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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 do that, the following configuration on R1 will be used:.

Example: Configuring a Single-Area OSPF Network

Characters IA in front of configuratiion routes indicate that these routes reside in different areas. Because R1 connects only to R2, we only need to establish a neighbor relationship with R2 and advertise directly connected subnet into OSPF.

Our goal is to advertise the conffiguration directly connected to R1 and R3. Configuration of R3 looks similar, but with one difference, namely area routave. For a single-area OSPFv3 network, include the ospf3 statement at the [edit protocols] hierarchy level. 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.

Example: Configuring a Single-Area OSPF Network – TechLibrary – Juniper Networks

Next, you need to define on which interfaces OSPF will run and what networks will be advertised. First, we need to enable OSPF on both routers. Configure the router identifiers for the devices in your OSPF network.


This can be done by using the following sequence of commands on both routers:. Now R2 should have neighbor relationship with both R1 and R3. All other networks or areas in the AS must be directly connected to the backbone area by area border routers that have interfaces in more than one area.

To confirm your OSPFv3 configuration, enter the show protocols ospf3 command. In an autonomous system ASthe backbone area is always assigned area ID 0. To do that, we need to specify different area ID for each neighbor relationship, 0 for R1 and 1 for R2. We can verify that by using the show ip ospf neighbor command:. Jan 26, upravnik.

For example, here is the output of the command on R To verify if the routing updated were exchanged, we can use the show ip route command. Confirm that the Area field displays the value that you configured. Configure the device interfaces.

As you can see from the network topology depicted above, routers R1 and R3 are in the area 0 and area 1, respectively. Osof is in the area 1. Home About Contact Support our work. Confirm your configuration by entering the show protocols ospf command.


We can verify that the routers have become neighbors by typing the show ip ospf neighbors command on either router:. We will use the following network topology:. OSPF basic configuration is very simple.

The network commands entered on both routers include subnets directly connected to both routers. We can do that using the configuratuon sequence of commands:. You must also create a backbone area if your network consists of multiple areas. Area IDs need only be unique within an AS.

OSPF configuration

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 NOTE We have used the router-id 1. In this example we have two OSPF areas — area 0 and area 1.

Then we need to define what network will be advertised into OSPF. If the output does not display the intended configuration, repeat the instructions in this example to correct the configuration. Area IDs are unique numeric identifiers, in dotted decimal notation.