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Chapter 5
IP Routing
I 172.16.40.0 [100/160260] via 172.16.10.2,
FastEthernet0/0
I 172.16.30.0 [100/158360] via 172.16.10.2,
FastEthernet0/0
I 172.16.20.0 [100/158260] via 172.16.10.2,
FastEthernet0/0
C 172.16.10.0 is directly connected,
FastEthernet0/0
The I means IGRP-injected routes. The 100 in [100/160360] is the
administrative distance of IGRP. The 160360 is the composite metric. The
lower the composite metric, the better the route.
Remember that the composite metric is calculated by using the bandwidth
and delay of the line by default. The delay of the line can also be referred to
as the cumulative interface delay.
The following output shows the routing table for the 2501A router.
2501A#sh ip route
[output cut]
172.16.0.0/24 is subnetted, 5 subnets
I 172.16.50.0 [100/160350] via 172.16.20.2,
00:00:49, Serial0
I 172.16.40.0 [100/160250] via 172.16.20.2,
00:00:49, Serial0
I 172.16.30.0 [100/158350] via 172.16.20.2,
00:00:49, Serial0
C 172.16.20.0 is directly connected, Serial0
C 172.16.10.0 is directly connected, Ethernet0
2501A#
The following router output shows the 2501B routing table.
2501B#sh ip route
[output cut]
172.16.0.0/24 is subnetted, 5 subnets
I 172.16.50.0 [100/8576] via 172.16.40.2,
00:01:11, Serial1
C 172.16.40.0 is directly connected, Serial1
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