172| OSPFv2 AOS-W 6.5.3.x| User Guide
The following figure displays how the switch is configured for Instant AP VPN for different OSPF cases.
Figure 36
Topology
n Area-10 is NSSA (Not-So-Stubby Area)
n Area-11 is Normal area.
n RAPNG AP-1 is configured to have a UP switch as its primary switch and a DOWN as secondary switch.
n RAPNG AP-2 is configured to have a DOWN as its primary switch and a UP as secondary switch.
n RAPNG AP-1 is configured to have a 201.201.203.0/24 L3-distributed network.
n RAPNG AP-2 is configured to have a 202.202.202.0/24 L3-distributed network.
Observation
n UP Switch will send Type-5 LSA (External LSA) of VPN route 201.201.203.0/24 to it’s upstream router, Cisco-
3750.
n DOWN Switch will send Type-7 LSA (NSSA) of VPN route 202.202.202.0/24 to it’s upstream router, Cisco-
2950.
n UP Switch will send a Type-4 asbr-summary LSA.
Configuring UP Switch
interface vlan 21
ip address 21.21.21.2 255.255.255.0
ip ospf area 0.0.0.11
!
router ospf
router ospf area 0.0.0.11
router ospf redistribute rapng-vpn
!
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