ptp sync-interval

Function

The ptp sync-interval command sets the interval at which a PTP interface sends Sync packets.

The undo ptp sync-interval command restores the default interval at which a PTP interface sends Sync packets.

For details about the default values, see Parameter Description.

Format

ptp sync-interval sync-interval

undo ptp sync-interval

Parameters

Parameter	Description	Value
sync-interval	Specifies the interval at which a PTP interface sends Sync packets.	The value is an integer ranging from 0 to 20 for Ethernet cards. In 1588v2 mode, the default value is 3, which means 8/1024s. In G.8275.1 mode, the default value is 6. In CU-106 mode, the default value is 6. The mapping between sync-interval values and actual intervals is as follows: 0 1/1024s 1 2/1024s 2 4/1024s 3 8/1024s 4 16/1024s 5 32/1024s 6 64/1024s 7 128/1024s 8 256/1024s 9 512/1024s 10 1s 11 2s 12 4s 13 8s 14 16s 15 32s 16 64s 17 128s 18 256s 19 512s 20 1024s

Parameter

Description

Value

sync-interval

Specifies the interval at which a PTP interface sends Sync packets.

The value is an integer ranging from 0 to 20 for Ethernet cards.

In 1588v2 mode, the default value is 3, which means 8/1024s.
In G.8275.1 mode, the default value is 6.
In CU-106 mode, the default value is 6.

The mapping between sync-interval values and actual intervals is as follows:

0 1/1024s
1 2/1024s
2 4/1024s
3 8/1024s
4 16/1024s
5 32/1024s
6 64/1024s
7 128/1024s
8 256/1024s
9 512/1024s
10 1s
11 2s
12 4s
13 8s
14 16s
15 32s
16 64s
17 128s
18 256s
19 512s
20 1024s

Views

100GE interface view, 10G LAN interface view, 25GE interface view, 400GE interface view, 40GE interface view, 50GE interface view, FlexE-100G interface view, FlexE-400G interface view, FlexE-50G interface view, GE optical interface view, GE electrical interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
clksync	write

Usage Guidelines

Usage Scenario

Two devices exchange Announce packets to determine the master/slave relationship. The master device sends Sync packets to notify the slave device of time signal parameters and uses a delay measurement mechanism to achieve time signals accuracy.

The master interface periodically sends multicast Sync packets. If devices exchange Sync packets frequently and consume a lot of bandwidth resources, increase the sync-interval value. If time synchronization accuracy is low, reduce the sync-interval value.

Prerequisites

PTP has been enabled on the interface using the ptp enable command.

Precautions

The timestamp carried in a Sync message can be carried in a Sync message in one-step clock mode or in a Follow_Up message in two-step clock mode. To specify a timestamping mode, run the ptp clock-step { one-step | two-step } command.

Example

# Set the interval at which GE 0/1/0 sends Sync packets to 128/1024s.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet 0/1/0
[~HUAWEI-GigabitEthernet0/1/0] ptp sync-interval 7