Time synchronization method, relay equipment and device
A relay device and time synchronization technology, applied in the field of communications, can solve the problems of inability to synchronize time, affecting the performance of NTP clients, and reducing the reliability of time synchronization services.
Active Publication Date: 2019-12-20
RAISECOM TECH
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Problems solved by technology
[0003] When the NTP server fails or the link between the NTP server and the relay device fails, the NTP synchronization between the NTP client and the NTP server will time out and the time cannot be synchronized.
For a device that synchronizes periodically, it may be a synchronization failure, but for a device that restarts and does not have a real-time timer (Real Time Clock, RTC) mechanism, the time synchronization service is unavailable
[0004] When the NTP server fails or the link between the NTP server and the relay device fails, and the time synchronization service is unavailable, the NTP client needs to wait for the NTP server to recover or the link between the NTP server and the relay device to fail After recovery, the time synchronization session can be performed to complete the time synchronization of the NTP client; however, during the fault period, the NTP client that restarts and does not have an RTC mechanism cannot perform time synchronization, which affects the performance of the NTP client and reduces Reliability of time synchronization service
Method used
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[0101] It should be noted that "first", "second", "third", and "fourth" in the embodiments of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.
[0102] The specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementations described here are only used to illustrate and explain the present application, and are not intended to limit the present application.
[0103] When the NTP server fails or the link between the NTP server and the relay device fails, the NTP client needs to wait for the NTP server to recover or the link between the NTP server and the relay device to recover before performing time synchronization. session, to complete time synchronization; during the fault period, for NTP clients that restart and do not have an RTC mechanism, the time synchroniza...
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The invention discloses a time synchronization method, relay equipment and a time synchronization device. The method comprises the following steps: the relay equipment establishes connection with at least two NTP servers, wherein the at least two NTP servers comprise a first NTP server, and after the relay device detects that the first NTP server is in a fault state and at least one NTP server inthe at least two NTP servers is in a normal state, the working mode of the relay device is switched from an unvarnished transmission mode to a forwarding mode; the relay device in the forwarding modereceives a first time synchronization request message sent to the first NTP server by the first NTP client, and a first target NTP server is determined according to locally stored average round-trip time delay related to the first NTP server, the first time synchronization request message is sent to the first target NTP server, and a received first time synchronization response sent by the first target NTP server is sent to the first NTP client.
Description
technical field [0001] The present application relates to the technical field of communication, and in particular to a time synchronization method, relay equipment and device. Background technique [0002] The Network Time Protocol (Network Time Protocol, NTP) is a time synchronization service protocol, and its purpose is to provide a unified time synchronization service for devices running on the network. When the NTP server is in a normal state, the NTP client and the NTP server perform normal NTP message exchange, and the relay device is transparent to the above two types of devices, that is, the NTP client device and the NTP server device are not aware If there is a relay device, the mode of the relay device is transparent transmission mode. [0003] When the NTP server fails or the link between the NTP server and the relay device fails, the NTP synchronization between the NTP client and the NTP server will time out and the time cannot be synchronized. For a device tha...
Claims
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IPC IPC(8): H04J3/06H04L29/08
CPCH04J3/0658H04J3/0667H04L67/14
Inventor 王芳
Owner RAISECOM TECH