sfptpd can be used to enable hardware timestamping of all packets (to the Linux kernel) on specified interfaces. Interfaces are identified as a list using the following configuration file option:
timestamping_interfaces [<name | mac-address | *>]- To timestamp all received packets on all interfaces:
timestamping_interfaces * - To timestamp all received packets on eth2 and eth3:
timestamping_interfaces eth2 eth3
If hardware timestamping is required only for PTP packets, there is no need to enable this parameter.
Hardware Timestamps Enable/Disable
To enable/disable hardware timestamping of all received network packets after sfptpd exits, use the following configuration file option:
timestamping_disable_on_exit [<off | on>]Hardware Timestamps (Kernel/Onload)
Applications can recover hardware timestamps for all received packets using the
SO_TIMESTAMPING socket option. For more
details of hardware packet timestamps when using the kernel driver see the
Solarflare Server Adapter User Guide (SF-103837-CD). For more details
of using hardware packet timestamps when using OpenOnload see the
Onload User Guide (UG1586).