3.8.6.1 Expiration of the Delete Retransmission Timer

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When this timer expires, the initiator MUST retransmit message #1, as specified in section 3.8.4.1, and it SHOULD reset the timer to double the previous duration unless a total of four retransmissions has already occurred. If four retransmissions have occurred, the host MUST remove the corresponding MM SA or QM SA from the MMSAD or the SAD without retransmitting message #1 or resetting the timer.<24>

When each timer expires, if a message #2 has not been received and verified for that SA, as specified in section 3.8.5.2, it SHOULD retransmit the notification message for that SA without resetting the timer.