Limitations of PTP

The following are the limitations of the current implementation of PTP:

Layer 2 transport is not supported.
IPv6-UDP transport is not supported.
Multicast event messages are not supported.
One-step timestamp functionality is not supported on 1G Fiber ports, 10G ports on CSR switches, and stacking ports.
Peer-to-peer delay mechanism is not supported.
PTP datasets are not maintained for end-to-end transparent clocks.
Domain number cannot be assigned to end-to-end transparent clocks.
Boundary clock does not support synchronizing clocks across multiple domains.
Distributing clock frequency recovered from SyncE or from BITS or from a TDM port over PTP is not supported.
Ordinary clock master (Grandmaster) mode is not supported.
Synchronizing system time with the time recovered from PTP event messages is not supported.
Time of Day (ToD) output and inputs are not supported.
Unicast message negotiation on clock ports is not supported.
PTP cannot be used if network clock source is configured as BITS.

Published March 2020prev | next