Cisco Systems 78-11741-02 manual Complex Ospf Configuration Example, IPC-388

Configuring IP Routing Protocol-Independent Features

IP Routing Protocol-Independent Configuration Examples

router bgp 50000 network 192.168.0.0 network 10.0.0.0

neighbor 172.16.1.6 remote-as 60000

Complex OSPF Configuration Example

The following example configuration accomplishes several tasks in setting up an ABR. These tasks can be split into two general categories:

•Basic OSPF configuration

•Route redistribution

The specific tasks outlined in this configuration are detailed briefly in the following descriptions. Figure 64 illustrates the network address ranges and area assignments for the interfaces.

Figure 64 Interface and Area Specifications for OSPF Configuration Example

Network address range:

192.168.110.0 through 192.168.110.255 Area ID: 192.168.110.0

					Network address range:
	Router A		E0		172.19.251.0 through 172.19.251.255
		E3		E1	Area ID: 0
					Configured as backbone area
				E2
Network address range:
10.56.0.0 through 10.56.255.255
	Network address range:
Area ID: 10.0.0.0
Configured as stub area	172.19.254.0 through 172.19.254.255					S1031a
	Configured as backbone area
	Area ID: 0

The basic configuration tasks in this example are as follows:

•Configure address ranges for Ethernet interface 0 through Ethernet interface 3.

•Enable OSPF on each interface.

•Set up an OSPF authentication password for each area and network.

•Assign link-state metrics and other OSPF interface configuration options.

•Create a stub area with area ID 10.0.0.0. (Note that the authentication and stub options of the area router configuration command are specified with separate area command entries, but they can be merged into a single area command.)

•Specify the backbone area (area 0).

Configuration tasks associated with redistribution are as follows:

•Redistribute IGRP and RIP into OSPF with various options set (including metric-type, metric, tag, and subnet).

•Redistribute IGRP and OSPF into RIP.

The following is an example OSPF configuration:

Cisco IOS IP Configuration Guide

IPC-388