3Com Switch 8800 Advanced Software V5 Configuration Guide

344 CHAPTER 30: OSPF CONFIGURATION
[SwitchA] ospf
[SwitchA-ospf-1] area 1
[SwitchA-ospf-1-area-0.0.0.1] nssa default-route-advertise no-summary
[SwitchA-ospf-1-area-0.0.0.0] quit
[SwitchA-ospf-1] quit
# Configure SwitchC.
[SwitchC] ospf
[SwitchC-ospf-1] area 1
[SwitchC-ospf-1-area-0.0.0.1] nssa
[SwitchC-ospf-1-area-0.0.0.1] quit
[SwitchC-ospf-1] quit
n
It is recommended to configure the nssa command with the keyword
default-route-advertise no-summary on SwitchA (an ABR) to reduce the
routing table size on NSSA routers. On other NSSA routers, using the nssa
command is ok.
# Display OSPF routing table information on SwitchC.
[SwitchC] display ospf routing
OSPF Process 1 with Router ID 192.168.1.2
Routing Tables
Routing for Network
Destination Cost type NextHop AdvRouter Area
0.0.0.0/0 2 Inter 192.168.1.1 192.168.1.1 0.0.0.1
172.16.1.0/24 1 Stub 172.16.1.1 192.168.1.2 0.0.0.1
192.168.1.0/24 1 Transit 192.168.1.2 192.168.1.2 0.0.0.1
Total Nets: 3
Intra Area: 2 Inter Area: 1 ASE: 0 NSSA: 0
5 Configure SwitchC to redistribute static routes.
[SwitchC] ip route-static 100.0.0.0 8 null 0
[SwitchC] ospf
[SwitchC-ospf-1] import-route static
[SwitchC-ospf-1] quit
# Display OSPF routing table information on SwitchD.
[SwitchD-ospf-1] display ospf routing
OSPF Process 1 with Router ID 192.168.2.2
Routing Tables
Routing for Network
Destination Cost type NextHop AdvRouter Area
172.16.1.0/24 4 Inter 192.168.2.1 192.168.2.1 0.0.0.2
172.17.1.0/24 1 Stub 172.17.1.1 192.168.2.2 0.0.0.2
192.168.0.0/24 2 Inter 192.168.2.1 192.168.2.1 0.0.0.2
192.168.1.0/24 3 Inter 192.168.2.1 192.168.2.1 0.0.0.2
192.168.2.0/24 1 Transit 192.168.2.2 192.168.2.2 0.0.0.2
Routing for ASEs
Destination Cost type Tag NextHop AdvRouter
100.0.0.0/8 1 Type2 1 192.168.2.1 192.168.1.1
Total Nets: 6