interface GigabitEthernet1
interface GigabitEthernet2
 ipv6 ospf adjacency stagger disable
 ipv6 ospf priority 20
 ipv6 ospf transmit-delay 30
interface GigabitEthernet3
 ip ospf adjacency stagger disable
 ip ospf ttl-security hops 50
 ip ospf 10 area 20
 ip ospf cost 30
 ip ospf priority 40
interface GigabitEthernet4
