Greg This version makes the mechanism more general so that in future other time-sensitive protocols (NTP, delay measurement OAM, generic header for MPLS) could avail themselves of its timestamping/correction features.
It is true that the only real case so far is 1588. Y(J)S From: [email protected] [mailto:[email protected]] On Behalf Of Gregory Mirsky Sent: 06 June, 2013 21:23 To: Shahram Davari; [email protected]; Bhatia, Manav (Manav); Roberts, Peter (Peter); [email protected]; [email protected] Subject: [TICTOC] NTP in draft-ietf-tictoc-1588overmpls-04 Dear Authors, et al., The draft-ietf-tictoc-1588overmpls-04 is currently titled as "Transporting Timing messages over MPLS Networks" and states that both timing synchronization protocols, PTP and NTP, require use of PTP LSP to transport timing messages over an MPLS network. After reading RFC 5905 I am not sure that PTP LSP, with its constraints and additional complexity, is required to transport NTPv4 messages over an MPLS network. And first paragraph in Section 3 Problem Statement of draft-ietf-tictoc-1588overmpls-04 explains motivation for the PTP as "There is a need to transport Timing messages over MPLS networks while supporting the Transparent Clock (TC), Boundary Clock (BC) and Ordinary Clock (OC) functionality in the LER and LSRs in the MPLS network." but says nothing of a kind about NTP. Regards, Greg
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