Hi Carlos Thanks for the review. Just picking up a couple of points at this stage, The PCW only supports a 16bit sequence number and it has the skip zero auto-signalling of active S/N feature. This was a problem for DetNet because: - We were worried about S/N rollover frequency in some applications and so we wanted the option of a larger S/N. - We wanted to have the option to propagate the S/N from the payload to the transport to simplify the implementation in some cases. These applications have a non-skip zero S/N. Skip zero is an irritation to implement and we should probably have signalled in in PWs. As you note in is only a preferred design for PWs, DetNet is not constrained by that and there were good reasons to adopt this alternate approach,
I think it just needs a “for example” and I think that it needs to be made clear that the design is not restricted to a single method of establishing an LSP nor to the characteristics and constraints that go with those LSPs.
Work has started on OAM, for example draft-mirsky-detnet-mpls-oam-00 The OAM for DetNet will be more complex than the OAM for a classical P2P or P2MP LSP (or PW) because of the PREOF function. There is nothing in the data plane that precludes us using on of the existing OAM indicators (GAL or 0001 ACH), but I think that it is important to thing through the subtleties. Thus I think it is OK to make progress on the elements of the data plane that we can nail down, and leave. The OAM as follow-up work.
This will get picked up on the next resin as part of the Nits check. Best regards Stewart |
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