Cell processing method and device for switching network chip

Abstract

A cell processing method and device for a Switch Fabric (SF) chip are disclosed, which belong to the field of communications. The SF chip includes a unicast route table, which is multiplexed in two working modes and is looked up according to a unicast cell, and a multicast route table, which is multiplexed in the two working modes and is looked up according to a multicast cell. The cell processing method for an SF chip includes: the SF chip receives a cell and an input link number corresponding to the cell from an upstream apparatus and extracts a destination Identifier (ID) of the cell; the SF chip looks up a route table according to a working mode of the SF chip, the destination ID and the input link number to determine a first bitmap corresponding to the cell; and the SF chip performs load balancing on the first bitmap to obtain a second bitmap and outputs the cell to a downstream apparatus according to the second bitmap. With the technical solutions of the disclosure, the SF chip in a cascade switching system can adapt to different working modes.

Description

technical field [0001] The invention relates to the communication field, in particular to a cell processing method and device of a switching network chip. Background technique [0002] At present, the switching capacity of more than T bits in the core switching network often uses multi-level interconnection cluster technology to achieve high-performance routing. This high-performance router is mainly used in the backbone network to provide good QoS performance. Its typical structure Such as figure 1 shown. It can be seen that in the two-level interconnected switching network, the switching fabric chip (SF) is in two working modes. [0003] In the first working mode, the SF exists on a cascadable rack, and is connected to a switching access chip (switch access, SA) and a lower-level switching network chip (SF). The working mode is logically divided into two parts: the first part obtains cell switching from the switching access chip (SA) to the next-level switching network ...

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Problems solved by technology

[0005] In the two working modes, SF processes cells differently. In order to make SF suitable for different working modes, it is necessary to set up a set of processing circuits independently for each working mode of SF, but this will affect the scale and power consumption of the chip. , and have an impact on the reliability of the chip

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