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Time synchronization method for stacking system, stacking system and member equipment

A technology for stacking systems and member devices, applied in transmission systems, digital transmission systems, time-division multiplexing systems, etc., can solve problems such as time synchronization of non-existent stacking systems

Active Publication Date: 2011-09-21
NEW H3C TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Stacking devices are network devices in the networking, and their internal member devices also need to perform high-precision time synchronization, but there is currently no specific method for time synchronization in the stacking system

Method used

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  • Time synchronization method for stacking system, stacking system and member equipment
  • Time synchronization method for stacking system, stacking system and member equipment
  • Time synchronization method for stacking system, stacking system and member equipment

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Embodiment Construction

[0064] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0065] The method provided by the present invention is as figure 1 As shown, it mainly includes the following processes:

[0066] Step 101: The stacking system, as a logical device, participates in the GM election of the external PTP network and the establishment of a synchronous spanning tree.

[0067] Step 102: Each member device in the stack system sends an internal notification message through the stack port to elect a GM and establish a synchronous spanning tree within the stack system; wherein, if the stack system is elected as a non-GM in the external PTP network, the slave service port The member device where it is located is elected as the GM.

[0068] In this step, if the stacking system is elected as the GM in the external PTP network...

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Abstract

The invention provides a time synchronization method for a stacking system, the stacking system and member equipment. The stacking system participates in the general member (GM) election and synchronous spanning tree establishment of an external precision time protocol (PTP) network as logic equipment; and in the stacking system, a GM in the stacking system is determined according to the elected role of the stacking system in the external PTP network, a synchronous spanning tree is established in the stacking system by an internal notification message, and an internal synchronization message is transmitted on the internally established synchronous spanning tree to realize time synchronization in the stacking system. The invention realizes the precise time synchronization of the stacking system without influencing the time synchronization of other network equipment.

Description

technical field [0001] The present invention relates to time synchronization technology, in particular to a time synchronization method of a stacking system, a stacking system and member devices. Background technique [0002] The IEEE1588 protocol is a relatively accurate clock synchronization solution in Ethernet, and its basic function is to keep other clocks in the distributed network synchronized with the most accurate clock. A precision time protocol (PTP, Precision Time Protocol) is defined in the IEEE1588 protocol, which is used to accurately synchronize the clocks of network nodes in standard Ethernet or other distributed bus systems using multicast technology, and its precision can reach nanometers. second level. [0003] In the network, the clock priority is usually set for each clock device, and each clock device sends an Announce message carrying its own clock priority in the network to elect the clock device with the highest clock priority, which has the highes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04L12/56H04J3/06
CPCH04J3/0641H04J3/0667
Inventor 缪琛徐鹏飞贺子奇
Owner NEW H3C TECH CO LTD
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