Example Configuration Of Ospf Areas - HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual

For example, suppose that traffic between area 1 and the ABR must travel
over a relatively low-speed link. In this case, you might change the default-
cost setting to 20:
ProCurve(config-ospf)# area 1 default-cost 20

Example Configuration of OSPF Areas

The WAN shown in Figure 13-12 connects the company's headquarters to three
remote sites in a Frame Relay network. The headquarters makes up the
network backbone, and its WAN routers are the ABRs for the routers at the
remote sites. Each site is defined as a stub area. Area 2 is a total stub area.
The WAN router in this area has only the one connection for remote and
external traffic and does not need summary routes. Area 3 is an NSSA; it
connects to the Internet with an ASBR.
The organization uses the Class B network address 172.16.0.0, which it has
divided into 16 /20 subnets. It has grouped four of these subnets at each site.
Stub area 1
.5
Router B
172.16.80.0 /20
172.16.112.0 /
Figure 13-12. OSPF Area Configuration
172.16.16.0 /20
172.16.64.0 /20
.2
.2
.5
ABR A
.2
.4
Router C
.4
172.16.144.0 /20
IP Routing—Configuring RIP, OSPF, BGP, and PBR
Area 0
.2
172.16.128.0 /20
172.16.176.0 /20
Total
stub
area 2
Configuring OSPF
NSSA 3
172.16.192.0 /20
.1 ASBR .1
.1
172.16.224.0 /20
10.1.1.0 /30
Internet
13-49