Switch User Manual

146 IP Routing Configuration and Management
3
Enable 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
4
Configure 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-range command.
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
5.1 27 August 2007
Copyright © 2005-2007, Nortel Networks
.