CN1540933A - Service board interface and method for interconnecting with dual Gigabit Ethernet switching planes - Google Patents

Abstract

The invention discloses a service board interface and a method for interconnecting with dual Gigabit Ethernet switching planes, wherein the method is: respectively connecting two ports on a service board with the Gigabit Ethernet interfaces of two switching boards; The port on the service board connected to the main switching board is electrically connected to a Gigabit Ethernet interface on the service board. The service board interface includes a Gigabit Ethernet interface, a selection switch and at least two ports, the ports are used to connect at least two switch boards respectively, and the selection switch is connected to the Gigabit Ethernet interface and the at least two ports, and is used to select at least two One of the ports is in electrical communication with the Gigabit Ethernet interface.

Description

Service board interface and method for interconnecting with dual Gigabit Ethernet switching planes

technical field

The invention relates to an Ethernet interface technology, in particular to a service board interface and a method for interconnecting a single Gigabit Ethernet interface and a double Gigabit Ethernet switching plane.

Background technique

Usually, in a high-reliability system, the main nodes of the system cannot have a single point of failure. The basic hardware composition of a high-reliability system usually includes two switching boards and multiple service boards. The switching board mainly provides data link switching, and the two switching boards serve as mutual backups to form two switching planes. If the data link in the switching plane is a Giga-bits Ethernet (GE) link, it is called the GE switching plane. Such a system can achieve high reliability, and the entire system will not be paralyzed due to a failure of the switching board. Figure 1 is a model of a dual GE switching plane system. Two switching boards and their data links form a dual GE switching plane. The service boards can be various, and mainly handle various services and perform various functions.

The existing technical solution is shown in Fig. 2, and its principle is mainly that the service board uses two GE interfaces to respectively connect two Gigabit Ethernet switching planes. The two switching boards in the system implement the main and backup work. In this way, when the switch board 1 is the master, the switch plane 1 works, and all service boards are connected to the switch plane 1 through the Gigabit Ethernet interface GE1, and the data exchange between the service boards is realized through the switch plane 1. When the switching board 2 is the master, the Gigabit Ethernet switching plane 2 works, and all service boards are connected to the switching plane 2 through the Gigabit Ethernet interface GE2, and data exchange between service boards is realized through the switching plane 2.

The main feature of this solution is that each service board provides two Gigabit Ethernet interfaces, which are respectively connected to two switching planes. But there are the following disadvantages:

(1) The implementation cost is high. Since each service board has to provide two Gigabit Ethernet interfaces, the cost is increased.

(2) The design is difficult. The service board provides two Gigabit Ethernet interfaces, occupying more wiring space on the printed circuit board of the single board.

Contents of the invention

The purpose of the present invention is to provide a service board interface and a method for interconnecting with dual Gigabit Ethernet switching planes, so as to reduce costs and further save single-board PCB wiring space.

Technical scheme of the present invention:

A method for interconnecting a single Gigabit Ethernet interface with a dual Gigabit Ethernet switching plane, the method comprising steps:

Connect the two ports on one service board to the Gigabit Ethernet interfaces of the two switching boards respectively; and

Select the port on the service board connected to the main switch board to be electrically connected to a Gigabit Ethernet interface on the service board.

in:

When the two switching boards are switched between active and standby, another port on the service board is automatically selected to be electrically connected to a Gigabit Ethernet interface on the service board.

A service board interface, comprising a Gigabit Ethernet interface, is characterized in that it also includes:

At least two ports for respectively connecting at least two switching boards;

A selector switch is connected to the Gigabit Ethernet interface and the at least two ports, and is used to select one of the at least two ports to be electrically connected to the Gigabit Ethernet interface.

Wherein: the selection switch is a Gigabit Ethernet multiplexing switch or a Gigabit Ethernet switching network chip.

The present invention reduces two Gigabit Ethernet interfaces required by one service board to one by multiplexing the Gigabit Ethernet interfaces, thereby reducing system cost. As the number of service boards in the system increases, the system saves more costs. At the same time, the occupation of the wiring space of the service board is also reduced.

Description of drawings

Fig. 1 is the dual Gigabit Ethernet switching plane model of prior art;

Fig. 2 is the logical block diagram of Fig. 1;

Fig. 3 is a logical block diagram of the present invention;

Fig. 4 is a schematic structural diagram of a service board interface in Fig. 3;

FIG. 5 is another structural schematic diagram of the interface of the service board in FIG. 3 .

Detailed ways

Referring to FIG. 3 , switch board 1 and switch board 2 both have Gigabit Ethernet interfaces GE1, GE2...Gen, and each service board is connected to switch board 1 and switch board 2 respectively. Each service board provides only one physical Gigabit Ethernet (referred to as GE) interface, and a GE interface multiplexing switch is added on the service board to multiplex one physical GE interface into two GE interfaces. The multiplexed two GE interfaces are respectively connected to two switching planes. When switching board 1 is the master, GE switching plane 1 works. At this time, the multiplexing switches of all service boards connect the GE interfaces of the service boards to GE switching plane 1, and exchange data through switching plane 1. When the switching board 2 is the master, the GE switching plane 2 works. At this time, the multiplexing switches of all service boards connect the GE interfaces of the service boards to the GE switching plane 2, and data exchange is realized through the switching plane 2. Through the multiplexing of GE interfaces, one GE interface on the service board is connected to two switching planes.

Referring to FIG. 4 , the interface of the service board includes port 1 and port 2. The Gigabit Ethernet interface is connected to port 1 and port 2 through a Gigabit Ethernet multiplexing switch. The Gigabit Ethernet multiplexing switch has a control terminal. When the control terminal is logic "0", the GE multiplexing switch connects port 0 to port 1. When the control terminal is logic "1", the GE multiplexing switch connects port 0 to port 2. Port 0 is connected to the GE interface. In this way, by controlling the logic at the control end of the multiplexing switch, the service board multiplexes one physical GE interface into two GE interfaces. The control terminal of the multiplexing switch is controlled according to the active and standby states of the two switching boards. The two switching boards respectively output a master-standby status signal to connect with the service board, and the service board controls the control terminal of the multiplexing switch according to the logic of the two master-standby status signals.

Referring to Figure 5, the GE switching network chip is used in the service board to replace the Gigabit Ethernet multiplexing switch, and the GE switching network chip selects the corresponding port to electrically connect with the Gigabit Ethernet interface according to which of the external switching boards is the main board , it is also possible to connect one GE interface of the service board to two GE switching planes. The control of the switching network chip is realized by the processor through software. After the processor on the service board knows the master/standby state of the switch board, it controls the switch network chip on the service board through software, so that the switch network chip selects a corresponding port and electrically connects to the Gigabit Ethernet interface.

Claims (5)

1, the method for a kind of single gigabit ethernet interface and dual gigabit ethernet exchange plane interconnection is characterized in that comprising step:

Two ports on one business board are connected with the gigabit ethernet interface of two power boards respectively; And

Selecting to connect on the business board port of main power board is electrically connected with a gigabit ethernet interface on this business board.

2, the method for claim 1 is characterized in that, when two power boards carry out active and standby switching, selects another port on the business board to be electrically connected with a gigabit ethernet interface on this business board automatically.

3, method as claimed in claim 1 or 2 is characterized in that, by a gigabit Ethernet multiplex switch or gigabit Ethernet switching network chip the port on the business board is selected.

4, a kind of business board interface comprises a gigabit ethernet interface, it is characterized in that also comprising:

At least two ports are used for connecting respectively at least two power boards;

Selector switch is connected with described two-port at least with gigabit ethernet interface, is used for selecting and gigabit ethernet interface electric connection of at least two ports.

5, method as claimed in claim 4 is characterized in that, selector switch is gigabit Ethernet multiplex switch or gigabit Ethernet switching network chip.

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