CN205283591U

CN205283591U - Improvement structure that rack -type switch is connected back -to -back

Info

Publication number: CN205283591U
Application number: CN201620017278.4U
Authority: CN
Inventors: 黄元波; 张伟
Original assignee: Fiberhome Telecommunication Technologies Co Ltd
Current assignee: Fiberhome Telecommunication Technologies Co Ltd
Priority date: 2016-01-08
Filing date: 2016-01-08
Publication date: 2016-06-01
Anticipated expiration: 2026-01-08

Abstract

The utility model discloses an improvement structure that rack -type switch is connected back -to -back, including first, the 2nd rack -type switch, a rack -type switch includes an input module and a m first middle module, and the 2nd rack -type switch includes output module and the middle module of a m second, first middle module includes module and the middle module of a m2 first order third level in the middle of the m2 second level, and the module includes module and the middle module of a m2 first order third level in the middle of the m2 second level in the middle of the second, in the middle of the second level in the rack -type switch in the middle of module and the first order third level module respectively with the 2nd rack -type switch in the first order third level in the middle of module and second level module cross connection. The utility model discloses the module is fallen the electricity or is broken down in the middle of one of them second level, and the module still can normally be worked in the middle of the first order third level of remote site, has increased link redundancy protection function, has realized the non -blocking switch between the rack -type switch.

Description

The modified node method that a kind of rack exchange board connects back-to-back

Technical field

The utility model relates to communication technical field, is specifically related to the modified node method that a kind of rack exchange board connects back-to-back.

Background technology

Rack exchange board can use usually 3 grades of CLOS networks (multistage switched network network) realize nonblocking switching; as shown in Figure 1, load module (IM), output module (OM) and intermediate module (CM) can be difference divided into again according to the position residing in CLOS network of switching matrix unit and function. IM, OM are the 1st grade and the 3rd grade of switching matrix unit of 3 grades of CLOS networks respectively, and CM is the middle switching matrix unit of 3 grades of CLOS networks. The feature of CLOS network is: as m >=2n-1, and what state is managed network be not in, and exports end points for arbitrary idle input stage input endpoint and output stage, always there is idle link and connect to get up by them, and namely strictly non-blocking exchanges; As m >=3/2n, network exists the possibility occurring to block, but the generation of obstruction can be avoided by non-blocking properity, and the connection set up need not be readjusted, i.e. broad sense nonblocking switching; As m >=n, if network blocks, readjust existing connection by non-blocking properity, thus find an idle link to set up connection between input stage input terminus and output stage output terminal, be i.e. rearrangeable clog-free CLOS network.

If for the feature of above-mentioned CLOS network it can be seen that the cross-capacity wanting expanding system must increase the quantity of intermediate module CM. Switch cluster can adopt the mode connected back-to-back to increase the quantity of CM usually. As shown in Figure 2, this kind mode of connection back-to-back needs to be configured to CM multistage switch mode, wherein CM13 is the 1st grade and the 3rd grade of intermediate module, CM2 is the 2nd grade of intermediate module, CM both can form 5 grades of CLOS exchange networks with CM13, CM2 jointly, again can directly and CM2 connect to form 3 grades of CLOS exchange networks, owing to this kind mode of connection structure back-to-back is simple and is easy to expansion, current Application comparison is extensive.

But, it being mode of connection direct-connected back-to-back between CM2 and CM13, do not utilize the redundancy protecting of connecting link, its operating mode is asymmetric, principal and subordinate's formula. The rack exchange board at CM13 place cannot be independent complete exchange, CM13 must be connected to CM2 form 5 grades of CLOS networks could realize exchange, therefore, when the machine frame at CM2 place falls electricity or fault occurs, the machine frame at the CM13 place of opposite end cannot realize exchanging function. Consequently, it is desirable to design a kind of new mode of connection so that rack exchanges function and independently works, and has certain link function of redundancy protection, also want between rack exchange board to realize clog-free exchange simultaneously.

Practical novel content

Technical problem to be solved in the utility model is that the traditional rack exchange board connected back-to-back can not the problem of independent operating.

In order to solve the problems of the technologies described above, the utility model provides the modified node method that a kind of rack exchange board connects back-to-back, comprise the first rack exchange board and the 2nd rack exchange board, first rack exchange board comprises n load module and m the first intermediate module, 2nd rack exchange board comprises n output module and m the 2nd intermediate module

M the first intermediate module comprises m/2 second stage intermediate module and m/2 the first step and third stage intermediate module, and individual 2nd intermediate module of m comprises m/2 second stage intermediate module and m/2 the first step and third stage intermediate module;

M/2 second stage intermediate module in first rack exchange board and m/2 the first step and third stage intermediate module respectively with m/2 the first step in the 2nd rack exchange board and third stage intermediate module and m/2 second stage intermediate module cross connection.

In technique scheme, when the value of m is odd number, m described first intermediate module comprises the described second stage, (m+1)/2 intermediate module and the described first step in (m-1)/2 and third stage intermediate module, and m described 2nd intermediate module comprises the described second stage, (m-1)/2 intermediate module and the described first step in (m+1)/2 and third stage intermediate module.

In technique scheme, during two or more rack exchange board cross connection, the value of m should meet: m=2Nr, and wherein, r is the number of rack exchange board, and N is natural number.

The utility model, by second stage intermediate module, the first step and third stage intermediate module equilibrium distribution are in two rack exchange boardes, change the direct-connected mode of connection between two rack exchange boardes into cross connection simultaneously, i.e. second stage intermediate module in each rack exchange board, in the middle of the first step and the third stage masterplate respectively with the first step in other rack exchange board and third stage intermediate module, the cross connection respectively of second stage intermediate module, like this after one of them second stage intermediate module falls electricity or fault occurs, the first step of opposite end and third stage intermediate module still maintain with other second stage intermediate module and are connected, ensure the first step and third stage intermediate module normal operation, too increase the function of redundancy protection of link simultaneously, achieve the nonblocking switching between rack exchange board.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of 3 grades of CLOS networks provided by the invention;

Fig. 2 is the direct-connected back-to-back schematic diagram of switch cluster provided by the invention;

Fig. 3 is the schematic diagram of intermediate module equilibrium distribution provided by the invention;

Fig. 4 is the schematic diagram of switch cluster provided by the invention cross connection back-to-back.

Embodiment

Below in conjunction with Figure of description, the utility model is described in detail.

The utility model provides the modified node method that a kind of rack exchange board connects back-to-back, as shown in Figure 3 and Figure 4, comprise the first rack exchange board and the 2nd rack exchange board, first rack exchange board comprises n load module (IM) and m the first intermediate module, and the 2nd rack exchange board comprises n output module (OM) and m the 2nd intermediate module.

By second stage intermediate module (CM2), the first step and third stage intermediate module (CM13) equilibrium distribution in the first rack exchange board and the 2nd rack exchange board, namely the m in the first rack exchange board the first intermediate module comprises m/2 (m is even number) individual CM2 and m/2 CM13, and the m in the 2nd rack exchange board the 2nd intermediate module comprises m/2 CM2 and m/2 CM13.

When the value of m is odd number, m the first intermediate module comprises (m+1)/2 CM2 and comprises (m-1)/2 CM2 and (m+1)/2 CM13 with (m-1)/2 CM13, m the 2nd intermediate module.

Change the direct-connected mode of connection of the first rack exchange board and the 2nd rack exchange board into cross connection, by m/2 CM2 and m/2 CM13 in the first rack exchange board respectively with m/2 CM13 and m/2 CM2 cross connection in the 2nd rack exchange board.

It should be noted that; CM2 in each rack exchange board must only be connected with each CM13 in other rack exchange board; CM13 in each rack exchange board must only be connected with each CM2 in other rack exchange board; like this after one of them CM2 falls electricity or fault occurs; the CM13 of opposite end still keeps being connected with other CM2; ensure CM13 normal operation; too increase the function of redundancy protection of link, it is achieved that the nonblocking switching between rack exchange board simultaneously.

When two or more rack exchange board is connected, in order to the redundancy ensureing the first intermediate module and the 2nd intermediate module, the cross connection that realizes between rack exchange board, the value of usual m needs to meet: m=2Nr, wherein, r is the number of rack exchange board, and N is natural number.

The utility model, by second stage intermediate module (CM2), the first step and third stage intermediate module (CM13) equilibrium distribution are in two rack exchange boardes, change the direct-connected mode of connection between two rack exchange boardes into cross connection simultaneously, i.e. second stage intermediate module (CM2) in each rack exchange board, in the middle of the first step and the third stage masterplate (CM13) respectively with the first step in other rack exchange board and third stage intermediate module (CM13), second stage intermediate module (CM2) cross connection respectively, like this after one of them second stage intermediate module (CM2) falls electricity or fault occurs, the first step of opposite end and third stage intermediate module (CM13) still maintain with other second stage intermediate module (CM2) and are connected, ensure the first step and third stage intermediate module (CM13) normal operation, too increase the function of redundancy protection of link simultaneously, achieve the nonblocking switching between rack exchange board.

The utility model is not limited to above-mentioned preferred forms, and anyone should learn the structure change made under enlightenment of the present utility model, and every have identical or close technical scheme with the utility model, all falls within protection domain of the present utility model.

Claims

1. the modified node method that a rack exchange board connects back-to-back, comprise the first rack exchange board and the 2nd rack exchange board, first rack exchange board comprises n load module and m the first intermediate module, 2nd rack exchange board comprises n output module and m the 2nd intermediate module, it is characterized in that

2. the modified node method that a kind of rack exchange board as claimed in claim 1 connects back-to-back, it is characterized in that, when the value of m is odd number, m described first intermediate module comprises the described second stage, (m+1)/2 intermediate module and the described first step in (m-1)/2 and third stage intermediate module, and m described 2nd intermediate module comprises the described second stage, (m-1)/2 intermediate module and the described first step in (m+1)/2 and third stage intermediate module.

3. the modified node method that a kind of rack exchange board as claimed in claim 1 connects back-to-back, it is characterised in that, during two or more rack exchange board cross connection, the value of m should meet: m=2Nr, and wherein, r is the number of rack exchange board, and N is natural number.