ESR3(config)# router ospf log-adjacency-changes
ESR3(config)# router ospf 1
ESR3(config-ospf)# router-id 3.3.3.3
ESR3(config-ospf)# area 0.0.0.0
ESR3(config-ospf-area)# enable
ESR3(config-ospf-area)# exit
ESR3(config-ospf)# enable
ESR3(config-ospf)# exit
ESR3(config)#
ESR3(config)# interface loopback 1
ESR3(config-loopback)# ip address 3.3.3.3/32
ESR3(config-loopback)# ip ospf instance 1
ESR3(config-loopback)# ip ospf
ESR3(config-loopback)# exit
ESR3(config)#
ESR3(config)# interface gigabitethernet 1/0/1.20
ESR3(config-subif)# ip firewall disable
ESR3(config-subif)# ip address 20.20.20.1/30
ESR3(config-subif)# ip ospf instance 1
ESR3(config-subif)# ip ospf
ESR3(config-subif)# exit
ESR3(config)#
ESR3(config)# interface gigabitethernet 1/0/1.30
ESR3(config-subif)# ip firewall disable
ESR3(config-subif)# ip address 30.30.30.1/30
ESR3(config-subif)# ip ospf instance 1
ESR3(config-subif)# ip ospf
ESR3(config-subif)# exit
ESR3(config)#
ESR3(config)# system jumbo-frames
ESR3(config)# do commit
ESR3(config)# do confirm