This document uses these configurations. ip unnumbered Ethernet2/0/0 router ospf 1 network area 0. Redistribution Configuration Syntax and Examples. IGRP and EIGRP. OSPF. RIP. Redistributing Static Routes Except Gateway of Last resort in. This article describes some basic OSPF configuration.

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To verify if the osf updated were exchanged, we can use the show ip route command. Home About Contact Support our work. The network commands entered on both routers include subnets directly connected to both routers.

This can be done by using the following sequence of commands on both routers:. We can verify that the routers have become neighbors by typing the show ip configurtaion neighbors command on either router:.

As you can see from the network topology depicted above, routers R1 and R3 are in the area 0 and area 1, respectively. Configure the device interfaces.

We will use the following network topology:. All other networks or areas in the AS must be directly connected to the backbone area by area rohtage routers that have interfaces in configuraiton than one area. Characters IA in front of the routes indicate that these routes reside in different areas. Jan 26, upravnik. Because R1 connects only configuratoon R2, we only need to establish a neighbor relationship with R2 and advertise directly connected subnet into OSPF.


In an autonomous system ASthe backbone area is always assigned area ID 0. You must also create a backbone area if your network consists of multiple areas. OSPF basic configuration is very simple. For a single-area OSPFv3 network, include the ospf3 statement at the [edit protocols] hierarchy level. First, we need to enable OSPF on both routers.

We can verify that by using the show ip ospf neighbor command:. Confirm your configuration by entering the show protocols ospf command. R3 is in the area 1. To quickly configure a single-area OSPF network, copy the following commands, paste them into a text file, remove any line breaks, change any details necessary to match your network configuration, copy and paste the commands into the CLI at the [edit] hierarchy level, and then enter commit from configuration mode.

OSPF configuration

We can do that using the following sequence of commands:. To do that, we need to specify different area ID for each neighbor relationship, 0 for R1 and 1 for R2.

Our goal is to advertise the subnets directly connected to R1 and R3. To confirm your OSPFv3 configuration, enter the show protocols ospf3 command.

OSPF configuration

Now R2 should have neighbor relationship with both R1 and R3. NOTE We have used the router-id 1. Configuration of R3 looks similar, but with one difference, namely area number. Area IDs are unique numeric identifiers, in dotted decimal notation.


Confirm that the Area field displays the value that you configured. Then we need to define what network will be advertised into OSPF. Next, you need to define on which interfaces OSPF will run and what networks will be advertised.

Configuration du routage ospf – routeur Cisco

To verify if directly connected subnets are really advertised into the different area, we can use the show ip route ospf command on both R1 and R Area IDs need only be unique within an AS.

For example, here is the output of the command on R Configure the router identifiers for the devices in your OSPF network. In this example we have two OSPF areas — area 0 and area 1. If the output does not display the intended configuration, repeat the instructions in this example to correct the configuration. To do that, the following configuration on R1 will be used:.