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What were the implications? There were other issues, but fundamentally … Unauthenticated notifications = neutered responses “Advisory notifications” – don’t ignore the ACK stream Link Down as DoS bait Stop transmitting before transport detects loss? Based on unauthenticated notification? NO! Notification had to be advisory – add complexity SCTP interest for switchover – if they could trust it Packets Discarded = loss without congestion Retransmit without slowing down? Based on unauthenticated notification? NO! Notification had to be advisory – add complexity Loss Due To Errors as extreme case |