RE: [ippm] draft-shalunov-ippm-reporting-00.txt

Stas,

Real time and leased line services are characterised by an "availability". I think availability is a useful and common means to characterise these services. Today, there's only a meausurement principle for IP service availability. There's no commonly implemented IP service availability measurement (RFC2678 on connectivity proposes some metrics which may be useful).

The idea is that you define a service availability over time. If the service is available, the metrics you've listed below are applied to characterise the service. If the service is not available, then no further performance characterisation is required.

As more real time services start to be migrated to the Internet, measuring IP transport availability may be of interest. 

Regards, 

Rudiger

Carsten|> * additionally "availability" could be one metric
|>   (probably with param = (list of) server(s) or network)

Stas|Why aren't existing metrics enough?  When no packets 
|come through, you'll see
|
|delay = +infinity
|loss = 100%
|jitter = undefined
|duplication = 0%
|reordering = 0%
|
|Is that not enough?

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RE: [ippm] draft-shalunov-ippm-reporting-00.txt - availability