tables: Public
Destinations : 5 Routes : 5
Destination/Mask Proto Pre Cost NextHop Interface
10.0.0.0/8 O_ASE 150 2 11.2.1.1 Vlan100
11.2.1.0/24 Direct 0 0 11.2.1.2 Vlan100
11.2.1.2/32 Direct 0 0 127.0.0.1 InLoop0
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
Configuring an OSPF Stub Area
Network requirements
The following figure shows an AS is split into three areas, where all switches run OSPF. Switch A and
Switch B act as ABRs to forward routing information between areas. Switch D acts as the ASBR to
redistribute routes (static routes).
It is required to configure Area 1 as a Stub area, reducing LSAs to this area without affecting route
reachability.
Figure 4-24 Network diagram for OSPF Stub area configuration
Area 0
Area 1
Stub Area 2
Switch C
Vlan-int100
10.1.1.2/24
Vlan-int100
10.1.1.1/24
Vlan-int300
10.4.1.1/24
Vlan-int200
10.2.1.2/24
Switch B
Vlan-int200
10.3.1.1/24
Vlan-int200
10.3.1.2/24
Switch A
Vlan-int200
10.2.1.1/24
Vlan-int300
10.5.1.1/24 Switch D
ASBR
Configuration procedure
1) Configure IP addresses for interfaces (omitted).
2) Configure OSPF basic functions (see Configuring OSPF Basic Functions ).
3) Configure Switch D to redistribute static routes.
[SwitchD] ip route-static 3.1.2.1 24 10.5.1.2
[SwitchD] ospf
[SwitchD-ospf-1] import-route static
[SwitchD-ospf-1] quit
# Display ABR/ASBR information on Switch C.
[SwitchC] display ospf abr-asbr
OSPF Process 1 with Router ID 10.4.1.1
Routing Table to ABR and ASBR
Type Destination Area Cost Nexthop RtType