I got the error on at least 100 of my locations out of 230. These are ISR4321s. The connections came back up about 20 min later. This happened in the middle of the night. The reason why it took 20 min to restore, might have been due to no traffic on the tunnel since it happened at about 1am or simply because if this error and it's outage. What does this exactly mean? Anyone encountered this problem before?
This is the error i got on all the 100 spokes
CDT: %CRYPTO-4-IKMP_NO_SA: IKE message from 1.1.1.1 has no SA and is not an initialization offer
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