OSPFv3 NSSA area configuration example
Network requirements
As shown in Figure 104:
Configure OSPFv3 on all switches and split the AS into three areas.
Configure Switch B and Switch C as ABRs to forward routing information between areas.
Configure Area 1 as an NSSA area and configure Switch A as an ASBR to redistribute static routes into the AS.
Figure 104: Network diagram
Configuration procedure
Configure IPv6 addresses for interfaces. (Details not shown.)
Configure basic OSPFv3 (see "OSPFv3 stub area configuration example").
Configure Area 1 as an NSSA area:
# Configure Switch A.
[SwitchA] ospfv3 [SwitchA-ospfv3-1] area 1 [SwitchA-ospfv3-1-area-0.0.0.1] nssa [SwitchA-ospfv3-1-area-0.0.0.1] quit [SwitchA-ospfv3-1] quit
# Configure Switch B.
[SwitchB] ospfv3 [SwitchB-ospfv3-1] area 1 [SwitchB-ospfv3-1-area-0.0.0.1] nssa [SwitchB-ospfv3-1-area-0.0.0.1] quit [SwitchB-ospfv3-1] quit
# Display OSPFv3 routing information on Switch A.
[SwitchA] display ospfv3 1 routing OSPFv3 Process 1 with Router ID 1.1.1.1 ------------------------------------------------------------------------- I - Intra area route, E1 - Type 1 external route, N1 - Type 1 NSSA route IA - Inter area route, E2 - Type 2 external route, N2 - Type 2 NSSA route * - Selected route *Destination: 2001::/64 Type : IA Cost : 2 NextHop : FE80::20C:29FF:FE74:59C6 Interface: Vlan200 AdvRouter : 2.2.2.2 Area : 0.0.0.1 Preference : 10 *Destination: 2001:1::/64 Type : I Cost : 1 Nexthop : :: Interface: Vlan200 AdvRouter : 1.1.1.1 Area : 0.0.0.1 Preference : 10 *Destination: 2001:2::/64 Type : IA Cost : 3 NextHop : FE80::20C:29FF:FE74:59C6 Interface: Vlan200 AdvRouter : 2.2.2.2 Area : 0.0.0.1 Preference : 10 Total: 3 Intra area: 1 Inter area: 2 ASE: 0 NSSA: 0
Configure route redistribution:
# Configure an IPv6 static route, and configure OSPFv3 to redistribute the static route on Switch A.
[SwitchA] ipv6 route-static 1234:: 64 null 0 [SwitchA] ospfv3 1 [SwitchA-ospfv3-1] import-route static [SwitchA-ospfv3-1] quit
# Display OSPFv3 routing information on Switch D.
[SwitchD] display ospfv3 1 routing OSPFv3 Process 1 with Router ID 4.4.4.4 ------------------------------------------------------------------------- I - Intra area route, E1 - Type 1 external route, N1 - Type 1 NSSA route IA - Inter area route, E2 - Type 2 external route, N2 - Type 2 NSSA route * - Selected route *Destination: 2001::/64 Type : IA Cost : 2 NextHop : FE80::20C:29FF:FEB9:F2EF Interface: Vlan400 AdvRouter : 3.3.3.3 Area : 0.0.0.2 Preference : 10 *Destination: 2001:1::/64 Type : IA Cost : 3 NextHop : FE80::20C:29FF:FEB9:F2EF Interface: Vlan400 AdvRouter : 3.3.3.3 Area : 0.0.0.2 Preference : 10 *Destination: 2001:2::/64 Type : I Cost : 1 NextHop : :: Interface: Vlan400 AdvRouter : 4.4.4.4 Area : 0.0.0.2 Preference : 10 *Destination: 1234::/64 Type : E2 Cost : 1 NextHop : FE80::20C:29FF:FEB9:F2EF Interface: Vlan400 AdvRouter : 2.2.2.2 Area : 0.0.0.2 Preference : 10 Total: 4 Intra area: 1 Inter area: 2 ASE: 1 NSSA: 0
The output shows an AS external route imported from the NSSA area exists on Switch D.