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Client systems should use the A and B Incremental Feeds to arbitrate as follows:

  1. Listen to packets from both Incremental Feed A and Incremental Feed B.

  2. Process packets by incremental sequence number.

  3. Discard a packet if the sequence number has already been processed.

  4. If a sequence number gap is detected, this indicates a packet was lost on both the Incremental Feed A and Incremental Feed B. In this scenario client systems must initiate the recovery procedure.