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Chapter 4

OSPF Areas

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, E - EGP

i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2,

* - candidate default

U - per-user static route, o - ODR

Gateway of last resort is not set

10.0.0.0/24 is subnetted, 1 subnets

O IA 10.11.230.0 [110/74] via 172.16.20.6, 00:00:24,

Serial1

172.16.0.0/16 is variably subnetted, 4 subnets, 3

masks

O 172.16.241.1/32 [110/65] via 172.16.10.6,

00:01:28, Serial0

C 172.16.240.0/24 is directly connected, Loopback0

C 172.16.20.4/30 is directly connected, Serial1

C 172.16.10.4/30 is directly connected, Serial0

RouterA#

RouterB#sho ip ospf neig

Neighbor ID Pri State Dead Time Address Interface

172.16.20.6 1 FULL/DR 00:00:33 10.11.230.21 Ethernet0

172.16.240.1 1 FULL/ - 00:00:32 172.16.10.5 Serial0

RouterB#sho ip route

Codes: C - connected, S - static, I - IGRP, R - RIP,