Nortel Networks NN47200-503 manual End

146IP Routing Configuration and Management

3Enable OSPF.

Configure R1 as an ABR. Note that, by default, OSPF interface 10.1.1.22 is placed into OSPF area 0.0.0.0. Because one additional area of 0.0.0.2 is created and OSPF interface 10.1.1.17 is added to area 0.0.0.2, R1 automatically becomes an ABR.

5530-24TFD(config-router)# router-id 1.1.1.2

5530-24TFD(config-router)# area 0.0.0.2

5530-24TFD(config-router)# network 10.1.1.17 area 0.0.0.2

5530-24TFD(config)# router ospf enable

4Configure area range.

Configure R1 to enclose the two networks (172.3.3.0 and 172.3.4.0) into an address range entry 172.3.0.0 in area 0.0.0.2. R1 will generate a single summary advertisement into the backbone for 172.3.0.0 with metric 100.

5530-24TFD(config-router)# area 0.0.0.2 range 172.3.0.0/16 summary-link advertise-mode summarize advertise-metric 100

—End—

To display the created areas, use the show ip ospf area command. Usage of this command on the example configuration would yield the following output:

Area ID: 0.0.0.0

Import Summaries: Yes

Import Type: External

Intra-Area SPF Runs: 2

Reachable Area Border Routers: 0

Reachable Autonomous System Border Routers: 0

Link-State Advertisements: 0

Link-State Advertisements Checksum: 0(0x0)

Area ID: 0.0.0.2

Import Summaries: Yes

Import Type: External

Intra-Area SPF Runs: 2

Reachable Area Border Routers: 1

Reachable Autonomous System Border Routers: 0

Link-State Advertisements: 0

Link-State Advertisements Checksum: 0(0x0)

To display area ranges, use the show ip ospf area-rangecommand. Usage of this command on the example configuration would yield the following output:

Nortel Ethernet Routing Switch 5500 Series

Configuration-IP Routing Protocols

NN47200-503 03.01 Standard

5.127 August 2007

Copyright © 2005-2007, Nortel Networks