On 7/19/2010 5:12 AM, Yaakov Stein wrote: > Danny > >> The reality is that there is something like a 10-15 year rollout >> of any scheme in new hardware that will be able to deploy such PTP/1588 types of networks unless there is a clear and pressing reason to do so. In that case the protocol *must* be right or the whole thing will die under its own weight. > > That depends on what kind of network you are talking about. > I have seen greenfield SP networks built up in less than a year. >
I don't disagree with this but in general networks live a long time on existing hardware on the basis of what works does not need to be replaced. Only compelling reasons (think Money) will get network gear replaced. > >> What I haven't seen anywhere is any analysis of how all of the processing that is necessary for example in the MPLS proposal, will affect things like latency, jitter, precision, etc. of the resultant packets to the recipient client system. If it cannot deliver better results than what is currently available then there's no point to the whole exercise. > > If the requirement is to deliver highly accurate frequency and/or ToD to > network > elements of the service provider, e.g., cellular base stations, > the results can be dramatically better. That's the hope for all of this, but someone needs to look at the overhead involved and make sure that this continues to be true with the proposed implementations over MPLS for example. > I agree if this is delivered to an uncontrolled client network then the > exercise > might not be worthwhile. Rubber hits road. Danny _______________________________________________ TICTOC mailing list [email protected] https://www.ietf.org/mailman/listinfo/tictoc
