On Which device is the fault condition located?
Configuration on R1 ip nat inside source list nat_pool interface s0/0/1 overload ip access-list standard nat_pool permit 10.1.0.0 permit 10.2.0.0 ! interface Serial0/0/1 ip address 209.65.200.225 255.255.255.252 ip nat outside ! interface Serial0/0/0.12 ip address 10.1.1.1 255.255.255.252 ip nat outside ip ospf message-digest-key 1 md5 TSHOOT ip ospf authentication message-digest...