Description: The cumulative number of fragments received by the NAT instance but dropped rather than translated. When the NAT instance supports the 'Receive Fragment Out of Order' capability as required by RFC 4787, this occurs because the fragment was received out of order and would be added to the queue of fragments awaiting the initial fragment of the chain, but the queue has already reached the limit set by natv2InstanceLimitsPendingFragments. Counting in other cases is specified in the description of natv2InstanceFragmentBehavior.

This value MUST be monotone increasing in the periods between updates of the entity's natv2InstanceDiscontinuityTime. If a manager detects a change in the latter since the last time it sampled this counter, it SHOULD NOT make use of the difference between the latest value of the counter and any value retrieved before the new value of natv2InstanceDiscontinuityTime.