RoE presentation time and late packets..

[Jouni Korhonen <000006d28467aeaf-dmarc-request@xxxxxxxx>]

Folks,

This is a preliminary material for an issue that we faced recently. The 
presentation time we have does not allow us reliably detect past 
timestamps i.e., late packets. This is not a format issue, rather an 
interpretation issue of the timestamp content + the associated 
presentation time calculation algorithm.

While this situation should never happen in a well engineered network 
errors do happen due whatever (human) reason. There is great value being 
able to detect past timestamps even if the specification would not say 
anything beyond that.. some other (OAM?) spec may then well take use of 
such feature..

So, without changing the on-wire format the slideset discusses how to 
detect past timestamps and proposes a clarification to the example 
algorithm and what needs to be clarified in the RoE spec to enable such 
feature. This is one item for next week bi-weekly call.

Feedback is always appreciated.

- JOuni

Attachment: tf3_1605_korhonen_past_ts_1.pptx
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