Deployment Guide

no shutdown
!
interface TenGigabitEthernet 3/1/1
ip address 10.1.13.3/24
no shutdown
!
interface TenGigabitEthernet 3/2/1
ip address 10.2.13.3/24
no shutdown
OSPF Area 0 — Te 2/1/1 and 2/2/1
router ospf 22222
network 192.168.100.0/24 area 0
network 10.2.21.0/24 area 0
network 10.2.22.0/24 area 0
!
interface Loopback 20
ip address 192.168.100.20/24
no shutdown
!
interface TenGigabitEthernet 2/1/1
ip address 10.2.21.2/24
no shutdown
!
interface TenGigabitEthernet 2/2/1
ip address 10.2.22.2/24
no shutdown
OSPFv3 NSSA
NSSA (Not-So-Stubby-Area) is a stub area that does not support Type-5 LSAs, but supports Type-7 LSAs to forward external
links. Initially ASBR (Autonomous System Border Router) forwards the external links through Type-7 LSAs to the Area Border
Router (ABR) of NSSA, which in turn converts them into Type-5 LSAs and forwards them to the rest of the OSPF domain.
NOTE: To support NSSA area, all the OSPF routers in that area should be configured with NSSA.
NSSA Options
NSSA can be configured with the following options:
1. Default-information-originate – To inject a default route using Type-7 LSAs — NSSA routers need to have access to the rest
of the OSPF routers in the autonomous system. To facilitate this, the default route is injected into the NSSA area through a
Type-7 LSA. This can be generated either by NSSA ASBR or NSSA ABR.
2. No-redistribute – To restrict Type-7 LSAs — When NSSA ASBR is also an ABR, redistributed external routes need not be
translated from Type-7 to Type-5 LSAs. ABR will directly inject external routes through Type-5 LSAs into the OSPF domain.
It does not send Type-7 LSAs into the NSSA area.
3. No-summary – To act as totally stubby area — NSSA area can be converted intoa totally stubby area to reduce the number
of Type-3 LSAs. Once it is configured, NSSA ABR will inject Type-3 LSAs into the NSSA area for default routes. The
remaining Type-3 LSAs are not allowed inside this area.
Configuration Task List for OSPFv3 (OSPF for IPv6)
This section describes the configuration tasks for Open Shortest Path First version 3 (OSPF for IPv6) on the switch.
The configuration options of OSPFv3 are the same as those options for OSPFv2, but you may configure OSPFv3 with
differently labeled commands. Specify process IDs and areas and include interfaces and addresses in the process. Define areas
as stub or totally stubby.
620
Open Shortest Path First (OSPFv2 and OSPFv3)