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[EFM] RE: OAM Proposals - a ping by any other name


I agree with you.  Preamble as it is may require a new chip set for all the 
test equipment.  A baseline including the "null" frame of a preamble 
without an Ethernet MAC frame will require the replacement of every piece 
of Ethernet test equipment that every enterprise and service provider 
currently has.  I am not sure that the industry can support that right now.

Thank you,
Roy Bynum

At 01:10 PM 4/22/2002 +0300, Romascanu, Dan (Dan) wrote:
> >
> > A system will send an OAMinP preamble approximately once
> > every 125u seconds,
> > either by substitution on the next available frame, or by
> > sending a null
> > frame. The null frame to be of current min size PDU, or
> > shorter, if EFM
> > defines such a new PDU for null frame.
> >
>I might have missed some previous discussions, but why should EFM define a 
>PDU null frame of a size shorter than the current min size PDU. This would 
>break all existing performance monitoring tools, and require a re-shuffle 
>of the size distribution counters in the existing standard Ethernet and