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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