Time synchronization method and device of distributed device
A distributed device and time synchronization technology, applied in the network field, can solve the problems of low time synchronization efficiency of distributed devices and achieve the effect of improving efficiency
Inactive Publication Date: 2018-01-05
NEW H3C TECH CO LTD
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Problems solved by technology
[0005] The present disclosure provides a method and device for time synchronization of distributed equipment to solve the problem of low efficiency of time synchronization of existing distributed equipment
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[0035] In order to solve the technical problems raised in the background art, the inventors of the present disclosure analyzed the existing methods for time synchronization of distributed devices. In the existing time synchronization method for distributed devices, the service board sends the time difference DeltaT calculated based on the PTP protocol on the service board to the CPU of the main control board through inter-board CPU message communication. The CPU of the main control board adjusts the global clock module according to the time difference DeltaT, and then the global clock module synchronizes to the clock modules of each service board through the BUS interface. In this method, the time difference DeltaT calculated by the service board cannot perform clock adjustment immediately, and the service board needs to obtain the setting reply information from the main control board before performing the next time synchronization, resulting in low time synchronization efficie...
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The invention discloses a time synchronization method and device of a distributed device. The method is applied to a first service veneer of the distributed device and comprises the steps that an accurate time protocol PTP message sent by an upstream device is received; the time difference of the upstream device is determined according to the PTP message; the time of a clock module is adjusted according to the time difference; the adjusted time is sent to a global clock module of a main control veneer through the clock module and a clock synchronization bus so as to synchronize the times of other service veneers according to the adjusted time. After the first service veneer obtains the time difference, the time of the clock module of the veneer can be adjusted in real time without set reply information of the main control veneer, and then next-time time synchronization is performed. In addition, the global clock module of the main control veneer directly receives the adjusted time sentby the first service veneer through the clock synchronization bus, the times of other service veneers can be synchronized, and the time synchronization efficiency can be improved.
Description
technical field [0001] The present disclosure relates to the field of network technologies, and in particular to a time synchronization method and device for distributed devices. Background technique [0002] Distributed devices in the network generally include a main control board and multiple service boards. The main control board is used for global control and is equipped with a global clock module; each service board is equipped with a clock module, and the time of the clock module on each service board needs to be consistent with the time of the global clock module on the main control board . [0003] The Precision Time Protocol (Precision Time Protocol, PTP) is a packet-based time synchronization technology. Devices exchange packets through Ethernet to achieve time synchronization. Such as figure 1 As shown, the three devices are connected through Ethernet ports A, B, C, and D. Device 1 is the original clock Grand Master device in this network. It exchanges PTP pack...
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Inventor 许良掌王东
Owner NEW H3C TECH CO LTD