About ASR9K Ethernet SLA one-way measurement

Question

Hi all,
I have a question for Y.1731 one-way delay, one-way-delay variance measurement in ASR9K.
From the configuration guide document, it says that in order to monitor the one-way metrics, there must be valid DTI input into RSP card on ASR9K router at both ends (details below). I am wondering if there is any other alternative like deriving time from PTPv2? It is less likely to have DTI connection for all the routers.
To configure one-way delay measurements, be sure that the following clocking prerequisites are met:
•Frequency synchronization is configured globally in its default line timing mode (The clock-interface timing mode command is not configured.)
•The clock interface (Sync 0 / Sync 1) on the RSP is configured as a DTI port using the port-parameters dti command.
•Valid DTI input signals are available for the RSP clock-interface ports.
•Both Local and remote routers are using DTI timing input signals.
http://www.cisco.com/en/US/docs/routers/asr9000/software/asr9k_r4.2/interfaces/configuration/guide/hc42eoam.html#wp1040522
Thanks

Answer 1

Or is there option to support BITS or SyncE?