Multiple slot switch

Abstract

The invention discloses a multiple slot switch used for increasing the actual available slot number of the switch in a same cabinet and reducing high speed signal attenuation simultaneously. The multiple slot switch comprises a backboard, at least a main control board and two switch subunits. Each switch subunit comprises a plurality of interface cards, at least a first order switch board and at least a second order switch board. The main control board is connected with each interface card, the first order switch board and the second order switch board of the two switch subunits respectively and is used for managing the interface cards, the first order switch board and the second order switch board. To any switch subunit, any first order switch board in the switch subunit is in quadrature connection with any interface card and any second order switch board in the present switch subunit through a first socket connector which is fixed on the backboard. Between the switch subunits, each first order switch board of the switch subunit is connected with each second order switch board in the other switch subunit.

Description

technical field [0001] The invention relates to the technical field of data communication, in particular to a multi-slot switch. Background technique [0002] The switches in the data center need to face the characteristics of high load, large bursts, and complex traffic models in the data center. In addition, they also need to face the increasingly strong trend of switching, storage, and computing. Therefore, the switches in the data center are generally Adopt strictly non-blocking CLOS switching architecture. [0003] The CLOS switching idea was proposed by Charles CLOS in his article "A Study of Nonblocking Switching Networks" in 1953, so it is named after it. The CLOS switching structure based on the CLOS switching idea is a multi-level multi-path structure, and the purpose is to reduce cross nodes while realizing non-blocking switching. At present, the most used is the 3-level CLOS switching structure, such as figure 1 As shown, it is a brief block diagram based on C...

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Problems solved by technology

[0006] In order to increase the slot positions of the switch, the prior art proposes a cluster technology, which integrates the two chassis through the cluster technology, and currently includes the following two solutions: 1) as Figure 5a As shown in the figure, the cluster management is realized through the interface cards, that is, the user ports of some of the interface cards are connected through external cables as dedicated cluster channels. The number of interconnected ports between each chassis is generally relatively small, so it is difficult to achieve wire-speed switching of all user ports across chassis, and the packet forwarding from the user port of one chassis to the user port of another chassis needs to pass through the cluster port, which increases the delay of message forwarding; 2) if Figure 5b As shown, the cluster management is implemented through the switch board: this method is mainly to lead out the interface on the switch board, and then use a cable to connect the switch board interfaces of the two chassis. This method has the following problems: when the system switching capacity is compared When it is large, in order to meet the wire-speed switching of all interface cards from one chassis to another chassis, then a lot of interconnection signals between switching boards will be required. At present, the highest rate of a single interface is generally 100Gbps, that is, there are 10 channels For 10.3125G differential signals, the width of one interface is about 24mm, so the 100G interfaces that can be accommodated in one switch board slot will not exceed 20, and are limited by the number of switch board slots, so the interconnection between two chassis Differential pairs cannot meet the needs of large-capacity systems

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