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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: packet reordering at exchange points
Thus spake "Iljitsch van Beijnum" <[email protected]> > But how is packet reordering on two parallell gigabit interfaces > ever going to translate into reordered packets for individual > streams? Think of a large FTP between two well-connected machines. Such flows tend to generate periodic clumps of packets; split one of these clumps across two pipes and the clump will arrive out of order at the other end. The resulting mess will create a clump of retransmissions, then another bigger clump of new data, ... > Packets for streams that are subject to header compression or > for voice over IP or even Mbone are nearly always transmitted > at relatively large intervals, so they can't travel down parallell > paths simultaneously. RTP reordering isn't a problem in my experience, probably since RTP has an inherent resequencing mechanism. The problem with RTP is that if the packets don't follow a deterministic path, the header compression scheme is severely trashed. Also, non-deterministic paths tend to increase jitter, requiring more bufferring at endpoints. S
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