r-dt(config)#router ospf 1
r-dt(config-router)#ospf router-id 10.10.10.1
r-dt(config-router)#passive-interface default
r-dt(config-router)#network 10.10.10.0 0.0.0.3 area 0
r-dt(config-router)#network 192.168.33.88 0.0.0.3 area 0
r-dt(config-router)#no passive-interface tunnel.0
r-dt(config-router)#no passive-interface WAN
r-dt(config)#interface tunnel.<1>
(config-if)#ip ospf authentication
(config-if)#ip ospf authentication-key P@ssw0rd
r-hq(config)#exit
r-hq#write
r-dt(config)#router ospf 1
r-dt(config-router)#default-information originate
r-dt(config-router)#exit
r-dt(config)# write