Number of individual NAKs sent by the receiver transport (LBT-RM only)
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- n (Int32)
- Statistics set index
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Number of individual NAKs sent by the receiver.
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This may differ from the tally of lost datagrams (below) due to reasons such as
- Other receiver transports may have already sent a NAK for the same lost datagram, resulting in a retransmitted lost datagram (or an NCF) to arrive at this receiver transport before it has a chance to issue a NAK, or
- During periods of heavy loss, receiver transports may be forced to issue multiple NAKs per lost datagram (controlled by configuration options transport_lbtrm_nak_generation_interval and transport_lbtrm_nak_backoff_interval) until either the retransmission is received or the datagram is declared unrecovered (which may ultimately lead to UM delivering an LBM_MSG_UNRECOVERABLE_LOSS notification to the receiver application).