PTP can use the hardware assistance capability provided by any compatible NIC to improve the clock synchronization accuracy.
To determine whether a NIC provides hardware assistance to the ptpd daemon, issue the following command:
# dladm show-linkprop -p ptp
If the ptp property value that is displayed in the VALUE field of the output is 1 (one), then the corresponding NIC provides hardware assistance to the ptpd daemon.
You can configure the ptpd daemon to use the hardware assistance that is provided by a NIC. For more information, see How to Enable the PTP Service to Use the PTP Hardware in a NIC.
Example 1 Displaying the PTP Property of NICs in a System# dladm show-linkprop -p ptp LINK PROPERTY PERM VALUE EFFECTIVE DEFAULT POSSIBLE net1 ptp r- 0 0 0 -- net2 ptp r- 0 0 0 -- net0 ptp r- 0 0 0 -- net3 ptp r- 0 0 0 -- net6 ptp r- 0 0 0 -- net7 ptp r- 0 0 0 -- net4 ptp r- 1 1 0 -- net5 ptp r- 0 0 0 --
This example displays the ptp property value for the interface cards in the system. The integer 1 in the VALUE field for net4 indicates that net4 can provide hardware assistance to the ptpd daemon. Currently, NICs using the i40e driver support hardware assisted PTP.