WO2009012683A1

WO2009012683A1 - Multi-frame trunking system and frame

Info

Publication number: WO2009012683A1
Application number: PCT/CN2008/071535
Authority: WO
Inventors: Da Zhou; Xiaowei Huang; Lu Yang; Dajun Zang; Dongcheng Yang; Gang Gai; Lingqiang Fan; Baoyuan Zhang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-07-20
Filing date: 2008-07-03
Publication date: 2009-01-29
Also published as: CN101094238A

Abstract

A multi-frame trunking system and frame, and a method for transmitting packets in the system are provided. The system includes at least three frames, and each frame is provided with at least two interfaces. Each frame connects with adjacent frame in the system through the interfaces to form closed ring. The system can simplify the control channel connections in the frames, and improve the reliability of data transmission.

Description

Multi-chassis cluster system and chassis

This application claims priority to Chinese Patent Application No. 200710130106.3, entitled "Multi-Chassis Cluster System and Chassis" on July 20, 2007, the entire contents of which are hereby incorporated by reference. in.

Technical field

The present invention relates to the field of network communication technologies, and in particular, to a multi-chassis cluster system and a chassis, and a method for transmitting a "^ text" in a multi-chassis cluster system.

Background technique

As the communication network puts higher and higher requirements on the interface capacity and switching capacity of the device, it is difficult for the single-frame system to meet the increasing demand. It is a trend to increase the capacity of the system by using the two-chassis-to-multi-chassis cascading mode. Multi-chassis cascading refers to the use of cascading technology to interconnect existing single-chassis devices to form a new multi-chassis device, which is extended in terms of switching capacity and interface capacity.

In the multi-chassis cascading system, the control channel and the service channel between the chassis are required to be provided. The control channel mainly completes the communication between the chassis, and implements control packet transmission, routing table synchronization, and host frame pair between the chassis. The function of monitoring the status of the subrack; the service channel is the channel for forwarding and exchanging service packets.

The prior art proposes a full interconnection structure based on a multi-chassis cluster system, in which each node is connected to other nodes, and the connection may be an Ethernet connection or other physical implementation. In this connection mode, data from one node to another can be delivered directly.

In the process of implementing the present invention, the inventors have found through research that since the prior art is a fully interconnected structure, each node is connected with other nodes, resulting in an abnormal connection between the nodes, thereby making the multi-frame cluster system internal. The control channel connections are very complex, and because the failure probability of each control channel is the same, the complex control channel also reduces the reliability of the system data transmission. In addition, since each node is connected to other nodes, each node needs to provide more interconnect ports, which leads to higher design costs.

Summary of the invention

The embodiment of the invention provides a multi-chassis cluster system, which makes the control channel connection inside multiple chassis simple.

An embodiment of the present invention provides a chassis, and the chassis can be interconnected with two chassis to form a closed loop. The embodiment of the invention provides a method for transmitting a message in a multi-chassis cluster system, which can improve the reliability of data transmission between the chassis on the ring network.

An embodiment of the present invention provides a multi-chassis cluster system, where the multi-chassis cluster system includes at least three chassis, each of the chassis is configured to provide at least two interfaces, and through the interface. Interconnecting with adjacent frames in the system respectively forms a closed loop.

An embodiment of the present invention provides a chassis, where the chassis includes:

At least two interfaces, the interfaces are respectively configured to connect the first chassis and the second chassis;

The protocol data processing unit is configured 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 transmitting a message in a multi-chassis cluster system, where the system includes at least three machine frames, and each of the chassis in the system is respectively configured by using an interface provided by itself. Adjacent chassis interconnections in the system form a closed loop, the method comprising:

Determining the primary control channel and the alternate control channel between the chassis;

A chassis sends a data packet to another chassis through the active control channel according to the ring network protocol. The foregoing solution can be seen that the chassis of the embodiment of the present invention is interconnected with two chassis to form a closed loop by using the interface provided by itself, and compared with the connection of each single node and other single nodes in the prior art. The embodiment of the invention avoids the complicated connection relationship between multiple chassis, thereby simplifying the control channel connection inside multiple chassis.

In the embodiment of the present invention, the multiple frames are interconnected to form a closed loop. When the data packet is transmitted, the chassis selects the control channel to transmit the data packet to the other arbitrary chassis according to the ring network protocol. The ring network protocol is In the normal state, the standby control channel is closed, and the data packet is transmitted through the active control channel. When the primary control channel fails, the standby control channel is opened, and data packets are transmitted through the control channel, so that when a single chassis fails, It does not affect the service, thus realizing the protection function of the ring network, and also improving the reliability of communication between the various frames on the ring network.

DRAWINGS

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

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

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

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.

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

detailed description

The embodiments of the present invention provide a multi-chassis cluster system, a chassis, and a method for transmitting a message in a multi-chassis cluster system. To enable those skilled in the art to better understand the embodiments of the present invention, the present invention will be described below with reference to the accompanying drawings. The technical solutions of the embodiments are described.

Embodiment 1 is a multi-chassis cluster system. In this embodiment, a single ring network is configured for multiple chassis. As shown in FIG. 1, the multi-chassis cluster system includes at least three machines. Box, each chassis in the system provides two interfaces. The interface can be an Ethernet interface, an X.25 interface, or any other physical interface.

Each of the chassis in the system is interconnected with two adjacent chassis by an interface provided by itself to form a single closed loop, thereby obtaining a closed loop network.

Each frame in the system transmits data packets to any other machine in the system through a ring network protocol such as Resilient Packet Ring (RPR) or Rapid Ring Protection Protocol (RRPP). frame.

The following takes the RRPP running scenario as an example to describe in detail how the chassis sends data to other chassis:

As shown in Figure 2, it is assumed that data exchange is required between the chassis A and the chassis D. The chassis A and the chassis D have two control channels for communication between the chassis. One of the control channels is the slave chassis. A-frame B-frame C-frame D between the path, the solid line indicates the control channel, this control channel is called the main control channel; the other control channel is the chassis A-frame The path between the F-frame E-frame D, the control channel is indicated by a dotted line, and this control channel is called the alternate control channel.

The RRPP protocol only opens one control channel at the same time, and the other control channel is closed and is in the backup state. In the normal state, the data packets from chassis A to chassis D will be transmitted along the active control channel, and the standby control channel will be closed.

If a certain chassis on the active control channel fails, the RRPP protocol will open the control channel indicated by the dotted line. The data packets from chassis A to chassis D are transmitted through the dotted path, thus implementing the ring network. Protective function.

Embodiment 2: A multi-chassis cluster system, which is described in the embodiment In the case of a ring network, as shown in FIG. 3, the multi-chassis cluster system includes at least three chassis, and each chassis in the system provides four interfaces. The interface can be an Ethernet interface, an X.25 interface, or any other physical interface.

Each of the frames in the system is interconnected with two adjacent frames by two interfaces provided by itself to form a closed loop.

Each of the frames in the system is interconnected with two adjacent frames by a separate interface provided by itself to form a closed loop, thereby obtaining a closed loop network comprising two closed loops. 3 shows the two closed loops by dashed lines and solid lines, respectively.

Each chassis in the system transmits data packets to any other chassis in the system through a ring network protocol such as RPR or RRPP.

Compared with the first embodiment, the present embodiment forms two closed loops between multiple chassis. When a certain chassis exchanges data with any other chassis, four control channels can be used to transmit datagrams. In the first embodiment, a closed loop is formed between multiple chassis. When data is exchanged between the chassis, only two control channels can be used to transmit data packets.

In addition, since the present embodiment has two closed loops, when one closed loop fails, another closed loop can be used for data transfer, thereby further improving the reliability of data transmission. The closed loop used in the normal state is usually referred to as the main closed loop, and the other closed loop is referred to as the standby closed loop. Since the first embodiment 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 other chassis provide two interfaces.

The chassis is interconnected with other chassis by the interfaces provided by the chassis to form three closed loops. They are: Chassis 1 - Chassis 2 - Chassis 3 - Chassis 4 - Chassis 5 - Chassis 1 Closed loop formed between the machine; machine H 1 national machine ^ I 7-machine only 11 6-machine only 11 4-machine only 11 5-machine 11 11 closed loop; and machine ^ I 1 national machine The closed loop formed between the frame 2 - the frame 3 - the frame 4 - the frame 6 - the frame 7 - the frame 1.

According to the foregoing three embodiments, the chassis of the embodiment of the present invention transmits the data packet to the other arbitrary chassis through the ring network protocol, and the ring network protocol closes the standby control channel in the normal state, and passes the active control channel. When a data packet is transmitted, when the primary control channel fails, the standby control channel is enabled, and the data packet is transmitted through the control channel, so that the service does not affect the service when a single chassis fails, thereby implementing the protection function of the ring network. It also improves the reliability of communication between the various frames on the ring network. In addition, since each chassis is only connected to an adjacent chassis, the interconnection between the chassis is simple, installable, and maintainable, and the design cost can also be reduced.

Finally, the multi-ring networking design can also be implemented in the embodiment of the present invention. When a closed loop loop fails, data can be transmitted through other closed loops, thereby further improving the reliability of communication between the chassis on the ring network.

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

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

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

Embodiment 5: A chassis, as shown in FIG. 6, the chassis includes four interfaces, which are respectively a first interface, a second interface, a third interface, and a fourth interface; The chassis can be connected to the first chassis through the third interface, and the fourth interface is connected to the second chassis, so that the first chassis and the second chassis can perform data interaction. It can be seen that the first chassis and the second chassis can actually implement data interaction through two channels.

It should be noted that the chassis of the fourth embodiment and the fifth embodiment are all provided with interfaces in pairs. In addition, the chassis provided by the embodiments of the present invention may also be configured without interfaces.

For example, the three interfaces of the chassis are connected to the three chassis, and then the data interaction between the three chassis is implemented by the protocol data processing unit. In addition, the interface has three interfaces. The chassis can also be connected to the two chassis separately, and then the data interaction between the two chassis is realized by the protocol data processing unit.

It can be seen from the above that the chassis of the embodiment of the present invention can provide at least two interfaces. When multiple chassis are interconnected, the chassis can be interconnected with two chassis to form a closed interface. The embodiment of the present invention avoids the complicated connection relationship between multiple chassis frames, thereby simplifying the control channel connection inside multiple chassis frames.

The sixth embodiment is a method for transmitting a packet in a multi-chassis cluster system, where the system includes at least three chassis, and the chassis is respectively interconnected with two chassis through an interface provided by the chassis. Forming a closed loop, the method comprising: Determining the primary control channel and the secondary control channel between the first chassis and the second chassis; in the normal state, the first chassis sends a data packet to the second chassis through the primary control channel according to the ring network protocol; When the primary control channel fails, the standby control channel is opened, and the first chassis sends a data packet to the second chassis by using the standby control channel according to the ring network protocol. The ring network protocol may be an RPR or RRPP protocol.

A person skilled in the art can understand that all or part of the steps of implementing the foregoing embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, such as: ROM/RAM. Disk, CD, etc.

It can be seen that, in the embodiment of the present invention, the multiple frames are interconnected to form a closed loop. When the data packet is transmitted, the chassis selects the control channel according to the ring network protocol to transmit the data packet to the other arbitrary chassis. The ring network protocol closes the standby control channel under normal conditions, and transmits data packets through the active control channel. When the primary control channel fails, the standby control channel is opened, and data packets are transmitted through the control channel, so that the data frame is in a single chassis. When the fault occurs, the service is not affected, thereby realizing the protection function of the ring network, and also improving the reliability of communication between the various frames on the ring network.

The method for transmitting a message in a multi-chassis cluster system and a chassis and a multi-chassis cluster system according to the embodiment of the present invention is described in detail. In this paper, a specific example is applied to the principle and implementation manner of the present invention. It is to be noted that the description of the above embodiments is only for helping to understand the method of the present invention and its core ideas; 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 specific embodiments and applications. In the above, the contents of this specification are not to be construed as limiting the invention.

Claims

Rights request

A multi-chassis cluster system, wherein the multi-chassis cluster system includes at least three chassis, each of the chassis is configured to provide at least two interfaces, and The interfaces are interconnected with adjacent chassis in the system to form a closed loop.

2. The multi-chassis cluster system according to claim 1, wherein each of the chassis in the system provides two interfaces, and two adjacent ones of the systems through the interface. The chassis are interconnected to form a single closed loop, resulting in a closed loop network.

3. The multi-chassis cluster system according to claim 1, wherein each of the chassis in the system provides four interfaces, and two of the interfaces are respectively adjacent to the two adjacent frames. The interconnections are made to form a closed loop, and the other two interfaces are respectively interconnected with two adjacent frames in the system to form a closed loop, thereby obtaining a closed loop network comprising two closed loops.

The multi-chassis cluster system according to claim 1, wherein the multi-chassis cluster system includes at least four chassis, wherein at least two chassis provide three interfaces, and the remaining chassis are Providing two interfaces, each of the chassis in the system is interconnected with other chassis in the system by an interface provided by itself to form at least three closed loops, thereby obtaining a closed network including at least three closed loops .

The multi-chassis cluster system of claim 1, wherein the interface provided by each chassis in the system is an Ethernet interface.

The multi-chassis cluster system according to claim 1 or 5, wherein each of the chassis in the system transmits a data packet to any other chassis in the system according to a ring network protocol.

The multi-chassis cluster system according to claim 6, wherein the ring network protocol is a fast ring network protection protocol or an elastic packet ring protocol.

A method for transmitting a message in a multi-chassis cluster system, wherein the system includes at least three chassis, each of the chassis in the system separately and through the interface provided by the system Adjacent chassis interconnections in the system form a closed loop, the method comprising:

A chassis sends a data packet to another chassis through the active control channel according to the ring network protocol.

The method according to claim 8, wherein the method further comprises:

When the primary control channel fails, the standby control channel is opened, and a chassis is according to the ring. The network protocol sends a data packet to another chassis through the standby control channel.

A chassis, wherein the chassis includes:

11. The chassis of claim 10, wherein the interface is an Ethernet interface.

The chassis of claim 10, wherein the ring network protocol is a fast ring network protection protocol or an elastic packet ring protocol.