Greg Yes, a dedicated Ach is a possibility. I mentioned that as using the GAch format. I actually like this idea.
But why do you believe that this is any less of a layer violation ? The timestamps come from layer 1 (they are physical mechanisms) while MPLS is somewhere around layer 2 or higher. If the MPLS is carried over Ethernet or some other CRC protected layer 2, the CRC would need to be updated. If there is some integrity protection at layer 1 or 2 then it will break when we update the TC field, and the packet would be discarded. If there is layer 2 encryption, the mechanism won't be applicable unless we open and close the encryption at a link-by-link basis. Y(J)S -----Original Message----- From: Greg Mirsky [mailto:[email protected]] Sent: Wednesday, July 14, 2010 19:46 To: Yaakov Stein Cc: Alexander Vainshtein; [email protected] Subject: Re: [TICTOC] FW: 1588 over MPLS draft Dear Yaakov and All, <snip> > > <YJS> YES ! This is my method number 3. A new reserved label. Of course we > need to convince the MPLS > WG to give us one (there aren't that many ...) > GIM>> What if instead of LSP/PW as PTP transport we use dedicated to 1588 ACH in an MPLS-TP DCN? TC-capable nodes might be interconnected by DCN links and processing TC would not violate network layers. Regards, Greg _______________________________________________ TICTOC mailing list [email protected] https://www.ietf.org/mailman/listinfo/tictoc
