WO2021129502A1

WO2021129502A1 - Method for allocating and determining ip address of network element, network element, and management domain network

Info

Publication number: WO2021129502A1
Application number: PCT/CN2020/137125
Authority: WO
Inventors: 王栋
Original assignee: 中兴通讯股份有限公司
Priority date: 2019-12-23
Filing date: 2020-12-17
Publication date: 2021-07-01
Also published as: CN113098702A

Abstract

Provided is a method for allocating IP address of network element, which is used in a serving network element. The serving network element is used in a management domain network, the management domain network comprises a plurality of network elements, the plurality of network elements comprise at least one client network element and only one serving network element; the method comprises: receiving request information originating from a request network element and comprising an identifier of the request network element (S101); wherein, the request network element is a client network element, the request information is used to be forwarded by a flooding manner; according to a pre-stored address table, determining a target IP address of the request network element, and determining that the identifier and the target IP address of the request network element are stored in the address table (S102); wherein, the target IP address does not conflict with the existing IP address of the network element in the management domain network. The embodiment of the present disclosure also provides a method for determining IP address of network element, a network element, and a management domain network.

Description

Method for allocating and determining the IP address of network element, network element, management domain network

Cross references to related applications

This application is filed based on the Chinese patent application with the application number 201911342540.7 and the filing date on December 23, 2019, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated into this application by reference.

Technical field

The embodiments of the present disclosure relate to the field of Internet technology, in particular to methods for allocating and determining IP addresses of network elements, network elements, and management domain networks.

Background technique

The network elements in the network need to have their own IP (Internet Protocol) addresses as their address identifiers in the network.

Among them, the IP address of the network element can be manually set, but this will consume a lot of manpower and time; or, the IP address of the network element can also be automatically generated according to the device type of the network element, etc., but this will easily cause the IP address of the network element to occur Conflict (that is, different network elements have the same IP address), some of the network elements are out of control and cannot be managed normally, and subsequent inspections still require a lot of manpower and time; especially when the network is large and the networking environment is more complicated , The above problems are even more serious.

Summary of the invention

The embodiments of the present disclosure provide a method for allocating and determining the IP address of a network element, a network element, and a management domain network.

In the first aspect, the embodiments of the present disclosure provide a method for allocating the IP address of a network element for a service network element, the service network element is used in a management domain network, the management domain network includes a plurality of network elements, the The multiple network elements include at least one customer network element and only one service network element; the method includes: receiving request information from a requesting network element that includes an identifier of the requesting network element; wherein, the requesting network element Is a client network element, the request information is used to be forwarded by flooding; the target IP address of the requesting network element is determined according to a pre-stored address table, and it is determined that the identification of the requesting network element is stored in the address table And the target IP address; wherein the target IP address does not conflict with the existing IP address of the network element in the management domain network.

In the second aspect, the embodiments of the present disclosure provide a method for determining the IP address of a network element for requesting a network element, where the requesting network element is used in a management domain network, and the management domain network includes a plurality of network elements. The multiple network elements include at least one customer network element and only one service network element, and the requesting network element is a customer network element; the method includes: broadcasting and sending request information including the identification of the requesting network element; The request information is used to be forwarded by flooding; according to the result caused by the request information, the IP address of the requesting network element is determined.

In a third aspect, the embodiments of the present disclosure provide a method for forwarding information, which is used for forwarding network elements, where the forwarding network elements are used in a management domain network, and the management domain network includes multiple network elements. The element includes at least one customer network element and only one service network element, and the forwarding network element is a customer network element; the method includes: when receiving a request from a requesting network element that includes an identification of the requesting network element Information, the request information is flooded and forwarded; when the allocation information including the identification of the requesting network element and the target IP address is received from the serving network element, the allocation information is flooded and forwarded.

In a fourth aspect, the embodiments of the present disclosure provide a service network element for use in a management domain network. The management domain network includes multiple network elements. The multiple network elements include at least one customer network element and only include one service. The network element; the service network element includes: a network unit having at least one interface for connecting to other network elements of the management domain network; one or more processors; a memory on which one or more programs are stored , When the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned method for allocating network element IP addresses; one or more I/O interfaces are connected Between the processor and the memory, it is configured to implement information interaction between the processor and the memory.

In a fifth aspect, embodiments of the present disclosure provide a requesting network element for use in a management domain network. The management domain network includes multiple network elements, and the multiple network elements include at least one customer network element and only include one service. A network element, where the requesting network element is a customer network element; the requesting network element includes: a network unit having at least one interface for connecting to other network elements of the management area network; one or more processors; and a memory , There are one or more programs stored thereon, and when the one or more programs are executed by the one or more processors, the one or more processors implement the aforementioned method for determining the IP address of a network element; One or more I/O interfaces are connected between the processor and the memory, and are configured to implement information interaction between the processor and the memory.

In a sixth aspect, embodiments of the present disclosure provide a forwarding network element for use in a management domain network. The management domain network includes multiple network elements, and the multiple network elements include at least one customer network element and only one service. Network element, the forwarding network element is a customer network element; the forwarding network element includes: a network unit having at least one interface for connecting to other network elements of the management area network; one or more processors; and a memory , There are one or more programs stored thereon, and when the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned method for forwarding information; one or more One I/O interface is connected between the processor and the memory, and is configured to implement information interaction between the processor and the memory.

In a seventh aspect, embodiments of the present disclosure provide a management domain network, including: one service network element described above; at least one customer network element, each of the customer network elements being the aforementioned requesting network element or the aforementioned forwarding network element. In some embodiments, the serving network element is an access network element that accesses the upper network.

Description of the drawings

The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure, and constitute a part of the specification, and are used to explain the present disclosure together with the embodiments of the present disclosure, and do not constitute a limitation to the present disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing some embodiments with reference to the accompanying drawings. In the accompanying drawings:

Figure 1 is an exemplary connection topology diagram of some management domain networks;

FIG. 2 is a flowchart of a method for allocating the IP address of a network element according to an embodiment of the disclosure;

FIG. 3 is a flowchart of another method for allocating the IP address of a network element according to an embodiment of the disclosure;

FIG. 4 is a flowchart of another method for allocating the IP address of a network element according to an embodiment of the present disclosure;

FIG. 5 is a flowchart of a method for determining the IP address of a network element according to an embodiment of the disclosure;

6 is a flowchart of another method for determining the IP address of a network element provided by an embodiment of the disclosure;

FIG. 7 is a flowchart of another method for determining the IP address of a network element according to an embodiment of the present disclosure;

FIG. 8 is a flowchart of information forwarding provided by an embodiment of the disclosure;

FIG. 9 is a block diagram of the composition of a service network element provided by an embodiment of the disclosure;

FIG. 10 is a block diagram of the composition of a requesting network element provided by an embodiment of the disclosure;

FIG. 11 is a block diagram of the composition of a forwarding network element provided by an embodiment of the disclosure;

FIG. 12 is a block diagram of the composition of a management domain network provided by an embodiment of the disclosure.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, the method for allocating and determining the IP address of the network element, the network element, and the management domain network provided by the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

Hereinafter, the embodiments of the present disclosure will be more fully described with reference to the accompanying drawings, but the illustrated embodiments may be embodied in different forms, and should not be construed as being limited to the embodiments set forth in the present disclosure. On the contrary, the purpose of providing these embodiments is to make the present disclosure thorough and complete, and to enable those skilled in the art to fully understand the scope of the present disclosure.

The embodiments of the present disclosure may be described with reference to plan views and/or cross-sectional views with the help of ideal schematic diagrams of the present disclosure. Therefore, the example illustrations may be modified according to manufacturing technology and/or tolerances.

In the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

The terms used in the present disclosure are only used to describe specific embodiments, and are not intended to limit the present disclosure. The term "and/or" as used in this disclosure includes any and all combinations of one or more related listed items. The singular forms "a" and "the" as used in this disclosure are also intended to include plural forms, unless the context clearly dictates otherwise. As used in the present disclosure, the terms "including" and "made of" designate the presence of the described features, wholes, steps, operations, elements and/or components, but do not exclude the presence or addition of one or more other features, Whole, steps, operations, elements, components and/or groups thereof.

Unless otherwise defined, the meanings of all terms (including technical and scientific terms) used in the present disclosure are the same as those commonly understood by those of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of the related technology and the present disclosure, and will not be interpreted as having idealized or excessive formal meanings, Unless the present disclosure is specifically so limited.

The embodiments of the present disclosure are not limited to the embodiments shown in the drawings, but include modifications of configurations formed based on manufacturing processes. Therefore, the regions illustrated in the drawings have schematic properties, and the shapes of the regions shown in the figures exemplify the specific shapes of the regions of the elements, but are not intended to be limiting.

The embodiments of the present disclosure are used for management domain networks, and each management domain network is composed of multiple directly or indirectly connected network elements, that is, any two network elements in the same management domain network can only pass through the internal network of the management domain network. The links are connected to each other.

Among them, "Network Element (EN)" is equivalent to the "element" that constitutes the network, which is specifically a relatively independent device with relatively complete functions and capable of accessing the network, such as computers, switches, routers, etc. Each network element has its own IP (Internet Protocol, Internet Protocol) address as its address identifier in the network.

Among them, the network elements in each management domain network are independently managed, so the IP addresses of any two network elements in the same management domain network cannot be the same, and the IP addresses of network elements in different management domain networks can be the same.

Referring to Figure 1, the connection topology of the network elements in each management area network can be in the form of star, ring, hybrid, etc.; and some network elements in the management area network can also be connected to the upper network (such as the DCN backbone network) to Realize the connection between different management domain networks.

The management domain network of the embodiment of the present disclosure includes a plurality of network elements, of which one and only one selected network element is a service network element, and the other network elements are all customer network elements.

According to the working mode of the service network element and the customer network element of the embodiment of the present disclosure, when a certain customer network element (referred to as the requesting network element at this time) needs to obtain an IP address, it can be used without manual or upper-layer network intervention. Next, only relying on the management domain network itself can assign non-conflicting IP addresses to the requesting network element, thereby realizing the automatic management of the management domain network's own network element IP addresses.

In the first aspect, the embodiments of the present disclosure provide a method for allocating network element IP addresses, which is used in a service network element, and the service network element is used in a management domain network. The management domain network includes multiple network elements, and the multiple network elements include at least One customer network element and only one service network element.

2, the method of the embodiment of the present disclosure includes:

S101. Receive request information originating from a requesting network element and including an identifier of the requesting network element.

Among them, the requesting network element is a client network element, and the requesting information is used to be forwarded by flooding.

The serving network element receives the request information, which is generated by the requesting network element (customer network element that needs to obtain an IP address) and then broadcasted, and forwarded by flooding, so that it will eventually reach the serving network element. Wherein, the request information includes at least the identification of the requesting network element, that is, it indicates which customer network element the requested information comes from.

S102: Determine the target IP address of the requesting network element according to the pre-stored address table, and determine that the identification of the requesting network element and the target IP address are stored in the address table.

Among them, the target IP address does not conflict with the existing IP address of the network element in the management domain network.

The address table is pre-stored in the service network element, and the address table records the correspondence between existing network elements in the management domain network (such as indicated by the identification of the network element) and the IP address (each corresponding relationship is when the network element joins the management domain Automatically recorded during the network), that is, the current IP address allocation status of the management domain network is recorded.

Therefore, according to the address table, the serving network element can assign an IP address (target IP address) that does not conflict (that is, different from the existing IP address of any network element in the management domain network) for the requesting network element, and can guarantee The corresponding relationship between the target IP address and the requesting network element is written in the address table, thereby completing the process of assigning an IP address to the requesting network element.

As a way of the embodiment of the present disclosure, referring to FIG. 3, the request information also includes the temporary IP address of the requesting network element; the target IP address of the requesting network element is determined according to the pre-stored address table, and it is determined that the requesting network element is stored in the address table The identifier and target IP address (step S102) include:

S1021, according to the pre-stored address table, determine whether the temporary IP address conflicts with the existing IP address of the network element in the management domain network.

S1022. When the temporary IP address does not conflict with the existing IP address of the network element in the management domain network, determine that the temporary IP address is the target IP address of the requesting network element.

S1023. When the temporary IP address conflicts with the existing IP address of the network element in the management domain network, it is determined that the IP address that does not conflict with the existing IP address of the network element in the management domain network is the target IP address of the requesting network element, and the broadcast includes The identification of the requesting network element and the allocation information of the target IP address, and the identification of the requesting network element and the target IP address are written into the address table.

Among them, the allocation information is used to be forwarded by flooding.

The request information may also include a temporary IP address selected by the requesting network element for itself, so that the serving network element can determine whether the temporary IP address is an existing IP address of the management domain network (that is, whether it conflicts) according to the address table:

If there is no conflict, the requesting network element is allowed to directly use the temporary IP address as its own IP address (the confirmation information can be fed back to the requesting network element or not), and the corresponding relationship between the temporary IP address and the requesting network element can be ensured. In the address table (if the corresponding relationship does not exist in the address table, the corresponding relationship needs to be written into the address table; if the corresponding relationship already exists in the address table, no operation is required).

If there is a conflict, a non-conflicting IP address is re-determined as the target IP address, and the allocation information including the target IP address is finally transmitted to the requesting network element by means of broadcast transmission and flood forwarding, so that the requesting network element can use the target IP address. The target IP address is used as its own IP address; at the same time, the serving network element also needs to write the correspondence between the target IP address and the requesting network element into the address table.

As another way of the embodiment of the present disclosure, referring to FIG. 4, determining the target IP address of the requesting network element according to the pre-stored address table, and determining that the identification of the requesting network element and the target IP address are stored in the address table (step S102) includes :

S1024. Determine that the IP address that does not conflict with the existing IP address of the network element in the management domain network is the target IP address of the requesting network element, broadcast and send out allocation information including the identification of the requesting network element and the target IP address, and send the requesting network element The identification and target IP address are written into the address table.

Among them, the allocation information is used to be forwarded by flooding.

In other words, there is no temporary IP address in the request information, so the serving network element does not make conflict judgments, but directly obtains the target IP address based on the request information, and sends the target IP address to the requesting network element through the allocation information, and at the same time The correspondence between the target IP address and the requesting network element is written into the address table.

In the second aspect, the embodiments of the present disclosure provide a method for determining the IP address of a network element, which is used to request the network element to be used in a management domain network. The management domain network includes multiple network elements, and the multiple network elements include at least If a customer network element includes only one service network element, the request network element is a customer network element.

5, the method of the embodiment of the present disclosure includes:

S201: Broadcast and send request information including the identification of the requested network element.

Among them, the request information is used to be forwarded by flooding.

The requesting network element is a client network element that needs to obtain an IP address, and it can send request information including its own identification by means of broadcast transmission. Since the request information is sent by broadcast and is flooded and forwarded, it must eventually reach the above service network element.

S202: Determine the IP address of the requesting network element according to the result caused by the request information.

When the serving network element receives the request information, it must process it and produce a certain "result", so that the requesting network element can determine its own IP address based on the result. Among them, the "results caused by the requested information" includes all the consequences of the operations performed by the service network element according to the requested information. This operation can be to send the above allocation information, so the "result" for the requesting network element is "the allocation information is received within a predetermined time". This operation can also be to not feedback when there is no conflict, so the "result" for the requesting network element That is, "the distribution information has not been received within the predetermined time."

As a way of the embodiment of the present disclosure, referring to FIG. 6, before broadcasting the request information including the identification of the requesting network element (step S201), the method further includes:

S200: Determine the temporary IP address of the requesting network element, and add the temporary IP address to the request information.

According to the result caused by the request information, determining the IP address of the requesting network element (step S202) includes:

S2021: When receiving the allocation information from the serving network element and including the identification of the requesting network element and the target IP address within a preset time, determine that the target IP address is the IP address of the requesting network element.

S2022, when the allocation information is not received within the preset time, determine that the temporary IP address is the IP address of the requesting network element.

When an IP address needs to be obtained, the requesting network element can first determine an IP address (temporary IP address) by itself, and add the temporary IP address to the request information and send it out (that is, the request information also includes the temporary IP address).

Therefore, the serving network element can perform different operations based on determining whether the temporary IP address conflicts with the existing IP address of the management domain network:

If there is a conflict, the serving network element can re-determine the non-conflicting target IP address and send out allocation information, and the requesting network element can receive the allocation information and use the target IP address as its own IP address.

If there is no conflict, from the perspective of reducing network traffic, the serving network element may not send the allocation information, so the requesting network element will not receive the allocation information within a certain period of time, and it can be judged that the temporary IP address is conflict-free. You can directly use the temporary IP address as your own IP address.

As another way of the embodiment of the present disclosure, referring to FIG. 7, according to the result caused by the request information, determining the IP address of the requesting network element (step S202) includes:

S2023: Receive allocation information from the serving network element that includes the identification of the requesting network element and the target IP address, and determine that the target IP address is the IP address of the requesting network element.

That is to say, the requesting network element may not generate a temporary IP address, so that the target IP address fed back by the serving network element can be directly used as its own IP address.

In a third aspect, the embodiments of the present disclosure provide a method for forwarding information, which is used for forwarding network elements. The forwarding network elements are used in a management domain network. The management domain network includes multiple network elements, and the multiple network elements include at least one customer network. It includes only one service network element, and the forwarding network element is the customer network element.

Referring to FIG. 8, the method of the embodiment of the present disclosure includes:

S301: When receiving the request information from the requesting network element and including the identification of the requesting network element, flood and forward the request information.

S302: When receiving the allocation information from the serving network element and including the identification of the requesting network element and the target IP address, flood forward the allocation information.

In some embodiments, the request information further includes the temporary IP address of the requesting network element.

Other customer network elements in the management domain network (that is, customer network elements that do not need to obtain an IP address) are forwarding network elements, and they should have the ability to flood and forward the above request information and distribution information.

In a fourth aspect, referring to FIG. 9, an embodiment of the present disclosure provides a service network element for use in a management domain network. The management domain network includes multiple network elements, and the multiple network elements include at least one customer network element and only include one service. Network elements; service network elements include:

A network element, which has at least one interface for connecting to other network elements of the management domain network;

One or more processors;

A memory, which stores one or more programs, when one or more programs are executed by one or more processors, so that the one or more processors implement the aforementioned method for allocating network element IP addresses;

One or more I/O interfaces are connected between the processor and the memory, and are configured to implement information interaction between the processor and the memory.

The embodiment of the present disclosure also provides a network element product, which is a service network element capable of realizing the above functions.

In the embodiments of the present disclosure, the processor is a device with data processing capabilities, including but not limited to a central processing unit (CPU), etc.; the memory is a device with data storage capabilities, including but not limited to random access memory (RAM, More specifically, such as SDRAM, DDR, etc.), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory (FLASH); I/O interface (read and write interface) is connected between the processor and the memory, It can realize the information interaction between the memory and the processor, which includes but is not limited to the data bus (Bus) and so on.

In a fifth aspect, referring to FIG. 10, an embodiment of the present disclosure provides a requesting network element for use in a management domain network. The management domain network includes multiple network elements. The multiple network elements include at least one customer network element and only include one service. Network element, the requesting network element is a customer network element; the requesting network element includes:

One or more processors;

A memory with one or more programs stored thereon, and when the one or more programs are executed by one or more processors, the one or more processors implement the aforementioned method for determining the IP address of a network element;

The embodiment of the present disclosure also provides a network element product, which is a requesting network element capable of realizing the above functions.

In the embodiments of the present disclosure, the processor is a device with data processing capabilities, including but not limited to a central processing unit (CPU), etc.; the memory is a device with data storage capabilities, including but not limited to random access memory (RAM, More specifically, such as SDRAM, DDR, etc.), read-only memory (ROM), charged erasable programmable read-only memory (EEPROM), flash memory (FLASH); I/O interface (read and write interface) is connected between the processor and the memory, It can realize the information interaction between the memory and the processor, which includes but is not limited to the data bus (Bus), etc.

In the sixth aspect, referring to FIG. 11, an embodiment of the present disclosure provides a forwarding network element for use in a management domain network. The management domain network includes multiple network elements. The multiple network elements include at least one customer network element and only include one service. Network elements, forwarding network elements are customer network elements; forwarding network elements include:

One or more processors;

A memory with one or more programs stored thereon, and when the one or more programs are executed by one or more processors, the one or more processors implement the foregoing information forwarding method;

The embodiment of the present disclosure also provides a network element product, which is a forwarding network element capable of realizing the above functions.

In the embodiments of the present disclosure, the processor is a device with data processing capabilities, including but not limited to a central processing unit (CPU), etc.; the memory is a device with data storage capabilities, including but not limited to random access memory (RAM, More specifically, such as SDRAM, DDR, etc.), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory (FLASH); I/O interface (read and write interface) is connected between the processor and the memory, It can realize the information interaction between the memory and the processor, which includes but is not limited to the data bus (Bus), etc.

In the sixth aspect, referring to FIG. 12, an embodiment of the present disclosure provides a management domain network, including:

One of the aforementioned service network elements;

At least one customer network element, and the customer network element is the aforementioned requesting network element or the aforementioned forwarding network element.

The management domain network of the embodiment of the present disclosure includes multiple network elements, of which one and only one selected network element is the above service network element, the other network elements are customer network elements, and each customer network element is a request network element. Yuan or forwarding network element.

It should be understood that the requesting network element and the forwarding network element are distinguished based on the operations they perform, and it does not mean that the requesting network element and the forwarding network element must be two different customer network elements. For example, the same customer network element is a forwarding network element when it does not need to obtain an IP address, and it is a requesting network element when it needs to obtain an IP address, and it can essentially have the functions of forwarding and requesting network elements at the same time.

In some embodiments, the serving network element is an access network element that accesses the upper network.

Among them, if the management domain network also needs to access the upper network (such as the DCN backbone network), the access network element connected to the upper network can be used as the above service network element, so that the upper network can know the IP address allocation status of the management domain network. Information interaction between all network elements in the management domain network and the upper network.

In some embodiments, the working process of the management area network of the embodiments of the present disclosure may specifically include:

S601. Request the network element to determine the temporary IP address.

When a certain customer network element needs to obtain an IP address, it is a requesting network element, and the requesting network element can determine a temporary IP address (temporary IP address).

Specifically, the requesting network element may be a customer network element newly accessing the management domain network, so it needs to obtain an IP address; at this time, the temporary IP address may be randomly generated, or may be generated according to the device type of the requesting network element itself.

Or, when the original customer network element in the management domain network is restarted, or when a user's command is received, the IP address can be re-obtained to request the network element; at this time, the temporary IP address can be the previous IP address, or It can be generated randomly or according to the type of equipment.

S602. The requesting network element sends the request information in a broadcast manner, the requesting information includes the identifier of the requesting network element and the temporary IP address, and the requesting information is used to be forwarded in a flooding manner.

The requesting network element adds the above temporary IP address and its own identification to the request information, and sends the request information in a broadcast manner, that is, the request information is sent from all ports connected to other network elements.

The identification of the requesting network element may be any content that can uniquely indicate the identity of the requesting network element, for example, the serial number of the hardware of the requesting network element, the number configured by the user for the requesting network element, and so on.

Wherein, the request information can be in any specific form, as long as it can indicate that it is request information and contains the identifier and temporary IP address of the requested network element.

For example, the request information can be a request message (such as a discover message), and the message format can be:

[0001 + ID of the requested network element + temporary IP address];

Among them, "0001" is the value of the message type bit, which indicates that the message is a request message.

Wherein, the destination mac address (dmac address) of the request message can be: 01:80:c2:0e:00:00; in the embodiment of the present disclosure, the message whose destination is the above mac address is specified, but the actual destination is not the mac address. It means that the message is a message that needs to be flooded and forwarded.

S603. The forwarding network element receives the request information, and floods and forwards it.

When any other client network element receives the request information, it is a forwarding network element, so that the request information can be forwarded from all ports except the source port to realize flooding and forwarding.

It should be understood that the customer network element that implements the forwarding function at this time may be other customer network elements other than the above requesting network element; or, if there are multiple requesting network elements at the same time, a certain requesting network element may also be forwarded by other requesting network elements. For the request information sent by the element, the requesting network element is also the forwarding network element at this time.

S604. The serving network element receives the request information, and judges whether the temporary IP address therein conflicts with the IP address of the existing network element according to the locally stored address table.

The service network element receives the request information, determines that it is the request information according to the value of the message type bit, etc., and reports it to the CPU (central processing unit) for analysis, and obtains the identity and temporary IP address of the requesting network element in it. Determine whether the temporary IP address exists in the address table (that is, whether it conflicts).

Of course, the specific process of realizing conflict judgment is diverse.

For example, you can first search for the identity of the requesting network element in the address table, and if so, continue to check whether the IP address corresponding to the requesting network element in the address table is the same as the temporary IP address, and the same means that there is no conflict.

If the ID of the requesting network element does not exist in the address table, or the ID of the requesting network element exists in the address table but the corresponding IP address is different from the temporary IP address, continue to search for the temporary IP address in the address table. If it is found, it means it exists Conflict, if not retrieved, it means no conflict.

S605. When the temporary IP address does not conflict, the serving network element may not perform subsequent operations.

Therefore, the requesting network element does not receive the allocation information, and can use the non-conflicting temporary IP address as its own IP address, and the IP address allocation process is completed.

Of course, if this step is replaced by the service network element sending out "confirmation information" and other information, it is also feasible.

S606. When the temporary IP address conflicts with the IP address of the existing network element, the serving network element determines that the IP address that does not conflict with the IP address of the existing network element is the target IP address, and compares the target IP address with the identification of the requesting network element Write to the address table.

When the serving network element finds that the temporary IP address conflicts with the IP address of the existing network element, it needs to re-determine (such as sequentially or randomly) a non-conflicting IP address, and use the IP address as to be assigned to the request The target IP address of the network element. After that, the serving network element writes the identification of the requesting network element and the target IP address into the address table, so as to save the correspondence between the requesting network element and the target IP address in the address table.

Among them, when the identity of the requesting network element originally already exists in the address table, the above writing is equivalent to "update" the corresponding IP address, and when the identity of the requesting network element does not originally exist in the address table, the above Writing is equivalent to "adding" the corresponding relationship in the address table.

S607. The serving network element sends out distribution information in a broadcast manner, the distribution information includes the identification of the requesting network element and the target IP address, and the distribution information is used to be forwarded in a flooding manner.

The serving network element adds the above target IP address and the identification of the requesting network element to the distribution information, and sends it out in a broadcast manner, that is, it sends out the distribution information from all its ports connected to other network elements.

Wherein, the allocation information can be in any specific form, as long as it can indicate that it is allocation information and contains the identifier of the requested network element and the target IP address.

For example, the allocation information can be an allocation message (such as an offer message), and its message format can be:

[0002 + ID of the requested network element + target IP address];

Among them, "0002" is the value of the message type bit, which indicates that this message is an assigned message.

Wherein, the destination mac address (dmac address) of the request message can be: 01:80:c2:00:0f:00; in the embodiment of the present disclosure, the message whose purpose is the above mac address is specified, but the actual purpose is not the mac address. It means that the message is a message that needs to be flooded and forwarded.

S608: The forwarding network element receives the distribution information, and floods and forwards it.

When the forwarding network element (all customer network elements except the requesting network element) receives the allocation information, it can report it to the CPU, and according to its own status and the identification in the allocation information, it can be determined that the allocation information is not caused by the request information sent by itself Therefore, the distribution information can be forwarded from all ports except the source port to achieve flood forwarding.

S609. The requesting network element receives the allocation information, and uses the target IP address therein as its own IP address.

When the requesting network element receives the allocation information, it can report it to the CPU. According to the identifier, it can be determined that the allocation information is caused by the request information sent by itself. Therefore, it should contain the IP address assigned by the serving network element to itself, so that it can be used. The target IP address is used as its own IP address.

Of course, when the requesting network element determines that the distribution information is not caused by the request information sent by itself according to the identifier in the distribution information, it is equivalent to a forwarding network element, and the distribution information should be flooded and forwarded.

Of course, as before, if the requesting network element has not received the allocation information, it can directly determine to use the temporary IP address as its own IP address.

S610. In some examples, the requesting network element sends the request information in a broadcast manner, the request information includes the identification of the requesting network element and its own IP address, and the request information is used to be forwarded by flooding.

After the requesting network element has updated its own IP address, it can add the new IP address to the request message and send it out, so that after receiving the request message, the serving network element should determine that it will not conflict and confirm the IP address assignment The process is complete.

Of course, this step is only to better ensure the correctness of the IP address allocation process, so it is not necessary.

Of course, it should be understood that what has been described above is only the working mode of each network element in the embodiment of the present disclosure, and does not mean that steps S601 to S610 must be performed in a specific order. For example, if the requesting network element is directly connected to the serving network element, the information transfer between the two can be realized without actually forwarding the network element.

Of course, it should be understood that in the embodiments of the present disclosure, in order to avoid the formation of infinite loop forwarding of information, corresponding forwarding rules can be further set to stop forwarding some information:

For example, for any network element, it can be set to forward the same information (that is, information with exactly the same content) only once.

For example, when the serving network element receives the requested information, or the requesting network element receives the distribution information corresponding to its own (determined according to the identification therein), it indicates that the information has reached the final destination. Therefore, in addition to processing in the above manner , The message should no longer be forwarded

For example, when the service network element receives the distribution information, it must be the distribution information sent back by itself. Therefore, the information can be discarded by switching chips and other methods, and the forwarding will not be continued.

For example, when the requesting network element receives the request information sent by itself (determined according to the identifier therein), the request information sent by itself must be forwarded back again, so the information can be discarded by means of switching chips, and no longer forwarded.

It can be seen that according to the embodiments of the present disclosure, it is possible to transfer information between network elements within the management domain network (ie, private layer 2) without using the upper layer network for management (that is, without the need for a three-layer network) and without human intervention. Information transmission), automatically realize the management of the network element IP address in the management domain network, and avoid the network element being out of control due to IP address conflicts.

A person of ordinary skill in the art can understand that all or some of the steps, functional modules/units in the system, and devices disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof.

In the hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may consist of several physical components. The components are executed cooperatively.

Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit (CPU), digital signal processor, or microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as Application specific integrated circuit. Such software may be distributed on a computer-readable medium, and the computer-readable medium may include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well known by those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile data implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Sexual, removable and non-removable media. Computer storage media include, but are not limited to, random access memory (RAM, more specifically SDRAM, DDR, etc.), read-only memory (ROM), charged erasable programmable read-only memory (EEPROM), flash memory (FLASH) or other disk storage ; CD-ROM, digital versatile disk (DVD) or other optical disk storage; magnetic cassette, tape, magnetic disk storage or other magnetic storage; any other that can be used to store desired information and can be accessed by a computer medium. In addition, it is well known to those of ordinary skill in the art that a communication medium usually contains computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium. .

The present disclosure has disclosed some embodiments, and although specific terms are adopted, they are only used and should only be interpreted as general descriptive meanings, and are not used for the purpose of limitation. In some instances, it is obvious to those skilled in the art that, unless expressly indicated otherwise, the features, characteristics, and/or elements described in combination with a specific embodiment may be used alone, or features, characteristics, and/or elements described in combination with other embodiments may be used. Combination of features and/or components. Therefore, those skilled in the art will understand that various changes in form and details can be made without departing from the scope of the present disclosure as set forth by the appended claims.

Claims

A method for allocating the IP address of a network element, used for a service network element, the service network element is used in a management domain network, the management domain network includes a plurality of network elements, and the plurality of network elements includes at least one customer network It includes only one service network element; wherein, the method includes:

Receiving request information originating from a requesting network element and including an identifier of the requesting network element; wherein the requesting network element is a client network element, and the request information is used to be forwarded by flooding;

Determine the target IP address of the requesting network element according to the pre-stored address table, and determine that the identification of the requesting network element and the target IP address are stored in the address table; wherein, the target IP address and the management domain network The existing IP addresses of the middle network elements do not conflict.
The method according to claim 1, wherein the request information further includes a temporary IP address of the requesting network element; the determining the target IP address of the requesting network element according to a pre-stored address table, and determining the address The identifier and target IP address of the requesting network element stored in the table include:

Determining, according to a pre-stored address table, whether the temporary IP address conflicts with the existing IP address of the network element in the management domain network;

When the temporary IP address does not conflict with the existing IP address of the network element in the management domain network, determining that the temporary IP address is the target IP address of the requesting network element;

When the temporary IP address conflicts with the existing IP address of the network element in the management domain network, it is determined that an IP address that does not conflict with the existing IP address of the network element in the management domain network is the target of the requesting network element IP address, broadcast the allocation information including the identification of the requesting network element and the target IP address, and write the identification and target IP address of the requesting network element into the address table; wherein, the allocation information is used for flooding The way is forwarded.
The method according to claim 1, wherein the determining the target IP address of the requesting network element according to a pre-stored address table, and determining that the identification of the requesting network element and the target IP address are stored in the address table comprises :

Determine that the IP address that does not conflict with the existing IP address of the network element in the management domain network is the target IP address of the requesting network element, broadcast and send out allocation information including the identification of the requesting network element and the target IP address, and The identification and target IP address of the requesting network element are written into an address table; wherein, the allocation information is used to be forwarded in a flooding manner.
A method for determining the IP address of a network element, used for requesting a network element, the requesting network element is used in a management domain network, the management domain network includes a plurality of network elements, and the plurality of network elements includes at least one customer network And only includes one serving network element, and the requesting network element is a customer network element; wherein, the method includes:

Broadcast sending request information including the identification of the requesting network element; wherein, the request information is used to be forwarded by flooding;

According to the result caused by the request information, the IP address of the requesting network element is determined.
The method according to claim 4, wherein, before the broadcast transmission of the request information including the identification of the requesting network element, the method further comprises: determining a temporary IP address of the requesting network element, and setting the temporary IP address Add the requested information;

The determining the IP address of the requesting network element according to the result caused by the request information includes:

When receiving the allocation information from the serving network element and including the identification of the requesting network element and the target IP address within a preset time, determining that the target IP address is the IP address of the requesting network element;

When the allocation information is not received within the preset time, it is determined that the temporary IP address is the IP address of the requesting network element.
The method according to claim 4, wherein the determining the IP address of the requesting network element according to the result caused by the request information comprises:

Receiving allocation information from a serving network element that includes the identification of the requesting network element and a target IP address, and determining that the target IP address is the IP address of the requesting network element.
A method for forwarding information is used for forwarding network elements. The forwarding network elements are used in a management domain network. The management domain network includes multiple network elements. The multiple network elements include at least one customer network element and only It includes a service network element, and the forwarding network element is a customer network element; wherein, the method includes:

When receiving request information originating from a requesting network element and including an identifier of the requesting network element, flood and forward the request information;

When receiving the allocation information from the serving network element and including the identification of the requesting network element and the target IP address, the allocation information is flooded and forwarded.
The method according to claim 7, wherein:

The request information also includes the temporary IP address of the requesting network element.
A service network element is used in a management domain network, the management domain network includes multiple network elements, and the multiple network elements include at least one customer network element and only one service network element; wherein, the service network Yuan includes:

A network unit having at least one interface for connecting to other network elements of the management domain network;

One or more processors;

A memory having one or more programs stored thereon, and when the one or more programs are executed by the one or more processors, the one or more processors can implement any one of claims 1 to 3 The method of allocating the IP address of the network element as described in the item;

One or more I/O interfaces are connected between the processor and the memory, and are configured to implement information interaction between the processor and the memory.
A requesting network element used in a management domain network, the management domain network including multiple network elements, the multiple network elements including at least one customer network element and only one service network element, and the requesting network element is Customer network element; wherein, the requesting network element includes:

A network unit having at least one interface for connecting to other network elements of the management domain network;

One or more processors;

A memory having one or more programs stored thereon, and when the one or more programs are executed by the one or more processors, the one or more processors can implement any one of claims 4 to 6 The method for determining the IP address of the network element described in the item;

One or more I/O interfaces are connected between the processor and the memory, and are configured to implement information interaction between the processor and the memory.
A forwarding network element used in a management domain network. The management domain network includes multiple network elements. The multiple network elements include at least one customer network element and only one service network element. The forwarding network element is Customer network element; wherein, the forwarding network element includes:

A network unit having at least one interface for connecting to other network elements of the management domain network;

One or more processors;

A memory having one or more programs stored thereon, and when the one or more programs are executed by the one or more processors, the one or more processors realize the method according to claim 7 or 8. The method of forwarding information;

One or more I/O interfaces are connected between the processor and the memory, and are configured to implement information interaction between the processor and the memory.
A management domain network, including:

A service network element according to claim 9;

At least one customer network element, and each customer network element is the requesting network element according to claim 10 or the forwarding network element according to claim 11.
The management area network according to claim 12, wherein:

The serving network element is an access network element that accesses the upper network.