Dans notre exemple, le routeur R4 peut atteindre le réseau 66.6.6.0/24 (R6) via R5 et R6 :
R4#show ip ospf database summary 66.6.6.0 OSPF Router with ID (10.11.11.1) (Process ID 1) Summary Net Link States (Area 0) Routing Bit Set on this LSA LS age: 175 Options: (No TOS-capability, DC, Upward) LS Type: Summary Links(Network) Link State ID: 66.6.6.0 (summary Network Number) Advertising Router: 10.2.2.3 LS Seq Number: 80000011 Checksum: 0xBC0 Length: 28 Network Mask: /24 TOS: 0 Metric: 2 Routing Bit Set on this LSA LS age: 215 Options: (No TOS-capability, DC, Upward) LS Type: Summary Links(Network) Link State ID: 66.6.6.0 (summary Network Number) Advertising Router: 10.2.2.5 LS Seq Number: 80000003 Checksum: 0x1BBC Length: 28 Network Mask: /24 TOS: 0 Metric: 2
R4#show ip route 66.6.6.0 Routing entry for 66.6.6.0/24 Known via "ospf 1", distance 110, metric 3, type inter area Last update from 10.1.1.3 on FastEthernet0/0, 00:02:36 ago Routing Descriptor Blocks: * 10.1.1.5, from 10.2.2.5, 00:02:36 ago, via FastEthernet0/0 Route metric is 3, traffic share count is 1 10.1.1.3, from 10.2.2.3, 00:02:36 ago, via FastEthernet0/0 Route metric is 3, traffic share count is 1
« max-metric router-lsa » permet au routeur R5 de faire ses annonces OSPF avec un metric maximum
Configuration
R5(config)#router ospf 1 R5(config-router)#max-metric router-lsa
Vérifications:
R4#show ip ospf database summary 66.6.6.0 OSPF Router with ID (10.11.11.1) (Process ID 1) Summary Net Link States (Area 0) Routing Bit Set on this LSA LS age: 241 Options: (No TOS-capability, DC, Upward) LS Type: Summary Links(Network) Link State ID: 66.6.6.0 (summary Network Number) Advertising Router: 10.2.2.3 LS Seq Number: 80000011 Checksum: 0xBC0 Length: 28 Network Mask: /24 TOS: 0 Metric: 2 Routing Bit Set on this LSA LS age: 16 Options: (No TOS-capability, DC, Upward) LS Type: Summary Links(Network) Link State ID: 66.6.6.0 (summary Network Number) Advertising Router: 10.2.2.5 LS Seq Number: 80000004 Checksum: 0xDCA Length: 28 Network Mask: /24 TOS: 0 Metric: 65536
R4#show ip route 66.6.6.0 Routing entry for 66.6.6.0/24 Known via "ospf 1", distance 110, metric 3, type inter area Last update from 10.1.1.3 on FastEthernet0/0, 00:00:12 ago Routing Descriptor Blocks: * 10.1.1.3, from 10.2.2.3, 00:00:12 ago, via FastEthernet0/0 Route metric is 3, traffic share count is 1