WO2022267969A1 - 一种信息传输方法及相关设备 - Google Patents
一种信息传输方法及相关设备 Download PDFInfo
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- WO2022267969A1 WO2022267969A1 PCT/CN2022/099059 CN2022099059W WO2022267969A1 WO 2022267969 A1 WO2022267969 A1 WO 2022267969A1 CN 2022099059 W CN2022099059 W CN 2022099059W WO 2022267969 A1 WO2022267969 A1 WO 2022267969A1
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 44
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
Definitions
- the embodiments of the present application relate to the communication field, and in particular, to an information transmission method and related equipment.
- Segment routing policy is a new tunnel drainage technology developed on the basis of segment routing (segment routing, SR) technology.
- SR Policy includes one or more candidate paths (candidate paths), among which The candidate path with the highest priority takes effect, and each candidate path also contains one or more segment lists (segment lists) composed of segment identifiers (segment ID, SID).
- SID segment identifier
- the segment identifier specifies the message from source to destination.
- the transmission path can instruct the message to follow the specified path to be transmitted in the network node.
- the method of delivering SR Policy to network nodes through the border gateway protocol (border gateway protocol, BGP) SR Policy address family is specified in detail. Specifically, define A new BGP subaddress family identifier (subsequent address family identifier, SAFI) network layer reachability information (network layer reachability information, NLRI), the BGP SAFI NLRI is used to publish a candidate path in the SR Policy, that is, based on the candidate path to deliver the SR Policy.
- the network nodes also need to use the SR Policy routing attribute based on the overall SR Policy.
- the overall SR Policy routing attribute can refer to the routing attribute shared by two or more contingent paths , for example: routing attributes such as BSID (Binding SID) and bidirectional forwarding detection (bidirectional forwarding detection, BFD). If these overall SR Policy routing attributes are still delivered through candidate paths, each candidate path that shares these overall SR Policy routing attributes will repeatedly carry the overall SR Policy routing attributes, resulting in packet redundancy. In addition, the SR Policy routing attributes used by individual candidate paths may be different from the overall SR Policy routing attributes, which will lead to information conflicts.
- the embodiment of the present application provides an information transmission method, a controller, and a network node, which are used to avoid problems of message redundancy and information conflict when delivering an SR Policy.
- the embodiment of the present application also provides a corresponding server and a computer-readable storage medium.
- the first aspect of the present application provides an information transmission method, including:
- the controller first obtains the SR Policy, the SR Policy includes a first SR Policy routing attribute and at least two candidate paths, wherein the first SR Policy routing attribute is a routing attribute for at least two candidate paths;
- the controller After the controller obtains the SR Policy, it can generate the first target message, wherein the first target message includes the routing attribute of the first SR Policy and the indicator set by the controller. After the controller sends the target message to the network node, the network The node can determine that the first SR Policy routing attribute is a routing attribute for at least two candidate paths according to the indication, that is, the first SR Policy routing attribute is a routing attribute shared by at least two candidate paths under the SR Policy.
- the controller obtains the SR Policy, wherein the SR Policy includes the first SR Policy routing attribute and at least two candidate paths, and the controller sets the indication flag in the target message, so that the network node can receive the target message according to This indicator determines that the first SR Policy routing attribute is a routing attribute for at least two candidate paths, because the first SR Policy routing attribute is issued separately, and there is no need to repeatedly carry these overall routing attributes when issuing SR Policy candidate paths , thus avoiding the problems of message redundancy and information conflict.
- the first target packet includes the NLRI type
- the controller adds the NLRI type in the first target packet as an indication identifier
- the controller may add an NLRI type in the first target message as an indicator, which improves the feasibility of the solution.
- the controller before sending the first target message to the network node, the controller also sends a first negotiation message to the network node, and the network node also sends a second negotiation message to the controller , so that the controller and the network node negotiate with each other whether to have the capability of adding an NLRI type.
- the controller adds the NLRI type in the first target message as an indicator, avoiding the need for the controller or
- the controller fails to set the indicator, which makes the network node unable to determine the purpose of the first SR Policy routing attribute, which improves the feasibility of the solution.
- the first target message includes an NLRI type
- the NLRI type includes a distinguisher field
- the controller sets a value of the distinguisher field in the first target message as an indicator.
- the controller may set the value of the discriminator field in the first target message as an indicator, which improves the feasibility of the solution.
- the SR Policy includes the first SR Policy routing attribute
- the controller may add a first routing sub-attribute at the same level as the first SR Policy routing attribute in the first target packet as an indicator.
- the controller may add a first routing sub-attribute in the first target packet as an indication identifier, which improves the feasibility of the solution.
- the first target packet includes a tunnel type field
- the controller may set a value of the tunnel type field in the first target packet as an indication.
- the controller may set the value of the tunnel type field in the first target message as an indicator, which improves the feasibility of the solution.
- the first target message does not include the candidate paths under the SR Policy, that is, the controller issues the routing attribute of the first SR Policy separately.
- the controller issues the first SR Policy routing attributes separately, and does not need to carry these first SR Policy routing attributes when subsequently delivering SR Policy candidate paths, thereby avoiding message redundancy and information conflicts The problem.
- the controller further sends a second target message to the network node, where the second target message includes the first candidate path among the at least two candidate paths.
- the controller in addition to separately delivering the first SR Policy routing attribute shared by at least two candidate paths of the SR Policy, the controller can also deliver the candidate paths separately, so that the entire SR Policy can be delivered, which improves the reliability of the solution. integrity.
- the second target packet also includes a second SR Policy routing attribute, wherein the second SR Policy routing attribute is a routing attribute for the first candidate path, and the second SR Policy routing attribute Not for the second candidate path in the at least two candidate paths, that is, the second SR Policy routing attribute is the routing attribute carried under the first candidate path.
- the candidate path also carries routing attributes, which improves the integrity of the solution.
- the controller before the controller sends the second target message to the network node, the controller also sets enabling information in the second target message, and the network node receives the second target message After the document, it can be determined whether the first candidate path uses the first SR Policy routing attribute according to the enabling information.
- the controller can set enabling information in the second target message, thereby controlling the first candidate path to use the first SR Policy routing attribute, the second SR Policy The policy routing attribute or not using the routing attribute, the controller can set different enabling information for different situations, which improves the selectivity of the solution.
- the first candidate path includes a second SR Policy routing attribute
- the controller may add a second route at the same level as the second SR Policy routing attribute in the second target message Sub-attributes are used as enabling information.
- the controller may add a second routing sub-attribute in the second target message as enabling information, which improves the feasibility of the solution.
- the first target message is a Border Gateway Protocol message, that is, the first target message is a BGP-based message.
- the communication protocol of the first target message is limited, which improves the feasibility of the solution.
- the first SR Policy routing attribute includes Binding SID or bidirectional forwarding detection, that is, the first SR Policy routing attribute can be BSID, or BFD, or BSID and BFD.
- the specific content of the first SR Policy routing attribute is limited, which improves the feasibility of the solution.
- the second aspect of the present application provides an information transmission method, including:
- the network node receives the first target message sent by the controller, wherein the first target message includes the first SR Policy routing attribute and the indicator set by the controller in the first target message, and the first SR Policy routing attribute is included in the SR Policy
- SR Policy also includes at least two candidate paths, and the first SR Policy routing attribute is a routing attribute for at least two candidate paths, that is, the first SR Policy routing attribute is provided for at least two candidate paths under SR Policy to share the route attribute;
- the network node After the network node receives the first target message, it can be determined according to the indicator that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes.
- the network node receives the first target message sent by the controller, wherein the first target message includes the first SR Policy routing attribute and the indicator set by the controller in the first target message, and the network node can according to The indicator determines that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes, that is, it is determined that the first SR Policy routing attributes are routing attributes for at least two candidate paths, because the first SR Policy routing attributes are Received separately, there is no need to repeatedly carry these overall routing attributes in the candidate paths of the subsequently received SR Policy, thereby avoiding the problems of message redundancy and information conflict.
- the first target packet includes the NLRI type
- the controller adds the NLRI type in the first target packet as an indication identifier.
- the network node After the network node receives the first target message, it can determine whether there is a newly added NLRI type in the first target message. If there is a newly added NLRI type in the first target message, the network node can determine at least two NLRI types under SR Policy.
- the routing attribute of a candidate path is the first SR Policy routing attribute, that is, it is determined that the first SR Policy routing attribute is the routing attribute for at least two candidate paths.
- the controller can add an NLRI type in the first target message as an indicator, and correspondingly, the network node can determine whether there is a newly added NLRI type in the first target message, so as to determine the SR
- the routing attribute of at least two candidate paths under the Policy is the first SR Policy routing attribute, which improves the feasibility of the solution.
- the controller before the network node receives the first target message sent by the controller, the controller will send the first negotiation message to the network node, and the network node will also send the second target message to the controller.
- the negotiation message enables the controller and the network node to negotiate with each other whether to have the capability of adding an NLRI type.
- the controller adds the NLRI type in the first target message as an indicator, avoiding the need for the controller or
- the controller fails to set the indicator, which makes the network node unable to determine the purpose of the first SR Policy routing attribute, which improves the feasibility of the solution.
- the first target packet includes an NLRI type, and the NLRI type includes a distinguisher field
- the controller sets a value of the distinguisher field in the first target packet as an indicator.
- the network node can judge whether the value of the discriminator field is the first preset value; if the value of the discriminator field is the first preset value, the network node determines at least two candidate paths under the SR Policy
- the routing attribute is the first SR Policy routing attribute, that is, it is determined that the first SR Policy routing attribute is the routing attribute for at least two candidate paths.
- the controller may set the value of the discriminator field in the first target message as an indicator, and correspondingly, the network node may determine whether the value of the discriminator field in the first target message is the first The preset value, thereby determining that the routing attribute of at least two candidate paths under the SR Policy is the first SR Policy routing attribute, which improves the feasibility of the scheme.
- the SR Policy includes the first SR Policy routing attribute
- the controller may add a first routing sub-attribute at the same level as the first SR Policy routing attribute in the first target packet as an indicator.
- the network node After the network node receives the first target message, it can determine whether there is a first routing sub-attribute in the first target message; if there is a first routing sub-attribute in the first target message, the network node determines at least two The routing attribute of the candidate path is the first SR Policy routing attribute, that is, it is determined that the first SR Policy routing attribute is the routing attribute for at least two candidate paths.
- the controller may add a first routing sub-attribute in the first target message as an indicator, and correspondingly, the network node may determine whether the first routing sub-attribute exists in the first target message, Thereby it is determined that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes, which improves the feasibility of the scheme.
- the first target packet includes a tunnel type field
- the controller may set a value of the tunnel type field in the first target packet as an indication.
- the network node After the network node receives the first target message, it can determine whether the value of the tunnel type field is the second preset value; if the value of the tunnel type field is the second preset value, the network node determines at least two candidate paths under the SR Policy
- the routing attribute is the first SR Policy routing attribute, that is, it is determined that the first SR Policy routing attribute is the routing attribute for at least two candidate paths.
- the controller may set the value of the tunnel type field in the first target packet as an indicator, and correspondingly, the network node may determine whether the value of the tunnel type field is the second preset value, thereby determining
- the routing attribute of at least two candidate paths under the SR Policy is the first SR Policy routing attribute, which improves the feasibility of the solution.
- the first target message does not include the candidate paths under the SR Policy, that is, the network node is the first SR Policy routing attribute delivered by the independent receiving controller.
- the network node alone receives the first SR Policy routing attribute issued by the controller, and the candidate paths of the SR Policy subsequently received by the network node do not need to carry these first SR Policy routing attributes, thereby avoiding the message Problems with redundancy and conflicting information.
- the network node also receives a second target message sent by the controller, where the second target message includes the first candidate path among at least two candidate paths; at the network node After receiving the first target message and the second target message, the first NLRI type of the first target message and the second NLRI type of the second target message can be obtained; when the first NLRI type is similar to the second NLRI type At the same time, the network node determines that the routing attribute of the first candidate path is the first SR Policy routing attribute, that is, the first SR Policy routing attribute is provided to the first candidate path for use.
- the network node in addition to receiving the first SR Policy routing attribute shared by at least two candidate paths of the SR Policy delivered by the controller alone, the network node will also receive the candidate paths delivered by the controller separately, and in the first After the SR Policy routing attributes and candidate paths are received, the routing attributes are associated according to the NLRI types of the first target message and the second target message, so that the entire SR Policy is delivered and the integrity of the solution is improved.
- the second target packet also includes a second SR Policy routing attribute, wherein the second SR Policy routing attribute is a routing attribute for the first candidate path, and the second SR Policy routing attribute Not for the second candidate path in the at least two candidate paths, that is, when the network node receives the first SR Policy routing attribute and the first candidate path, and the first candidate path also carries the second SR Policy routing attribute, the network node It may be determined that the routing attribute of the first candidate path is the first SR Policy routing attribute or the second SR Policy routing attribute.
- the network node can select the first candidate path to use the second SR Policy routing attribute carried by itself or the first SR Policy route issued by the controller alone Attribute, which improves the selectivity of the scheme.
- the controller sets enabling information in the second target message, where the enabling information is used to indicate whether the first candidate path uses the first SR Policy routing attribute, and the network node
- the routing attribute of the first candidate path can be determined according to the enabling information, that is, the network node can control the candidate path to use the first SR Policy routing attribute, the second SR Policy routing attribute or not use the routing attribute.
- the network node can control the first candidate path to use the first SR Policy routing attribute, The second SR Policy routing attribute or not using the routing attribute improves the selectivity of the solution.
- the first candidate path includes a second SR Policy routing attribute
- the controller may add a second route at the same level as the second SR Policy routing attribute in the second target message
- the sub-attribute is used as enabling information, wherein the value of the second routing sub-attribute is used to indicate the routing attribute in the first SR Policy routing attribute.
- the network node After receiving the second target message, the network node can determine whether there is The second routing sub-attribute; if there is a second routing sub-attribute in the second target message, the network node can determine that the routing attribute of the first candidate path does not include the first SR Policy routing attribute indicated by the value of the second routing sub-attribute, namely The network node may control the first SR Policy routing attribute of the unused portion of the first candidate path.
- the controller can add a second routing sub-attribute in the second target message as enabling information, and the network node can control the first SR Policy routing attribute of the unused part of the first candidate path to improve the feasibility of the scheme.
- the first target message is a Border Gateway Protocol message, that is, the first target message is a BGP-based message.
- the communication protocol of the first target message is limited, which improves the feasibility of the solution.
- the first SR Policy routing attribute includes Binding SID or bidirectional forwarding detection, that is, the first SR Policy routing attribute can be BSID, or BFD, or BSID and BFD.
- the specific content of the first SR Policy routing attribute is limited, which improves the feasibility of the solution.
- the third aspect of the present application provides a controller, including:
- An acquisition unit configured to acquire a segment routing strategy SR Policy, the SR Policy including a first SR Policy routing attribute and at least two candidate paths;
- a sending unit configured to send a first target message to a network node, where the first target message includes an indication identifier and the routing attribute of the first SR Policy, and the indication identifier is used to instruct the network node to determine the first SR Policy
- An SR Policy routing attribute is a routing attribute for the at least two candidate paths.
- the controller in the third aspect of the present application executes the method in the first aspect of the present application or in any possible implementation manner of the first aspect.
- the fourth aspect of the present application provides a network node, including:
- the receiving unit is used to receive the first target message sent by the controller, the first target message includes a first SR Policy routing attribute and an indication identifier, and the first SR Policy routing attribute is included in the SR Policy;
- a determining unit configured to determine, according to the indication, that the routing attributes of at least two candidate paths under the SR Policy are the routing attributes of the first SR Policy.
- the network node in the fourth aspect of the present application executes the method in the second aspect of the present application or any possible implementation manner of the second aspect.
- the fifth aspect of the present application provides a controller, including:
- a processor, a communication interface, and a memory the memory is used to store program codes, and the processor is used to call the program codes in the memory so that the controller executes the first aspect or any possible implementation of the first aspect method in .
- the sixth aspect of the present application provides a network node, including:
- a processor, a communication interface, and a memory the memory is used to store program codes, and the processor is used to call the program codes in the memory so that the network node executes any possible method of the second aspect or the second aspect of the present application method in the implementation.
- a seventh aspect of the present application provides a computer-readable storage medium, including instructions, and when the instructions are run on a computer, the computer executes the method in the first aspect or any possible implementation manner of the first aspect.
- the eighth aspect of the present application provides a computer-readable storage medium, including instructions, and when the instructions are run on a computer, the computer executes the method in the second aspect or any possible implementation manner of the second aspect.
- the ninth aspect of the present application provides a computer program product that stores one or more computer-executable instructions.
- the processor executes any of the possible implementations of the above-mentioned first aspect or the first aspect. Methods.
- the tenth aspect of the present application provides a computer program product that stores one or more computer-executable instructions.
- the processor executes any of the above-mentioned second aspect or any possible implementation of the second aspect. Methods.
- the eleventh aspect of the present application provides a chip system, the chip system includes at least one processor and an interface, the interface is used to receive data and/or signals, and at least one processor is used to support the computer device to implement the above first aspect or the first aspect
- the system-on-a-chip may further include a memory, and the memory is used for storing necessary program instructions and data of the computer device.
- the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
- the twelfth aspect of the present application provides a chip system, the chip system includes at least one processor and an interface, the interface is used to receive data and/or signals, and the at least one processor is used to support the computer device to implement the above-mentioned second aspect or the first The functions involved in any possible implementation of the second aspect.
- the system-on-a-chip may further include a memory, and the memory is used for storing necessary program instructions and data of the computer device.
- the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
- Figure 1 is a schematic diagram of a framework for issuing SR Policy by network nodes in the network
- FIG. 2 is a schematic structural diagram of a network node provided by an embodiment of the present application.
- FIG. 3 is another schematic structural diagram of a network node provided by an embodiment of the present application.
- Figure 4 is a schematic diagram of the structure of SR Policy
- FIG. 5 is a schematic diagram of an embodiment of an information transmission method provided by an embodiment of the present application.
- Fig. 6 is a schematic structural diagram of the first SR Policy routing information provided by the embodiment of the present application.
- FIG. 7 is a schematic diagram of another embodiment of the information transmission method provided by the embodiment of the present application.
- FIG. 8 is a TLV format diagram of the newly added NLRI type provided by the embodiment of the present application.
- Fig. 9 is another schematic structural diagram of the first SR Policy routing information provided by the embodiment of the present application.
- FIG. 10 is a schematic diagram of another embodiment of the information transmission method provided by the embodiment of the present application.
- FIG. 11A is a schematic structural diagram of the first negotiation message provided by the embodiment of the present application.
- FIG. 11B is a TLV format diagram of an optional parameter in the first negotiation message provided by the embodiment of the present application.
- FIG. 12 is a TLV format diagram of another optional parameter in the first negotiation message provided by the embodiment of the present application.
- FIG. 13 is a schematic diagram of another embodiment of the information transmission method provided by the embodiment of the present application.
- FIG. 14 is a TLV format diagram of the NLRI type provided by the embodiment of the present application.
- FIG. 15 is a schematic diagram of another embodiment of the information transmission method provided by the embodiment of the present application.
- Fig. 16 is another schematic structural diagram of the first SR Policy routing information provided by the embodiment of the present application.
- FIG. 17 is a TLV format diagram of the newly added first routing sub-attribute provided by the embodiment of the present application.
- FIG. 18 is a schematic diagram of another embodiment of the information transmission method provided by the embodiment of the present application.
- Fig. 19 is another schematic structural diagram of the first SR Policy routing information provided by the embodiment of the present application.
- FIG. 20 is a schematic diagram of another embodiment of the information transmission method provided by the embodiment of the present application.
- FIG. 21 is a schematic diagram of another embodiment of the information transmission method provided by the embodiment of the present application.
- Fig. 22 is a schematic diagram of another embodiment of the information transmission method provided by the embodiment of the present application.
- FIG. 23 is a schematic diagram of another embodiment of the information transmission method provided by the embodiment of the present application.
- FIG. 24 is a schematic structural diagram of the second SR Policy routing information provided by the embodiment of the present application.
- Fig. 25 is a schematic structural diagram of the controller provided by the embodiment of the present application.
- Fig. 26 is another structural schematic diagram of the controller provided by the embodiment of the present application.
- FIG. 27 is a schematic structural diagram of a network node provided by an embodiment of the present application.
- FIG. 28 is another schematic structural diagram of a network node provided by an embodiment of the present application.
- Fig. 29 is another structural schematic diagram of the controller provided by the embodiment of the present application.
- FIG. 30 is another schematic structural diagram of a network node provided by an embodiment of the present application.
- the embodiment of the present application provides an information transmission method and related equipment, which are used to avoid the problems of redundant SR Policy messages and information conflicts delivered by the controller.
- the network may be a routing network
- the network includes a controller and multiple network nodes
- the controller is an independent controller, specifically a computer
- the network node may be regarded as a forwarding device
- the forwarding device may specifically be a router or a switch.
- the network node may include a main control board 210 and an interface board 220, the main control board 210 and the interface board 220 are connected, the main control board 210 includes a first processor 211 and a first memory 212, the first Processor 211 is connected to first memory 212, interface board 220 includes second processor 221, second memory 222 and interface card 223, second processor 221 is connected to second memory 222, second memory 222 is connected to interface card 223 .
- the first processor 211 is used to call the program instructions in the first memory 212 to execute corresponding processing functions
- the second processor 221 is used to call the program instructions in the second memory 222 to execute receiving and sending of messages
- the interface card 223 Used to connect with external devices to receive data.
- a network node may include a transceiver 302 , a processor 301 , a memory 303 and a bus 304 .
- the transceiver 302 is used to receive and send messages
- the memory 303 is used to store program instructions
- the processor 301 is used to call the program instructions in the memory 303 to perform corresponding processing functions.
- the controller After the controller receives the user request, it will collect the network topology according to the user request. Specifically, the controller will establish a BGP-LS (BGP Link-state) neighbor with one or more network nodes in the network , the network includes network node P1, network node P2, network node PE1, network node PE2, network node PE3, network node PE4, network node CE1 and network node CE2.
- BGP-LS BGP Link-state
- SR Policy can be based on Internet protocol version 4 (internet protocol version 4, IPv4) or Internet protocol version 6 (internet protocol version 6, IPv6), and SR Policy can be represented as SRv4Policy or SRv6Policy at this moment.
- SR Policy includes one or more candidate paths (candidate path), and each candidate path can include a priority (Preference ), the candidate path with the highest priority takes effect, and each candidate path can have routing attributes.
- the routing attributes of candidate paths can include BSID (Binding SID) and policy name (Policy Name), etc., and can also include bidirectional forwarding detection (bidirectional Forwarding detection, BFD), and each candidate path also contains one or more segment lists (segment list) composed of segment identifiers (segment ID, SID) and the weight of the segment list (Weight), the segment identifier specifies the report
- the transmission path of the message can instruct the message to follow the specified path to be transmitted in the network node.
- An embodiment of the information transmission method provided in the embodiment of the present application includes:
- the controller obtains the SR Policy.
- the controller is responsible for collecting the SR Policy required by the user through network topology calculation.
- the SR Policy includes the first SR Policy routing attribute and at least two candidate paths, that is, the SR Policy includes at least the second An SR Policy routing attribute, a first candidate path, and a second candidate path.
- the SR Policy may also include a third candidate path, a fourth candidate path, etc., which are not limited in this embodiment of the present application.
- the first SR Policy routing attribute includes Binding SID or Bidirectional Forwarding Detection (BFD), that is, the first SR Policy routing attribute may only include Binding SID, may only include BFD, may also include Binding SID and BFD, and Binding SID Both BFD and BFD are used to provide common routing attributes for all candidate paths under the SR Policy.
- Binding SID or Bidirectional Forwarding Detection (BFD)
- BFD Bidirectional Forwarding Detection
- the controller sends the first target packet to the network node.
- the controller Before the controller sends the first target message to the network node, it will also establish a BGP neighbor with the network node. Specifically, the controller includes the SR Policy address family based on BGP. When the network nodes in the network also include the SR Policy address based on BGP family, the controller will establish a BGP neighbor with it, that is, a BGP SR Policy neighbor. Referring to Figure 1, the controller and network node PE3 have established a BGP SR Policy neighbor. It should be noted that in the embodiment of this application, the control Taking the controller delivering the SR Policy to a network node as an example, the steps and methods for the controller delivering the SR Policy to other network nodes are the same, and will not be repeated in this embodiment of the application.
- the controller can generate the first destination message before or after establishing a BGP neighbor relationship with the network node, where the first destination message is a BGP message, please refer to the protocol number draft-ietf-idr-segment-routing-te-policy-13 , referring to Fig. 6 together, the first target message includes the first SR Policy routing information, includes attribute (Attributes) and NLRI type in the first SR Policy routing information, and attribute includes the first SR Policy routing attribute, the first SR Policy routing The attributes only include the routing attributes at the SR Policy level, not the candidate paths under the SR Policy.
- the routing attributes at the SR Policy level can be understood as the routing attributes used by the entire SR Policy, that is, routing attributes such as Binding SID and SRv6Binding SID are provided Routing attributes commonly used by all candidate paths under the SR Policy.
- the controller also sets an indication flag in the first target message, and the indication flag is used to instruct the network node to determine that the first SR Policy routing attribute is a routing attribute for at least two candidate paths, that is, to inform the network node that the first SR Policy Policy routing information is used to provide common routing attributes for all candidate paths under the SR Policy. It should be noted that, because the first SR Policy routing attribute does not include the candidate paths under the SR Policy, the first target packet also does not include the candidate paths under the SR Policy.
- the network node determines, according to the indication identifier, that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes.
- the network node After the network node receives the first target message, it can determine that the routing attribute used by the candidate path under the SR Policy is the first SR Policy routing attribute according to the indicator in the first target message, and the network node subsequently receives the control After the candidate path under the SR Policy sent by the router, when the network node uses a certain candidate path to perform forwarding data packets, the routing attribute used by the candidate path is the first SR Policy routing attribute.
- the controller obtains the SR Policy, wherein the SR Policy includes the first SR Policy routing attribute and at least two candidate paths, and the controller sets the indicator in the target message so that the network node can receive the target message
- the first SR Policy routing attribute is a routing attribute for at least two candidate paths, because the first SR Policy routing attribute is issued separately, and these overall routing attributes do not need to be carried when subsequently issuing SR Policy candidate paths , thus avoiding the problems of message redundancy and information conflict.
- the indicator set by the controller in the first target message can be in various forms, which are described below:
- FIG. 7 another embodiment of the information transmission method in the embodiment of the present application includes:
- the controller obtains the SR Policy.
- the controller sends the first target packet to the network node.
- the network node judges whether there is a newly added NLRI type in the first target packet.
- the network node determines that the routing attributes of at least two candidate paths under the SR Policy are the routing attributes of the first SR Policy.
- the first SR Policy routing information includes the first SR Policy routing attribute and the NLRI type
- the controller can add a new NLRI type in the first SR Policy routing information, and the newly added NLRI type includes 8 bits NLRI length (NLRI Length), 32-bit color (Policy Color) and 32-bit or 128-bit endpoint (Endpoint), please refer to Figure 9, the newly added NLRI type is represented by Policy in the first SR Policy routing information Composed of Color and Endpoint.
- the network node After the network node receives the first target message, it can determine whether there is a newly added NLRI type in the first target message. If there is a newly added NLRI type, it is determined that the routing attribute used by the candidate path under the SR Policy is the first SR Policy routing attribute.
- the controller may add an NLRI type in the first target message. After the network node receives the first target message, it may determine whether there is a newly added NLRI type in the first target message. The newly added NLRI type determines that the routing attribute used by the candidate path under the SR Policy is the first SR Policy routing attribute, which improves the feasibility of the solution.
- FIG. 10 Another embodiment of the information transmission method provided by the embodiment of the present application includes:
- the controller obtains the SR Policy.
- the controller sends the first negotiation message to the network node.
- the controller sends the first target message to the network node.
- the network node judges whether there is a newly added NLRI type in the first target packet.
- the network node determines that the routing attributes of at least two candidate paths under the SR Policy are the routing attributes of the first SR Policy.
- the controller and the network node can negotiate with each other to obtain whether the other party has the ability to support the newly added NLRI type.
- the protocol number RFC 4271 please refer to the protocol number RFC 4271, and refer to Figure 11A together.
- the first negotiation message is a BGP Open message, and the first negotiation message includes My Autonomous System (My Autonomous System), Hold Time (Hold Time), and BGP identification character (BGP Identifier) and optional parameter list (Optional Parameters), etc., each optional parameter in the optional parameter list is a TLV (type-length-value) format unit, refer to Figure 11B, optional parameters Including parameter type (Parm.Type), parameter length (Parm.Length) and parameter value (Parameter Value), in the embodiment of this application, please refer to the protocol number RFC 3392, see Figure 12, optional parameters include capability parameters, capability parameters Including 8-bit capability code (Capability Code), 8-bit capability length (Capability Length) and variable-length capability value (Capability Value), the controller adds NLRI capability code to the capability code, and NLRI capability code is used to indicate Whether the neighbor capability has the capability to support the newly added NLRI type, the capability value can be set to 0/1 to indicate, if the capability value is 1, it means that it has
- the controller after the controller and the network node negotiate with each other to have the ability to add the NLRI type, the controller then adds the NLRI type in the first target message as an indicator, avoiding the need for the controller or the network node to When the ability to add NLRI types is not available, the controller fails to set the indicator, which makes the network node unable to determine the purpose of the first SR Policy routing attribute, which improves the feasibility of the embodiment of the present application.
- FIG. 13 another embodiment of the information transmission method in the embodiment of the present application includes:
- the controller obtains the SR Policy.
- the controller sends the first target packet to the network node.
- the network node judges whether the value of the identifier field is a first preset value.
- the network node determines that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes.
- the first SR Policy routing information includes the first SR Policy routing attribute and NLRI type
- the NLRI type includes an 8-bit NLRI length (NLRI Length), a 32-bit distinguisher field (Distinguisher), and a 32-bit color (Policy Color) and 32-bit or 128-bit endpoint (Endpoint), where Distinguisher is used to distinguish different candidate paths, and the controller can set the value indicating the identifier as the distinguisher field, for example, set the value of Distinguisher equal to 0xFFFF FFFF.
- the network node After the network node receives the first target message, it can determine the value of the NLRI type identifier field in the first target message. If the value of the identifier field is 0xFFFF FFFF, then determine the routing attribute used by the candidate path under the SR Policy Routing attribute for the first SR Policy.
- the controller can set the value of the discriminator field in the first target message to the first preset value, and after receiving the first target message, the network node can determine whether the discriminator field in the first target message Whether the value of the field is the first preset value, if the value of the discriminator field is the first preset value, then it is determined that the routing attribute used by the candidate path under the SR Policy is the first SR Policy routing attribute, which improves the embodiment of the present application of realizability.
- FIG. 15 another embodiment of the information transmission method in the embodiment of the present application includes:
- the controller obtains the SR Policy.
- the controller sends the first target message to the network node.
- the network node judges whether the first routing sub-attribute exists in the first target packet
- the network node determines that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes.
- the first SR Policy routing information includes the first SR Policy routing attribute and NLRI type
- the controller can add a first SR Policy routing sub-attribute in the first SR Policy routing attribute
- the first SR Policy routing attributes include Binding SID, SRv6Binding SID, Policy Name (Policy Name), and BFD Information (BFD Info) and other routing attributes. These routing attributes are routing attributes used by candidate paths under SR Policy, that is, Policy-level Overall Policy routing attribute, the controller can add the first routing sub-attribute Global Policy Identifier in the first SR Policy routing attribute, please refer to Figure 17, Global Policy Identifier includes type (Type), length (Length), identifier (Identifier ) and reserved blocks (RESERVED).
- the network node After the network node receives the first target message, it can judge whether there is a new Global Policy Identifier in the first SR Policy routing attribute of the first target message, or judge whether the value of the Global Policy Identifier is 1, if there is a new Global Policy Identifier of , or the value of Global Policy Identifier is 1, then it is determined that the routing attribute used by the candidate path under the SR Policy is the first SR Policy routing attribute.
- the controller may add the first routing sub-attribute of SR Policy in the first target message, and after the network node receives the first target message, it may determine whether the first target message exists in the first target message. Routing sub-attribute, if there is the first routing sub-attribute in the first target message, then determine that the routing attribute used by the candidate path under SR Policy is the first SR Policy routing attribute, which improves the realizability of the embodiment of the present application.
- the controller obtains the SR Policy.
- the controller sends the first target packet to the network node.
- the network node judges whether the value of the tunnel type field is the second preset value
- the network node determines that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes.
- the first SR Policy routing information includes the NLRI type and attribute fields (Attributes), and the attribute fields (Attributes) include the tunnel encapsulation attribute field (Tunnel Encaps Attributes), the tunnel type field (Tunnel Type) and the first SR Policy Routing attribute, where the value of Tunnel Type is SR Policy, the controller can set the value indicating the tunnel type field, such as setting the value of Tunnel Type as Entire SR Policy, after the network node receives the first target message, it can judge the first The value of Tunnel Type in the target message, if the value of Tunnel Type is Entire SR Policy, then determine that the routing attribute used by the candidate path under SR Policy is the first SR Policy routing attribute.
- the controller can set the tunnel type field in the first target message to the second preset value, and after receiving the first target message, the network node can determine whether the tunnel type field in the first target message is It is the second preset value, if the value of the tunnel type field is the second preset value, then it is determined that the routing attribute used by the candidate path under the SR Policy is the first SR Policy routing attribute, which improves the feasibility of the scheme.
- the controller can set the indicator in the above four ways, which improves the feasibility of the embodiment of the present application.
- the controller in addition to sending the first target message to the network node, the controller will also send the second target message carrying the candidate path, please refer to Figure 20, another information transmission method in the embodiment of the present application Examples include:
- the controller obtains the SR Policy.
- the controller sends the first target packet to the network node.
- the network node determines that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes according to the indication identifier.
- the controller sends the second target message to the network node.
- the network node acquires the first NLRI type of the first target message and the second NLRI type of the second target message;
- the network node determines that the routing attribute of the first candidate path is the first SR Policy routing attribute.
- the SR Policy includes the first SR Policy routing attribute and at least two candidate paths. Therefore, in addition to sending the first target message to the network node, the controller will also deliver the second target message carrying the candidate path.
- the second target The packet includes at least one candidate path, that is, the first candidate path among the at least two candidate paths.
- the controller also sends a third target message to the network node, where the third target message includes the second candidate path among the at least two candidate paths, and at this time, the network node
- the priority determines the candidate path used, and both the first candidate path and the second candidate path use the first SR Policy routing attribute as the routing attribute during application.
- the controller may continue to send the fourth target message including the third candidate path, the fifth target message including the fourth candidate path, and so on to the network node.
- the network node After the network node receives the first target message sent by the controller, it can determine that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes according to the indicator in the first target message, and the network node receives After the first target message and the second target message are sent by the controller, the first NLRI type of the first target message and the second NLRI type of the second target message can be obtained. When the first NLRI type and the second When the NLRI types are the same, the network node determines that the routing attribute of the first candidate path is the first SR Policy routing attribute. Specifically, the network node acquires the colors and endpoints in the first NLRI type and the colors and endpoints in the second NLRI type.
- the network The node can then determine that the routing attribute of the first candidate path is the first SR Policy routing attribute, thereby completing the SR Policy deployment of the first candidate path of the network node.
- the candidate paths of the SR Policy are delivered to each network node , the deployment of SR Policy is completed.
- the network node PE3 After the network node PE3, the network node P2 and the network node PE1 receive the first target message and the second target message sent by the controller, the network node PE3 will receive the data according to The indication of the first candidate path and the first SR Policy routing attribute transmits the data to the network node P2 and the network node PE1 in sequence.
- step 2004 may be performed before or after step 2002, which is not limited in this embodiment of the present application.
- the controller in addition to delivering the first SR Policy routing attribute to the network node, the controller will also deliver candidate paths, so that the entire SR Policy is delivered, which improves the integrity of the embodiment of the application.
- the candidate path issued by the controller itself also carries routing attributes
- another embodiment of the information transmission method in the embodiment of the present application includes:
- the controller obtains the SR Policy.
- the controller sends the first target message to the network node.
- the network node determines, according to the indication identifier, that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes.
- the controller sends the second target packet to the network node.
- the network node acquires the first NLRI type of the first target message and the second NLRI type of the second target message;
- the network node determines that the routing attribute of the first candidate path is the first SR Policy routing attribute or the second SR Policy routing attribute.
- the second SR Policy routing attribute is the routing attribute for the first candidate path, and the second SR Policy routing attribute is not for the second candidate path among the at least two candidate paths, that is, the first candidate path itself also carries a candidate path-level route Attribute, this routing attribute is only used to provide the first candidate path.
- the first candidate path can be selected to use the first SR Policy routing attribute or the second SR Policy routing attribute, which is not limited in this embodiment of the present application.
- the candidate paths issued by the controller to the network nodes themselves also carry routing attributes, which improves the integrity of the embodiments of the present application.
- the controller can also set enabling information in the second target message before sending the second target message. Please refer to FIG. 22.
- Another embodiment of the information transmission method in the embodiment of the present application includes:
- the controller obtains the SR Policy.
- the controller sends the first target packet to the network node.
- the network node determines, according to the indication identifier, that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes.
- the controller sets enabling information in the second target packet.
- the controller sends the second target packet to the network node.
- the network node determines the routing attribute of the first candidate path according to the enabling information.
- enabling information can also be set in the second target message, and the enabling information is used to indicate whether the first candidate path uses the routing attribute of the first SR Policy, that is, the routing attribute under the SR Policy
- the candidate path can choose to use the first SR Policy routing attribute in the first target message, or choose not to use the first SR Policy routing attribute in the first target message.
- the controller can set enabling information so that the first candidate path does not use the first SR Policy routing attribute, but uses the second SR Policy carried by itself routing properties.
- the controller may also set enabling information so that the first candidate path does not use the first SR Policy routing attribute, thereby not using the routing attribute.
- the controller can set enabling information so that the first candidate path uses the first SR Policy routing attribute, Instead of using the second SR Policy routing attribute carried by itself.
- the controller can also set enabling information so that the first candidate path uses the first SR Policy routing attribute.
- the network node may obtain the enabling information in the second target message, and then determine the routing attribute of the first candidate path according to the enabling information.
- the enabling information indicates that the first candidate path uses BFD in the routing attribute of the first SR Policy
- the second target packet includes the routing attribute of the second SR Policy
- the routing attribute of the second SR Policy includes the Binding SID.
- the routing attribute used by the network node to set the first candidate path is the BFD in the first SR Policy routing attribute and the Binding SID of the second SR Policy routing attribute.
- the enabling information indicates that the first candidate path uses BFD in the routing attribute of the first SR Policy, and the second target packet includes the routing attribute of the second SR Policy, and the routing attribute of the second SR Policy includes BFD.
- the network The routing attribute used by the node to set the first candidate path is the BFD in the first SR Policy routing attribute.
- the enabling information indicates that the first candidate path does not use the first SR Policy routing attribute, and the second target message includes the second SR Policy routing attribute, and at this time the network node sets the first candidate path to use the second SR Policy routing properties.
- the controller may also set enabling information in the second target message before sending the second target message, so that the network node can determine the routing attribute of the first candidate path according to the enabling information, wherein the enabling The information can be selected according to the user's needs, so the user can decide whether a certain candidate path in the SR Policy uses a certain routing attribute in the first SR Policy routing attribute, which improves the selectivity of the embodiments of the present application.
- the enabling information is the second routing sub-attribute of the newly added first candidate path.
- another embodiment of the information transmission method in the embodiment of this application includes:
- the controller obtains the SR Policy.
- the controller sends the first target packet to the network node.
- the network node determines, according to the indication identifier, that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes.
- the controller sets enabling information in the second target packet.
- the controller sends the second target packet to the network node.
- the network node judges whether the second routing sub-attribute exists in the second target packet.
- the network node determines that the routing attribute of the first candidate path does not include the first SR Policy routing attribute indicated by the value of the second routing sub-attribute.
- the second target message includes the second SR Policy routing information
- the second SR Policy routing information includes the second SR Policy routing attribute and NLRI type
- the controller can add a new one in the second SR Policy routing attribute The second routing sub-attribute of the first candidate path.
- the second SR Policy routing attribute includes routing attributes such as Binding SID, SRv6Binding SID, and Policy Name (Policy Name), and these routing attributes are routes used by the first candidate path attribute, that is, the policy routing attribute at the candidate path level
- the controller can add the second routing sub-attribute AttributeEffectBitMap to the second SR Policy routing attribute, and the AttributeEffectBitMap can identify the first SR Policy routing attribute that is not used by the first candidate path.
- the first SR Policy routing attribute includes BFD and Binding SID
- the AttributeEffectBitMap can indicate the BFD in the first SR Policy routing attribute.
- the network node After the network node receives the first target message, it can judge whether there is a new AttributeEffectBitMap in the second SR Policy routing attribute of the second target message. If there is a new AttributeEffectBitMap, then obtain the BFD identified by the AttributeEffectBitMap to determine the SR Policy
- the routing attribute used by the first candidate path below is the Binding SID in the routing attribute of the first SR Policy, that is, it is determined that the first candidate path does not use BFD.
- the AttributeEffectBitMap may indicate the routing attributes in one or more first SR Policy routing attributes.
- step 2204 and step 2205 may be performed before or after step 2202, which is not limited in this embodiment of the present application.
- the controller may add a second routing sub-attribute in the second target message, and after the network node receives the second target message, it may determine whether the newly added second route sub-attribute exists in the second target message. Routing sub-attribute, if there is a newly added second routing sub-attribute, then it is determined that the routing attribute of the first candidate path does not include the first SR Policy routing attribute indicated by the value of the second routing sub-attribute, which improves the feasibility of the scheme.
- the controller in the embodiment of the present application is described below.
- the controller includes: a processor, a communication interface, and a memory.
- the memory is used to store program codes
- the processor is used to call the program codes in the memory so that the controller can execute the above-mentioned Figures 5 to 5.
- the controller may be the controller in FIG. 1 , or the controller described in some embodiments in FIGS. 5 to 24 , and details will not be repeated here.
- an embodiment of the controller 2500 in the embodiment of the present application includes:
- the obtaining unit 2501 is configured to obtain an SR Policy, wherein the SR Policy includes a first SR Policy routing attribute and at least two candidate paths.
- the obtaining unit 2501 may execute step 501 in the foregoing method embodiments.
- a sending unit 2502 configured to send a first target packet to a network node, where the first target packet includes an indication identifier and a first SR Policy routing attribute, and the indication identifier is used to instruct the network node to determine that the first SR Policy routing attribute is for at least Routing attributes for the two candidate paths.
- the sending unit 2502 may execute step 502 in the foregoing method embodiment.
- the sending unit 2502 acquires the SR Policy, wherein the SR Policy includes the first SR Policy routing attribute and at least two candidate paths, and the sending unit 2502 sends the first target message with the indicator to the network node, so that the network After receiving the target message, the node can determine the routing attribute of the first SR Policy as the routing attribute for at least two candidate paths according to the indication.
- controller 2600 in the embodiment of the present application includes:
- Obtaining unit 2601 configured to obtain segment routing policy SR Policy, SR Policy includes a first SR Policy routing attribute and at least two candidate paths;
- the sending unit 2602 is configured to send a first target message to the network node, the first target message includes an indication identifier and a first SR Policy routing attribute, and the indication identifier is used to instruct the network node to determine that the first SR Policy routing attribute is for at least two The routing attributes of a candidate path.
- the indicator includes a newly added network layer reachability information NLRI type, and the newly added NLRI type is included in the first target packet.
- the sending unit 2602 is also configured to send a first negotiation message to the network node, where the first negotiation message is used to indicate that the controller has the ability to support a newly added NLRI type;
- Controller 2600 also includes:
- the receiving unit 2603 is configured to receive a second negotiation message sent by the network node, where the second negotiation message is used to indicate that the network node has the ability to support a newly added NLRI type.
- the indication includes a value of a discriminator field, and the discriminator field is included in the first target packet.
- the indication includes the first routing sub-attribute of the newly added SR Policy, and the first routing sub-attribute is included in the first target packet.
- the indication includes a value of a tunnel type field, and the tunnel type field is included in the first target packet.
- the first target packet does not include candidate paths under the SR Policy.
- the sending unit 2602 is further configured to send a second target packet to the network node, where the second target packet includes the first candidate path among the at least two candidate paths.
- the second target message also includes a second SR Policy routing attribute, the second SR Policy routing attribute is a routing attribute for the first candidate path, and the second SR Policy routing attribute is not for the first candidate path in at least two candidate paths Two candidate paths.
- controller 2600 also includes:
- a setting unit 2604 configured to set enabling information in the second target packet, where the enabling information is used to indicate whether the first candidate path uses the first SR Policy routing attribute.
- the enabling information is the second routing sub-attribute of the newly added first candidate path.
- the first target packet is a Border Gateway Protocol packet.
- the routing attribute of the first SR Policy includes Binding SID or bidirectional forwarding detection.
- the controller 2600 provided in the embodiment of this application can be understood by referring to the corresponding content of the foregoing information transmission method embodiment.
- the controller 2600 can be the controller in FIG. 1 , or it can be described in some embodiments in FIG. 5 to FIG. 24 controller, which will not be repeated here.
- the network node includes: a processor, a communication interface, and a memory.
- the memory is used to store program codes
- the processor is used to call the program codes in the memory so that the network node executes the above-mentioned Figure 5.
- the network node may be the network node in FIG. 1 , or the network node described in some embodiments in FIGS. 5 to 24 , and details will not be repeated here.
- an embodiment of the network node 2700 in the embodiment of the present application includes:
- the receiving unit 2701 is configured to receive the first target message sent by the controller, wherein the first target message includes a first SR Policy routing attribute and an indication identifier, and the first SR Policy routing attribute is included in the SR Policy.
- the receiving unit 2701 may execute step 502 in the above method embodiment.
- the determining unit 2702 is configured to determine, according to the indication, that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes.
- the determining unit 2702 may execute step 503 in the above method embodiment.
- the receiving unit 2701 receives the first target message sent by the controller, wherein the first target message includes the first SR Policy routing attribute and the indicator set by the controller in the first target message, and the determining unit 2702 may determine that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes according to the indication, that is, determine that the first SR Policy routing attributes are routing attributes for at least two candidate paths, because the first SR Policy The routing attributes are received separately, and the subsequent received SR Policy candidate paths do not need to carry these overall routing attributes, thus avoiding the problems of message redundancy and information conflict.
- the network node in the embodiment of the present application is described in detail below. Please refer to FIG. 28.
- Another embodiment of the network node 2800 in the embodiment of the present application includes:
- the receiving unit 2801 is configured to receive the first target message sent by the controller, the first target message includes a first SR Policy routing attribute and an indication identifier, and the first SR Policy routing attribute is included in the SR Policy;
- the determining unit 2802 is configured to determine, according to the indication, that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes.
- the indicator includes a newly added NLRI type of network layer reachability information, and the newly added NLRI type is included in the first target message, and the determining unit 2802 is specifically used to determine whether there is a newly added NLRI type in the first target message.
- NLRI type if there is a newly added NLRI type in the first target message, determine that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes.
- the receiving unit 2801 is also configured to receive a first negotiation message sent by the controller, where the first negotiation message is used to indicate that the controller has the ability to support a newly added NLRI type;
- Network node 2800 also includes:
- the sending unit 2803 is configured to send a second negotiation message to the controller, where the second negotiation message is used to indicate that the network node has the ability to support a newly added NLRI type.
- the indicator includes a value of a distinguisher field, and the distinguisher field is included in the first target message, and the determining unit 2802 is specifically configured to determine whether the value of the distinguisher field is a first preset value; if the value of the distinguisher field is The value is the first preset value, and it is determined that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes.
- the indicator includes the first routing sub-attribute of the newly added SR Policy, the first routing sub-attribute is included in the first target message, and the determination unit 2802 is specifically used to determine whether there is a first routing sub-attribute in the first target message. Routing sub-attribute; if there is a first routing sub-attribute in the first target message, it is determined that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes.
- the indication includes the value of the tunnel type field, and the tunnel type field is included in the first target packet, and the determining unit 2802 is specifically configured to determine whether the value of the tunnel type field is a second preset value; if the value of the tunnel type field is The value is the second preset value, and it is determined that the routing attributes of at least two candidate paths under the SR Policy are the first SR Policy routing attributes.
- the first target packet does not include candidate paths under the SR Policy.
- the receiving unit 2801 is further configured to receive a second target message sent by the controller, where the second target message includes the first candidate path among the at least two candidate paths;
- Network node 2800 also includes:
- An obtaining unit 2804 configured to obtain the first NLRI type of the first target message and the second NLRI type of the second target message;
- the determining unit 2802 is further configured to determine that the routing attribute of the first candidate path is the first SR Policy routing attribute when the first NLRI type is the same as the second NLRI type.
- the second target message also includes a second SR Policy routing attribute
- the second SR Policy routing attribute is a routing attribute for the first candidate path
- the second SR Policy routing attribute is not for the first candidate path in at least two candidate paths
- the determining unit 2802 is specifically configured to determine that the routing attribute of the first candidate path is the first SR Policy routing attribute or the second SR Policy routing attribute.
- enabling information is set in the second target message, and the enabling information is used to indicate whether the first candidate path uses the first SR Policy routing attribute, and the determining unit 2802 is specifically configured to determine the first candidate path according to the enabling information routing properties.
- the enabling information is the second routing sub-attribute of the newly added first candidate path
- the value of the second routing sub-attribute is used to indicate the routing attribute in the first SR Policy routing attribute
- the second routing sub-attribute is included in
- the determining unit 2802 is specifically configured to determine whether there is a second routing sub-attribute in the second target message; if there is a second routing sub-attribute in the second target message, determine the routing attribute of the first candidate path
- the first SR Policy routing attribute indicated by the value of the second routing sub-attribute is not included.
- the first target packet is a Border Gateway Protocol packet.
- the routing attribute of the first SR Policy includes Binding SID or bidirectional forwarding detection.
- the network node 2800 provided in the embodiment of this application can be understood by referring to the corresponding content of the foregoing information transmission method embodiment.
- the network node 2800 can be the network node in FIG. 1, or it can be described in some embodiments in FIG. 5 to FIG. 24 The network nodes of , will not be repeated here.
- the controller 2900 includes: a processor 2901 , a communication interface 2902 , a storage system 2903 and a bus 2904 .
- the processor 2901 , the communication interface 2902 and the storage system 2903 are connected to each other through the bus 2904 .
- the processor 2901 is used to control and manage the actions of the controller 2900, for example, the processor 2901 is used to execute the information transmission method performed by the controller described in some embodiments in FIG. 5 to FIG. 24 .
- the communication interface 2902 is used to support the controller 2900 to communicate.
- the storage system 2903 is used for storing program codes and data of the controller 2900 .
- the processor 2901 may be a central processing unit, a general processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
- the processor 2901 may also be a combination that implements computing functions, for example, a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and the like.
- the bus 2904 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (Extended Industry Standard Architecture, EISA) bus, etc.
- PCI Peripheral Component Interconnect
- EISA Extended Industry Standard Architecture
- the network node 3000 includes: a processor 3001 , a communication interface 3002 , a storage system 3003 and a bus 3004 .
- the processor 3001 , the communication interface 3002 and the storage system 3003 are connected to each other through a bus 3004 .
- the processor 3001 is used to control and manage the actions of the network node 3000, for example, the processor 3001 is used to execute the information transmission method performed by the network node described in some embodiments in FIG. 5 to FIG. 24 .
- the communication interface 3002 is used to support the network node 3000 to communicate.
- the storage system 3003 is used for storing program codes and data of the network node 3000 .
- the processor 3001 may be a central processing unit, a general processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
- the processor 3001 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and the like.
- the bus 3004 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (Extended Industry Standard Architecture, EISA) bus, etc.
- PCI Peripheral Component Interconnect
- EISA Extended Industry Standard Architecture
- the network node 3000 provided by the embodiment of the present application may be the network node shown in FIG.
- the bus 3004 corresponds to the bus 304 .
- a computer-readable storage medium is also provided, and computer-executable instructions are stored in the computer-readable storage medium.
- the device executes the above-mentioned diagram. 5 to the information transmission method described in some embodiments in FIG. 24 .
- a computer program product in another embodiment, includes computer-executable instructions, and the computer-executable instructions are stored in a computer-readable storage medium; Reading the storage medium reads the computer-executed instructions, and at least one processor executes the computer-executed instructions so that the device executes the information transmission method described in some embodiments in FIG. 5 to FIG. 24 above.
- a chip system in another embodiment, includes at least one processor and an interface, the interface is used to receive data and/or signals, at least one processor is used to support the implementation of the above-mentioned Figure 5 to Figure 24 shows the information transmission method described in some embodiments.
- the system-on-a-chip may further include a memory, and the memory is used for storing necessary program instructions and data of the computer device.
- the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
- the disclosed system, device and method can be implemented in other ways.
- the device embodiments described above are only illustrative.
- the division of the units is only a logical function division. In actual implementation, there may be other division methods.
- multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
- the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
- the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
- each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
- the above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
- the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
- the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
- the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, read-only memory), random access memory (RAM, random access memory), magnetic disk or optical disc, etc., which can store program codes. .
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Abstract
本申请实施例公开了一种信息传输方法,应用于控制器向网络节点下发SR Policy的过程,可以在控制器和网络节点上实现,具体包括:控制器获取到需要下发的SR Policy,其中SR Policy包括SR Policy路由属性和至少两个候选路径,然后控制器在带有SR Policy路由属性的目标报文中设置指示标识,使网络节点接收到目标报文后可以根据该指示标识确定SR Policy路由属性为针对至少两个候选路径的路由属性,即控制器可以单独下发SR Policy下至少两个候选路径共用的路由属性。
Description
本申请要求于2021年6月25日提交中国专利局、申请号为202110716224.2、发明名称为“一种信息传输方法及相关设备”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本申请实施例涉及通信领域,尤其涉及一种信息传输方法及相关设备。
段路由策略(segment routing policy,SR Policy)是在分段路由(segment routing,SR)技术基础上发展的一种新的隧道引流技术,SR Policy包括一条或多条候选路径(candidate path),其中优先级最高的候选路径生效,而每条候选路径内部也包含一条或多条由段标识(segment ID,SID)所组成的段列表(segment list),段标识指定了报文从来源到目的地的传输路径,可以指示报文遵循指定的路径在网络节点中传送。
在draft-ietf-idr-segment-routing-te-policy草案协议中详细说明了通过边界网关协议(border gateway protocol,BGP)SR Policy地址族下发SR Policy到网络节点中的方法,具体地,定义了一个新的BGP子地址族标识(subsequent address family identifier,SAFI)网络层可达性信息(network layer reachability information,NLRI),该BGP SAFI NLRI用于发布SR Policy中的一个候选路径,即基于候选路径来下发SR Policy。
但是在SR Policy的实际应用过程中,网络节点还需要使用到基于SR Policy整体的SR Policy路由属性,所述整体的SR Policy路由属性可以是指两条或两条以上候性路径共用的路由属性,例如:BSID(Binding SID)和双向转发检测(bidirectional forwarding detection,BFD)等路由属性。若仍然通过候选路径下发这些整体SR Policy路由属性,共用这些整体SR Policy路由属性的每个候选路径都会重复携带整体SR Policy路由属性,导致报文冗余。此外,个别候选路径使用的SR Policy路由属性和整体SR Policy路由属性可能不相同,此时又会导致信息冲突的问题。
发明内容
本申请实施例提供一种信息传输方法、控制器和网络节点,用于避免下发SR Policy时出现报文冗余和信息冲突的问题。本申请实施例还提供了相应的服务器和计算机可读存储介质。
本申请第一方面提供一种信息传输方法,包括:
控制器首先获取SR Policy,该SR Policy包括第一SR Policy路由属性和至少两个候选路径,其中,第一SR Policy路由属性为针对至少两个候选路径的路由属性;
控制器获取到SR Policy后,可以生成第一目标报文,其中第一目标报文包括第一SR Policy路由属性和控制器设置的指示标识,控制器将目标报文发送给网络节点后,网络节 点就可以根据该指示标识确定该第一SR Policy路由属性为针对至少两个候选路径的路由属性,即该第一SR Policy路由属性是提供给SR Policy下至少两个候选路径共用的路由属性。
该第一方面,控制器获取SR Policy,其中SR Policy包括第一SR Policy路由属性和至少两个候选路径,控制器在目标报文中设置指示标识,使网络节点接收到目标报文后可以根据该指示标识确定第一SR Policy路由属性为针对至少两个候选路径的路由属性,因第一SR Policy路由属性是单独下发的,后续下发SR Policy的候选路径时无需重复携带这些整体路由属性,从而避免了报文冗余和信息冲突的问题。
在第一方面的一种可能的实现方式中,第一目标报文包括NLRI类型,控制器在第一目标报文中新增NLRI类型作为指示标识。
该种可能的实现方式中,控制器可以在第一目标报文中新增NLRI类型作为指示标识,提升了方案的可实现性。
在第一方面的一种可能的实现方式中,控制器向网络节点发送第一目标报文之前还会向网络节点发送第一协商报文,网络节点也会向控制器发送第二协商报文,使得控制器和网络节点之间相互协商是否具有新增NLRI类型的能力。
该种可能的实现方式中,控制器和网络节点之间相互协商都具有新增NLRI类型的能力后,控制器再在第一目标报文中新增NLRI类型作为指示标识,避免了控制器或网络节点不具有新增NLRI类型的能力时导致控制器设置指示标识失败,使网络节点无法确定第一SR Policy路由属性用途的问题,提升了方案的可行性。
在第一方面的一种可能的实现方式中,第一目标报文包括NLRI类型,NLRI类型包括区分符字段,控制器在第一目标报文中设置区分符字段的值作为指示标识。
该种可能的实现方式中,控制器可以在第一目标报文中设置区分符字段的值作为指示标识,提升了方案的可实现性。
在第一方面的一种可能的实现方式中,SR Policy包括第一SR Policy路由属性,控制器可以在第一目标报文中新增与第一SR Policy路由属性层级相同的第一路由子属性作为指示标识。
该种可能的实现方式中,控制器可以在第一目标报文中新增第一路由子属性作为指示标识,提升了方案的可实现性。
在第一方面的一种可能的实现方式中,第一目标报文包括隧道类型字段,控制器可以在第一目标报文中设置隧道类型字段的值作为指示标识。
该种可能的实现方式中,控制器可以在第一目标报文中设置隧道类型字段的值作为指示标识,提升了方案的可实现性。
在第一方面的一种可能的实现方式中,第一目标报文不包括SR Policy下的候选路径,即控制器是单独下发第一SR Policy路由属性。
该种可能的实现方式中,控制器是单独下发第一SR Policy路由属性,后续下发SR Policy的候选路径时无需携带这些第一SR Policy路由属性,从而避免了报文冗余和信息冲突的问题。
在第一方面的一种可能的实现方式中,控制器还会向网络节点发送第二目标报文,其中第二目标报文包括至少两个候选路径中的第一候选路径。
该种可能的实现方式中,控制器除了单独下发SR Policy至少两个候选路径共用的第一SR Policy路由属性,还可以单独下发候选路径,使得整个SR Policy完成下发,提升了方案的完整性。
在第一方面的一种可能的实现方式中,第二目标报文还包括第二SR Policy路由属性,其中第二SR Policy路由属性为针对第一候选路径的路由属性,第二SR Policy路由属性不针对至少两个候选路径中的第二候选路径,即第二SR Policy路由属性是第一候选路径下携带的路由属性。
该种可能的实现方式中,候选路径中也携带有路由属性,提升了方案的完整性。
在第一方面的一种可能的实现方式中,控制器向网络节点发送第二目标报文之前,控制器还在第二目标报文中设置了使能信息,网络节点接收到第二目标报文后就可以根据使能信息确定第一候选路径是否使用第一SR Policy路由属性。
该种可能的实现方式中,当候选路径也携带有路由属性时,控制器可以在第二目标报文中设置使能信息,从而控制第一候选路径使用第一SR Policy路由属性、第二SR Policy路由属性或不使用路由属性,控制器可以针对不同的情况设置不同的使能信息,提升了方案的可选择性。
在第一方面的一种可能的实现方式中,第一候选路径包括第二SR Policy路由属性,控制器可以在第二目标报文中新增与第二SR Policy路由属性层级相同的第二路由子属性作为使能信息。
该种可能的实现方式中,控制器可以在第二目标报文中新增第二路由子属性作为使能信息,提升了方案的可实现性。
在第一方面的一种可能的实现方式中,第一目标报文为边界网关协议报文,即第一目标报文是基于BGP的报文。
该种可能的实现方式中,限定了第一目标报文的通信协议,提升了方案的可实现性。
在第一方面的一种可能的实现方式中,第一SR Policy路由属性包括Binding SID或双向转发检测,即第一SR Policy路由属性可以为BSID,也可以为BFD,还可以为BSID以及BFD。
该种可能的实现方式中,限定了第一SR Policy路由属性的具体内容,提升了方案的可实现性。
本申请第二方面提供一种信息传输方法,包括:
网络节点接收控制器发送的第一目标报文,其中第一目标报文包括第一SR Policy路由属性和控制器在第一目标报文中设置的指示标识,第一SR Policy路由属性包含于SR Policy中,SR Policy还包括至少两个候选路径,第一SR Policy路由属性为针对至少两个候选路径的路由属性,即该第一SR Policy路由属性是提供给SR Policy下至少两个候选路径共用的路由属性;
网络节点接收到第一目标报文后,就可以根据指示标识确定SR Policy下至少两个候 选路径的路由属性为第一SR Policy路由属性。
该第二方面,网络节点接收控制器发送的第一目标报文,其中第一目标报文包括第一SR Policy路由属性和控制器在第一目标报文中设置的指示标识,网络节点可以根据该指示标识确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性,即确定第一SR Policy路由属性为针对至少两个候选路径的路由属性,因第一SR Policy路由属性是单独接收的,后续接收的SR Policy的候选路径中无需重复携带这些整体路由属性,从而避免了报文冗余和信息冲突的问题。
在第二方面的一种可能的实现方式中,第一目标报文包括NLRI类型,控制器在第一目标报文中新增NLRI类型作为指示标识。网络节点接收到第一目标报文后可以判断第一目标报文中是否存在新增的NLRI类型,若第一目标报文中存在新增的NLRI类型,网络节点就可以确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性,即确定第一SR Policy路由属性为针对至少两个候选路径的路由属性。
该种可能的实现方式中,控制器可以在第一目标报文中新增NLRI类型作为指示标识,对应的,网络节点可以判断第一目标报文中是否存在新增的NLRI类型,从而确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性,提升了方案的可实现性。
在第二方面的一种可能的实现方式中,网络节点接收控制器发送的第一目标报文之前,控制器会向网络节点发送第一协商报文,网络节点也会向控制器发送第二协商报文,使得控制器和网络节点之间相互协商是否具有新增NLRI类型的能力。
该种可能的实现方式中,控制器和网络节点之间相互协商都具有新增NLRI类型的能力后,控制器再在第一目标报文中新增NLRI类型作为指示标识,避免了控制器或网络节点不具有新增NLRI类型的能力时导致控制器设置指示标识失败,使网络节点无法确定第一SR Policy路由属性用途的问题,提升了方案的可行性。
在第二方面的一种可能的实现方式中,第一目标报文包括NLRI类型,NLRI类型包括区分符字段,控制器在第一目标报文中设置区分符字段的值作为指示标识。网络节点接收到第一目标报文后可以判断区分符字段的值是否为第一预设值;若区分符字段的值为第一预设值,网络节点确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性,即确定第一SR Policy路由属性为针对至少两个候选路径的路由属性。
该种可能的实现方式中,控制器可以在第一目标报文中设置区分符字段的值作为指示标识,对应的,网络节点可以判断第一目标报文中区分符字段的值是否为第一预设值,从而确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性,提升了方案的可实现性。
在第二方面的一种可能的实现方式中,SR Policy包括第一SR Policy路由属性,控制器可以在第一目标报文中新增与第一SR Policy路由属性层级相同的第一路由子属性作为指示标识。网络节点接收到第一目标报文后,可以判断第一目标报文中是否存在第一路由子属性;若第一目标报文中存在第一路由子属性,网络节点确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性,即确定第一SR Policy路由属性为针对至少两个候选路径的路由属性。
该种可能的实现方式中,控制器可以在第一目标报文中新增第一路由子属性作为指示标识,对应的,网络节点可以判断第一目标报文中是否存在第一路由子属性,从而确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性,提升了方案的可实现性。
在第二方面的一种可能的实现方式中,第一目标报文包括隧道类型字段,控制器可以在第一目标报文中设置隧道类型字段的值作为指示标识。网络节点接收到第一目标报文后,可以判断隧道类型字段的值是否为第二预设值;若隧道类型字段的值为第二预设值,网络节点确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性,即确定第一SR Policy路由属性为针对至少两个候选路径的路由属性。
该种可能的实现方式中,控制器可以在第一目标报文中设置隧道类型字段的值作为指示标识,对应的,网络节点可以判断隧道类型字段的值是否为第二预设值,从而确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性,提升了方案的可实现性。
在第二方面的一种可能的实现方式中,第一目标报文不包括SR Policy下的候选路径,即网络节点是单独接收控制器下发的第一SR Policy路由属性。
该种可能的实现方式中,网络节点是单独接收控制器下发的第一SR Policy路由属性,网络节点后续接收的SR Policy的候选路径无需携带这些第一SR Policy路由属性,从而避免了报文冗余和信息冲突的问题。
在第二方面的一种可能的实现方式中,网络节点还会接收控制器发送的第二目标报文,其中第二目标报文包括至少两个候选路径中的第一候选路径;在网络节点接收到第一目标报文和第二目标报文后,可以获取第一目标报文的第一NLRI类型与第二目标报文的第二NLRI类型;当第一NLRI类型与第二NLRI类型相同时,网络节点就确定第一候选路径的路由属性为第一SR Policy路由属性,即将第一SR Policy路由属性提供给第一候选路径使用。
该种可能的实现方式中,网络节点除了接收控制器单独下发的SR Policy至少两个候选路径共用的第一SR Policy路由属性,还会接收控制器单独下发的候选路径,并在第一SR Policy路由属性和候选路径都接收到后根据第一目标报文和第二目标报文的NLRI类型关联路由属性,使得整个SR Policy完成下发,提升了方案的完整性。
在第二方面的一种可能的实现方式中,第二目标报文还包括第二SR Policy路由属性,其中第二SR Policy路由属性为针对第一候选路径的路由属性,第二SR Policy路由属性不针对至少两个候选路径中的第二候选路径,即当网络节点接收到第一SR Policy路由属性和第一候选路径,且第一候选路径还携带有第二SR Policy路由属性时,网络节点可以确定第一候选路径的路由属性为第一SR Policy路由属性或第二SR Policy路由属性。
该种可能的实现方式中,第一候选路径中也携带有路由属性时,网络节点可以选择第一候选路径使用自身携带的第二SR Policy路由属性或控制器单独下发的第一SR Policy路由属性,提升了方案的可选择性。
在第二方面的一种可能的实现方式中,控制器在第二目标报文中设置有使能信息,其 中使能信息用于指示第一候选路径是否使用第一SR Policy路由属性,网络节点可以根据使能信息确定第一候选路径的路由属性,即网络节点可以控制候选路径使用第一SR Policy路由属性、第二SR Policy路由属性或不使用路由属性。
该种可能的实现方式中,当候选路径也携带有路由属性时,网络节点可以根据控制器在第二目标报文中设置的使能信息,控制第一候选路径使用第一SR Policy路由属性、第二SR Policy路由属性或不使用路由属性,提升了方案的可选择性。
在第二方面的一种可能的实现方式中,第一候选路径包括第二SR Policy路由属性,控制器可以在第二目标报文中新增与第二SR Policy路由属性层级相同的第二路由子属性作为使能信息,其中第二路由子属性的值用于指示第一SR Policy路由属性中的路由属性,网络节点接收到第二目标报文后,可以判断第二目标报文中是否存在第二路由子属性;若第二目标报文中存在第二路由子属性,网络节点可以确定第一候选路径的路由属性不包括第二路由子属性的值指示的第一SR Policy路由属性,即网络节点可以控制第一候选路径不使用部分的第一SR Policy路由属性。
该种可能的实现方式中,控制器可以在第二目标报文中新增第二路由子属性作为使能信息,网络节点可以控制第一候选路径不使用部分的第一SR Policy路由属性,提升了方案的可实现性。
在第二方面的一种可能的实现方式中,第一目标报文为边界网关协议报文,即第一目标报文是基于BGP的报文。
该种可能的实现方式中,限定了第一目标报文的通信协议,提升了方案的可实现性。
在第二方面的一种可能的实现方式中,第一SR Policy路由属性包括Binding SID或双向转发检测,即第一SR Policy路由属性可以为BSID,也可以为BFD,还可以为BSID以及BFD。
该种可能的实现方式中,限定了第一SR Policy路由属性的具体内容,提升了方案的可实现性。
本申请第三方面提供一种控制器,包括:
获取单元,用于获取段路由策略SR Policy,所述SR Policy包括第一SR Policy路由属性和至少两个候选路径;
发送单元,用于向网络节点发送第一目标报文,所述第一目标报文包括指示标识和所述第一SR Policy路由属性,所述指示标识用于指示所述网络节点确定所述第一SR Policy路由属性为针对所述至少两个候选路径的路由属性。
本申请第三方面的控制器执行本申请第一方面或第一方面的任意可能的实现方式中的方法。
本申请第四方面提供一种网络节点,包括:
接收单元,用于接收控制器发送的第一目标报文,所述第一目标报文包括第一SR Policy路由属性和指示标识,所述第一SR Policy路由属性包含于SR Policy中;
确定单元,用于根据所述指示标识确定所述SR Policy下至少两个候选路径的路由属性为所述第一SR Policy路由属性。
本申请第四方面的网络节点执行本申请第二方面或第二方面的任意可能的实现方式中的方法。
本申请第五方面提供一种控制器,包括:
处理器、通信接口和存储器,所述存储器用于存储程序代码,所述处理器用于调用所述存储器中的程序代码以使得所述控制器执行第一方面或第一方面的任意可能的实现方式中的方法。
本申请第六方面提供一种网络节点,包括:
处理器、通信接口和存储器,所述存储器用于存储程序代码,所述处理器用于调用所述存储器中的程序代码以使得所述网络节点执行本申请第二方面或第二方面的任意可能的实现方式中的方法。
本申请第七方面提供一种计算机可读存储介质,包括指令,当所述指令在计算机上运行时,使得计算机执行如第一方面或第一方面的任意可能的实现方式中的方法。
本申请第八方面提供一种计算机可读存储介质,包括指令,当所述指令在计算机上运行时,使得计算机执行如第二方面或第二方面的任意可能的实现方式中的方法。
本申请第九方面提供一种存储一个或多个计算机执行指令的计算机程序产品,当计算机执行指令被处理器执行时,处理器执行如上述第一方面或第一方面任意一种可能的实现方式的方法。
本申请第十方面提供一种存储一个或多个计算机执行指令的计算机程序产品,当计算机执行指令被处理器执行时,处理器执行如上述第二方面或第二方面任意一种可能的实现方式的方法。
本申请第十一方面提供了一种芯片系统,该芯片系统包括至少一个处理器和接口,该接口用于接收数据和/或信号,至少一个处理器用于支持计算机设备实现上述第一方面或第一方面任意一种可能的实现方式中所涉及的功能。在一种可能的设计中,芯片系统还可以包括存储器,存储器,用于保存计算机设备必要的程序指令和数据。该芯片系统,可以由芯片构成,也可以包含芯片和其他分立器件。
本申请第十二方面提供了一种芯片系统,该芯片系统包括至少一个处理器和接口,该接口用于接收数据和/或信号,至少一个处理器用于支持计算机设备实现上述第二方面或第二方面任意一种可能的实现方式中所涉及的功能。在一种可能的设计中,芯片系统还可以包括存储器,存储器,用于保存计算机设备必要的程序指令和数据。该芯片系统,可以由芯片构成,也可以包含芯片和其他分立器件。
图1为一种在网络中的网络节点下发SR Policy的框架示意图;
图2为本申请实施例提供的网络节点的一结构示意图;
图3为本申请实施例提供的网络节点的另一结构示意图;
图4为SR Policy的结构示意图;
图5为本申请实施例提供的信息传输方法的一实施例示意图;
图6为本申请实施例提供的第一SR Policy路由信息的一结构示意图;
图7为本申请实施例提供的信息传输方法的另一实施例示意图;
图8为本申请实施例提供的新增的NLRI类型的TLV格式图;
图9为本申请实施例提供的第一SR Policy路由信息的另一结构示意图;
图10为本申请实施例提供的信息传输方法的另一实施例示意图;
图11A为本申请实施例提供的第一协商报文的结构示意图;
图11B为本申请实施例提供的第一协商报文中一可选参数的TLV格式图;
图12为本申请实施例提供的第一协商报文中另一可选参数的TLV格式图;
图13为本申请实施例提供的信息传输方法的另一实施例示意图;
图14为本申请实施例提供的NLRI类型的TLV格式图;
图15为本申请实施例提供的信息传输方法的另一实施例示意图;
图16为本申请实施例提供的第一SR Policy路由信息的另一结构示意图;
图17为本申请实施例提供的新增的第一路由子属性的TLV格式图;
图18为本申请实施例提供的信息传输方法的另一实施例示意图;
图19为本申请实施例提供的第一SR Policy路由信息的另一结构示意图;
图20为本申请实施例提供的信息传输方法的另一实施例示意图;
图21为本申请实施例提供的信息传输方法的另一实施例示意图;
图22为本申请实施例提供的信息传输方法的另一实施例示意图;
图23为本申请实施例提供的信息传输方法的另一实施例示意图;
图24为本申请实施例提供的第二SR Policy路由信息的结构示意图;
图25为本申请实施例提供的控制器的一结构示意图;
图26为本申请实施例提供的控制器的另一结构示意图;
图27为本申请实施例提供的网络节点的一结构示意图;
图28为本申请实施例提供的网络节点的另一结构示意图;
图29为本申请实施例提供的控制器的另一结构示意图;
图30为本申请实施例提供的网络节点的另一结构示意图。
下面结合附图,对本申请的实施例进行描述,显然,所描述的实施例仅仅是本申请一部分的实施例,而不是全部的实施例。本领域普通技术人员可知,随着技术的发展和新场景的出现,本申请实施例提供的技术方案对于类似的技术问题,同样适用。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象,而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换,以便这里描述的实施例能够以除了在这里图示或描述的内容以外的顺序实施。此外,术语“包括”和“具有”以及他们的任何变形,意图在于覆盖不排他的包含,例如,包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元,而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它 步骤或单元。
在这里专用的词“示例性”意为“用作例子、实施例或说明性”。这里作为“示例性”所说明的任何实施例不必解释为优于或好于其它实施例。
另外,为了更好的说明本申请,在下文的具体实施方式中给出了众多的具体细节。本领域技术人员应当理解,没有某些具体细节,本申请同样可以实施。在一些实例中,对于本领域技术人员熟知的方法、手段、元件和电路未作详细描述,以便于凸显本申请的主旨。
本申请实施例提供了一种信息传输方法及相关设备,用于避免控制器下发SR Policy报文冗余和信息冲突的问题。
请参阅图1,当用户需要对网络进行流量调优时,可以通过使用段路由策略(segment routing policy,SR Policy)指定数据报文在网络中的各网络节点的传输路径实现。其中,网络可以为路由网络,网络包括控制器和多个网络节点,控制器为独立的控制器,具体可以为计算机,网络节点可以看作一个转发设备,转发设备具体可以为路由器或交换机。
示例性的,请参阅图2,网络节点可以包括主控板210和接口板220,主控板210和接口板220连接,主控板210包括第一处理器211和第一存储器212,第一处理器211和第一存储器212连接,接口板220包括第二处理器221、第二存储器222和接口卡223,第二处理器221和第二存储器222连接,第二存储器222和接口卡223连接。其中第一处理器211用于调用第一存储器212中的程序指令执行相应的处理功能,第二处理器221用于调用第二存储器222中的程序指令执行报文的接收和发送,接口卡223用于与外部设备连接以接收数据。
示例性的,请参阅图3,网络节点可以包括收发器302、处理器301、存储器303和总线304。收发器302用于执行报文的接收和发送,存储器303用于存储程序指令,处理器301用于调用存储器303中的程序指令执行相应的处理功能。
一并参阅图1,控制器接收到用户请求后,会根据用户请求完成收集网络拓扑,具体的,控制器会和网络中的一个或多个网络节点建立BGP-LS(BGP Link-state)邻居,网络中包括网络节点P1、网络节点P2、网络节点PE1、网络节点PE2、网络节点PE3、网络节点PE4、网络节点CE1和网络节点CE2,网络节点CE2发送数据给网络节点CE1时,控制器可以通过网络节点PE3完成整个网络拓扑收集,从而计算得到用户需求的SR Policy,最后控制器需要将SR Policy下发给各个网络节点以完成SR Policy的部署,网络节点CE2的数据将按照SR Policy指定的传送路径发送给网络节点CE1。其中,SR Policy可以基于网际协议版本4(internet protocol version 4,IPv4)或网际协议版本6(internet protocol version 6,IPv6),此时SR Policy可以表示为SRv4Policy或SRv6Policy。
请参考协议号draft-ietf-idr-segment-routing-te-policy-13,一并参阅图4,SR Policy包括一条或多条候选路径(candidate path),每条候选路径可以包括优先级(Preference),其中优先级最高的候选路径生效,每条候性路径可以具备路由属性,候选路径的路由属性可以包括BSID(Binding SID)和策略名称(Policy Name)等,还可以包括双向转发检测(bidirectional forwarding detection,BFD),而每条候选路径内部也包含一条或多条由段标识(segment ID,SID)所组成的段列表(segment list)以及段列表的权重(Weight),段标识指定了报文的传输路径,可以指示报文遵循指定的路径在网络节点 中传送。
下面结合上述SR Policy架构和应用场景对本申请实施例中的信息传输方法进行描述,请参阅图5,本申请实施例提供的信息传输方法的一个实施例包括:
501、控制器获取SR Policy。
当用户需要部署SR Policy对网络进行流量调优时,控制器负责收集网络拓扑计算得到用户需求的SR Policy,SR Policy包括第一SR Policy路由属性和至少两个候选路径,即SR Policy至少包括第一SR Policy路由属性、第一候选路径和第二候选路径,SR Policy还可能包括第三候选路径、第四候选路径等等,本申请实施例对此不作限制。示例性的,第一SR Policy路由属性包括Binding SID或双向转发检测(BFD),即第一SR Policy路由属性可以只包括Binding SID,也可以只包括BFD,还可以包括Binding SID和BFD,Binding SID和BFD都是用于提供给SR Policy下所有的候选路径共同使用的路由属性。
502、控制器向网络节点发送第一目标报文。
控制器向网络节点发送第一目标报文之前,还会和网络节点建立BGP邻居,具体的,控制器包括基于BGP的SR Policy地址族,当网络中的网络节点也包括基于BGP的SR Policy地址族时,控制器就会和其建立BGP邻居,即BGP SR Policy邻居,一并参照图1,控制器和网络节点PE3建立了BGP SR Policy邻居,需要说明的是,本申请实施例中以控制器向一个网络节点下发SR Policy为例,控制器向其他网络节点下发SR Policy的步骤和方法相同,本申请实施例不再赘述。
控制器可以在和网络节点建立BGP邻居之前或之后生成第一目标报文,其中第一目标报文为BGP报文,请参考协议号draft-ietf-idr-segment-routing-te-policy-13,一并参阅图6,第一目标报文包括第一SR Policy路由信息,第一SR Policy路由信息中包括属性(Attributes)和NLRI类型,属性包括第一SR Policy路由属性,第一SR Policy路由属性中只包括SR Policy级的路由属性,而不包括SR Policy下的候选路径,其中SR Policy级的路由属性可以理解为整个SR Policy使用的路由属性,即Binding SID、SRv6Binding SID等路由属性是提供给SR Policy下所有的候选路径共同使用的路由属性。
此外,控制器还在第一目标报文中设置指示标识,指示标识用于指示网络节点确定第一SR Policy路由属性为针对至少两个候选路径的路由属性,即用于告知网络节点第一SR Policy路由信息是用于提供给SR Policy下所有的候选路径共同使用的路由属性。需要说明的是,因第一SR Policy路由属性中不包括SR Policy下的候选路径,因此第一目标报文也不包括SR Policy下的候选路径。
503、网络节点根据指示标识确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性。
网络节点接收到第一目标报文后,就可以根据第一目标报文中的指示标识确定该SR Policy下的候选路径使用的路由属性为第一SR Policy路由属性,在网络节点后续接收到控制器发送的该SR Policy下的候选路径后,网络节点在使用某一候选路径执行转发数据报文时,该候选路径使用的路由属性为第一SR Policy路由属性。
本申请实施例中,控制器获取SR Policy,其中SR Policy包括第一SR Policy路由属性 和至少两个候选路径,控制器在目标报文中设置指示标识,使网络节点接收到目标报文后可以根据该指示标识确定第一SR Policy路由属性为针对至少两个候选路径的路由属性,因第一SR Policy路由属性是单独下发的,后续下发SR Policy的候选路径时无需携带这些整体路由属性,从而避免了报文冗余和信息冲突的问题。
本申请实施例中,控制器在第一目标报文中设置的指示标识可以是多种形式,下面分别进行说明:
一、指示标识为新增的网络层可达性信息NLRI类型:
请参阅图7,本申请实施例中信息传输方法另一实施例包括:
701、控制器获取SR Policy。
702、控制器向网络节点发送第一目标报文。
703、网络节点判断第一目标报文中是否存在新增的NLRI类型。
704、若第一目标报文中存在新增的NLRI类型,网络节点确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性。
请参阅图8,第一SR Policy路由信息中包括第一SR Policy路由属性和NLRI类型,控制器可以在第一SR Policy路由信息中新增一个NLRI类型,该新增的NLRI类型包括8比特的NLRI长度(NLRI Length)、32比特的颜色(Policy Color)以及32比特或128比特的端点(Endpoint),请参阅图9,该新增的NLRI类型在第一SR Policy路由信息中表示为由Policy Color和Endpoint组成。
网络节点接收到第一目标报文后,可以判断第一目标报文中是否存在新增的NLRI类型,若存在新增的NLRI类型,则确定SR Policy下的候选路径使用的路由属性为第一SR Policy路由属性。
本申请实施例中,控制器可以在第一目标报文中新增NLRI类型,网络节点接收到第一目标报文后,可以判断第一目标报文中是否存在新增的NLRI类型,若存在新增的NLRI类型,则确定SR Policy下的候选路径使用的路由属性为第一SR Policy路由属性,提升了方案的可实现性。
请参阅图10,本申请实施例提供的信息传输方法的另一实施例包括:
1001、控制器获取SR Policy。
1002、控制器向网络节点发送第一协商报文。
1003、网络节点向控制器发送的第二协商报文。
1004、控制器向网络节点发送第一目标报文。
1005、网络节点判断第一目标报文中是否存在新增的NLRI类型。
1006、若第一目标报文中存在新增的NLRI类型,网络节点确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性。
在控制器和网络节点建立BGP邻居后,控制器可以和网络节点之间相互协商,用于获取对方是否具有支持新增NLRI类型的能力。具体的,请参考协议号RFC 4271,一并参阅图11A,第一协商报文为BGP Open报文,第一协商报文包括自主系统(My Autonimous System)、保持时间(Hold Time)、BGP标识符(BGP Identifier)和可选参数列表(Optional Parameters) 等,可选参数列表中的每个可选参数为一个TLV(type-length-value)格式的单元,一并参阅图11B,可选参数包括参数类型(Parm.Type)、参数长度(Parm.Length)和参数值(Parameter Value),本申请实施例中,请参考协议号RFC 3392,参阅图12,可选参数包括能力参数,能力参数包括8比特的能力编码(Capability Code)、8比特的能力长度(Capability Length)和可变长度的能力值(Capability Value),控制器在能力编码中新增NLRI能力编码,NLRI能力编码用于指示邻居能力是否具有支持新增NLRI类型的能力,能力值可以设置为0/1标识,若能力值为1,则表示具有支持解析新增NLRI类型的能力,即控制器可以生成第一协商报文,用于表示控制器具有支持新增NLRI类型的能力,第二协商报文的原理与第一协商报文相同,本申请实施例不再赘述。
本申请实施例中,控制器和网络节点之间相互协商都具有新增NLRI类型的能力后,控制器再在第一目标报文中新增NLRI类型作为指示标识,避免了控制器或网络节点不具有新增NLRI类型的能力时导致控制器设置指示标识失败,使网络节点无法确定第一SR Policy路由属性用途的问题,提升了本申请实施例的可行性。
二、指示标识为区分符字段的值:
请参阅图13,本申请实施例中信息传输方法另一实施例包括:
1301、控制器获取SR Policy。
1302、控制器向网络节点发送第一目标报文。
1303、网络节点判断区分符字段的值是否为第一预设值。
1304、若区分符字段的值为第一预设值,网络节点确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性。
请参阅图14,第一SR Policy路由信息中包括第一SR Policy路由属性和NLRI类型,NLRI类型包括8比特的NLRI长度(NLRI Length)、32比特的区分符字段(Distinguisher)、32比特的颜色(Policy Color)以及32比特或128比特的端点(Endpoint),其中Distinguisher用于区分不同的候选路径,控制器可以设置指示标识为区分符字段的值,例如设置Distinguisher的值等于0xFFFF FFFF。
网络节点接收到第一目标报文后,可以判断第一目标报文中NLRI类型的区分符字段的值,若区分符字段的值为0xFFFF FFFF,则确定SR Policy下的候选路径使用的路由属性为第一SR Policy路由属性。
本申请实施例中,控制器可以在第一目标报文中设置区分符字段的值为第一预设值,网络节点接收到第一目标报文后,可以判断第一目标报文中区分符字段的值是否为第一预设值,若区分符字段的值为第一预设值,则确定SR Policy下的候选路径使用的路由属性为第一SR Policy路由属性,提升了本申请实施例的可实现性。
三、指示标识为新增的SR Policy的第一路由子属性:
请参阅图15,本申请实施例中信息传输方法另一实施例包括:
1501、控制器获取SR Policy。
1502、控制器向网络节点发送第一目标报文。
1503、网络节点判断第一目标报文中是否存在第一路由子属性;
1504、若第一目标报文中存在第一路由子属性,网络节点确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性。
请参阅图16,第一SR Policy路由信息中包括第一SR Policy路由属性和NLRI类型,控制器可以在第一SR Policy路由属性中新增一个SR Policy的第一路由子属性,示例性的,第一SR Policy路由属性包括Binding SID、SRv6Binding SID、Policy名称(Policy Name)和BFD信息(BFD Info)等路由属性,这些路由属性都是SR Policy下的候选路径使用的路由属性,即Policy级的整体Policy路由属性,控制器可以在第一SR Policy路由属性中新增第一路由子属性Global Policy Identifier,请参阅图17,Global Policy Identifier包括种类(Type)、长度(Length)、标识符(Identifier)和预留块(RESERVED)。
网络节点接收到第一目标报文后,可以判断第一目标报文的第一SR Policy路由属性中是否存在新增的Global Policy Identifier,或判断Global Policy Identifier的值是否为1,若存在新增的Global Policy Identifier,或Global Policy Identifier的值为1,则确定SR Policy下的候选路径使用的路由属性为第一SR Policy路由属性。
本申请实施例中,控制器可以在第一目标报文中新增SR Policy的第一路由子属性,网络节点接收到第一目标报文后,可以判断第一目标报文中是否存在第一路由子属性,若第一目标报文中存在第一路由子属性,则确定SR Policy下的候选路径使用的路由属性为第一SR Policy路由属性,提升了本申请实施例的可实现性。
四、指示标识为隧道类型字段的值:
请参阅图18,本申请实施例中信息传输方法另一实施例包括:
1801、控制器获取SR Policy。
1802、控制器向网络节点发送第一目标报文。
1803、网络节点判断隧道类型字段的值是否为第二预设值;
1804、若隧道类型字段的值为第二预设值,网络节点确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性。
请参阅图19,第一SR Policy路由信息中包括NLRI类型和属性字段(Attributes),属性字段(Attributes)包括隧道封装属性字段(Tunnel Encaps Attributes)、隧道类型字段(Tunnel Type)和第一SR Policy路由属性,其中Tunnel Type的值为SR Policy,控制器可以设置指示标识为隧道类型字段的值,例如设置Tunnel Type的值为Entire SR Policy,网络节点接收到第一目标报文后,可以判断第一目标报文中Tunnel Type的值,若Tunnel Type的值为Entire SR Policy,则确定SR Policy下的候选路径使用的路由属性为第一SR Policy路由属性。
本申请实施例中,控制器可以在第一目标报文中设置隧道类型字段为第二预设值,网络节点接收到第一目标报文后,可以判断第一目标报文中隧道类型字段是否为第二预设值,若隧道类型字段的值为第二预设值,则确定SR Policy下的候选路径使用的路由属性为第一SR Policy路由属性,提升了方案的可实现性。
本申请实施例中,控制器可以通过上述四种方式设置指示标识,提升了本申请实施例的可实现性。
本申请实施例中,控制器除了向网络节点下发第一目标报文,还会下发携带有候选路径的第二目标报文,请参阅图20,本申请实施例中信息传输方法另一实施例包括:
2001、控制器获取SR Policy。
2002、控制器向网络节点发送第一目标报文。
2003、网络节点根据指示标识确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性。
2004、控制器向网络节点发送第二目标报文。
2005、网络节点获取第一目标报文的第一NLRI类型与第二目标报文的第二NLRI类型;
2006、当第一NLRI类型与第二NLRI类型相同时,网络节点确定第一候选路径的路由属性为第一SR Policy路由属性。
SR Policy包括第一SR Policy路由属性和至少两个候选路径,因此控制器除了向网络节点下发第一目标报文,还会下发携带有候选路径的第二目标报文,其中第二目标报文包括至少一个候选路径,即至少两个候选路径中的第一候选路径。网络节点接收到第一目标报文和第二目标报文后就可以完成SR Policy的部署,其中网络节点使用第一候选路径作为转发策略,第一候选路径使用第一SR Policy路由属性作为应用时的路由属性。可选的,控制器还会向网络节点发送第三目标报文,第三目标报文包括至少两个候选路径中的第二候选路径,此时网络节点根据第一候选路径和第二候选路径的优先级确定使用的候选路径,第一候选路径和第二候选路径都使用第一SR Policy路由属性作为应用时的路由属性。可选的,候选路径的数量大于两个,那么控制器还可以继续向网络节点发送包括第三候选路径的第四目标报文和包括第四候选路径的第五目标报文等等。
网络节点接收到控制器发送的第一目标报文后,可以根据第一目标报文中的指示标识确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性,网络节点接收到控制器发送的第一目标报文和第二目标报文后,可以获取到第一目标报文的第一NLRI类型与第二目标报文的第二NLRI类型,当第一NLRI类型与第二NLRI类型相同时,网络节点确定第一候选路径的路由属性为第一SR Policy路由属性。具体的,网络节点获取第一NLRI类型中的颜色和端点以及第二NLRI类型中的颜色和端点,当第一NLRI类型中的颜色和端点与第二NLRI类型中的颜色和端点相同时,网络节点就可以确定第一候选路径的路由属性为第一SR Policy路由属性,从而完成该网络节点的第一候选路径的SR Policy部署,当该SR Policy的候选路径都被下发至各个网络节点后,就完成了SR Policy的部署。
示例性的,一并参照图1,网络节点PE3、网络节点P2和网络节点PE1接收到控制器发送的第一目标报文和第二目标报文后,网络节点PE3接收到数据时就会根据第一候选路径和第一SR Policy路由属性的指示将数据依次传送至网络节点P2和网络节点PE1。
需要说明的是,步骤2004可以在步骤2002之前或之后执行,本申请实施例对此不作限制。
本申请实施例中,控制器除了向网络节点下发第一SR Policy路由属性,还会下发候选路径,使得整个SR Policy被下发,提升了本申请实施例的完整性。
本申请实施例中,控制器下发的候选路径自身也携带有路由属性,请参阅图21,本申 请实施例中信息传输方法另一实施例包括:
2101、控制器获取SR Policy。
2102、控制器向网络节点发送第一目标报文。
2103、网络节点根据指示标识确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性。
2104、控制器向网络节点发送第二目标报文。
2105、网络节点获取第一目标报文的第一NLRI类型与第二目标报文的第二NLRI类型;
2106、当第一NLRI类型与第二NLRI类型相同时,网络节点确定第一候选路径的路由属性为第一SR Policy路由属性或第二SR Policy路由属性。
第二SR Policy路由属性为针对第一候选路径的路由属性,第二SR Policy路由属性不针对至少两个候选路径中的第二候选路径,即第一候选路径自身还携带有候选路径级的路由属性,该路由属性仅用于提供给第一候选路径使用,此时网络节点接收到第一目标报文和第二目标报文后,且第一SR Policy路由属性和第二SR Policy路由属性冲突时,可以选择第一候选路径使用第一SR Policy路由属性或第二SR Policy路由属性,本申请实施例对此不作限制。
本申请实施例中,控制器向网络节点下发的候选路径自身也携带有路由属性,提升了本申请实施例的完整性。
本申请实施例中,控制器还可以在发送第二目标报文之前在第二目标报文中设置使能信息,请参阅图22,本申请实施例中信息传输方法另一实施例包括:
2201、控制器获取SR Policy。
2202、控制器向网络节点发送第一目标报文。
2203、网络节点根据指示标识确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性。
2204、控制器在第二目标报文中设置使能信息。
2205、控制器向网络节点发送第二目标报文。
2206、网络节点根据使能信息确定第一候选路径的路由属性。
控制器向网络节点发送第二目标报文之前,还可以在第二目标报文中设置使能信息,使能信息用于指示第一候选路径是否使用第一SR Policy路由属性,即SR Policy下的候选路径可以选择使用第一目标报文中的第一SR Policy路由属性,也可以选择不使用第一目标报文中的第一SR Policy路由属性,示例性的,当第二目标报文中包括第二SR Policy路由属性,即第一候选路径中携带有路由属性,控制器可以设置使能信息,使第一候选路径不使用第一SR Policy路由属性,而使用自身携带的第二SR Policy路由属性。当第二目标报文中不包括第二SR Policy路由属性,控制器也可以设置使能信息,使第一候选路径不使用第一SR Policy路由属性,从而不使用路由属性。相应的,当第二目标报文中包括第二SR Policy路由属性,即第一候选路径中携带有路由属性,控制器可以设置使能信息,使第一候选路径使用第一SR Policy路由属性,而不使用自身携带的第二SR Policy路由属性。当第二目标报文中不包括第二SR Policy路由属性,控制器也可以设置使能信息,使第一候选 路径使用第一SR Policy路由属性。
网络节点接收到第二目标报文后,可以获取第二目标报文中的使能信息,然后根据使能信息确定第一候选路径的路由属性。示例性的,使能信息指示第一候选路径使用第一SR Policy路由属性中的BFD,而第二目标报文中包括第二SR Policy路由属性,第二SR Policy路由属性包括Binding SID,此时网络节点设置第一候选路径使用的路由属性为第一SR Policy路由属性中的BFD和第二SR Policy路由属性的Binding SID。示例性的,使能信息指示第一候选路径使用第一SR Policy路由属性中的BFD,而第二目标报文中包括第二SR Policy路由属性,第二SR Policy路由属性包括BFD,此时网络节点设置第一候选路径使用的路由属性为第一SR Policy路由属性中的BFD。示例性的,使能信息指示第一候选路径不使用第一SR Policy路由属性,而第二目标报文中包括第二SR Policy路由属性,此时网络节点设置第一候选路径使用第二SR Policy路由属性。
本申请实施例中,控制器还可以在发送第二目标报文之前在第二目标报文中设置使能信息,使得网络节点可以根据使能信息确定第一候选路径的路由属性,其中使能信息可以是根据用户需求选取的,因此用户可以决定SR Policy中某一条候选路径是否使用第一SR Policy路由属性中的某个路由属性,提高了本申请实施例的可选择性。
本申请一种可能的实施例中,使能信息为新增的第一候选路径的第二路由子属性。请参阅图23,本申请实施例中信息传输方法另一实施例包括:
2301、控制器获取SR Policy。
2302、控制器向网络节点发送第一目标报文。
2303、网络节点根据指示标识确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性。
2304、控制器在第二目标报文中设置使能信息。
2305、控制器向网络节点发送第二目标报文。
2306、网络节点判断第二目标报文中是否存在第二路由子属性。
2307、若第二目标报文中存在第二路由子属性,网络节点确定第一候选路径的路由属性不包括第二路由子属性的值指示的第一SR Policy路由属性。
请参阅图24,第二目标报文包括第二SR Policy路由信息,第二SR Policy路由信息中包括第二SR Policy路由属性和NLRI类型,控制器可以在第二SR Policy路由属性中新增一个第一候选路径的第二路由子属性,示例性的,第二SR Policy路由属性包括Binding SID、SRv6Binding SID和Policy名称(Policy Name)等路由属性,这些路由属性都是第一候选路径使用的路由属性,即候选路径级的Policy路由属性,控制器可以在第二SR Policy路由属性中新增第二路由子属性AttributeEffectBitMap,AttributeEffectBitMap可以标识出第一候选路径不使用的第一SR Policy路由属性,具体的,第一SR Policy路由属性包括BFD和Binding SID,AttributeEffectBitMap可以指示第一SR Policy路由属性中的BFD。
网络节点接收到第一目标报文后,可以判断第二目标报文的第二SR Policy路由属性中是否存在新增的AttributeEffectBitMap,若存在新增的AttributeEffectBitMap,则获取AttributeEffectBitMap标识的BFD,确定SR Policy下的第一候选路径使用的路由属性为第 一SR Policy路由属性中的Binding SID,即确定第一候选路径不使用BFD。其中,AttributeEffectBitMap可以指示一个或多个第一SR Policy路由属性中的路由属性。
需要说明的是,步骤2204和步骤2205可以在步骤2202之前或之后执行,本申请实施例对此不作限制。
本申请实施例中,控制器可以在第二目标报文中新增第二路由子属性,网络节点接收到第二目标报文后,可以判断第二目标报文中是否存在新增的第二路由子属性,若存在新增的第二路由子属性,则确定第一候选路径的路由属性不包括第二路由子属性的值指示的第一SR Policy路由属性,提升了方案的可实现性。
下面对本申请实施例中的控制器进行描述,控制器包括:处理器、通信接口和存储器,存储器用于存储程序代码,处理器用于调用存储器中的程序代码以使得控制器可以执行上述图5至图24部分实施例所描述的信息传输方法,该控制器可以为图1中的控制器,也可以为图5至图24部分实施例所描述的控制器,具体此处不再赘述。
请参阅图25,本申请实施例中控制器2500一个实施例包括:
获取单元2501,用于获取SR Policy,其中SR Policy包括第一SR Policy路由属性和至少两个候选路径。该获取单元2501可以执行上述方法实施例中的步骤501。
发送单元2502,用于向网络节点发送第一目标报文,其中第一目标报文包括指示标识和第一SR Policy路由属性,指示标识用于指示网络节点确定第一SR Policy路由属性为针对至少两个候选路径的路由属性。该发送单元2502可以执行上述方法实施例中的步骤502。
本申请实施例中,发送单元2502获取SR Policy,其中SR Policy包括第一SR Policy路由属性和至少两个候选路径,发送单元2502向网络节点发送设置有指示标识的第一目标报文,使网络节点接收到目标报文后可以根据该指示标识确定第一SR Policy路由属性为针对至少两个候选路径的路由属性,因第一SR Policy路由属性是单独下发的,后续下发SR Policy的候选路径时无需携带这些整体路由属性,从而避免了报文冗余和信息冲突的问题。
下面对本申请实施例中的控制器进行详细描述,请参阅图26,本申请实施例中控制器2600另一实施例包括:
获取单元2601,用于获取段路由策略SR Policy,SR Policy包括第一SR Policy路由属性和至少两个候选路径;
发送单元2602,用于向网络节点发送第一目标报文,第一目标报文包括指示标识和第一SR Policy路由属性,指示标识用于指示网络节点确定第一SR Policy路由属性为针对至少两个候选路径的路由属性。
可选的,指示标识包括新增的网络层可达性信息NLRI类型,新增的NLRI类型包含于第一目标报文中。
可选的,发送单元2602还用于向网络节点发送第一协商报文,第一协商报文用于表示控制器具有支持新增NLRI类型的能力;
控制器2600还包括:
接收单元2603,用于接收网络节点发送的第二协商报文,第二协商报文用于表示网络节点具有支持新增NLRI类型的能力。
可选的,指示标识包括区分符字段的值,区分符字段包含于第一目标报文中。
可选的,指示标识包括新增的SR Policy的第一路由子属性,第一路由子属性包含于第一目标报文中。
可选的,指示标识包括隧道类型字段的值,隧道类型字段包含于第一目标报文中。
可选的,第一目标报文不包括SR Policy下的候选路径。
可选的,发送单元2602还用于向网络节点发送第二目标报文,第二目标报文包括至少两个候选路径中的第一候选路径。
可选的,第二目标报文还包括第二SR Policy路由属性,第二SR Policy路由属性为针对第一候选路径的路由属性,第二SR Policy路由属性不针对至少两个候选路径中的第二候选路径。
可选的,控制器2600还包括:
设置单元2604,用于在第二目标报文中设置使能信息,使能信息用于指示第一候选路径是否使用第一SR Policy路由属性。
可选的,使能信息为新增的第一候选路径的第二路由子属性。
可选的,第一目标报文为边界网关协议报文。
可选的,第一SR Policy路由属性包括Binding SID或双向转发检测。
本申请实施例提供的控制器2600可以参阅前述信息传输方法实施例部分的相应内容进行理解,该控制器2600可以为图1中的控制器,也可以为图5至图24部分实施例所描述的控制器,此处不再重复赘述。
下面对本申请实施例中的网络节点进行描述,网络节点包括:处理器、通信接口和存储器,存储器用于存储程序代码,处理器用于调用所述存储器中的程序代码以使得网络节点执行上述图5至图24部分实施例所描述的信息传输方法,该网络节点可以为图1中的网络节点,也可以为图5至图24部分实施例所描述的网络节点,具体此处不再赘述。
请参阅图27,本申请实施例中网络节点2700一个实施例包括:
接收单元2701,用于接收控制器发送的第一目标报文,其中第一目标报文包括第一SR Policy路由属性和指示标识,第一SR Policy路由属性包含于SR Policy中。该接收单元2701可以执行上述方法实施例中的步骤502。
确定单元2702,用于根据指示标识确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性。该确定单元2702可以执行上述方法实施例中的步骤503。
本申请实施例中,接收单元2701接收控制器发送的第一目标报文,其中第一目标报文包括第一SR Policy路由属性和控制器在第一目标报文中设置的指示标识,确定单元2702可以根据该指示标识确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性,即确定第一SR Policy路由属性为针对至少两个候选路径的路由属性,因第一SR Policy路由属性是单独接收的,后续接收的SR Policy的候选路径中无需携带这些整体路由属性,从而避免了报文冗余和信息冲突的问题。
下面对本申请实施例中的网络节点进行详细描述,请参阅图28,本申请实施例中网络节点2800另一实施例包括:
接收单元2801,用于接收控制器发送的第一目标报文,第一目标报文包括第一SR Policy路由属性和指示标识,第一SR Policy路由属性包含于SR Policy中;
确定单元2802,用于根据指示标识确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性。
可选的,指示标识包括新增的网络层可达性信息NLRI类型,新增的NLRI类型包含于第一目标报文中,确定单元2802具体用于判断第一目标报文中是否存在新增的NLRI类型;若第一目标报文中存在新增的NLRI类型,确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性。
可选的,接收单元2801还用于接收控制器发送的第一协商报文,第一协商报文用于表示控制器具有支持新增NLRI类型的能力;
网络节点2800还包括:
发送单元2803,用于向控制器发送第二协商报文,第二协商报文用于表示网络节点具有支持新增NLRI类型的能力。
可选的,指示标识包括区分符字段的值,区分符字段包含于第一目标报文中,确定单元2802具体用于判断区分符字段的值是否为第一预设值;若区分符字段的值为第一预设值,确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性。
可选的,指示标识包括新增的SR Policy的第一路由子属性,第一路由子属性包含于第一目标报文中,确定单元2802具体用于判断第一目标报文中是否存在第一路由子属性;若第一目标报文中存在第一路由子属性,确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性。
可选的,指示标识包括隧道类型字段的值,隧道类型字段包含于第一目标报文中,确定单元2802具体用于判断隧道类型字段的值是否为第二预设值;若隧道类型字段的值为第二预设值,确定SR Policy下至少两个候选路径的路由属性为第一SR Policy路由属性。
可选的,第一目标报文不包括SR Policy下的候选路径。
可选的,接收单元2801还用于接收控制器发送的第二目标报文,第二目标报文包括至少两个候选路径中的第一候选路径;
网络节点2800还包括:
获取单元2804,用于获取第一目标报文的第一NLRI类型与第二目标报文的第二NLRI类型;
确定单元2802还用于当第一NLRI类型与第二NLRI类型相同时,确定第一候选路径的路由属性为第一SR Policy路由属性。
可选的,第二目标报文还包括第二SR Policy路由属性,第二SR Policy路由属性为针对第一候选路径的路由属性,第二SR Policy路由属性不针对至少两个候选路径中的第二候选路径,确定单元2802具体用于确定第一候选路径的路由属性为第一SR Policy路由属性或第二SR Policy路由属性。
可选的,第二目标报文中设置有使能信息,使能信息用于指示第一候选路径是否使用第一SR Policy路由属性,确定单元2802具体用于根据使能信息确定第一候选路径的路由属 性。
可选的,使能信息为新增的第一候选路径的第二路由子属性,第二路由子属性的值用于指示第一SR Policy路由属性中的路由属性,第二路由子属性包含于第二目标报文中,确定单元2802具体用于判断第二目标报文中是否存在第二路由子属性;若第二目标报文中存在第二路由子属性,确定第一候选路径的路由属性不包括第二路由子属性的值指示的第一SR Policy路由属性。
可选的,第一目标报文为边界网关协议报文。
可选的,第一SR Policy路由属性包括Binding SID或双向转发检测。
本申请实施例提供的网络节点2800可以参阅前述信息传输方法实施例部分的相应内容进行理解,该网络节点2800可以为图1中的网络节点,也可以为图5至图24部分实施例所描述的网络节点,此处不再重复赘述。
如图29控制器所示,为本申请的实施例提供的控制器2900的一种可能的逻辑结构示意图。控制器2900包括:处理器2901、通信接口2902、存储系统2903以及总线2904。处理器2901、通信接口2902以及存储系统2903通过总线2904相互连接。在本申请的实施例中,处理器2901用于对控制器2900的动作进行控制管理,例如,处理器2901用于执行图5至图24部分实施例所描述控制器执行的信息传输方法。通信接口2902用于支持控制器2900进行通信。存储系统2903,用于存储控制器2900的程序代码和数据。
其中,处理器2901可以是中央处理器单元,通用处理器,数字信号处理器,专用集成电路,现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框,模块和电路。处理器2901也可以是实现计算功能的组合,例如包含一个或多个微处理器组合,数字信号处理器和微处理器的组合等等。总线2904可以是外设部件互连标准(Peripheral Component Interconnect,PCI)总线或扩展工业标准结构(Extended Industry Standard Architecture,EISA)总线等。总线可以分为地址总线、数据总线、控制总线等。为便于表示,图29中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。
如图30网络节点所示,为本申请的实施例提供的网络节点3000的一种可能的逻辑结构示意图。网络节点3000包括:处理器3001、通信接口3002、存储系统3003以及总线3004。处理器3001、通信接口3002以及存储系统3003通过总线3004相互连接。在本申请的实施例中,处理器3001用于对网络节点3000的动作进行控制管理,例如,处理器3001用于执行图5至图24部分实施例所描述网络节点执行的信息传输方法。通信接口3002用于支持网络节点3000进行通信。存储系统3003,用于存储网络节点3000的程序代码和数据。
其中,处理器3001可以是中央处理器单元,通用处理器,数字信号处理器,专用集成电路,现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框,模块和电路。处理器3001也可以是实现计算功能的组合,例如包含一个或多个微处理器组合,数字信号处理器和微处理器的组合等等。总线3004可以是外设部件互连标准(Peripheral Component Interconnect,PCI)总线或扩展工业标准结构(Extended Industry Standard Architecture,EISA)总线等。总线可以分为地址总线、数据总线、控制总线等。为便于表示,图30中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。
示例性的,一并参照图3,本申请的实施例提供的网络节点3000可以为图3表示的网络节点,其中,处理器3001对应处理器301,通信接口3002对应收发器302,存储系统3003对应存储器303,总线3004对应总线304。
在本申请的另一实施例中,还提供一种计算机可读存储介质,计算机可读存储介质中存储有计算机执行指令,当设备的至少一个处理器执行该计算机执行指令时,设备执行上述图5至图24部分实施例所描述的信息传输方法。
在本申请的另一实施例中,还提供一种计算机程序产品,该计算机程序产品包括计算机执行指令,该计算机执行指令存储在计算机可读存储介质中;设备的至少一个处理器可以从计算机可读存储介质读取该计算机执行指令,至少一个处理器执行该计算机执行指令使得设备执行上图5至图24部分实施例所描述的信息传输方法。
在本申请的另一实施例中,还提供一种芯片系统,该芯片系统包括至少一个处理器和接口,该接口用于接收数据和/或信号,至少一个处理器用于支持实现上述图5至图24部分实施例所描述的信息传输方法。在一种可能的设计中,芯片系统还可以包括存储器,存储器,用于保存计算机设备必要的程序指令和数据。该芯片系统,可以由芯片构成,也可以包含芯片和其他分立器件。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统,装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统,装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(ROM,read-only memory)、 随机存取存储器(RAM,random access memory)、磁碟或者光盘等各种可以存储程序代码的介质。
Claims (29)
- 一种信息传输方法,其特征在于,包括:控制器获取段路由策略SR Policy,所述SR Policy包括第一SR Policy路由属性和至少两个候选路径;所述控制器向网络节点发送第一目标报文,所述第一目标报文包括指示标识和所述第一SR Policy路由属性,所述指示标识用于指示所述网络节点确定所述第一SR Policy路由属性为针对所述至少两个候选路径的路由属性。
- 根据权利要求1所述的方法,其特征在于,所述指示标识包括新增的网络层可达性信息NLRI类型,所述新增的NLRI类型包含于所述第一目标报文中。
- 根据权利要求2所述的方法,其特征在于,所述控制器向网络节点发送第一目标报文之前,所述方法还包括:所述控制器向所述网络节点发送第一协商报文,所述第一协商报文用于表示所述控制器具有支持新增NLRI类型的能力;所述控制器接收所述网络节点发送的第二协商报文,所述第二协商报文用于表示所述网络节点具有支持新增NLRI类型的能力。
- 根据权利要求1所述的方法,其特征在于,所述指示标识包括区分符字段的值,所述区分符字段包含于所述第一目标报文中。
- 根据权利要求1所述的方法,其特征在于,所述指示标识包括新增的所述SR Policy的第一路由子属性,所述第一路由子属性包含于所述第一目标报文中。
- 根据权利要求1所述的方法,其特征在于,所述指示标识包括隧道类型字段的值,所述隧道类型字段包含于所述第一目标报文中。
- 根据权利要求1至6中任一项所述的方法,其特征在于,所述第一目标报文不包括所述SR Policy下的候选路径。
- 根据权利要求1至6中任一项所述的方法,其特征在于,所述方法还包括:所述控制器向所述网络节点发送第二目标报文,所述第二目标报文包括所述至少两个候选路径中的第一候选路径。
- 根据权利要求8所述的方法,其特征在于,所述第二目标报文还包括第二SR Policy路由属性,所述第二SR Policy路由属性为针对所述第一候选路径的路由属性,所述第二SR Policy路由属性不针对所述至少两个所述候选路径中的第二候选路径。
- 根据权利要求8所述的方法,其特征在于,所述控制器向所述网络节点发送第二目标报文之前,所述方法还包括:所述控制器在所述第二目标报文中设置使能信息,所述使能信息用于指示所述第一候选路径是否使用所述第一SR Policy路由属性。
- 根据权利要求10所述的方法,其特征在于,所述使能信息为新增的所述第一候选路径的第二路由子属性。
- 根据权利要求1至6或9至11中任一项所述的方法,其特征在于,所述第一目标报文为边界网关协议报文。
- 根据权利要求1至6或9至11中任一项所述的方法,其特征在于,所述第一SRPolicy路由属性包括Binding SID或双向转发检测。
- 一种信息传输方法,其特征在于,包括:网络节点接收控制器发送的第一目标报文,所述第一目标报文包括第一SR Policy路由属性和指示标识,所述第一SR Policy路由属性包含于SR Policy中;所述网络节点根据所述指示标识确定所述SR Policy下至少两个候选路径的路由属性为所述第一SR Policy路由属性。
- 根据权利要求14所述的方法,其特征在于,所述指示标识包括新增的网络层可达性信息NLRI类型,所述新增的NLRI类型包含于所述第一目标报文中,所述网络节点根据所述指示标识确定所述SR Policy下至少两个候选路径的路由属性为所述第一SR Policy路由属性包括:所述网络节点判断所述第一目标报文中是否存在所述新增的NLRI类型;若所述第一目标报文中存在所述新增的NLRI类型,所述网络节点确定所述SR Policy下至少两个候选路径的路由属性为所述第一SR Policy路由属性。
- 根据权利要求15所述的方法,其特征在于,所述网络节点接收控制器发送的第一目标报文之前,所述方法还包括:所述网络节点接收所述控制器发送的第一协商报文,所述第一协商报文用于表示所述控制器具有支持新增NLRI类型的能力;所述网络节点向所述控制器发送第二协商报文,所述第二协商报文用于表示所述网络节点具有支持新增NLRI类型的能力。
- 根据权利要求14所述的方法,其特征在于,所述指示标识包括区分符字段的值,所述区分符字段包含于所述第一目标报文中,所述网络节点根据所述指示标识确定所述SRPolicy下至少两个候选路径的路由属性为所述第一SR Policy路由属性包括:所述网络节点判断所述区分符字段的值是否为第一预设值;若所述区分符字段的值为第一预设值,所述网络节点确定所述SR Policy下至少两个候选路径的路由属性为所述第一SR Policy路由属性。
- 根据权利要求14所述的方法,其特征在于,所述指示标识包括新增的所述SR Policy的第一路由子属性,所述第一路由子属性包含于所述第一目标报文中,所述网络节点根据所述指示标识确定所述SR Policy下至少两个候选路径的路由属性为所述第一SR Policy路由属性包括:所述网络节点判断所述第一目标报文中是否存在所述第一路由子属性;若所述第一目标报文中存在所述第一路由子属性,所述网络节点确定所述SR Policy下至少两个候选路径的路由属性为所述第一SR Policy路由属性。
- 根据权利要求14所述的方法,其特征在于,所述指示标识包括隧道类型字段的值,所述隧道类型字段包含于所述第一目标报文中,所述网络节点根据所述指示标识确定所述SR Policy下至少两个候选路径的路由属性为所述第一SR Policy路由属性包括:所述网络节点判断所述隧道类型字段的值是否为第二预设值;若所述隧道类型字段的值为第二预设值,所述网络节点确定所述SR Policy下至少两个候选路径的路由属性为所述第一SR Policy路由属性。
- 根据权利要求14至19中任一项所述的方法,其特征在于,所述第一目标报文不包括所述SR Policy下的候选路径。
- 根据权利要求14至19中任一项所述的方法,其特征在于,所述方法还包括:所述网络节点接收所述控制器发送的第二目标报文,所述第二目标报文包括所述至少两个候选路径中的第一候选路径;所述网络节点获取所述第一目标报文的第一NLRI类型与所述第二目标报文的第二NLRI类型;当所述第一NLRI类型与所述第二NLRI类型相同时,所述网络节点确定所述第一候选路径的路由属性为所述第一SR Policy路由属性。
- 根据权利要求21所述的方法,其特征在于,所述第二目标报文还包括第二SR Policy路由属性,所述第二SR Policy路由属性为针对所述第一候选路径的路由属性,所述第二SR Policy路由属性不针对所述至少两个所述候选路径中的第二候选路径,所述网络节点确定所述候选路径的路由属性为所述第一SR Policy路由属性包括:所述网络节点确定所述第一候选路径的路由属性为所述第一SR Policy路由属性或所述第二SR Policy路由属性。
- 根据权利要求21所述的方法,其特征在于,所述第二目标报文中设置有使能信息,所述使能信息用于指示所述第一候选路径是否使用所述第一SR Policy路由属性,所述网络节点确定所述候选路径的路由属性为所述第一SR Policy路由属性包括:所述网络节点根据所述使能信息确定所述第一候选路径的路由属性。
- 根据权利要求23所述的方法,其特征在于,所述使能信息为新增的所述第一候选路径的第二路由子属性,所述第二路由子属性的值用于指示所述第一SR Policy路由属性中的路由属性,所述第二路由子属性包含于所述第二目标报文中,所述网络节点根据所述使能信息确定所述第一候选路径的路由属性包括:所述网络节点判断所述第二目标报文中是否存在所述第二路由子属性;若所述第二目标报文中存在所述第二路由子属性,所述网络节点确定所述第一候选路径的路由属性不包括所述第二路由子属性的值指示的所述第一SR Policy路由属性。
- 根据权利要求14至19或22至24中任一项所述的方法,其特征在于,所述第一目标报文为边界网关协议报文。
- 根据权利要求14至19或22至24中任一项所述的方法,其特征在于,所述第一SR Policy路由属性包括Binding SID或双向转发检测。
- 一种控制器,包括:处理器、通信接口和存储器,所述存储器用于存储程序代码,所述处理器用于调用所述存储器中的程序代码以使得所述控制器执行如权利要求1-13任一项所述的方法。
- 一种网络节点,包括:处理器、通信接口和存储器,所述存储器用于存储程序代码,所述处理器用于调用所述存储器中的程序代码以使得所述网络节点执行如权利要求14-26 任一项所述的方法。
- 一种计算机可读存储介质,包括指令,当所述指令在计算机上运行时,使得计算机执行如权利要求1至13或14至26中任一项所述的方法。
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