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Output of
show ip ospf database
Command on Router 3 from Figure 8-6 (Continued)
Example 8-7
192.16.100.32 192.16.100.4 585 0x80000001 0x4029
192.16.100.240 192.16.100.4 67 0x80000003 0xF79C
Summary ASB Link States (Area 10)
Link ID ADV Router Age Seq# Checksum
192.16.100.2 192.16.100.4 67 0x80000001 0xD2EE
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
10.0.0.0 192.16.100.2 73 0x80000001 0xBEC8 0
Router 3, which is an ABR, has LSAs for area 0 and area 10. Router 3 also lists the external
route for network 10.0.0.0. The output shows three routers in the Router Link State section for
area 0, and lists each router in area 0. Router 10 is listed, even though it is connected to area 0
through a virtual link.
The Router 3
show ip route
output shows all OSPF and connected routes, as shown in Example
8-8. Intra-area routes are labeled with O. Interarea routes are labeled with O IA; OSPF external
Type-2 routes are labeled with O E2.
Output of
show ip route
on Router 3 in Figure 8-6
Example 8-8
router3#show ip route
Codes: C - connected, S - static, I - IGRP, 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, 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
O E2 10.0.0.0/8 [110/1000] via 192.16.100.18, 00:00:01, Ethernet0
192.16.100.0/24 is variably subnetted, 9 subnets, 4 masks
O 192.16.100.128/27 [110/74] via 192.16.100.246, 00:21:09, Serial0.1
C 192.16.100.244/30 is directly connected, Serial0.1
O IA 192.16.100.240/30 [110/74] via 192.16.100.18, 00:00:01, Ethernet0
O IA 192.16.100.32/28 [110/84] via 192.16.100.18, 00:00:01, Ethernet0
C 192.16.100.16/28 is directly connected, Ethernet0
C 192.16.100.4/32 is directly connected, Loopback0
O 192.16.100.5/32 [110/65] via 192.16.100.246, 00:21:09, Serial0.1
O 192.16.100.2/32 [110/11] via 192.16.100.18, 00:00:12, Ethernet0
O IA 192.16.100.3/32 [110/75] via 192.16.100.18, 00:00:02, Ethernet0
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