Message retransmitting method and apparatus

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...

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

Images