Configuring PTP transparent-clock mode

Use the Precision Time Protocol (PTP) transparent-clock mode to measure the overall path delay for packets in a network to improve the time precision. There are two transparent-clock modes:

• End-to-end measures the path delay for the entire path
• Peer-to-peer measures the path delay between each pair of nodes

For more information about using PTP on FortiSwitch units, see Precision Time Protocol.

Use the following steps to configure PTP transparent-clock mode:

1. Configure a PTP profile or use the default profile.

2. Configure the PTP settings.

   By default, PTP is disabled. Enable PTP and select which PTP profile will use these PTP settings. The default profile is automatically selected. If you have multiple PTP profiles, each managed switch can use a different PTP profile.

3. Configure the default PTP policy or create a custom PTP policy.

   Select which VLAN will use the PTP policy and the priority of the VLAN. The default PTP policy is applied to all ports. If you want to select which ports to apply the PTP policy to, you need to create a custom PTP policy. Each switch port can be configured with a different PTP policy.

4. If you are not using the default PTP policy, select which port to apply your custom PTP policy to.

   By default, the PTP status is enabled.

   NOTE: Setting ptp-policy on a switch interface is valid only in peer-to-peer mode.

To configure a PTP profile:

config switch-controller ptp profile

edit {default | name_of_PTP_profile}

set description <description_of_PTP_profile>

set mode {transparent-e2e | transparent-p2p}

set ptp-profile C37.238-2017

set transport l2-mcast

set domain <0-255> // the default is 254

set pdelay-req-interval {1sec | 2sec | 4sec | 8sec | 16sec | 32sec} // 1sec default

next

end

For example:

config system ptp profile

edit newPTPprofile

set description "New PTP profile"

set mode transparent-p2p

set ptp-profile C37.238-2017

set transport l2-mcast

set domain 1

set pdelay-req-interval 2sec

next

end

To configure the PTP settings:

config switch-controller managed-switch

edit <FortiSwitch_serial_number>

set ptp-status {enable | disable} // the default is disable

set ptp-profile {default | name_of_PTP_profile} // the default is "default"

next

end

For example:

config switch-controller managed-switch

edit S524DF4K15000024

set ptp-status enable

set ptp-profile newPTPprofile

next

end

To configure the default PTP policy or create a custom PTP policy:

config switch-controller ptp interface-policy

edit {default | <policy_name>}

set description <description_of_PTP_policy>

set vlan <VLAN_name> //no default

set vlan-pri <0-7> // the default is 4

next

end

For example:

config switch-controller ptp interface-policy

edit ptppolicy1

set description "New custom PTP policy"

set vlan vlan10

set vlan-pri 3

next

end

To apply your custom PTP policy to a port:

config switch-controller managed-switch

edit <FortiSwitch_serial_number>

config ports

edit <port_name>

set ptp-status {enable | disable} // the default is enable

set ptp-policy {default | <policy_name>} // the default is "default"

end

end

For example:

config switch-controller managed-switch

edit S524DF4K15000024

config ports

edit port5

set ptp-status enable

set ptp-policy ptppolicy1

end

end