Enable the Internet Protocol Security (IPsec) policy created under the OSPF virtual link.
default ip area virtual-link {A.B.C.D} {A.B.C.D} ipsec enable
ip area virtual-link {A.B.C.D} {A.B.C.D} ipsec enable
no ip area virtual-link {A.B.C.D} {A.B.C.D} ipsec enable
The default is disabled.
OSPF Router Configuration