Hi Ted, On Fri, Aug 21, 2015 at 12:19 AM, Ted Lemon <[email protected]> wrote:
> On Aug 11, 2015, at 7:25 PM, Alia Atlas <[email protected]> wrote: > > It sounds to me like using multiple paths (ECMP or otherwise) is > something that hasn't been clearly nailed down in the requirements? > > Putting ECMP in the requirements seems like a terrible idea. I don’t > think there’s a need for it, for two reasons. First, none of the > applications you described actually require it. Yes, you’d get better > performance if they had it, so it would be a nice value-added feature. > But it is not a base requirement for the homenet to function. Second, > did you read my description of the typical homenet user’s mental model of > what a homenet looks like a week ago? I think this is a key point: the > end user has no idea what ECMP is, what its operational characteristics > are, what links it might function over, etc. So ECMP would have to > self-configure, and that includes the sort of stuff Juliusz was talking > about—noticing interfering versus non-interfering paths, etc. This is a > research project. I think it would be great if homenet could do this work > at some point in the future, but it is not something that should be part of > the base requirements for the homenet, because if it were, it would delay > availability of a complete homenet spec by years. > ECMP or downstream paths is not a research project; it is common used technology. When the traffic streams desired are larger than can fit across a single path, it becomes critical. Figuring out how to handle interfering vs. non-interfering paths is, I think, orthogonal to ECMP. The multiple links that might interfere can easily be used for different destinations. While interesting, that seems like a problem that can needs solving already. Is that piece of the problem a research project? Figuring out what links interfere? Is this something that would need a centralized view of the home network? >From a user's perspective, use of multiple paths would be transparent - except that they'd see better performance through their network. There can be high-bandwidth demands like data backup or streaming multiple high-def video. Regards, Alia
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