Hi Greg, I went through your presentations in the TICTOC meeting. The work items are valid. However, I would like to raise discussion of the suitable standards group in the case of telecom profiles of PTP. My viewpoint is a mobile network vendor's.
Security Frequency synchronization without on-path support: 3GPP has specified the use of IPSEC for securing mobile backhaul if necessary. PTP can use the same IPSEC tunnels that are set up for the rest of the base station traffic. Thus, no new security methods are needed at least considering mobile backhaul. In the case of time synchronization with on-path support, if security-enabled, all PTP nodes need to authenticate their immediate neighbors in terms of synchronization. On the other hand, the data traffic rather needs end-to-end security, moreover with end-to-end encryption. Therefore, probably a separate security solution is needed for PTP. There is already an experimental annex in PTP, which covers security for PTP in general - i.e. not only for PTP/UDP/IP stack but also PTP/Ethernet stack. The solution has been verified by security experts of NIST. TICTOC should not declare itself as the owner of PTP security unless the timing community requests it. Management ITU-T Q13/SG15 has decided that management is out of scope of the PTP telecom profile for the time being. Telecom vendors have incorporated the management of packet timing into their network management systems. I don't see that the telecom companies have done a mistake in standards work that needs to be corrected by TICTOC. Surely it is possible to raise the management issue again in Q13 if needed. Conclusion I propose that the possible security & management work carried out in TICTOC would not concern telecom usage of PTP unless IETF and ITU decide together to do otherwise. Best regards, Antti Antti Pietilainen Nokia Siemens Networks Mobile transport research Linnoitustie 6 02600 ESPOO Finland tel. +358-71-8036660 _______________________________________________ TICTOC mailing list [email protected] https://www.ietf.org/mailman/listinfo/tictoc
