H3C Technologies H3C SR8800 - Manual (Page 132)

116
Total Nets: 3
Intra Area: 2 Inter Area: 1 ASE: 0 NSSA: 0
NOTE:
After this configuration, route entries on the stub router are further reduced, containing only the default
external route.
Configuring an OSPF NSSA area
Network requirements
Figure 42 shows an AS is split into three areas, where all routers run OSPF. Router A and Router B act as
ABRs to forward routing information between areas.
Configure Area 1 as an NSSA area, and configure Router C as an ASBR to redistribute static routes into
the AS.
Figure 42 Network diagram
Configuration procedure
1. Configure IP addresses for interfaces. (Details not shown)
2. Configuring OSPF basic functions (see “ Configuring OSPF basic functions ”).
3. Configure Area 1 as an NSSA area:
# Configure Router A.
<RouterA> system-view
[RouterA] ospf
[RouterA-ospf-1] area 1
[RouterA-ospf-1-area-0.0.0.1] nssa
[RouterA-ospf-1-area-0.0.0.1] quit
# Configure Router C.
<RouterC> system-view
[RouterC] ospf
[RouterC-ospf-1] area 1
[RouterC-ospf-1-area-0.0.0.1] nssa
[RouterC-ospf-1-area-0.0.0.1] quit
[RouterC-ospf-1] quit
Area 0
Area 1
NSSA
Area 2
Router C
GE1/1/1
10.1.1.2/24
GE1/1/1
10.1.1.1/24
GE1/1/2
10.4.1.1/24
GE1/1/1
10.2.1.2/24
Router B
GE1/1/2
10.3.1.1/24
GE1/1/1
10.3.1.2/24
Router A
GE1/1/2
10.2.1.1/24
GE1/1/2
10.5.1.1/24 Router D
ASBR ASBR