Cisco Systems 78-11741-02 This configuration, five routers are configured with Ospf, IPC-247

Configuring OSPF

OSPF Configuration Examples

Figure 42 Sample OSPF Autonomous System Network Map

OSPF domain (BGP autonomous system 50000)

				Area 1
Router A			Router B
E1	Interface address:		E2	Interface address:
				192.168.1.2
	192.168.1.1
			Network: 192.168.1.0
	E3		Interface address:
			192.168.1.3
	Router C
	S0	Interface address:
		192.168.2.3
Network: 192.168.2.0
			S1	Area 0
			Interface address:

Router D	192.168.2.4
E4

Interface address: 10.0.0.4

Network: 10.0.0.0		Interface address:
	E5	10.0.0.5
			Interface address:
Router E		S2	172.16.1.5

Network: 172.16.1.0

S1030a

In this configuration, five routers are configured with OSPF:

Remote address: 172.16.1.6

in autonomous system 60000

•Router A and Router B are both internal routers within area 1.

•Router C is an OSPF ABR. Note that for Router C, Area 1 is assigned to E3 and area 0 is assigned to S0.

•Router D is an internal router in area 0 (backbone area). In this case, both network router configuration commands specify the same area (area 0, or the backbone area).

•Router E is an OSPF ASBR. Note that BGP routes are redistributed into OSPF and that these routes are advertised by OSPF.

Cisco IOS IP Configuration Guide

IPC-247