Huawei Quidway S9300 Configuration Manual page 244

Quidway S9300 Terabit Routing Switch
Configuration Guide - Device Management
Step 3 Run:
ptp port-type { bc | tc }
The type of the 1588v2 interface either TC or BC.
Step 4 In the TC interface view, run:
ptp domain domain-value
The domain to which the 1588v2 interface belongs is configured.
Step 5 Run:
ptp delay-mechanism { delay | pdelay }
A delay measurement mechanism is configured for the device, which can be either of the
following:
l Delay mode:
l PDelay mode:
Step 6 Run:
ptp enable
1588v2 is enabled on the interface.
Step 7 (Optional) Run:
ptp announce-drop enable
The interface of the 1588v2 device is configured to discard the received Announce packets.
Step 8 (Optional) Run:
ptp asymmetry-correction { positive | negative } asymmetry-correction
The asymmetric correction time for sending 1588v2 packets on the interface is set.
Step 9 (Optional) Run:
ptp clock-step { one-step | two-step }
Issue 03 (2011-12-29)
NOTE
The 1588v2 clock domain configured in the system view is the domain to which the BC interface belongs,
and you do not need to configure a domain for the BC interface.
You can specify the domain that the TC interface belongs to in the interface view or use the 1588v2 clock
domain in the system view.
The TC interface forwards 1588v2 packets of all the domains. To forward 1588v2 packets of each domain
independently, you need to configure related packet forwarding mechanisms.
A delay request-response mechanism, in which information about the clock and time is
calculated according to the delay of the entire link between the master clock and slave clock.
A peer delay mechanism, in which information about the clock and time is calculated
according to the delay of each segment of the link between the master clock and slave clock.
NOTE
The delay measurement mechanisms on 1588v2 interfaces of the same link must be the same; otherwise,
the clock precision is imprecise.
NOTE
Announce packets can ensure the 1588v2 clock synchronization between devices. When an interface of
the 1588v2 device is configured to discard the received Announce messages, the 1588v2 device cannot
receive clock synchronization information from other devices through this interface. Usually, this command
is configured on the user-side interface of the 1588v2 device.
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