Static Routing and Distance Vector Routing Protocols - CCIE Routing and Switching Exam Certification Guide - page 342

Example 7-22 Output for show ip route on Router9

Router9#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, 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

172.16.0.0/24 is subnetted, 4 subnets
C 172.16.4.0 is directly connected, Serial0
C 172.16.1.0 is directly connected, Ethernet0
I 172.16.2.0 [100/8576] via 172.16.4.2, 00:00:36, Serial0
I 172.16.3.0 [100/1163] via 172.16.1.2, 00:01:13, Ethernet0

I 172.16.2.0 [100/8576] via 172.16.4.2
I 172.16.3.0 [100/1163] via 172.16.1.2

The output of the show ip route command for Router10 is shown in Example 7-23. For
Router10, network 172.16.1.0 has an IGRP metric of 8576 and network 172.16.3.0; the IGRP
metric is 8639, through the serial interface.

Example 7-23 Output for show ip route on Router10

Router10>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, 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

172.16.0.0/24 is subnetted, 4 subnets
C 172.16.4.0 is directly connected, Serial0
I 172.16.1.0 [100/8576] via 172.16.4.1, 00:00:04, Serial0
C 172.16.2.0 is directly connected, Ethernet0
I 172.16.3.0 [100/8639] via 172.16.4.1, 00:00:04, Serial0

I 172.16.1.0 [100/8576] via 172.16.4.1

I 172.16.3.0 [100/8639] via 172.16.4.1

IGRP Summary
The characteristics of IGRP are summarized as follows:
•

Distance vector protocol.

•

Uses IP protocol 9.