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Re: links on the blink (fwd)
At 18:28 95/11/10, Vadim Antonov wrote: >Michael Dillon wrote: > >>By "load sharing" I presume you mean some sort of TDM where you have n >>real lines and every n'th packet goes out on any particular line. I >>suppose this would be even simpler to do at the byte level if we assume >>that all n lines go to the same endpoint. > >Yep. However the round-robin load-sharing you described breaks the >sequencing of packets (i.e. they will often arrive in the different >order from which they were sent) and that breaks a lot of TCP stacks >out there. Cisco's solution is to to do sharing on per-host or per-network >basis (i.e. all packets to host/network go along the same path) which >is, to say, of very little use in the backbone. It breaks down particularly >spectacularly when you have high degree of aggregation or "calling centers", >i.e. hosts or networks attracting particularly heavy traffic. > >I have a simple solution for the sequencing problem in load sharing >setups, which produces load patterns nearly as good as round-robin. >Don't ask how if you're not going to invest :) That algorithm is >central to the proposed hypercube router architecture, and i'm >past the age when i did things just for fun. > >--vadim Vadim! You've already said too much!! :_) Robert.