OSPF NSSA routes: O IA, O N1, O N2

May 6, 2007 at 10:03 pm | Posted in Blogroll, OSPF, Routing | Leave a comment

In addition to the Intra Area type (O), the following route types can exist in an NSSA router. 

 CE1#sh run

interface FastEthernet0
 ip address 50.50.50.10 255.255.255.0
 speed 10
 full-duplex
!
interface Serial0
 ip address 32.29.1.2 255.255.255.252
 clockrate 4000000

router ospf 100
 log-adjacency-changes
 area 1 nssa
 network 32.29.1.2 0.0.0.0 area 1
 network 50.50.50.0 0.0.0.255 area 1

CE1#sh ip route
Codes: C – connected, S – static, R – RIP, M – mobile, B – BGP
       D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inter area
       N1 – OSPF NSSA external type 1, N2 – OSPF NSSA external type 2
       E1 – OSPF external type 1, E2 – OSPF external type 2
       i – IS-IS, su – IS-IS summary, L1 – IS-IS level-1, L2 – IS-IS level-2
       ia – IS-IS inter area, * – candidate default, U – per-user static route
       o – ODR, P – periodic downloaded static route

Gateway of last resort is not set

S    200.200.200.0/24 is directly connected, Null0
     50.0.0.0/24 is subnetted, 1 subnets
C       50.50.50.0 is directly connected, FastEthernet0
     32.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
C       32.34.1.1/32 is directly connected, Loopback0
O IA    32.29.1.12/30 [110/192] via 32.29.1.1, 00:04:48, Serial0
O IA    32.29.1.8/30 [110/128] via 32.29.1.1, 00:04:48, Serial0
C       32.29.1.0/30 is directly connected, Serial0
O N1 130.130.0.0/16 [110/84] via 32.29.1.1, 00:03:47, Serial0
     165.87.0.0/32 is subnetted, 3 subnets
O IA    165.87.1.3 [110/193] via 32.29.1.1, 00:04:49, Serial0
O IA    165.87.1.2 [110/129] via 32.29.1.1, 00:04:49, Serial0
O IA    165.87.1.1 [110/65] via 32.29.1.1, 00:04:49, Serial0
O N2 150.150.0.0/16 [110/20] via 50.50.50.150, 00:04:50, FastEthernet0
CE1#

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