The customer demonstrate the encryption by
disable the encryption and observe the test gear reporting link loss. The test
gear reports link loss in a second. Then the test back to normal.
No alarm information on this case
When the traffic
currently flow and you disable the encryption, the traffic will be interrupted
for a second. This is because a packet sending ( a packet during that time you
disable the encryption) has been encrypted and at the far-end site will not
decrypt the packet. As a result, the far-end client not recognize the packet
(due to the packet encrypted) and discard the packet.