The session status for an IPsec tunnel with IPv6-in-IPv4 is down with the error message IKE
message from 10.10.1.1 failed its sanity check or is malformed.
Which statement describes a possible cause of this error?
A.
There is a verification failure on the IPsec packet.
B.
The SA has expired or has been cleared.
C.
The pre-shared keys on the peers are mismatched.
D.
There is a failure due to a transform set mismatch.
E.
An incorrect packet was sent by an IPsec peer.