Scheme with external channels

Abstract

This invention provides a out-of-band channel scheme, belongs to computer network communication field. This scheme connects the master control board with service board by Ethernet way through two layer switching chip on the physical layer, divides the data exchanged between the master control board and service board into the control information and service relevant data, packages the service relevant data as the Ethernet frame format. Appoints the source MAC for destination board MAC address that will send out, through the Ethernet service relevant data channel sends it to destination board, packages the above statement control information into the frame format of control information, sends the destination MAC to the destination board MAC address that will send out, send it to sending queue, through Ethernet control information channel sends it to the destination board. Adopting this scheme can ensure the exchanging information between the master control board and service board of the distribution route switcher, isní»t affected by service data transmit traffic, can ensure the important control information will be not lost.

Description

Technical field [0001] The invention belongs to a high-performance distributed exchange router system in a communication network, and in particular relates to a method for communicating between a main control board and a service board of a distributed exchange router through the Ethernet. Background technique [0002] The design of high-performance distributed switching routers generally adopts hardware-based distributed routing and switching technology, and its routing and switching processing is mainly distributed to the ASIC forwarding chips of each service board to complete, and the switching backplane uses advanced CROSSBAR technology to ensure The entire system completes the line-speed forwarding of L2-L7 layers with high performance. In terms of function, the high-performance distributed switching router module can be divided into a main control board and a service board. The main control board is the control center of the router, and the CPU and memory are located in...

AI Technical Summary

Problems solved by technology

At present, we call the channel for exchanging business data between the ASIC forwarding chips of each service board (using CROSSBAR technology) as an in-band channel. Service data can be exchanged without the CPU of the main control board or the CPU of the service board. The setting of the chip and CROSSBAR can make the business data be completely forwarded by the hardware without the intervention of the CPU, thereby speeding up the speed of business data forwarding. The information between the main control board and the service board CPU can also be transmitted through the in-band channel. Realize information exchange between the CPU of the main control board and the CPU of the service board, because both the CPU of the main control board and the CPU of the interface board can access the CROSSBAR and communicate through the CROSSBAR. The information exchange between board CPUs overlaps on the physical link, that is, it must be completed through CROSSBAR, and the bandwidth of CROSSBAR is limited. If the amount of business data is large, it may cause the main control board to The information exchanged between the CPU and the service board CPU is lost, and some of these information, such as routing delivery information, are very important. If these information are lost, the distributed switching router will not work properly.

Therefore, it is difficult to ensure that important data is not lost by using in-band channels to transmit all data

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