|
North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Questions about Internet Packet Losses
Yes, Bakul, keeping a central RTT cache per destination is a good idea. Most good stacks use it already. I think it was recommended in Host Requirements circa 1989. Keeping a per destination cache of Path RTT, Path MTU, and a Quality measurement was required in my initial IPng Neighbor Discovery design several years ago, before that was destroyed in the rewrite by committee. > From: Bakul Shah <[email protected]> > [Thinking aloud here...] > Perhaps a part of the TCP congestion avoidance algorithm can be > factored out in some sort of a `traffic central' module that tries > to give you the best bandwidth/packet loss estimate it has for a > given route provided you keep it updated with what you learn (i.e. > TCP tells it when a packet is lost etc). A new TCP connection can > then immediately start off with a bigger window (and won't open the > window too wide too quickly). Multiple connections between two > hosts can avoid what would be largely redundant estimate > computation. Even a UDP app. can try to benefit from this (such as > for communication where bounded delay is more critical than packet > loss). Other `traffic conditions' input can also be fed into this > module [perhaps as part of some future routing protocol]. Combining > this `quality' of a route aspect into routing protocols may make > sense in the long run.... > [email protected] Key fingerprint = 17 40 5E 67 15 6F 31 26 DD 0D B9 9B 6A 15 2C 32 [email protected] Key fingerprint = 2E 07 23 03 C5 62 70 D3 59 B1 4F 5E 1D C2 C1 A2 - - - - - - - - - - - - - - - - -
|