Information transmission method and device

Abstract

The invention discloses an information transmission method. The information transmission method includes the steps that a distributed system further comprises a UART channel gating unit which is connected with a master control unit and a forwarding engine unit through a UART port; a UART channel is established between the master control unit and the forwarding engine unit through the UART channel gating unit and used as a backup of an IPC channel; under the condition that an IPC is interrupted, key information transmission between the master control unit and the forwarding engine unit is guaranteed. Based on the same inventive concept, the invention further provides a device. When heartbeats of the forwarding engine unit are abnormal, the master control unit can interfere with the forwarding engine unit, and the forwarding engine unit can rapidly restore.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an information transmission method and device. Background technique [0002] A distributed system includes a main control unit and multiple forwarding engine units. see figure 1 , figure 1 It is a schematic diagram of a distributed system in an existing implementation. figure 1 In , take one main control unit and three forwarding engine units as an example. The control channel and the data channel are separated, and the control information interaction between the main control unit and the forwarding engine unit is realized through the inter-process communication (Inter-process Communication, IPC) switching unit; the main control unit and the forwarding engine are realized through the inter-board data channel switching unit Interaction of message data between units. [0003] The main control unit is responsible for the overall management of the system, calculat...

AI Technical Summary

Problems solved by technology

[0007] When the forwarding engine unit is not working properly, the normal transmission of IPC packets cannot be guaranteed

For example, the forwarding engine unit has been unable to allocate buffers for IPC packets, or the forwarding engine unit has been unable to ensure that the task or process responsible for IPC packet processing is normally scheduled due to excessive pressure.

At this time, the main control unit has been unable to obtain the information of the corresponding forwarding engine unit

For the main control unit, the forwarding engine unit becomes a black box, and the main control unit can only reset the forwarding engine unit through a hardware signal, causing the forwarding engine unit to experience a long-term interruption of forwarding services

Moreover, because the IPC has been interrupted, the main control unit cannot obtain and diagnose the cause of the abnormal operation of the forwarding engine unit, resulting in the failure to guarantee the robustness and maintainability of the entire distributed system

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