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Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide

OL-5332-01

Chapter 1 Basic Router Configuration

Configuring Dynamic Routes

Configuration Example

In the following configuration example, the static route sends out all IP packets with a destination IP

address of 192.168.1.0 and a subnet mask of 255.255.255.0 on the Fast Ethernet interface to another

device with an IP address of 10.10.10.2. Specifically, the packets are sent to the configured PVC.

You do not need to enter the commands marked “(default).” These commands appear automatically in

the configuration file generated when you use the show running-config command.

ip classless (default)

ip route 192.168.1.0 255.255.255.0 10.10.10.2!

Verifying Your Configuration

To verify that you have properly configured static routing, enter the show ip route command and look

for static routes signified by the “S.”

You should see verification output similar to the following example.

Router# show ip route

Codes: C - connected, S - static, 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

i - IS-IS, su - IS-IS summary, 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

10.0.0.0/24 is subnetted, 1 subnets

C 10.108.1.0 is directly connected, Loopback0

S* 0.0.0.0/0 is directly connected, FastEthernet0

Configuring Dynamic Routes

In dynamic routing, the network protocol adjusts the path automatically, based on network traffic or

topology. Changes in dynamic routes are shared with other routers in the network.

The Cisco routers can use IP routing protocols, such as Routing Information Protocol (RIP) or Enhanced

Interior Gateway Routing Protocol (EIGRP), to learn routes dynamically. You can configure either of

these routing protocols on your router.

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Cisco 850 Series Manual de usuario Pagina 12