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9.2.2 Changes to the ECN Field within an IPsec Tunnel

9.2.2 Changes to the ECN Field within an IPsec Tunnel​

If the ECN Field is changed inappropriately within an IPsec tunnel, and this change is detected at the tunnel egress, then the receipt of a packet not satisfying the appropriate condition for its SA is an auditable event. An implementation MAY create audit records with per-SA counts of incorrect packets over some time period rather than creating an audit record for each erroneous packet. Any such audit record SHOULD contain the headers from at least one erroneous packet, but need not contain the headers from every packet represented by the entry.