December 2006
Intermediate to advanced
1188 pages
72h 8m
English
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Finding an IP Route
Problem
You want to find a particular route in your router’s routing tables.
Solution
The EXEC level command to look at the entire IP routing table is:
Router>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 172.25.1.1 to network 0.0.0.0
192.168.17.0/27 is subnetted, 1 subnets
C 192.168.17.0 is directly connected, Loopback1
172.16.0.0/30 is subnetted, 1 subnets
C 172.16.1.0 is directly connected, Async1
172.25.0.0/16 is variably subnetted, 6 subnets, 3 masks
C 172.25.25.0/30 is directly connected, Tunnel0
C 172.25.1.0/24 is directly connected, Ethernet0
C 172.25.9.0/24 is directly connected, Ethernet1
C 172.25.10.1/32 is directly connected, Loopback0
O 172.25.100.1/32 [110/11] via 172.25.9.2, 4d09h, Ethernet1
O IA 172.25.100.0/24 [110/11] via 172.25.1.1, 2d11h, Ethernet0
192.168.1.0/32 is subnetted, 1 subnets
S 192.168.1.1 [1/0] via 172.25.1.4
O*E1 0.0.0.0/0 [110/11] via 172.25.1.1, 1d07h, Ethernet0You can also find the route to a particular device, such as
172.25.100.15:
Router>show ip routeRouting entry for 172.25.100.0/24 Known via "ospf 55", distance 110, metric 11, type inter area Redistributing ...172.25.100.15
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.