CN101094238A - Cluster system with multiple machine frames, and machine frame - Google Patents

Abstract

The present invention relates to the technical field of network communication, and discloses a multi-chassis cluster system, a chassis, and a method for sending messages in the multi-chassis cluster system, wherein the multi-chassis cluster system includes at least three chassis, and the multi-chassis cluster system includes at least three chassis. The chassis is used to provide at least two interfaces, and to interconnect with the two chassis through the interfaces respectively to form a closed loop. The invention can simplify the connection of control channels inside multiple machine frames, and can also improve the reliability of data transmission.

Description

Multi-chassis cluster system and chassis

technical field

The invention relates to the technical field of network communication, in particular to a multi-frame cluster system, a frame, and a method for sending messages in the multi-frame cluster system.

Background technique

As the communication network puts forward higher and higher requirements for the interface capacity and switching capacity of the equipment, the single-chassis system has been difficult to meet the growing demand. It has become a trend to increase the equipment system capacity by cascading two or more chassis. Multi-chassis cascading refers to the use of cascading technology to interconnect the original single-chassis devices to form a new multi-chassis device to expand the switching capacity and interface capacity.

In a multi-chassis cascaded system, it is necessary to provide control channels and service channels between the chassis. Among them, the control channel mainly completes the communication between the chassis, realizes the transmission of control messages between the Functions such as status monitoring of the slave chassis. A service channel is a channel for forwarding and exchanging service packets.

The prior art proposes a fully interconnected structure based on a multi-chassis cluster system. In the prior art, each node has a connection with other nodes, and the connection may be an Ethernet connection or other physical implementations. In this connection, data from one node to another can be delivered directly.

In the process of realizing the present invention, the inventor found that at least the following problems existed in the prior art:

1. Due to the fully interconnected structure, each node is connected to other nodes, which makes the connection between nodes extremely complicated, which makes the control channel connection inside the multi-chassis cluster system very complicated. At the same time, due to the connection of each control channel The probability of failure is the same, so the complex control channel also reduces the reliability of system data transmission.

2. Since each node is connected to other nodes, each node needs to provide more interconnection ports, which leads to higher design cost.

Contents of the invention

The technical problem to be solved by the embodiment of the present invention is to provide a multi-chassis cluster system, and the device makes the connection of the control channels inside the multiple chassis simple.

The technical problem to be solved by the embodiments of the present invention is to provide a machine frame, which can be connected to two machine frames respectively through interfaces provided by itself to form a closed loop.

The technical problem to be solved by the embodiments of the present invention is to provide a method for sending messages in a multi-chassis cluster system, which can improve the reliability of data transmission between chassis on the ring network.

In order to solve the above technical problems, an embodiment of the present invention provides a multi-chassis cluster system, the multi-chassis cluster system includes at least three chassis, the chassis are used to provide at least two interfaces, and through the The interfaces are respectively interconnected with the two chassis to form a closed loop.

An embodiment of the present invention provides a machine frame, and the machine frame includes:

At least two interfaces, the interfaces are respectively used to connect the first frame and the second frame;

The protocol data processing unit is used to send the data received by the interface to the first chassis and the second chassis according to the ring network protocol.

An embodiment of the present invention provides a method for sending messages in a multi-chassis cluster system, wherein the system includes at least three chassis, and each chassis communicates with two chassis through interfaces provided by itself. connected to form a closed loop, the method comprising:

Determine the active control channel and backup control channel between the first chassis and the second chassis;

The first subrack sends a data packet to the second subrack through the active control channel according to the ring network protocol.

The above solution has the following advantages: Since the chassis of the embodiment of the present invention is interconnected with two chassis through the interfaces provided by itself to form a closed loop, compared with the prior art, each single node is connected to other single nodes , the embodiment of the present invention avoids the complex connection relationship between multiple chassis, thereby simplifying the connection of control channels inside the multiple chassis.

Since the embodiment of the present invention first interconnects multiple chassis to form a closed loop, when transmitting data packets, the chassis selects a control channel according to the ring network protocol to transmit the data packet to any other chassis. In the normal state, the standby control channel is closed, and the data message is transmitted through the main control channel. When the main control channel fails, the standby control channel is opened, and the data message is transmitted through the control channel. It does not affect the business, thereby realizing the protection function of the ring network and improving the communication reliability of each chassis on the ring network.

Description of drawings

FIG. 1 is a schematic diagram of a multi-chassis cluster system according to Embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of a multi-chassis cluster system according to Embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of a multi-chassis cluster system according to Embodiment 2 of the present invention;

FIG. 4 is a schematic diagram of a multi-chassis cluster system according to Embodiment 3 of the present invention;

FIG. 5 is a schematic diagram of a machine frame according to Embodiment 4 of the present invention;

Fig. 6 is a schematic diagram of a machine frame according to Embodiment 5 of the present invention.

Detailed ways

The embodiment of the present invention provides a multi-chassis cluster system, a chassis, and a method for sending messages in a multi-chassis cluster system. In order to enable those skilled in the art to better understand the embodiment of the present invention, the following describes the present invention in conjunction with the accompanying drawings The technical solutions of the embodiments are described.

Embodiment 1. A multi-chassis cluster system. This embodiment describes the situation of performing single-ring networking on multiple chassis. As shown in FIG. 1 , the multi-chassis cluster system includes at least three chassis frame, and the frame provides two interfaces. Wherein, the interface may be an Ethernet interface, an X.25 interface or any other physical interface.

The machine frame is interconnected with two adjacent machine frames respectively through the interfaces provided by itself to form a single closed loop, thereby obtaining a closed-loop network.

The frame transmits the data message to any other frame through a ring network protocol such as a resilient packet ring (RPR, Resilient Packet Ring) or a rapid ring protection protocol (RRPP, Rapid Ring Protection Protocol).

The following uses the RRPP protocol running scenario as an example to describe in detail how a subrack transmits data packets to any other subrack. As shown in Figure 2, assume that data exchange is required between subrack A and Chassis D has two control channels for inter-chassis communication. One of the control channels is the path between chassis A-chassis B-chassis C-chassis D. The control channel is represented by a solid line. This control channel is called the main control channel; the other control channel is the path between the slave frame A-frame F-frame E- The channel is called an alternate control channel.

In the RRPP protocol, only one control channel is opened at a time, and the other control channel is closed and is in a backup state. Under normal conditions, data packets from shelf A to shelf D will be transmitted along the active control channel, and the standby control channel is closed at this time.

If a shelf on the active control channel fails, the RRPP protocol will open the control channel indicated by the dotted line, so that the data packets from shelf A to shelf D are transmitted through the path of the dotted line, thus realizing ring network Protective function.

Embodiment 2. A multi-chassis cluster system. This embodiment describes the situation of performing single-ring networking on multiple chassis. As shown in FIG. 3 , the multi-chassis cluster system includes at least three chassis frame, and the frame provides four interfaces. Wherein, the interface may be an Ethernet interface, an X.25 interface or any other physical interface.

The machine frame is respectively interconnected with two adjacent machine frames through two interfaces provided by itself to form a closed loop.

The machine frame is then interconnected with two adjacent machine frames respectively through the other two interfaces provided by itself to form a closed loop, thereby obtaining a closed-loop network including two closed loops. Wherein, FIG. 3 represents the two closed loops with a dotted line and a solid line, respectively.

The frame transmits the data message to any other frame through a ring network protocol such as RPR or RRPP.

Compared with Embodiment 1, this embodiment forms two closed loops among multiple chassis. When a certain chassis exchanges data with any other chassis, there are four control channels for transmitting data packets. , while in Embodiment 1 a closed loop is formed between multiple chassis, and only two control channels are used to transmit data packets when exchanging data between chassis.

In addition, since this embodiment has two closed loops, when one closed loop fails, the other closed loop can be used for data transmission, thereby further improving the reliability of data transmission. Usually, the closed loop used in the normal state is called the active closed loop, and the other closed loops are called the standby closed loop. Since Embodiment 1 has a closed loop, when the closed loop fails, data packets cannot be transmitted.

Embodiment 3. A multi-chassis cluster system. As shown in FIG. 4 , the multi-chassis cluster system includes seven chassis, wherein two chassis provide three interfaces, and the remaining chassis provide two interfaces.

The chassis is interconnected with other chassis through the interfaces provided by itself to form three closed loops, which are: chassis 1 - chassis 2 - chassis 3 - chassis 4 - chassis 5 - chassis 1 The closed loop formed between chassis 1-chassis 7-chassis 6-chassis 4-chassis 5-chassis 1; and the closed loop formed between chassis 1-chassis 2-chassis 3- A closed loop formed between chassis 4-chassis 6-chassis 7-chassis 1.

As can be seen from the above three embodiments, since the frame of the embodiment of the present invention transmits the data message to any other frame through the ring network protocol, the ring network protocol closes the backup control channel under normal conditions, and passes the active control channel To transmit data packets, when the main control channel fails, open the backup control channel and transmit data packets through this control channel, so that the business will not be affected when a single chassis fails, thereby realizing the protection function of the ring network, and at the same time It also improves the communication reliability of each chassis on the ring network.

In addition, since each chassis is only connected to adjacent chassis, the interconnection topology between the chassis is simple, easy to install and maintain, and can also reduce design costs.

Finally, because the embodiment of the present invention can also implement a multi-ring network design, when a closed-loop fails, data transmission can be performed through other closed loops, thereby further improving the reliability of communication between chassis on the ring network.

Embodiment 4. A machine frame, as shown in FIG. 5 , the machine frame includes:

At least two interfaces, the interfaces are respectively used to connect the first chassis and the second chassis, and the two interfaces are generally referred to as the first interface and the second interface respectively.

The protocol data processing unit is configured to send the data received by the interface to the first frame and the second frame according to the ring network protocol, so that data interaction between the first frame and the second frame can be performed.

Embodiment 5, a machine frame, as shown in Figure 6, the machine frame includes four interfaces, which are respectively the first interface, the second interface, the third interface and the fourth interface; then on the basis of the fourth embodiment The subrack may also be connected to the first subrack through the third interface, and connected to the second subrack through the fourth interface, so that the first subrack and the second subrack can perform data interaction. It can be seen that the first chassis and the second chassis can actually realize data interaction through two channels.

It should be noted that, the chassis described in Embodiment 4 and Embodiment 5 above are configured with interfaces in pairs. In addition, the chassis provided in the embodiment of the present invention may also be configured without interfaces in pairs.

The following is an example where the frame has three interfaces, the three interfaces can be connected to the three frames respectively, and then the data interaction between the three frames can be realized through the protocol data processing unit; in addition, the three interfaces The chassis can be connected to two chassis respectively, and then the data interaction between the two chassis can be realized through the protocol data processing unit.

As can be seen from the above, since the shelf in the embodiment of the present invention can provide at least two interfaces, when multiple shelves are interconnected, the shelf can be interconnected with the two shelves through the interfaces provided by itself to form a closed interface. Compared with the prior art where each shelf is connected to other shelves, the embodiment of the present invention avoids complex connection relationships between multiple shelves, thereby simplifying the connection of control channels inside multiple shelves.

Embodiment 6. A method for sending messages in a multi-chassis cluster system, wherein the system includes at least three chassis, and the chassis are interconnected with two chassis through interfaces provided by themselves to form closing the loop, the method comprising:

Determine the active control channel and backup control channel between the first chassis and the second chassis;

Under normal conditions, the first machine frame sends data packets to the second machine frame through the active control channel according to the ring network protocol; when the active control channel fails, the standby control channel is opened, and the first machine frame The frame sends a data packet to the second frame through the backup control channel according to the ring network protocol. Wherein, the ring network protocol may be RPR or RRPP protocol.

As can be seen from the above, since the embodiments of the present invention first interconnect multiple chassis to form a closed loop, when transmitting data packets, the chassis selects a control channel according to the ring network protocol to transmit the data packets to any other chassis, so The above-mentioned ring network protocol closes the backup control channel under normal conditions, and transmits data messages through the main control channel. Even if a subrack fails, services will not be affected, thereby realizing the protection function of the ring network and improving the communication reliability of each subrack on the ring network.

The above is a detailed introduction to the multi-chassis cluster system and the chassis provided by the embodiment of the present invention, and the method for sending messages in the multi-chassis cluster system. In this paper, specific examples are used to illustrate the principles and implementation methods of the present invention. Explain that the description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (9)

1. A multi-chassis cluster system, characterized in that the multi-chassis cluster system includes at least three chassis, and the chassis are used to provide at least two interfaces, and communicate with the two chassis through the interfaces The boxes are interconnected to form a closed loop. 2. The multi-chassis cluster system according to claim 1, wherein the interface provided by the chassis is an Ethernet interface. 3. The multi-chassis cluster system according to claim 1 or 2, wherein said chassis transmits the data message to any other chassis according to the ring network protocol. 4. The multi-chassis cluster system according to claim 3, wherein the ring network protocol is a fast ring network protection protocol or a resilient packet ring protocol. 5. A method for sending messages in a multi-chassis cluster system, characterized in that the system includes at least three chassis, and the chassis are interconnected with two chassis through interfaces provided by themselves to form closing the loop, the method comprising: Determine the active control channel and backup control channel between the first chassis and the second chassis; The first subrack sends a data packet to the second subrack through the active control channel according to the ring network protocol. 6. The method of claim 5, further comprising: When the main control channel fails, the backup control channel is opened, and the first frame sends a data message to the second frame through the backup control channel according to the ring network protocol. 7. A machine frame, characterized in that the machine frame includes: At least two interfaces, the interfaces are respectively used to connect the first frame and the second frame; The protocol data processing unit is used to send the data received by the interface to the first chassis and the second chassis according to the ring network protocol. 8. The chassis according to claim 7, wherein the interface is an Ethernet interface. 9. The frame according to claim 7, wherein the ring network protocol is a fast ring network protection protocol or a resilient packet ring protocol.

Images