Internet exchange system able to smart realize CPU data transmission and method for realizing the same
A technology of data transmission and network exchange, applied in the direction of digital transmission system, transmission system, data exchange network, etc., can solve the problems of limited PCI bus bandwidth, limited data transmission capacity of system CPU and special chip, and limited data transmission capacity, etc. The effect of improving efficiency
Active Publication Date: 2007-05-09
SUZHOU CENTEC COMM CO LTD
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Problems solved by technology
But for a CPU, the transmission capability of the PCI bus it can support is limited, and this transmission method actually limits the data transmission capability between the system CPU and the dedicated chip.
[0003] Moreover, the PCI bus itself also has the problem of limited bandwidth, and many components in the system are using the PCI bus to communicate with the system CPU, forcing the dedicated chip to compete with other components to use the PCI bus, which also limits the system CPU. Data transmission capability with dedicated chip
[0004] Therefore, although both the dedicated chip and the system CPU have faster data processing capabilities and transmission capabilities, at present, the method of transmitting data between the system CPU and the dedicated chip through the PCI bus used by most systems limits the communication between the two. data transfer capability, and this approach is also very inflexible
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[0038] Referring to FIG. 1 , it is a schematic diagram of a system according to Embodiment 1 of the present invention. In this embodiment, a plurality of system CPUs 1 are connected to a switch chip 2 , and the switch chip 2 is connected to a plurality of dedicated chips 3 . The dedicated chip 3 includes a data processing unit 31 , multiple CPU transmission queues 32 and a transmission processing unit 33 . Wherein, the transmission processing unit 33 is used to read out the data to be transmitted in each CPU transmission queue 32 inside the dedicated chip 3, and add the MAC address of the system CPU1 attached to the corresponding CPU transmission queue 32 to these In the destination address field of the data packet, a new data packet is formed. The new data packet processed by the transmission processing unit 33 is transmitted to the corresponding system CPU1 through the switch chip 2 . At the same time, the above-mentioned transmission processing unit 33 also removes the MA...
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A network change-over system used for realizing CPU data transmission is prepared as arranging a transmission-process unit in special chip, connecting system CPU with special chip through change-over chip and using connected CPU and chip to transmit data, reading out data packet from CPU transmission queue by transmission-process unit and transmitting said data packet to system CPU after data packet is added with MAC address for making system CPU and special chip be able to transmit data to each other directly without PCI bus. Its data transmitting method is also disclosed.
Description
technical field [0001] The content of the present invention relates to a network switching system, especially the flexible implementation of the system CPU in the network switching system and the dedicated chip (ASIC, Application Special Integrated Circuit, Application Special Integrated Circuit, or called a special purpose chip in the network switching system, in the present invention The network switching system and method for data transmission between collectively referred to as "special-purpose chip" in . Background technique [0002] Usually, in a network switching system, such as an Ethernet switching system, there is a system CPU and several dedicated chips. Generally speaking, the data packet (Packet) transmission between the dedicated chip and the system CPU is accomplished through a CPU bus, such as a PCI bus. But for a CPU, the transmission capacity of the PCI bus it can support is limited, and such a transmission mode actually limits the data transmission capaci...
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IPC IPC(8): G06F13/00H04L12/56H04L12/70
Inventor 孙剑勇熊波郑晓阳古陶
Owner SUZHOU CENTEC COMM CO LTD