CN101510901B - Communication method, communication apparatus and system between distributed equipment - Google Patents

Abstract

The invention discloses a communication method among distributed devices, a communication device and a communication system. The method is applied in a network including a first device and a second device, the first device is located in the second IPC domain of the second device as a virtual IPC node, and the second device is located in the first IPC domain of the first device as a virtual IPC node In this method, the method includes: the active main control board of the first device sends the message sent to the second device to the first interface connected to the second device, and the source address of the message is the active main control board in the first IPC The IPC node identifier in the domain; the service board where the first interface is located forwards the message to the service board where the second interface is located on the second device; during the forwarding process, change the source address of the message to be that the first device is in the second IPC domain The virtual node identifier in ; the service board where the second interface is located sends the message to the active main control board of the second device. By using the invention, the communication based on the IPC domain among the distributed devices is realized, and the IP address resource in the network is saved.

Description

Communication method, communication device and communication system between distributed devices

technical field

The invention relates to the communication field, in particular to a communication method, communication equipment and a communication system between distributed equipment.

Background technique

As users have higher and higher requirements for network reliability, how to ensure uninterrupted network transmission has become a problem that must be solved. Especially in the access points of some important services such as Internet access points of enterprises and database servers of banks. If only one firewall device is used on these access points, no matter how high its reliability is, the system will inevitably bear the risk of network service interruption due to single point failure. In order to solve the above problems, a dual-machine hot standby method is introduced in the prior art. The so-called dual-machine hot backup can also be called dual-machine session backup. Its schematic diagram can be shown in FIG. 1A , the two firewall devices run equally in the network, there is no active/standby distinction, and load sharing can be performed between each other. When one of the firewall devices fails, as shown in Figure 1B, because the other device has backed up the session on the faulty device, the data flow can pass through the other device and take over the business operation on the faulty device in time , thereby avoiding the interruption of network services to a large extent.

During the dual-machine session backup process, a SOCKET connection is established between the service boards of the two devices (SOCKET includes address and port information, and one end can usually send a request to the peer end in the network through SOCKET or respond to a request from the peer end in the network) connection , and transmit the data to be backed up to the opposite end through the TCP (Transmission Control Protocol, Transmission Control Protocol)/IP (Internet Protocol, Internet Protocol) protocol stack. Take the connection between two devices shown in Figure 2 as an example. The service board on device A (IP address 192.268.1.1, Port number 24) communicates with device B (IP address 192.268.1.1, Port number 24) through interface a ) interface b of the service board is connected through SOCKET, and the data to be backed up is transmitted to the opposite end through the TCP/IP protocol stack. The problem in the prior art is that in the dual-device session backup, IP addresses need to be assigned to the two devices respectively, which consumes limited IP address resources in the network.

Contents of the invention

The invention provides a communication method between distributed devices, a communication device and a communication system, which are used to realize communication between distributed devices based on the IPC domain and save IP address resources in the network.

The present invention provides a communication method between distributed devices, which is characterized in that it is applied in a network including a first device and a second device, and the first device is located in the second device of the second device as a virtual IPC node. In the IPC domain, the second device is located in the first IPC domain of the first device as a virtual IPC node, and the method includes:

The active main control board of the first device sends the message sent to the second device to the first interface connected to the second device, and the source address of the message is the active main control board The IPC node identifier of the board in the first IPC domain;

The service board where the first interface is located forwards the message to the service board where the second interface is located on the second device; during the forwarding process, change the source address of the message to the 2. The virtual node identifier in the IPC domain;

The service board where the second interface is located sends the packet to the active main control board of the second device.

Wherein, the source address of the change message is an operation identified by the virtual node of the first device in the second IPC domain, and the service board where the first interface on the first device is located, or the second The service board where the second interface is located on the second device is completed.

Wherein, the message is a data message, and the main control board of the first device sends the message sent to the second device to the first interface connected to the second device including:

The active main control board of the first device encapsulates the IPC message sent to the second device into a data message;

The active main control board of the first device sends the data packet to the first interface connected to the second device.

Wherein, before the main main control board of the first device sends the message sent to the second device to the first interface connected to the second device, it further includes:

Setting the first IPC domain of the first device, the first IPC domain includes a plurality of IPC nodes and virtual IPC nodes corresponding to the second device; the main main control board in the first device, The standby main control board and each service board are respectively corresponding to an IPC node in the first IPC domain;

Setting the second IPC domain of the second device, the second IPC domain includes a plurality of IPC nodes and virtual IPC nodes corresponding to the first device; the main main control board in the second device, The standby main control board and each service board respectively correspond to an IPC node in the second IPC domain.

The present invention also provides a communication device, which is used as a first device in a network including a first device and a second device, and the first device is located in a second IPC domain of the second device as a virtual IPC node, so that The second device is located in the first IPC domain of the first device as a virtual IPC node, and the communication device includes an active main control board and multiple service boards:

The active main control board is configured to send the message sent to the second device to the first interface connected to the second device, and the source address of the message is the The IPC node identifier in the first IPC domain;

The service board corresponding to the first interface is configured to change the source address of the message to the virtual node identifier of the first device in the second IPC domain, and forward the message to the The service board where the second interface on the second device is located.

Wherein, the main main control board includes:

A message encapsulation unit, configured to encapsulate the IPC message sent to the second device into a data message;

A message sending unit, configured to send the data message to the first interface connected to the second device.

Wherein, the main main control board also includes:

An IPC domain setting unit, configured to set a first IPC domain of the first device, where the first IPC domain includes a plurality of IPC nodes and virtual IPC nodes corresponding to the second device; in the first device The active main control board, the backup main control board and each service board correspond to an IPC node in the first IPC domain respectively.

The present invention also provides a communication device, which is used as a second device in a network including a first device and a second device, and the first device is located in the second IPC domain of the second device as a virtual IPC node, so that The second device is located in the first IPC domain of the first device as a virtual IPC node, and the communication device includes an active main control board and multiple service boards:

The at least one service board is configured to receive a message sent by the first device to the second interface on the service board, and change the source address of the message so that the first device is in the second IPC domain virtual node identifier, and send the message to the active main control board;

The active main control board is configured to receive the message sent by the service board corresponding to the second interface.

Wherein, the main main control board also includes:

An IPC domain setting unit, configured to set a second IPC domain of the second device, where the second IPC domain includes a plurality of IPC nodes and virtual IPC nodes corresponding to the first device; in the second device The active main control board, the standby main control board and each service board correspond to an IPC node in the second IPC domain respectively.

The present invention also provides a communication system, including a distributed first device and a second device, the first device is located in the second IPC domain of the second device as a virtual IPC node, and the second device acts as a virtual the IPC node is located in the first IPC domain of the first device,

The first device is configured to send the message sent to the second device to the first interface connected to the second device through the master main control board, and the source address of the message is the master Use the IPC node identifier of the main control board in the first IPC domain; the service board where the first interface is located forwards the message to the service board where the second interface on the second device is located; during the forwarding process changing the source address of the message to the virtual node identifier of the first device in the second IPC domain;

The second device is configured to send the message to the active main control board of the second device through the service board where the second interface is located.

Compared with the prior art, the present invention has the following advantages:

By using the present invention, the communication device is added as a virtual IPC node into the IPC domain of the peer communication device that needs to communicate, and the IPC domain-based communication between distributed devices is realized by using the IPC domain and the virtual IP node, which saves network time. IP address resource.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1A is a schematic diagram of a dual-system hot standby network in the prior art;

FIG. 1B is a schematic diagram of a dual-machine hot standby network in the prior art when a device fails;

Fig. 2 is a schematic diagram of the connection of two devices in the dual-machine session backup process in the prior art;

3 is a flowchart of a communication method between distributed devices in the present invention;

Fig. 4 is the schematic diagram of the IPC node and IPC node number of distributed equipment among the present invention;

Fig. 5 is a schematic diagram of an undirected graph G of distributed equipment in the present invention;

Fig. 6 is the schematic diagram of virtual equipment IPC node and IPC node number of distributed equipment in the present invention;

的示意图；Fig. 7 is an undirected graph containing virtual device nodes of distributed devices in the present invention

schematic diagram;

Fig. 8 is a schematic diagram of a hot standby interface and a hot standby link between distributed devices in the present invention;

Fig. 9 is a schematic diagram of sending an IPC message from device A to device B in the present invention;

FIG. 10 is a schematic diagram of a protocol stack for sending an IPC message from device A to device B in the present invention;

Fig. 11 is a schematic structural diagram of the communication system provided in the present invention;

Fig. 12 is a schematic structural diagram of the first device in the communication system provided in the present invention;

Fig. 13 is a schematic structural diagram of a second device in the communication system provided in the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The present invention provides a communication method between distributed devices, which is applied in a network including a first device and a second device, wherein the first device is located in the second device as a virtual IPC (Inter-Process Communication) node In the second IPC domain of the first device, and the second device is located in the first IPC domain of the first device as a virtual IPC node, the communication method is shown in Figure 3, including:

Step s301, the active main control board of the first device sends the message sent to the second device to the first interface connected to the second device, the source address of the message is the active main control board in the first IPC domain The IPC node ID in .

Step s302, the service board where the first interface is located forwards the message to the service board where the second interface is located on the second device; during the forwarding process, change the source address of the message to the virtual address of the first device in the second IPC domain. Node ID.

Step s303, the service board where the second interface is located sends the message to the active main control board of the second device.

For the process of the main main control board of the second device forwarding the message sent to the first device to the main main control board of the first device, it is similar to the process described in the above steps s301-303, and will not be repeated here. .

In order to more clearly describe the communication method between distributed devices provided by the present invention, the mechanism of IPC is firstly introduced below.

IPC is a reliable inter-process communication mechanism, which realizes reliable transmission through methods such as retransmission and message confirmation. Physical entities that communicate using IPC are called IPC nodes. For example, when IPC communication is used between boards on a distributed device, each board is an IPC node. Each IPC node may correspond to a numerical number, which is called an IPC node number. A distributed device including 6 IPC nodes is shown in Figure 4. The numbers in brackets in Figure 4 indicate the IPC node numbers. For example, the IPC node number of the standby main control board is 1, the IPC node number of the active main control board is 2, and the IPC node numbers of other service boards are 3 to 6 respectively.

An important concept in IPC is the IPC field: let the set A={a ₁ , a ₂ ,..., a _m }, if A satisfies the following conditions: for any 1≤i, j≤m, and i≠j, all have a _i ≠a _j , then A is called an IPC domain, that is, the IPC nodes in the same IPC domain are unique. Because the device needs to determine the source of the IPC message according to the IPC node number of the IPC node, and confirm the message to the sender of the message based on this, it is required that a _i ≠ a _j . For example, the IPC domain of the distributed equipment shown in FIG. 4 is A={1, 2, 3, 4, 5, 6}, where the IPC node number of each IPC node is unique in the IPC domain.

An important concept in IPC is the IPC graph: Let the undirected graph G={V, E}, where V is the set of vertices and E is the set of edges. If the undirected graph G satisfies the following conditions:

(1) V={v ₁ , v ₂ ,..., v _m }, and v _i corresponds to a _i (1≤i≤m); that is, every IPC node in IPC domain A is in V Corresponds to and only corresponds to one vertex;

(2) E={(v _i , v _j )|v _i , v _j ∈ V, where i≠j, and the IPC communication between the IPC nodes a _i and a _j is satisfied};

Then the undirected graph G is called the IPC graph of the IPC domain A. IPC communication can be performed between any two IPC nodes in the IPC domain A. The undirected graph G of the distributed equipment shown in FIG. 4 is shown in FIG. 5 . That is, logically, a full-link IPC communication topology is established between IPC nodes, and IPC communication can be performed between any two IPC nodes.

Specifically, in the networking environment of distributed devices, the main control board of the distributed device controls the backup of session data, and virtualizes the peer device into an IPC communication node, representing the master control board of the peer device , to establish an IPC communication channel between two devices. The IPC node virtualized by the peer device is called a virtual device IPC node, and the numerical number corresponding to the virtual device IPC node is called a virtual device IPC node number. Taking the scenario shown in Figure 6 as an example, the IPC node numbers 1 to 6 marked in parentheses on the standby main control board, active main control board, and each service board in device A represent the internal IPC node numbers of device A. The IPC node number 7 marked in parentheses above B indicates the corresponding virtual device IPC node number after device A virtualizes peer device B as a virtual device IPC node.

也是IPC域，则称

为A的包含虚拟设备节点的IPC域。例如，图6中设备A的包含虚拟设备节点的IPC域是 $A\⊕=\left\{\mathrm{1,2,3,4,5,6,7}\right\},$ 其中7是虚拟设备IPC节点号，对应作为虚拟设备IPC节点的对端设备B。Let the set A={a ₁ , a ₂ , . . . , a _m } denote the IPC domain of device A. a _m+1 indicates the virtual device IPC node. order collection $A\⊕=\{a_1,a_2,......,a_m,a_{m+1}\},$ if

is also an IPC domain, it is called

An IPC domain containing virtual device nodes for A. For example, the IPC domain containing the virtual device node of device A in Figure 6 is $A\⊕=\left\{\mathrm{1,2,3,4,5,6,7}\right\},$ Among them, 7 is the virtual device IPC node number, corresponding to the peer device B as the virtual device IPC node.

的顶点集，E和

分别是G和

的边集。Let the undirected graph G={V, E} be the IPC graph of the IPC domain A of the device A, let the undirected graph $G\⊕=\{V\⊕,\mathrm{E.}\⊕\}$ is the IPC domain of device A containing virtual nodes The IPC diagram, where V and are G and

The vertex set of E and

are G and

edge set.

具有如下性质：From the above properties of G, we can know

Has the following properties:

$V\⊕=V\∪\left\{v_{m+1}\right\},$ Where v _m+1 is the node corresponding to the virtual device IPC node a _m+1 .

如图7所示。其中7是虚拟设备IPC节点号，对应作为虚拟设备IPC节点的对端设备B，其可以与IPC节点号为2的IPC节点(对应设备A中的业务板)通信。Taking the device A shown in Figure 6 as an example, the

As shown in Figure 7. Where 7 is the virtual device IPC node number, corresponding to the peer device B as the virtual device IPC node, which can communicate with the IPC node whose IPC node number is 2 (corresponding to the service board in device A).

In the method provided by the present invention, in order to transfer messages between device A and device B, a message transmission channel needs to be established, so the physical interface of device A and the physical port of device B can be used to connect to each other. For the convenience of description, the physical interface (hereinafter referred to as the first interface) on the above-mentioned device A connected to the device B, and the physical port on the device B connected to the device A (hereinafter referred to as the second interface) are called hot standby interface, the physical transmission channel between the first interface and the second interface is called a backup link. A schematic diagram of a hot standby interface and a backup link is shown in FIG. 8 .

Based on the above introduction, in the application scenario of the present invention, let the set $A\&CirclePlus;=\{a_1,a_2,......,a_m,a_{m+1}\}$ Indicates the first IPC domain of device A including the virtual IPC node, where a _m+1 represents the virtual device IPC node, and a ₁ represents the IPC node of the active main control board of device A. order collection $B\&CirclePlus;=\{{\mathrm{<figure-callout\; id="1"\; label="b"\; filenames="H2009100093503E00021.png,H2009100093503E00031.png"\; state="\{\{state\}\}">b</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="b"\; filenames="H2009100093503E00011.png,H2009100093503E00031.png"\; state="\{\{state\}\}">b</figure-callout>}}_2,......,b_{\mathrm{no}},b_{\mathrm{no}+1}\}$ Indicates that device B includes the second IPC domain of the virtual IPC node, where b _n+1 represents the virtual device IPC node, and b ₁ represents the IPC node of the active main control board of device B. The process of sending an IPC message from device A to device B is shown in Figure 9. The protocol stack through which the IPC message passes during the sending process is shown in Figure 10. The process of sending an IPC message includes the following steps:

In step s901, the active main control board of device A encapsulates the IPC message sent to device B into a data message, and transparently transmits it to the service board where the hot standby interface of device A is located.

In step s902, the hot standby interface of device A modifies the IPC source node number in the data message from a ₁ to b _n+1 , and then forwards it to the hot standby interface of device B.

Step s903, the service board where the hot standby interface of device B is located forwards the data message to the active main control board of device B, and the active main control board of device B decapsulates the data message into an IPC message and performs corresponding processing.

Or the process of sending the IPC message includes the following steps:

In step s901, the active main control board of device A encapsulates the IPC message sent to device B into a data message, and transparently transmits it to the service board where the hot standby interface of device A is located.

In step s902, the hot standby interface of device A forwards the data message to the hot standby interface of device B.

Step s903, after receiving the data message, the service board where the hot standby interface of device B is located changes the IPC source node number in the data message from a ₁ to b _n+1 , and forwards the data message to the master node of device B. Using the main control board, the main main control board of device B decapsulates the data message into an IPC message and performs corresponding processing.

As shown in Figure 10, the protocol stack involved in the message sending process includes:

Generate application layer data IPCD (IPCData) in the application layer APP on the master main control board of device A; encapsulate the application layer data IPCD (IPCData) before encapsulating the IPC data in the IPC layer on the master main control board of device A IPCH (IPC Header), wherein the IPC source node number SID (Source ID) is a ₁ ; the link layer header LH (Link Head) is encapsulated in the link layer Link of the active main control board of device A.

Comparing the above different processes, it can be found that after the message reaches the service board of device B, the IPC source node number SID (Source ID) is changed from a ₁ to b _n+1 . This modification can be implemented by the service board of device A, or Implemented by the service board of device B. After the message arrives at the main control board of device B, the data IPCD of the application layer is finally obtained through layer-by-layer decapsulation, and the main control board of device B can perform corresponding processing after obtaining the data IPCD of the application layer.

In addition, in the above application scenarios, the main main control board plays two roles of IPC nodes. Take the main main control board of device A as an example: it also serves as (1) the main main control board of device A IPC node a ₁ ; (2) Virtual IPC node b _n+1 of device B. In the case that the IPC supports multicast, when a message has multiple recipients: for example, the link establishment message sent by the IPC node a ₁ is destined for the multicast group including the virtual IPC node a _m+1 . For the source node of the IPC link building message of IPC node a ₁ : if a ₁ is not changed to b _n+1 , the IPC domain B cannot correctly respond to the link building message, resulting in unsuccessful link building; if a ₁ is changed to b _n+1 , other nodes in the IPC domain A cannot respond correctly, resulting in unsuccessful link establishment; if a1 sends the link establishment message in two categories (one is sent to the virtual node a _m+1 , the other One class is sent to other nodes in domain A), which increases the complexity of the IPC protocol and loses the advantage of multicast.

Therefore, in the process of the above-mentioned Fig. 9 and Fig. 10 of the present invention, when the service board of device A sends the message to the service board of device B, "modify the IPC source node number in the data message from a ₁ to b _{n +1} ", or when the service board of device B receives the message sent by the service board of device A, "change the IPC source node number in the data message from a ₁ to b _n+1 ", which can effectively avoid the above problems . The timing of the modification can also be described as when the message is forwarded across domains (that is, sent from the hot standby interface of IPC domain A and received from the hot standby interface of IPC domain B), it is an appropriate time to modify the IPC source node.

By using the method provided by the present invention, the communication device is added as a virtual IPC node to the IPC domain of the peer communication device that needs to communicate, and the IPC domain and the virtual IP node are used to realize the communication between distributed devices based on the IPC domain, saving IP address resource in the network.

The present invention also provides a communication system, as shown in FIG. 11 , including distributed first devices 10 and second devices 20 . Wherein, the first device 10 is located in the second IPC domain of the second device 20 as a virtual IPC node, and the second device 20 is located in the first IPC domain of the first device 10 as a virtual IPC node.

The first device 10 is configured to send the message sent to the second device 20 to the first interface connected to the second device 20 through the master main control board, and the source address of the message is the master master of the first device 10 The IPC node identification of the control board in the first IPC domain; the service board where the first interface is located forwards the message to the service board where the second interface is located on the second device 20; during the forwarding process, change the source address of the message to A virtual node identifier of the first device 10 in the second IPC domain.

The second device 20 is configured to send the message to the active main control board of the second device 20 through the service board where the second interface is located. The above operation of changing the source address of the message to the virtual node identifier of the first device 10 in the second IPC domain can be performed by the service board where the first interface on the first device 10 is located, or the service board where the second interface on the second device 20 is located. The implementation of the business board.

Specifically, the present invention also provides a communication device as the first device 10 shown in FIG. 10 above. As shown in FIG. :

The active main control board 11 is configured to send the message sent to the second device 20 to the first interface connected to the second device, and the source address of the message is in the first IPC domain of the active main control board 11 IPC node identifier;

The service board 12 corresponding to the first interface is used to change the source address of the message to the virtual node identifier of the first device 10 in the second IPC domain, and forward the message to the second device 20 on the second Service board where the interface resides.

Wherein, the above-mentioned master main control board 11 may further include:

The message encapsulation unit 111 is configured to encapsulate the IPC message sent to the second device 20 into a data message, and the source address of the message is the IPC node identifier of the master main control board 11 in the first IPC domain;

The message sending unit 112 is configured to send the data message encapsulated by the message encapsulating unit 111 to the first interface connected to the second device 20 .

The IPC domain setting unit 113 is configured to set the first IPC domain of the first device 10, the first IPC domain includes a plurality of IPC nodes and virtual IPC nodes corresponding to the second device 20; the master master in the first device The board 11, the standby main control board and each service board 12 respectively correspond to an IPC node in the first IPC domain.

Specifically, the present invention also provides a communication device as the second device 20 shown in FIG. 10 above. As shown in FIG.

At least one service board 22 is used to receive the message sent by the first device 10 to the second interface on the service board 22, and change the source address of the message to the virtual node identifier of the first device 10 in the second IPC domain, And send the message to the active main control board 21;

The active main control board 21 is configured to receive the message sent by the service board 22 corresponding to the second interface.

The main main control board 21 may also include:

The IPC domain setting unit 211 is configured to set the second IPC domain of the second device 20, the second IPC domain includes a plurality of IPC nodes and virtual IPC nodes corresponding to the first device 10; the master master in the second device The board 21, the standby main control board and each service board respectively correspond to an IPC node in the second IPC domain.

By using the above-mentioned system and device provided by the present invention, the communication device is added as a virtual IPC node to the IPC domain of the peer communication device that needs to communicate, and the IPC domain-based communication between distributed devices is realized by using the IPC domain and the virtual IP node. Communication saves IP address resources in the network.

Through the above description of the embodiments, those skilled in the art can clearly understand that the present invention can be realized by hardware, or by software plus a necessary general hardware platform. Based on this understanding, the technical solution of the present invention can be embodied in the form of software products, which can be stored in a non-volatile storage medium (which can be CD-ROM, U disk, mobile hard disk, etc.), including several The instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute the methods described in various embodiments of the present invention.

Those skilled in the art can understand that the drawing is only a schematic diagram of a preferred embodiment, and the units or processes in the drawing are not necessarily necessary for implementing the present invention.

Those skilled in the art can understand that the units in the device in the embodiment can be distributed in the device in the embodiment according to the description in the embodiment, and can also be changed and located in one or more devices different from the device in the embodiment. The units in the above embodiments can be combined into one unit, and can also be further divided into multiple subunits.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

Claims (10)

1. A communication method between distributed devices, characterized in that it is applied to a network comprising a first device and a second device, and the first device is located at the second device of the second device as a virtual inter-process communication IPC node In two IPC domains, the second device is located in the first IPC domain of the first device as a virtual IPC node, each IPC domain includes IPC nodes, and the IPC node identifiers of the IPC nodes in the same IPC domain are different from each other , the method includes: The active main control board of the first device sends the message sent to the second device to the first interface connected to the second device, and the source address of the message is the active main control board The IPC node identifier of the board in the first IPC domain; The service board where the first interface is located forwards the message to the service board where the second interface is located on the second device; during the forwarding process, change the source address of the message to the 2. The virtual node identifier in the IPC domain; The service board where the second interface is located sends the packet to the active main control board of the second device. 2. The method according to claim 1, wherein the change of the source address of the message is an operation of the virtual node identifier of the first device in the second IPC domain, and is performed by the first device The service board where the first interface is located, or the service board where the second interface is located on the second device is completed. 3. The method according to claim 1, wherein the message is a data message, and the active main control board of the first device sends the message sent to the second device to the The first interface connected to the second device includes: The active main control board of the first device encapsulates the IPC message sent to the second device into a data message; The active main control board of the first device sends the data packet to the first interface connected to the second device. 4. The method according to claim 1 or 3, wherein the master main control board of the first device sends the message sent to the second device to the second device connected to the second device. Before an interface also includes: Setting the first IPC domain of the first device, the first IPC domain includes a plurality of IPC nodes and virtual IPC nodes corresponding to the second device; the main main control board in the first device, The standby main control board and each service board are respectively corresponding to an IPC node in the first IPC domain; Setting the second IPC domain of the second device, the second IPC domain includes a plurality of IPC nodes and virtual IPC nodes corresponding to the first device; the main main control board in the second device, The standby main control board and each service board respectively correspond to an IPC node in the second IPC domain. 5. A communication device, characterized in that it is used as a first device in a network comprising a first device and a second device, and the first device is located on the second side of the second device as a virtual inter-process communication IPC node. In the IPC domain, the second device is located in the first IPC domain of the first device as a virtual IPC node, each IPC domain includes IPC nodes, and the IPC node identifiers of the IPC nodes in the same IPC domain are different from each other, The communication device includes an active main control board and multiple service boards: The active main control board is configured to send the message sent to the second device to the first interface connected to the second device, and the source address of the message is the The IPC node identifier in the first IPC domain; The service board corresponding to the first interface is configured to change the source address of the message to the virtual node identifier of the first device in the second IPC domain, and forward the message to the The service board where the second interface on the second device is located. 6. The communication device according to claim 5, wherein the main main control board comprises: A message encapsulation unit, configured to encapsulate the IPC message sent to the second device into a data message; A message sending unit, configured to send the data message to the first interface connected to the second device. 7. The communication device according to claim 6, wherein the active main control board further comprises: An IPC domain setting unit, configured to set a first IPC domain of the first device, where the first IPC domain includes a plurality of IPC nodes and virtual IPC nodes corresponding to the second device; in the first device The active main control board, the backup main control board and each service board correspond to an IPC node in the first IPC domain respectively. 8. A communication device, characterized in that it is used as a second device in a network comprising a first device and a second device, and the first device is located on the second side of the second device as a virtual inter-process communication IPC node. In the IPC domain, the second device is located in the first IPC domain of the first device as a virtual IPC node, each IPC domain includes IPC nodes, and the IPC node identifiers of the IPC nodes in the same IPC domain are different from each other, The communication device includes an active main control board and at least one service board: The at least one service board is configured to receive a message sent by the first device to the second interface on the service board, and change the source address of the message so that the first device is in the second IPC domain virtual node identifier, and send the message to the active main control board; The active main control board is configured to receive the message sent by the service board corresponding to the second interface. 9. The communication device according to claim 8, wherein the active main control board further comprises: An IPC domain setting unit, configured to set a second IPC domain of the second device, where the second IPC domain includes a plurality of IPC nodes and virtual IPC nodes corresponding to the first device; in the second device The active main control board, the standby main control board and each service board correspond to an IPC node in the second IPC domain respectively. 10. A communication system, characterized in that it comprises a distributed first device and a second device, the first device is located in the second IPC domain of the second device as a virtual inter-process communication IPC node, the The second device is located in the first IPC domain of the first device as a virtual IPC node, each IPC domain includes IPC nodes, and the IPC node identifiers of the IPC nodes in the same IPC domain are different from each other, The first device is configured to send the message sent to the second device to the first interface connected to the second device through the master main control board, and the source address of the message is the master Use the IPC node identifier of the main control board in the first IPC domain; the service board where the first interface is located forwards the message to the service board where the second interface on the second device is located; during the forwarding process changing the source address of the message to the virtual node identifier of the first device in the second IPC domain; The second device is configured to send the message to the active main control board of the second device through the service board where the second interface is located.

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