Refer to the exhibit.
A customer has an IPsec tunnel that is configured between two remote offices. The customer is
seeing these syslog messages on Router B:
%CRYPTO-4-PKT_REPLAY_ERR: decrypt: replay check failed connection id=x, sequence
number=y
What is the most likely cause of this error?
A.
The customer has an LLQ QoS policy that is configured on the WAN interface of Router A.
B.
A hacker on the Internet is launching a spoofing attack.
C.
Router B has an incorrectly configured IP MTU value on the WAN interface.
D.
There is packet corruption in the network between Router A and Router B.
E.
Router A and Router B are not synchronized to the same timer source.
Explanation: