Information Technology Reference
In-Depth Information
Output from
show ip ospf database
and
show ip route
on Router 7 in Figure 8-6 (Continued)
Example 8-9
Gateway of last resort is not set
O E2 10.0.0.0/8 [110/1000] via 192.16.100.245, 00:05:31, Serial0.1
192.16.100.0/24 is variably subnetted, 9 subnets, 4 masks
C 192.16.100.128/27 is directly connected, Ethernet0
C 192.16.100.244/30 is directly connected, Serial0.1
O IA 192.16.100.240/30 [110/138] via 192.16.100.245, 00:05:32, Serial0.1
O IA 192.16.100.32/28 [110/148] via 192.16.100.245, 00:05:32, Serial0.1
O IA 192.16.100.16/28 [110/74] via 192.16.100.245, 00:05:32, Serial0.1
O IA 192.16.100.4/32 [110/65] via 192.16.100.245, 00:05:33, Serial0.1
C 192.16.100.5/32 is directly connected, Loopback0
O IA 192.16.100.2/32 [110/75] via 192.16.100.245, 00:05:33, Serial0.1
O IA 192.16.100.3/32 [110/139] via 192.16.100.245, 00:05:33, Serial0.1
The routers performing the functions of ASBR or ABR can be verified by using the
show ip
ospf border-routers
, as shown in Example 8-10.
Example 8-10
Output from
show ip ospf border-routers
Router7#show ip ospf border-routers
OSPF Process 100 internal Routing Table
Codes: i - Intra-area route, I - Inter-area route
I 192.16.100.2 [74] via 192.16.100.245, Serial0.1, ASBR, Area 10, SPF 6
i 192.16.100.4 [64] via 192.16.100.245, Serial0.1, ABR, Area 10, SPF 6
Only the ABRs in the same area as the router are displayed with this command, while all ASBRs
within the OSPF internetwork are displayed. 192.16.100.2 has a metric of 74. Remember that
the default OSPF cost for a T1 is 64 and the cost for Ethernet is 10. These are the links in the
path from Router 7 to the ASBR.
The OSPF virtual link is verified by using the
show ip ospf virtual
links
command. Example
8-11 displays the output of the command issued on Router 9.
Example 8-11
Output of
show ip ospf virtual-links
Command
Router9#show ip ospf virtual-links
Virtual Link OSPF_VL3 to router 192.16.100.3 is up
Run as demand circuit
DoNotAge LSA allowed.
Transit area 20, via interface Serial0, Cost of using 64
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:06
Adjacency State FULL (Hello suppressed)
continues
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