WO2016070679A1

WO2016070679A1 - Network state synchronizing method and apparatus

Info

Publication number: WO2016070679A1
Application number: PCT/CN2015/088980
Authority: WO
Inventors: 张民贵; 何健飞; 陈国义; 董杰; 苗福友
Original assignee: 华为技术有限公司
Priority date: 2014-11-06
Filing date: 2015-09-06
Publication date: 2016-05-12
Also published as: CN105635223A

Abstract

Embodiments of the present invention provide a network state synchronizing method and apparatus. The method comprises: a first forwarding device receives a control packet, wherein the control packet comprises network state information presented in a file format, and the network state information is used for indicating the property of a second forwarding device; and the first forwarding device acquires the network state information from the control packet. This solution does not rely on a negotiation result based on a routing protocol, and improves the network state synchronizing efficiency.

Description

Method and device for synchronizing network status

The present application claims priority to Chinese Patent Application, filed on Nov. 6, 2014, to the Chinese Patent Office, Application No. CN 201410623562.1, entitled "Method and Apparatus for Synchronizing Network Status", the entire contents of which are incorporated by reference. In this application.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method for synchronizing network status, a first forwarding device, and a network device.

Background technique

Generally, routing refers to the path information that guides packet forwarding. The routing protocol refers to the pre-agreed rules and standards in the routing guide packet forwarding process. For example, the routing protocol may be in a data packet format. For example, the data packet format is a type-length-value (English: Type-length-value, or TLV).

The network formed by the operator may include a first forwarding device and a second forwarding device that support different private routing protocols. When the first forwarding device and the second forwarding device perform network state synchronization based on the respective private routing protocols, the first forwarding device and the second forwarding device need to negotiate the private routing protocol. For example, the second forwarding device may learn the meaning of the TLV representation in the private routing protocol adopted by the first forwarding device by performing a private routing protocol negotiation with the first forwarding device, so that the parsing is obtained based on the first Network status information sent by a private routing protocol of the forwarding device. The first forwarding device may negotiate the private routing protocol with the second forwarding, and learn the meaning of the TLV representation in the private routing protocol adopted by the second forwarding device, so as to parse and obtain the private based on the second forwarding device. Network status information sent by the routing protocol. In this way, the scheme of network state synchronization based on protocol negotiation limits the efficiency of synchronizing network states.

Summary of the invention

The method for synchronizing network status, the first forwarding device, and the network device provided by the embodiments of the present invention help improve the efficiency of synchronizing network states.

To this end, the embodiments of the present invention provide the following technical solutions:

In a first aspect, a method for synchronizing network status is provided, the method comprising:

The first forwarding device receives the control packet, where the control packet includes network state information represented by a file format, where the network state information is used to indicate an attribute of the second forwarding device;

The first forwarding device obtains the network status information from the control message.

In combination with the first aspect, the first possible implementation of the first aspect is provided, and further includes:

The first forwarding device updates the network state information library saved by the first forwarding device by using the network state information.

In conjunction with the first aspect or the first possible implementation of the first aspect, a second possible implementation of the first aspect is also provided, where the file format is Extensible Markup Language (English: Extensible Markup Language, referred to as: XML) format or Javascript Object Notation (JSON) format.

A third possible implementation of the first aspect is further provided in combination with the first aspect, the first possible implementation of the first aspect, and the second possible implementation of the first aspect, The network status information is described by another next-generation (Yet Another Next Generation, YANG) language. The first forwarding device obtains the network status information from the control message, including:

The first forwarding device parses the control packet by using a network configuration (English: Network Configuration, Netconf) protocol to obtain the network state information.

In combination with the first aspect, the first possible implementation of the first aspect, the second possible implementation of the first aspect, and any of the third possible implementations of the first aspect, a first In a fourth possible implementation manner, the receiving, by the first forwarding device, the control packet includes: the first forwarding device receiving the control packet from the controller; or the first forwarding device receiving the control packet The control packet of the second forwarding device.

In a second aspect, a method for synchronizing network status is provided, the method comprising:

The network device obtains network status information, where the network status information is used to indicate an attribute that the second forwarding device has;

The network device encodes the network state information into a file format, and obtains a control packet, where the control packet includes the network state information represented by the file format;

The network device sends the control packet to the first forwarding device.

In conjunction with the second aspect, a first possible implementation of the second aspect is provided, the file format being an XML format or a JSON format.

With the second aspect or the first possible implementation of the second aspect, the second possible implementation manner of the second aspect is further provided, the network device encoding the network state information into a file format, including:

The network device describes the network state information in a YANG language.

In conjunction with the second aspect, the first possible implementation of the second aspect, and the second possible implementation of the second aspect, a third possible implementation of the second aspect is further provided The network device is a controller or the second forwarding device.

In a third aspect, a first forwarding device is provided, where the first forwarding device includes:

a receiving unit, configured to receive a control message, where the control message includes network state information represented by a file format, where the network state information is used to indicate an attribute of the second forwarding device;

And an obtaining unit, configured to obtain the network state information from the control message received by the receiving unit.

In combination with the third aspect, the first possible implementation manner of the third aspect is provided, and further includes:

And an update unit, configured to update the network state information library saved by the first forwarding device by using the network state information obtained by the obtaining unit.

In conjunction with the third aspect or the first possible implementation of the third aspect, a second possible implementation of the third aspect is also provided, where the file format is an XML format or a JSON format.

In conjunction with the third aspect, the first possible implementation of the third aspect, and the second possible implementation of the third aspect, a third possible implementation of the third aspect is further provided The network status information is described in YANG language.

The obtaining unit is specifically configured to use the Netconf protocol to parse the control packet received by the receiving unit to obtain the network state information.

In combination with the third aspect, the first possible implementation of the third aspect, the second possible implementation of the third aspect, and the third possible implementation of the third aspect, a third is also provided A fourth possible implementation of the aspect, the receiving unit has the control message for receiving the controller, or the receiving unit is specifically configured to receive the Control messages.

In a fourth aspect, a network device is provided, where the network device includes:

a first obtaining unit, configured to obtain network state information, where the network state information is used to indicate an attribute that the second forwarding device has;

a second obtaining unit, configured to encode the network state information obtained by the first obtaining unit into a file format, to obtain a control message, where the control message includes the network state information represented by the file format ;

And a sending unit, configured to send the control packet to the first forwarding device.

In conjunction with the fourth aspect, a first possible implementation of the fourth aspect is provided, where the file format is an XML format or a JSON format.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, a second possible implementation manner of the fourth aspect is further provided, where the second obtaining unit is specifically configured to describe the network state information by using a YANG language .

In a fifth aspect, a first forwarding device is provided, where the first forwarding device includes: a processor, a memory, and a communication interface;

The memory for storing program instructions and data;

The processor is configured to read program instructions and data stored in the memory, and perform the following operations:

Receiving, by the processor, the control packet, where the control packet includes network state information represented by a file format, where the network state information is used to indicate an attribute of the second forwarding device;

The processor obtains the network status information from the control message.

With reference to the fifth aspect, the first possible implementation manner of the fifth aspect is provided, and the method further includes:

The processor updates the network state information library saved by the first forwarding device by using the network state information.

In conjunction with the fifth aspect or the first possible implementation manner of the fifth aspect, a second possible implementation manner of the fifth aspect is further provided, where the file format is an XML format or a JSON format.

In combination with the fifth aspect, the first possible implementation manner of the fifth aspect, and the second possible implementation manner of the fifth aspect, a third possible implementation manner of the fifth aspect is further provided. The network status information is described in the YANG language, and the obtaining, by the processor, the network status information from the control message includes:

The processor configures the Netconf protocol by using a network, parses the control packet, and obtains the network state information.

In combination with the fifth aspect, the first possible implementation manner of the fifth aspect, the second possible implementation manner of the fifth aspect, or any one of the third possible implementation manners of the fifth aspect, A fourth possible implementation manner of the aspect, the receiving, by the processor, the control message by using the communication interface, that: the processor receives the control message from the controller by using the communication interface; or the processing The device receives the control message from the second forwarding device through the communication interface.

In a sixth aspect, a network device is provided, where the network device includes: a processor, a memory, and a communication interface;

The memory for storing program instructions and data;

Obtaining, by the processor, the obtained network status information by using the communication interface, where the network status information is used to indicate an attribute that the second forwarding device has;

The processor encodes the network status information into a file format, and obtains a control message, where the control message includes the network status information represented by the file format;

The processor sends the control message to the first forwarding device by using the communication interface.

With reference to the sixth aspect, a first possible implementation manner of the sixth aspect is provided, where the file format is an XML format or a JSON format.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, the second possible implementation manner of the sixth aspect is further provided, the processor encoding the network state information into a file format, including:

The processor describes the network status information in a YANG language.

With reference to the sixth aspect, the first possible implementation manner of the sixth aspect, and the second possible implementation manner of the sixth aspect, the third possible implementation manner of the sixth aspect is further provided The network device is a controller or the second forwarding device.

The method and device for synchronizing the network state in the embodiment of the present invention, when synchronizing the network state information of the second forwarding device to other forwarding devices in the network, for example, synchronizing to the first forwarding device, The second forwarding device or the controller may encode the network state information of the second forwarding device into a file format, and send the network state information represented by the file format to the first forwarding device by using the control packet. After receiving the control packet, the first forwarding device can obtain the network state information in the file format from the control packet, and then obtain the network state information, and synchronize the network state information of the second forwarding device to the first forwarding device. The process of synchronizing the network state between the first forwarding device and the second forwarding device does not depend on the negotiation result of the routing protocol, and helps improve the efficiency of synchronizing the network state.

DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings to be used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only These are some of the embodiments described in this application, and other figures can be obtained from those of ordinary skill in the art in view of these drawings.

1 is a flow chart of a method for synchronizing network states according to an embodiment of the present invention;

2 is a flow chart of another method for synchronizing network states according to an embodiment of the present invention;

3 is a schematic diagram of a first forwarding device according to an embodiment of the present invention;

4 is a schematic diagram of a network device according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of hardware of a first forwarding device according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic diagram showing the hardware structure of a network device according to an embodiment of the present invention.

detailed description

The embodiments of the present invention are further described in detail below with reference to the drawings and embodiments.

A typical network may include forwarding devices that support different private routing protocols. The private routing protocol may be a routing protocol developed by a certain vendor, and the private routing protocol may not be a standard routing protocol. The private routing protocol may be a protocol in which a specific TLV is set based on the standard routing protocol. For example, in the network formed by the operator, the first forwarding device supports the first private routing protocol, and the second forwarding device supports the second private routing protocol, and the first private routing protocol is different from the second private routing protocol. The first private routing protocol may be a protocol in which the first TLV format is registered in the Internet Assigned Numbers Authority (IANA). Second private road The agreement may be a protocol in which the second TLV format is registered with IANA. In this way, the first forwarding device may generate a first control message according to the requirement of the first TLV format. The first control message includes the first network state information. For example, the first network status information is an identifier of the first forwarding device and a port of the first forwarding device. The second forwarding device may generate a second control packet according to the requirement of the second TLV format. The second control message includes the second network state information. For example, the second network state information includes an identifier of the second forwarding device and a port of the second forwarding device. The first forwarding device performs a routing protocol negotiation with the second forwarding device, so that the first forwarding device learns the second TLV format, and the second forwarding device learns the first TLV format. When the first forwarding device synchronizes with the second forwarding device, the first forwarding device parses the second control packet to obtain the second network state information. The second forwarding device parses the first control packet to obtain the first network state information. In this way, synchronization of the network state is completed between the first forwarding device and the second forwarding device.

If the first forwarding device needs to synchronize network status with multiple forwarding devices in the network, the first forwarding device needs to negotiate with each forwarding device of the multiple forwarding devices to determine The TLV format adopted by each forwarding device increases the complexity of the synchronization process. If the routing protocol used by a forwarding device changes, such as updating a routing protocol or developing a new routing protocol, it needs to re-apply to IANA to register, making the routing protocol less scalable and less efficient.

In view of the above problems, embodiments of the present invention propose a solution that helps improve the efficiency of synchronizing network states. The solution is that the second forwarding device can obtain the control packet from the second forwarding device or the controller in the process of synchronizing the network state information with the first forwarding device. The control message includes the network status information represented in a file format. The network status information is an attribute of the second forwarding device. The first forwarding device parses the control packet to obtain the network state information, so that the first forwarding device does not need to negotiate with a private routing protocol with the second forwarding device, which helps improve the synchronization network. The efficiency of the state. This solution can be implemented by the following embodiments.

The forwarding device for synchronizing the network state in the embodiment of the present invention may be a device having a forwarding function, such as a router or a switch, which is not specifically limited in this embodiment of the present invention; the control packet in the embodiment of the present invention is used for the transmission and forwarding device. Network status information, any network that can be used to transmit forwarding devices The message or message of the network status information belongs to the category of the control message in the embodiment of the present invention. The control packet in the embodiment of the present invention is described by taking the network state information of the second forwarding device as an example. The control packet in the embodiment of the present invention may also carry multiple network state information, and each network state information corresponds to A forwarding device is not illustrated in this embodiment of the present invention.

The corresponding embodiment of Figure 1 illustrates the method provided by the present invention from the perspective of a first forwarding device. The first forwarding device is a device that receives network status of other forwarding devices. Referring to FIG. 1, a method for synchronizing network states according to an embodiment of the present invention may include:

The first forwarding device receives a control packet, where the control packet includes network state information represented by a file format, where the network state information is used to indicate an attribute of the second forwarding device.

For example, the control message provided by the embodiment of the present invention is different from the first control message or the second control message. The payload portion of the control message provided by the embodiment of the present invention includes a file. For example, the file may be a file in an XML format or a file in a JSON format. The file may also use other text formats, which are not illustrated here. In this way, the first forwarding device can negotiate the routing protocol with other forwarding devices, and the first forwarding device can parse the file format included in the control packet to implement the synchronous network state.

In the embodiment of the present invention, the first forwarding device may obtain the control packet including the network state information by using the following manner: the first forwarding device may receive the control packet sent by the controller (English: Controller). Alternatively, the first forwarding device may receive the control packet sent by the second forwarding device.

For example, the network status information is a network status of the second forwarding device. The network status of the second forwarding device may be an attribute of the second forwarding device. The attribute includes at least one of an intrinsic attribute of the second forwarding device, an attribute related to network protocol operation supported by the second forwarding device, and an attribute related to connection of the second forwarding device with another forwarding device. . The network status information may not be specifically limited in the embodiment of the present invention.

For example, the network protocol running related attributes supported by the second forwarding device may include: the second forwarding device is in an on state, the second forwarding device is in an off state, and the second forwarding device is in an overload state. At least one of the states.

For example, the attributes related to the connection of the second forwarding device to other devices may include: whether the connection is reachable, the cost required for the connection to reach, the connection is in an open state, the connection is in a closed state, and the connection is in an initialized state. at least one.

For example, if the first forwarding device and the second forwarding device belong to the same autonomous system (English: autonomous system, abbreviated as AS), the intrinsic attributes of the second forwarding device may include: An identity of the second forwarding device and an identifier of at least one port (English: interface) belonging to the second forwarding device. For example, the identity of the second forwarding device may include at least one of a name of the second forwarding device and an address of the second forwarding device. The address of the second forwarding device may be an Internet Protocol (IP) address or a Medium Access Control (MAC) address. The identification of the port may include at least one of a name and a port number of the port. This embodiment of the present invention does not specifically limit this. If the first forwarding device and the second forwarding device belong to different ASs, the eigenvalue of the second forwarding device may include: the identity of the second forwarding device and the second forwarding device At least one of an autonomous system path (English: autonomous system path, AS-PATH for short). This embodiment of the present invention does not specifically limit this.

102. The first forwarding device obtains the network state information from the control packet.

For example, after the first forwarding device obtains the control packet, the network state information may be parsed from the control packet according to a file format adopted by the network state information. If the network status information is in an XML format, the first forwarding device may parse the control message by using an XML Simple Application Programming Interface (XML: SAX). If the network status information adopts a JSON format, the first forwarding device may parse the control message by using a JSON parsing function (parseJSON) provided in a JavaScript library (jQuery) of a browser. The embodiment of the present invention may not specifically limit the manner in which the control message is parsed.

Optionally, the YANG data model language can describe the information in an XML format or a JSON format, and the Netconf protocol can parse the information described by the YANG data model language. If the network status information is encoded in the XML format or the JSON format by using the YANG data model language, the first forwarding device may use the Netconf protocol to parse the control message to obtain the network status information, that is, obtain the The attribute that the second forwarding device has.

Optionally, after 102, the method for synchronizing network status provided by the embodiment of the present invention further includes:

103. The first forwarding device updates the network state information database saved by the first forwarding device by using the network state information.

For example, the first forwarding device stores a network information information base (English: State Information Base, SIB for short). The network status information base may include a network status of a forwarding device capable of communicating with the first forwarding device for calculating a route of the first network device and other forwarding devices. The forwarding device capable of communicating with the first forwarding device includes a forwarding device in the same AS, and may also include a forwarding device in different ASs.

For example, the first forwarding device updates the network status information database, including: the first forwarding device determines whether the network status information database includes a first entry, and the first entry is used to record the previous time The attribute that the second forwarding device obtained when the network state is synchronized. If the network status information database includes the first entry, the first forwarding device replaces the attribute of the second forwarding device obtained when the previous network state synchronization is used by using the network status information. For example, the previous network state synchronization is relative to the current network state synchronization. That is, the network status information is an attribute of the second forwarding device obtained when the network status is synchronized. The updating, by the first forwarding device, the network status information database includes: the first forwarding device overwriting information recorded in the first entry by using the network state information, that is, recording in the updated first entry The attribute that the second forwarding device obtained by the current network state synchronization has. Thus, the process of synchronizing the network state of the second forwarding device in the embodiment of the present invention is completed.

Optionally, if the network status information database does not include the first entry, the first forwarding device updates the network status information database, where the first forwarding device creates a location according to the network status information. The first entry is described, that is, the network state information is written into the first entry.

In the method for synchronizing the network state provided by the embodiment of the present invention, the first forwarding device can support the parsing manner corresponding to the encoding mode of the network state information, so that the network state of different forwarding devices can be obtained, and the forwarding devices are omitted. During the negotiation of the private routing protocol, the success or failure of the synchronization network state is no longer dependent on the result of the negotiation of the routing protocol, which helps to improve the efficiency of synchronizing the network state.

The method shown in FIG. 1 shows a process in which the first forwarding device parses and obtains network state information from the control packet provided by the embodiment of the present invention. The method shown in FIG. 2 shows that the network device encodes network state information. The process of generating a control message provided by the embodiment of the present invention is generated.

The corresponding embodiment of FIG. 2 is a description of a method provided by an embodiment of the present invention from a device side that sends a network state. The device that sends the network status is the network device in FIG. 2. The network device may be a second forwarding device or a controller. The second forwarding device is capable of communicating with the first forwarding device Mutual equipment. The controller is a device capable of interacting with the second forwarding device and the first forwarding device. Referring to FIG. 2, a method for synchronizing network status according to an embodiment of the present invention includes:

201. The network device obtains network state information, where the network state information is used to indicate an attribute that the second forwarding device has.

For example, the network device is the Controller or the second forwarding device. If the network device is the second forwarding device, the second forwarding device may obtain network state information according to the information configured on the second forwarding device, where the information configured on the second forwarding device may include the second forwarding The properties that the device has. The attributes of the second forwarding device are the same as those of the second forwarding device in the embodiment corresponding to FIG. 1, and details are not described herein again. If the network device is the Controller, the Controller may interact with the second forwarding device to obtain the network state information represented by a file format from the second forwarding device. The file format is the same as the file format in the embodiment corresponding to FIG. 1, and details are not described herein again. Or the controller may obtain the information configured on the second forwarding device in the process of configuring the second forwarding device, and obtain the network state information.

202. The network device encodes the network state information into a file format, and obtains a control packet, where the control packet includes the network state information represented by the file format.

For example, the network device obtains the network state information of the second forwarding device when the network state is synchronized, and encodes the network state information into a file format, which is carried in the payload of the control packet. That is, the payload portion of the control message includes the network status information represented in the file format.

For example, the network device describes the network state information in a YANG language, and encodes the network state information into an XML format or a JSON format.

For example, if the network device is the Controller, the Controller may obtain a control message according to the network status information represented by the second forwarding device in a file format. Or the controller obtains the network status information, and encodes the network status information into a file format, such as an XML format or a JSON format. The controller carries the generated network state information represented by the file format in the control packet, such as the payload carried in the control packet.

For example, if the network device is the second forwarding device, the second forwarding device encodes the network state information into a file format, such as an XML format or a JSON format. The second forwarding device carries the generated network state information represented by the file format in the control packet, such as the payload carried in the control packet.

203. The network device sends the control packet to the first forwarding device.

For example, after the network device generates the control packet, the secure shell protocol (English: Secure Shell, referred to as SSH), the secure transport layer protocol (English: Transport Layer Security, TLS for short) or the transmission control may be adopted. The protocol (English: Transmission Control Protocol, referred to as TCP) sends the control message to the first forwarding device.

For example, the manner in which the network device sends the control packet to the first forwarding device may be any one of the following manners.

In a first mode, the network device sends the control packet to the first forwarding device in a point-to-point manner. In this way, the first forwarding device can obtain the control packet, and the other devices in the network do not receive the control packet sent by the network device. .

In a second mode, the network device sends a control packet to the at least one designated forwarding device in a point-to-multipoint manner, where the at least one designated forwarding device includes the first forwarding device. In this way, the at least one designated forwarding device can obtain the control message.

Manner 3: The network device broadcasts the control packet to a forwarding device in the network, where the control packet may be sent to the first forwarding device in the network. In this way, in addition to the first forwarding device, other forwarding devices in the network can also obtain the control message. Sending the control message in a broadcast manner helps to further improve the efficiency of synchronizing the network state.

Based on the method for encoding the network state information into the file format provided by the embodiment of the present invention, the development of the private routing protocol may be: setting the content of the network state information as needed. For example, the first forwarding device and the second forwarding device may be the same AS, and the first forwarding device and the second forwarding device may support the same private routing protocol, where the first forwarding is performed. The device and the second forwarding device can also support different private routing protocols. An embodiment of the present invention is described by using the second forwarding device to send the attributes of the second forwarding device to other forwarding devices in the network. Any one of the forwarding devices in the network, such as the first forwarding device. The method provided by the embodiment of the present invention can be used to synchronize the attributes that it has.

If the second forwarding device supports the third private routing protocol, the network status information may include the following attributes: an identity of the second forwarding device, an identifier of a port belonging to the second forwarding device, and the second forwarding. ID of the link corresponding to the device. If the first forwarding device supports the third private routing protocol, the network status information may include the following attributes: the identity of the first forwarding device, belonging to The identifier of the port of the first forwarding device and the identifier of the link corresponding to the first forwarding device. For example, the identity of the link can be the name of the link and/or the link code.

If the second forwarding device supports the fourth private routing protocol, the network status information may include the following attributes: an identity of the second forwarding device, an identifier of a port belonging to the second forwarding device, and the second forwarding. The working status of the device. If the first forwarding device supports the fourth private routing protocol, the network status information may include the following attributes: an identity of the first forwarding device, an identifier of a port that belongs to the first forwarding device, and the first forwarding. The working status of the device. For example, the working state may be one of startup (English: up), shutdown (English: down), overload (English: overload), and initialization (English: init).

For example, based on the YANG data model language encoding network state information, the network state information may be in a tree structure. Therefore, in the embodiment of the present invention, the development of the private routing protocol may be: setting the network state information including the attributes according to requirements. The affiliation. For example, in the fourth private routing protocol and the fifth private routing protocol, the network state information includes the same attribute. If the second forwarding device supports the fourth private routing protocol, the affiliation between the attributes included in the network status information includes: the identity of the second forwarding device is a root node, and the port belongs to the second forwarding device. The identifier of the second forwarding device and the working state of the second forwarding device are leaf nodes, that is, the identifier of the port and the working state may be located at the same level in a tree structure. If the fourth private protocol supported by the second forwarding device is updated, that is, updated to the fifth private routing protocol, the layer relationship between the attributes included in the network state information includes: the second forwarding device The identity of the second forwarding device is represented by a leaf node of the port of the second forwarding device, and the working state of the second forwarding device is a leaf node of the port identifier.

For example, if the first forwarding device supports the fifth private routing protocol, the affiliation relationship between the attributes included in the network state information includes: the identity of the first forwarding device is a root node, and belongs to the The identifier of the port of the first forwarding device is the leaf node of the identity of the first forwarding device, and the working state of the first forwarding device is the leaf node of the identifier of the port, that is, the identifier of the port and the work The states are at different levels in the tree structure.

For example, in the embodiment of the present invention, setting a layer relationship between the attributes may include setting a position of the attribute in the tree structure; or setting a layer relationship between the attributes may include creating a new tree shape. structure. For example, in the third private routing protocol and the sixth private routing protocol, the network state information includes the same attribute. In the third private routing protocol, the network status information includes attributes between The affiliation relationship includes: the identity of the device is the root node, and the identifier of the port belonging to the device and the identifier of the link corresponding to the device are leaf nodes, that is, the hierarchical relationship between the attributes is represented by a tree structure. . The device is a device that supports the third private routing protocol.

In the sixth private routing protocol, the affiliation relationship between the attributes included in the network state information is: the identity of the device is a root node in the first tree structure, and the identifier of the port belonging to the device is in the first The leaf structure is a leaf node, and the link identifier corresponding to the device is a root node in the second tree structure, and the port identifier of the device at both ends of the link is a leaf node in the second tree structure. The devices at both ends of the link include the device. For example, the second forwarding device supports the sixth private routing protocol, and the layer relationship between the attributes included in the network state information is: the identity of the second forwarding device is a root node in the first tree structure. The identifier of the port that belongs to the second forwarding device is a leaf node in the first tree structure, and the link identifier corresponding to the second forwarding device is a root node in the second tree structure, the chain The port identifiers of the devices at both ends of the road are leaf nodes in the second tree structure. The devices at both ends of the link include the second forwarding device.

Optionally, the multiple forwarding devices belong to the same AS, and the multiple forwarding devices include the first forwarding device and the second forwarding device. The network status information may further include the following attributes: a rate of the port. Speed), the observed rate of the port (English: observed-speed), the maximum available bandwidth of the link (English: Max-Link-Bandwidth), the maximum remaining bandwidth of the link (English: Max-Resv-Link- BW), the weight of the link, the maximum transmission unit (MTU) of the link, and the like, which are not specifically limited in this embodiment of the present invention.

Taking the YANG data model language encoding network status information as an example, for the sixth private routing protocol, the network status information of a forwarding device can be described as:

The identity of the forwarding device can be described as:

The identifier of the port belonging to the forwarding device can be described as:

The identifier of the link corresponding to the forwarding device can be described as:

According to the embodiment of the present invention, the network state information is encoded into a file format. When the private routing protocol is updated, the attributes included in the network state information may be updated. For example, updating the sixth private routing protocol, updating the identifier of the link to the leaf node of the identifier of the port in the first tree structure, and modifying the description for the link accordingly. For example, the sixth private routing protocol is updated, and new attributes are added, such as increasing the attribution of the forwarding device, and correspondingly adding a leaf node describing the attribution to the tree structure. For example, the home location of the forwarding device may be a leaf node of the identity of the forwarding device, and if the home location of the forwarding device is a global positioning system of the forwarding device (English: Global Positioning System, referred to as: GPS) coordinates, the attribution of the forwarding device can be described as:

In summary, the embodiment of the present invention encodes network state information into a file format, and also helps improve the flexibility of developing a private routing protocol.

Generally, the carrier network has the characteristics of wide coverage and complete functions. The developed private routing protocols are mostly adapted to the characteristics of the carrier network, and the routing protocol conforming to the characteristics of the carrier network is applied to the data center network. Many of the functions implemented by the protocol may not be required by the data center network, resulting in a waste of functionality. In addition, in order to adapt to such a routing protocol that conforms to the characteristics of the carrier network, the data center network may introduce unnecessary devices, causing waste of the device, increasing the complexity of the data center network, and possibly reducing the routing. The calculated forwarding path is reasonable. For this scenario, the enterprise network (English: Enterprise Network) client can use the solution of the embodiment of the present invention to develop a private routing protocol that conforms to the characteristics of the data center network, thereby helping to avoid function waste and device waste, and improve routing calculation. Sex.

The embodiment of the present invention further provides a first forwarding device, and the first forwarding device may be disposed on a forwarding device such as a router or a switch, which is not specifically limited in this embodiment of the present invention. The first forwarding device may perform the method provided by the embodiment corresponding to FIG. 1. Referring to the schematic diagram shown in FIG. 3, the first forwarding device may include:

The receiving unit 301 is configured to receive a control packet, where the control packet includes network state information represented by a file format, where the network state information is used to indicate an attribute that the second forwarding device has;

The obtaining unit 302 is configured to obtain the network state information from the control message received by the receiving unit.

Optionally, the first forwarding device may further include:

The updating unit 303 is configured to update the network state information library saved by the first forwarding device by using the network state information obtained by the obtaining unit.

Optionally, the file format is an XML format or a JSON format.

Optionally, the network state information is described in the YANG language, and the obtaining unit is specifically configured to use the network configuration Netconf protocol to parse the control packet received by the receiving unit to obtain the network state information.

Optionally, the receiving unit is configured to receive the control message from the controller; or the receiving unit is specifically configured to receive the control message from the second forwarding device.

The first forwarding device provided by the embodiment of the present invention can support the encoding mode of the network state information. The network state of different forwarding devices can be obtained by the parsing method. The process of negotiating private routing protocols between forwarding devices is omitted. The success or failure of the synchronization network state is no longer dependent on the result of routing protocol negotiation. Improve the efficiency of synchronizing network status.

The embodiment of the present invention further provides a network device, where the network device can be located on a device such as a controller, a router, or a switch, and the network device can also be disposed on the second forwarding device. The specific form of the network device is not specifically limited in this embodiment of the present invention. The network device may perform the method provided by the embodiment corresponding to FIG. 2. Referring to the schematic diagram shown in FIG. 4, the network device may include:

The first obtaining unit 401 is configured to obtain network state information, where the network state information is used to indicate an attribute that the second forwarding device has. For example, the first obtaining unit 401 can obtain network status information by using the method in the corresponding embodiment of FIG. 2, and details are not described herein again. The attributes of the second forwarding device are the same as those of the second forwarding device in the corresponding embodiment of FIG. 2, and details are not described herein again.

a second obtaining unit 402, configured to encode the network state information obtained by the first obtaining unit into a file format, to obtain a control packet, where the control packet includes the network state represented by the file format information. For example, the second obtaining unit 402 can obtain the control message by using the method in the corresponding embodiment of FIG. 2, and details are not described herein again. The control packet is the same as the control packet in the corresponding embodiment of FIG. 2, and details are not described herein again.

The sending unit 403 is configured to send the control packet to the first forwarding device. For example, the sending unit may send the control packet to the first forwarding device by using the method in the corresponding embodiment of FIG. 2, and details are not described herein again.

Optionally, the file format is an XML format or a JSON format.

Optionally, the second obtaining unit is specifically configured to describe the network state information by using another next-generation YANG language.

Correspondingly, the embodiment of the present invention further provides a first forwarding device, and the first forwarding device may be disposed on a forwarding device such as a router or a switch, which is not specifically limited in this embodiment of the present invention. The first forwarding device may perform the method provided by the embodiment corresponding to FIG. 1. Referring to the schematic diagram shown in FIG. 5, the first forwarding device may include: a processor 501, a memory 502, and a communication interface 503. The processor 501, the memory 502, and the communication interface 503 can be connected through a communication bus 504. The memory 502 is for storing a program, and the processor 501 executes executable instructions according to the program read from the memory 502. Perform specific actions.

Alternatively, the receiving unit 301 in FIG. 3 may be implemented by the communication interface 503 in FIG. 5. The obtaining unit 302 and the updating unit 303 in FIG. 3 may be implemented by the processor 501 in FIG. 5 according to executable instructions stored in the memory 502. Processor 501 can include at least one physical processor.

It should be noted that the first forwarding device shown in FIG. 3 and the first forwarding device shown in FIG. 5 may be the same device. It can be considered that FIG. 3 is a physical point of view showing content included in a first forwarding device. Figure 5 shows the content of a first forwarding device from a logical point of view.

In the first forwarding device shown in FIG. 5, the processor 501 is configured to read instructions and data stored in the memory 502, and perform the following operations:

The processor 501 receives, by using the communication interface 503, a control packet, where the control packet includes network state information represented by a file format, where the network state information is used to indicate an attribute of the second forwarding device;

The processor 501 obtains the network status information from the control message.

Optionally, the processor 501 further updates the network state information library saved by the first forwarding device by using the network state information.

For example, the file format is an XML format or a JSON format.

Optionally, the network status information is described in the YANG language, and the obtaining, by the processor 501, the network status information from the control message includes:

The processor 501 configures the Netconf protocol by using a network, parses the control packet, and obtains the network state information.

Optionally, the receiving, by the processor 501, the control packet by using the communication interface 503 includes:

The processor 501 receives the control message from the controller through the communication interface 503; or

The processor 501 receives the control message from the second forwarding device through the communication interface 503.

The embodiment of the present invention further provides a network device, which may be disposed on a device such as a controller, a router, or a switch, and is not specifically limited in this embodiment of the present invention. The network device may perform the method provided by the embodiment corresponding to FIG. 2. Referring to the schematic diagram shown in FIG. 6, the network device may include a processor 601, a memory 602, and a communication interface 603. Wherein, the processor 601 and the memory 602 And communication interface 603 can be connected by communication bus 604. The memory 602 is for storing programs, and the processor 601 performs specific operations in accordance with executable instructions included in the program read from the memory 602.

Alternatively, the first obtaining unit 401 and the transmitting unit 403 in FIG. 4 may be implemented by the communication interface 603 in FIG. 6, and the second obtaining unit 402 in FIG. 4 may be stored by the processor 601 in FIG. 6 according to the memory 602. The instructions are implemented, and the processor 601 can include at least one physical processor.

It should be noted that the network device shown in FIG. 4 and the network device shown in FIG. 6 may be the same device. It can be considered that FIG. 4 shows the content included in one network device from a physical point of view, and FIG. 6 A logically represented content of a network device is included.

In the network device shown in FIG. 6, the processor 601 is configured to read instructions and data stored in the memory 602, and perform the following operations:

The processor 601 obtains network status information by using the communication interface 603, where the network status information is used to indicate an attribute that the second forwarding device has;

The processor 601 encodes the network status information into a file format, and obtains a control message, where the control message includes the network status information represented by the file format;

The processor 601 sends the control packet to the first forwarding device through the communication interface 603.

For example, the file format is an XML format or a JSON format.

Optionally, the processor 601 encoding the network state information into a file format includes: the processor 601 describing the network state information in a YANG language.

Optionally, the network device is a controller or the second forwarding device.

It can be clearly understood by those skilled in the art that all or part of the above embodiments can be implemented by means of software plus a general hardware platform. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product, which may be stored in a storage medium such as a ROM/RAM or a disk. An optical disk or the like includes instructions for causing a computer device (which may be a personal computer, a server, or a network communication device such as a media gateway) to perform the methods described in various embodiments of the present invention or portions of the embodiments.

It is to be noted that the various embodiments in the present specification are described in a progressive manner, and the same similar parts between the various embodiments may be referred to each other, and each embodiment focuses on different embodiments from other embodiments. At the office. In particular, for the device and the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment. Take The apparatus and system embodiments described above are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie may be located A place, or it can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without any creative effort.

The above description is only an alternative embodiment of the present invention and is not intended to limit the scope of the present invention. It should be noted that a number of modifications and refinements may be made by those skilled in the art without departing from the principles of the invention, and such modifications and modifications are also considered to be within the scope of the invention.

Claims

A method for synchronizing network status, the method comprising:

The first forwarding device receives the control packet, where the control packet includes network state information represented by a file format, where the network state information is used to indicate an attribute of the second forwarding device;

The first forwarding device obtains the network status information from the control message.
The method of claim 1 further comprising:

The first forwarding device updates the network state information library saved by the first forwarding device by using the network state information.
The method according to claim 1 or 2, wherein the file format is an Extensible Markup Language (XML) format or a Javascript Object Markup Language (JSON) format.
The method according to any one of claims 1 to 3, wherein the network state information is described in another next-generation YANG language, and the first forwarding device obtains the network state from the control message. Information includes:

The first forwarding device uses the network configuration Netconf protocol to parse the control packet to obtain the network state information.
The method according to any one of claims 1 to 4, wherein the receiving, by the first forwarding device, the control message comprises:

The first forwarding device receives the control message from the controller, or the first forwarding device receives the control message from the second forwarding device.
A method for synchronizing network status, the method comprising:

The network device obtains network status information, where the network status information is used to indicate an attribute that the second forwarding device has;

The network device encodes the network state information into a file format, and obtains a control packet, where the control packet includes the network state information represented by the file format;

The network device sends the control packet to the first forwarding device.
The method of claim 6, wherein the file format is an Extensible Markup Language (XML) format or a Javascript Object Markup Language (JSON) format.
The method according to claim 6 or 7, wherein the encoding, by the network device, the network status information into a file format comprises:

The network device describes the network status information in another next-generation YANG language.
The method according to any one of claims 6 to 8, wherein the network device is a controller or the second forwarding device.
A first forwarding device, where the first forwarding device includes:

a receiving unit, configured to receive a control message, where the control message includes network state information represented by a file format, where the network state information is used to indicate an attribute of the second forwarding device;

And an obtaining unit, configured to obtain the network state information from the control message received by the receiving unit.
The first forwarding device according to claim 10, wherein the first forwarding device further comprises:

And an update unit, configured to update the network state information library saved by the first forwarding device by using the network state information obtained by the obtaining unit.
The first forwarding device according to claim 10 or 11, wherein the network state information is described by another next-generation YANG language.

The obtaining unit is specifically configured to configure the Netconf protocol by using a network, and parse the control packet received by the receiving unit to obtain the network state information.
A first forwarding device according to any one of claims 10 to 12, characterized in that

The receiving unit is specifically configured to receive the control message from the controller, or the receiving unit is specifically configured to receive the control message from the second forwarding device.
A network device, where the network device includes:

a first obtaining unit, configured to obtain network state information, where the network state information is used to indicate an attribute that the second forwarding device has;

a second obtaining unit, configured to encode the network state information obtained by the first obtaining unit into a file format, to obtain a control message, where the control message includes the network state information represented by the file format ;

And a sending unit, configured to send the control packet to the first forwarding device.
A network device according to claim 13 or 14, wherein

The second obtaining unit is specifically configured to describe the network state information by using another next-generation YANG language.