Message retransmitting method and apparatus

A packet forwarding and packet technology, applied in the field of communication, can solve the problems of network equipment paralysis, protocol interruption, forwarding traffic interruption, etc., and achieve the effect of enhancing the anti-attack capability.

Active Publication Date: 2010-11-03
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since the current packet processing capability of the forwarding plane is much greater than that of the control plane, if an attacker constructs a large number of packets to be sent to the CP to attack the router, and the EFU of the forwarding plane finds that the attack packets need to be sent, it will It will be placed in the FIFO, because the speed of the attack message will easily exceed the processing speed of the control plane, so that the FIFO will soon be back-pressed to the EFU, so that the subsequent messages that need to be sent will be blocked due to the back-pressure of the FIFO. thrown away
If there are always attack messages being sent, the FIFO will always be full. Even if the CP takes out the message from the FIFO, a new message will be put into the FIFO by the EFU immediately, which will cause the FIFO to always have a back pressure signal. , the normal sending protocol packets received by the EFU will be lost, resulting in the interruption of the protocol after a period of time, the interruption of forwarding traffic, and even the paralysis of network equipment

Method used

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  • Message retransmitting method and apparatus
  • Message retransmitting method and apparatus
  • Message retransmitting method and apparatus

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Embodiment Construction

[0022] The embodiment of the present invention provides a method and device for message forwarding. The embodiment of the present invention buffers the message when the channel sent to the control plane on the message is blocked, and then forwards the message when the channel is not blocked. The buffered packets are sent to the CP.

[0023] In order to express the purpose, technical solutions and advantages of the embodiments of the present invention more clearly, further detailed description will be made below in conjunction with the accompanying drawings and specific embodiments.

[0024] In the specific implementation of the embodiment of the present invention, a virtual queue can be created on the forwarding plane for sending messages, and the parameters of the virtual queue include at least a head pointer, a tail pointer, a size of the virtual queue and the number of cached messages in the virtual queue. When the channel of the message sent to the control plane is blocked...

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Abstract

A method for retransmitting message up-transmits buffer stored message to control plane when channels is not blocked by buffer storing message when channel used for up-transmitting message to control plane is blocked.

Description

technical field [0001] The invention relates to communication technology, in particular to a message forwarding method and device. Background technique [0002] In the router distributed forwarding architecture, it mainly includes a control plane (Control Plane; CP) and a forwarding plane. The control plane is mainly responsible for the management and monitoring of the entire router device, the collection of protocol packets reported by the forwarding plane, the calculation of routes, and the generation of forwarding table items and sending them to the forwarding plane; the forwarding plane is also called the service plane, mainly by searching the The forwarding entry forwards the data packet. It can be seen from this that the forwarding table entries required by the forwarding plane are generated and delivered by the control plane, and the control plane calculates routes and delivers forwarding table items depending on the timely and accurate uploading of received data pac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L47/20
Inventor 谢颂贤
Owner HUAWEI TECH CO LTD
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