CN116132295A - Message interaction method and network function virtualization network element - Google Patents
Message interaction method and network function virtualization network element Download PDFInfo
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Abstract
The embodiment of the invention provides a message interaction method and a network function virtualization network element, wherein the network function virtualization network element is provided with a fast forwarding plane and a slow forwarding plane, and the method comprises the following steps: the fast forwarding plane generates a first message based on a preset encapsulation rule and sends the first message to the slow forwarding plane; the first message is used for requesting to generate a fast forwarding table item; the fast forwarding plane receives a second message generated by the slow forwarding plane based on a preset encapsulation rule, and configures a fast forwarding table item according to the second message so as to fast forward the received flow data according to the fast forwarding table item; the second message contains relevant information for configuring the fast forwarding table entry. According to the embodiment of the invention, the information interaction between the fast forwarding plane and the slow forwarding plane based on the preset encapsulation rule is realized, and the flexibility and the expansibility are improved.
Description
Technical Field
The present invention relates to the field of network technologies, and in particular, to a method for packet interaction and a network function virtualization network element.
Background
In a forwarding system of an SDN (Software Defined Network ), there are two forwarding situations of CPU-intensive and IO (Input Output) intensive, for example, if a protocol computation, encryption and decryption and the like consume more CPU, the CPU-intensive is the case, and if a routing forwarding and the like require larger IO bandwidth, the IO-intensive is the case.
In order to solve the problem of mismatch of CPU intensive forwarding resources and IO intensive forwarding resources, a mechanism for separating fast forwarding from slow forwarding is generally arranged, and separation and deployment are carried out through different resource pools, so that the purposes of improving the resource utilization rate, reducing the cost, reducing the fault influence surface and the like can be achieved.
Under the cloud network scene, a mechanism of separating fast forwarding from slow forwarding is applied, a fast forwarding plane and a slow forwarding plane can be arranged in a forwarding system of the SDN, the two forwarding planes are deployed on different cloud server clusters, information interaction is required between the two forwarding platforms deployed on the different cloud server clusters, and the information interaction mechanism between the fast forwarding plane and the slow forwarding plane is difficult to meet the requirements along with the continuous change of the requirements.
Disclosure of Invention
In view of the above, a method and network function virtualization network element for providing a message interaction that overcomes or at least partially solves the above-mentioned problems are proposed, comprising:
A method of message interaction applied to a fast forwarding plane in a network function virtualized network element, the network function virtualized network element deployed with a fast forwarding plane and a slow forwarding plane, the fast forwarding plane and the slow forwarding plane deployed in different cloud server clusters, the method comprising:
the fast forwarding plane generates a first message based on a preset encapsulation rule and sends the first message to the slow forwarding plane; the first message is used for requesting to generate a fast forwarding table item; the report generated based on the preset encapsulation rule has a data type field and a data value field for carrying interaction information, and different data types correspond to different network function virtualization network elements;
the fast forwarding plane receives a second message generated by the slow forwarding plane based on a preset encapsulation rule, and configures a fast forwarding table item according to the second message so as to fast forward the received flow data according to the fast forwarding table item; the second message contains relevant information for configuring the fast forwarding table entry.
Optionally, the method further comprises:
the fast forwarding plane generates a third message based on a preset encapsulation rule and sends the third message to the slow forwarding plane; the third message contains flow statistical information in the forwarding process.
Optionally, in the message generated based on the preset encapsulation rule, the data type field is determined according to the type of the network function virtual network element, and the data value field is determined according to the interaction information between the fast forwarding plane and the slow forwarding plane in the network function virtual network element.
Optionally, before the generating the first packet based on the preset encapsulation rule and sending the first packet to the slow forwarding plane, the method further includes:
the fast forwarding plane receives the flow data and judges whether a corresponding fast forwarding table item is configured or not;
and under the condition that the corresponding fast forwarding table item is not configured, the fast forwarding plane executes the first message generated based on the preset encapsulation rule and sends the first message to the slow forwarding plane.
Optionally, the fast forwarding plane is provided with message forwarding function logic, and the slow forwarding plane is provided with service function logic for generating a fast forwarding table item.
Optionally, the network function virtualization network element includes a virtualization network element for implementing any one of the following network functions:
server load balancing, network load balancing, gateway load balancing, network address translation and forwarding routing.
A method of message interaction applied to a slow forwarding plane in a network function virtualized network element, the network function virtualized network element deployed with a fast forwarding plane and a slow forwarding plane, the fast forwarding plane and the slow forwarding plane deployed in different cloud server clusters, the method comprising:
the slow forwarding plane receives a first message generated by the fast forwarding plane based on a preset encapsulation rule; the first message is used for requesting to generate a fast forwarding table item; the report generated based on the preset encapsulation rule has a data type field and a data value field for carrying interaction information, and different data types correspond to different network function virtualization network elements;
the slow forwarding plane generates a second message based on a preset encapsulation rule, and sends the second message to the fast forwarding plane, so that the fast forwarding plane configures a fast forwarding table item according to the second message, and fast forwards received flow data according to the fast forwarding table item; the second message contains relevant information for configuring the fast forwarding table entry.
Optionally, the method further comprises:
The slow forwarding plane receives a third message generated by the fast forwarding plane based on a preset encapsulation rule; the third message contains flow statistical information in the forwarding process.
A network function virtualized network element deployed with a fast forwarding plane and a slow forwarding plane, the fast forwarding plane and the slow forwarding plane being deployed in different cloud server clusters, the fast forwarding plane being configured to:
generating a first message based on a preset encapsulation rule, and sending the first message to the slow forwarding plane; the first message is used for requesting to generate a fast forwarding table item; the report generated based on the preset encapsulation rule has a data type field and a data value field for carrying interaction information, and different data types correspond to different network function virtualization network elements;
receiving a second message generated by the slow forwarding plane based on a preset encapsulation rule, and configuring a fast forwarding table item according to the second message so as to fast forward the received flow data according to the fast forwarding table item; the second message contains relevant information for configuring the fast forwarding table entry.
A network function virtualized network element deployed with a fast forwarding plane and a slow forwarding plane, the fast forwarding plane and the slow forwarding plane being deployed in different cloud server clusters, the slow forwarding plane being configured to:
receiving a first message generated by the fast forwarding plane based on a preset encapsulation rule; the first message is used for requesting to generate a fast forwarding table item; the report generated based on the preset encapsulation rule has a data type field and a data value field for carrying interaction information, and different data types correspond to different network function virtualization network elements;
generating a second message based on a preset encapsulation rule, and sending the second message to the fast forwarding plane, so that the fast forwarding plane configures a fast forwarding table item according to the second message, and fast forwards the received flow data according to the fast forwarding table item; the second message contains relevant information for configuring the fast forwarding table entry.
An electronic device comprising a processor, a memory and a computer program stored on the memory and capable of running on the processor, which when executed by the processor implements a method of message interaction as described above.
A computer readable storage medium having stored thereon a computer program which when executed by a processor implements a method of message interaction as described above.
The embodiment of the invention has the following advantages:
in the embodiment of the invention, the network function virtualization network element is provided with the fast forwarding plane and the slow forwarding plane, the fast forwarding plane and the slow forwarding plane are deployed in different cloud server clusters, the fast forwarding plane generates the first message based on the preset encapsulation rule and sends the first message to the slow forwarding plane, then receives the second message generated by the slow forwarding plane based on the preset encapsulation rule, and configures the fast forwarding table according to the second message so as to fast forward the received flow data according to the fast forwarding table, thereby realizing information interaction between the fast forwarding plane and the slow forwarding plane based on the preset encapsulation rule and improving flexibility and expansibility.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description of the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of a system architecture according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating steps of a method for message interaction according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating steps of another method for message interaction according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating steps of another method for message interaction according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating steps of another method for message interaction according to an embodiment of the present invention.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In a cloud network scenario, a mechanism of separating fast forwarding from slow forwarding is applied, and a fast forwarding plane and a slow forwarding plane can be arranged in a forwarding system of the SDN and deployed on different cloud server clusters.
As shown in fig. 1, the fast forwarding plane is a PT (Packet Transformation) plane, which has a message forwarding function logic, and the slow forwarding plane is a SD (Service configuration) plane, which has a Service function logic for generating a fast forwarding table entry, including a first packet trigger and a Service configuration, where the fast forwarding table entry may be used to direct the content of a message process, such as including NAT (Network Address Translation) rules, packet encapsulation information, interface information of a message egress, and the like.
The slow forwarding plane may be used for performing protocol and service processing, for example, for network function virtualization (NFV, network Function Virtualization) network elements implementing NAT functions, where the protocol and service processing is message address translation, the slow forwarding plane needs to notify a fast forwarding plane of a processed result, which is used for guiding fast forwarding of a message, and information to be exchanged between the two planes may include an outgoing interface of the message, how the message is modified (the NFV network elements implementing NAT functions need to perform address translation), how the message is encapsulated, and so on.
As shown in fig. 1, traffic data of other VPCs (Virtual Private Cloud, virtual private clouds) can be introduced into a PT plane (i.e., a fast forwarding plane) in an NFV network element through an ENI-bonding technology, and the PT plane searches for a fast forwarding table entry to perform fast forwarding of a message. If the PT plane does not find the fast forwarding table entry, a Mismatch message is constructed on the PT plane, the Mismatch message is sent to the SD plane (i.e. the slow forwarding plane) in the NFV network element from the PT plane, the SD plane carries out service logic processing on the message, and after the SD plane finishes the service logic processing, the processing result is informed to the PT plane through an Offload message so that the PT plane carries out subsequent fast forwarding. In addition, the PT plane can upload traffic information such as statistics in the forwarding process to the SD plane through Report messages, such as statistics information such as message receiving number, sending number, traffic size, traffic byte number and the like, so that operations such as Debug, charging and the like can be conveniently carried out on the SD plane.
The Mismatch message (send message) refers to that the fast forwarding plane has no forwarding table entry, and sends the message to the slow forwarding plane. The Offload message (the downlink message) refers to that after the slow forwarding plane receives the Mismatch message of the fast forwarding plane, the protocol and service processing are performed, and then the modified content of the message is sent to the fast forwarding plane through the Offload message. The Report message (synchronous message) refers to that the fast forwarding plane informs the information such as own message traffic to the slow forwarding plane for operations such as Debug and charging.
In a specific implementation, the mismatching message, the Offload message and the Report message are generated based on a flow, namely, a five-tuple formed by a source IP, a destination IP, a protocol number, a source port and a destination port is a flow, forwarding of one flow is only processed on a fast forwarding plane, and when the fast forwarding plane is not configured with a corresponding fast forwarding table item, interaction of the mismatching message, the Offload message and the Report message with a control plane (namely, a slow forwarding plane) is needed, namely, the mismatching message, the Offload message and the Report message are control plane interaction messages based on flow forwarding.
In practical application, VXLAN (Virtual Extensible Local Area Network, virtual expansion local area network) or a customized interaction mode may be adopted, where information interaction is required between two forwarding platforms deployed on different cloud server clusters. Specifically, in the VXLAN scheme, a fixed VXLAN message format is agreed between the PT plane and the SD plane, so that a message between two forwarding planes is fixed, but the VXLAN message format needs to be continuously expanded along with more and more network elements supported, so that difficulties caused by the fixed VXLAN format need to be increased, such as information redundancy, complex change, low efficiency and the like of the VXLAN message format.
For example, the network element 1 carries the interaction information 1 through a message, the network element 2 carries the interaction information 2 through a message, and as the types of the network elements are increased, more and more information needs to be carried, the code is continuously modified and cannot be expanded due to the fixed format.
In the embodiment of the invention, by proposing a message interaction scheme based on a preset encapsulation rule, the preset encapsulation rule can be an encapsulation rule defined based on a GENEVE (Generic Network Virtualization Encapsulation, general network virtualization encapsulation) protocol, which provides flexible and extensible message support for inter-ECS information interaction flow between a fast forwarding plane and a slow forwarding plane in a cloud network, and solves the problems that an information interaction API interface between the two forwarding planes is complex and the function cannot be flexibly extended in adaptation to the change of requirements.
Specifically, the fast forwarding plane and the slow forwarding plane in the NFV network element can use the gene message to perform interaction, and the flexibility of Type (data Type), length (data Length) and Value (data Value) in the gene message is fully utilized to carry complex Mismatch, offload, report message information.
For example, if the network element 1 is to carry the interaction information 1 through a message, then type= A, value =information 1, and if the network element 2 is to carry the interaction information 2 through a message, then type= B, value =information 2, so that each service only care about the own message Type, length, value, and different services do not affect each other.
Further description is given below:
referring to fig. 2, a flowchart illustrating steps of a method for packet interaction according to an embodiment of the present invention may be applied to a network function virtualized network element, where the network function virtualized network element includes a virtualized network element for implementing any one of the following network functions: server load balancing (Server Load Balancer, SLB), network load balancing (Network Load Balancing, NLB), gateway load balancing (Gateway Load Balancer, GWLB), network address translation, forwarding Routing (RT).
In order to realize a mechanism of separating fast forwarding from slow forwarding in a forwarding system of an SDN, a network function virtualization network element can be deployed with a fast forwarding plane and a slow forwarding plane, the fast forwarding plane and the slow forwarding plane are deployed in different cloud server clusters, and the separation deployment is carried out through different resource pools, so that the purposes of improving the resource utilization rate, reducing the cost, reducing the fault influence surface and the like can be achieved.
As shown in fig. 1, the fast forwarding plane is a PT plane, which has message forwarding function logic, the slow forwarding plane is an SD plane, and has service function logic for generating a fast forwarding table entry, including first packet triggering and service configuration, where the fast forwarding table entry may be used to guide the content of message processing, such as including NAT rule, message encapsulation information, interface information of message egress, and the like.
The slow forwarding plane may be used for performing protocol and service processing, for example, for a network function virtualized network element implementing NAT function, where the protocol and service processing is message address conversion, and the slow forwarding plane needs to notify a fast forwarding plane of a processed result, so as to direct forwarding of a fast forwarding message, where information to be exchanged between the two planes may include an outgoing interface of the message, how the message is modified (an NFV network element implementing NAT function needs to perform address conversion), how the message is packaged, and so on.
Specifically, the method comprises the following steps:
The first message is a Mismatch message (send message) encapsulated by a preset encapsulation rule, for example, a general network virtualization encapsulation protocol is used for encapsulation, where the Mismatch message (first message) refers to a first message of a fast forwarding plane without a forwarding table item, and is to be forwarded to a slow forwarding plane.
When the fast forwarding plane is to interact with the slow forwarding plane, the fast forwarding plane may generate a first packet based on a preset encapsulation rule, for example, a Mismatch packet encapsulated by using a general network virtualization encapsulation protocol, and then may send the first packet to the slow forwarding plane, for requesting the slow forwarding plane to perform service processing corresponding to the NFV network element, and then send a processing result to the fast forwarding plane for configuring a fast forwarding table entry.
In an embodiment of the present invention, before generating the first packet based on the preset encapsulation rule and sending the first packet to the slow forwarding plane, the method may further include:
the fast forwarding plane receives the flow data and judges whether a corresponding fast forwarding table item is configured or not; and under the condition that the corresponding fast forwarding table item is not configured, the fast forwarding plane executes the generation of the first message based on the preset encapsulation rule and sends the first message to the slow forwarding plane.
As an example, the fast forwarding table entry may be used to guide the content of the message processing, such as including NAT rules, packet encapsulation information, interface information for the outgoing message, etc.
In a specific implementation, the traffic data of other VPCs can be introduced into a fast forwarding plane in the NFV network element through an ENI-bonding technology, and the fast forwarding plane searches a fast forwarding table entry to perform fast forwarding of the message.
If the fast forwarding plane does not find the fast forwarding table entry, a Mismatch message is constructed on the fast forwarding plane, and the Mismatch message can be encapsulated into a first message based on a preset encapsulation rule, for example, the first message is encapsulated by adopting a general network virtualization encapsulation protocol, and then the first message can be sent to the slow forwarding plane in the NFV network element from the fast forwarding plane.
Step 202, the fast forwarding plane receives a second message generated by the slow forwarding plane based on a preset encapsulation rule, and configures a fast forwarding table item according to the second message, so as to fast forward the received flow data according to the fast forwarding table item; the second message contains relevant information for configuring the fast forwarding table entry.
The second message is an Offload message (downlink message) encapsulated by adopting a preset encapsulation rule, for example, the Offload message (second message) is encapsulated by adopting a general network virtualization encapsulation protocol, and refers to that after the slow forwarding plane receives a Mismatch message of the fast forwarding plane, protocol and service processing are performed, and then the modified content of the message is transmitted to the fast forwarding plane through the Offload message.
After receiving the first message, the slow forwarding plane can perform service logic processing on the message, and after the service logic is processed, the slow forwarding plane informs the fast forwarding plane of a processing result through an Offload message, and the fast forwarding plane can package the first message into a second message based on a preset packaging rule so that the fast forwarding plane can perform subsequent fast forwarding.
In an embodiment of the present invention, the method may further include:
the fast forwarding plane generates a third message based on a preset encapsulation rule and sends the third message to the slow forwarding plane; the third message contains flow statistical information in the forwarding process.
The third message is a Report message (synchronous message) encapsulated by adopting a preset encapsulation rule, for example, the Report message (third message) is encapsulated by adopting a universal network virtualization encapsulation protocol, and the Report message (third message) refers to that the fast forwarding plane informs the information of own message traffic and the like to the slow forwarding plane for the operations of Debug, charging and the like.
In the forwarding process, the fast forwarding plane can record flow statistics information, such as the number of received messages, the number of sent messages, the flow size, the number of flow bytes and the like, and then can upload the statistics information to the slow forwarding plane through Report messages, and the statistics information can be packaged into a third message based on preset packaging rules, such as a general network virtualization packaging protocol, so that the operations of Debug, charging and the like can be conveniently carried out on the slow forwarding plane.
In a specific implementation, the first message, the second message, and the third message respectively correspond to a Mismatch message (send message), an Offload message (send message), and a Report message (synchronous message), which are generated based on flows, that is, five-tuple formed by a source IP, a destination IP, a protocol number, a source port, and a destination port is a flow, forwarding of one flow only processes in a fast forwarding plane, and when the fast forwarding plane is not configured with a corresponding fast forwarding table item, interaction of the first message, the second message, and the third message with a control plane (that is, a slow forwarding plane) is required, that is, the first message, the second message, and the third message are control plane interaction messages based on flow forwarding.
In an embodiment of the present invention, in a packet generated based on a preset encapsulation rule, if a general network virtualization encapsulation protocol is adopted for encapsulation, the format is as follows: the GENEVE IPv4+ UDP + GENEVE header further comprises GENEVE Option Class =0x138 field and GENEVE Option Class exclusive field, and information such as UNI (User Network Interface ), NNI (Network to Network Interface, network node interface), service SD Cookie and XNI Mapping is available in the Option, so that flexible expansion can be performed.
Specifically, a message generated based on a preset encapsulation rule (for example, encapsulation by adopting a general network virtualization encapsulation protocol) is wholly divided into 4 parts:
1. an outer IPV4 header portion containing the source IP, the destination IP, i.e., the IP of the PT plane, the SD plane.
2. And a UDP part for representing a GENEVE message.
3. Carrying the detailed information of Mismatch, offload, report and other messages.
4. Original payload data is used for forwarding the first packet, missmatch and Offload messages must be carried, and Report messages are not required.
The following details the fields in the message generated based on the preset encapsulation rule (for example, encapsulation using the general network virtualization encapsulation protocol):
Version (2 bit): version number, currently defaulting to 0.
Opt Len (6 bit): the length of the Variable Length Options field is indicated in units of 4 bytes. Since only 6bit,Variable Length Options is at most 252 (63 x 4) bytes.
O (1 bit): indicating that this is an OAM (Operation Administration and Maintenance, operation and maintenance administration) packet containing control information rather than data. Currently defaulting to 0, unused.
C (1 bit): indicating that within Variable Length Options, there are one or more important options (criticaloptions). When C is set, variable Length Options must be parsed. Currently defaulting to 0, unused.
Rsvd (6 bit): a field is reserved.
Protocol Type (16 bit): encapsulated protocol type.
VNI (24 bit): virtual network identification.
Reserved (8 bit): a field is reserved.
Variable Length Options: consists of TLV (Tag, length, value, data type, data length, data value) containing scalable metadata.
Option Class (16 bit): the general option category.
Type (8 bit): the Option type.
Rsvd (3 bit): a field is reserved.
length (5 bit): TLV value length.
In an embodiment of the present invention, in a packet generated based on a preset encapsulation rule, a data type field is determined according to a type of a network function virtual network element, a data value field is determined according to interaction information between a fast forwarding plane and a slow forwarding plane in the network function virtual network element, and a data length field may also be included.
Specifically, the fast forwarding plane and the slow forwarding plane in the NFV network element can use the gene message to perform interaction, and the flexibility of Type (data Type), length (data Length) and Value (data Value) in the gene message is fully utilized to carry complex Mismatch, offload, report message information.
For example, if the network element 1 is to carry the interaction information 1 through a message, then type= A, value =information 1, and if the network element 2 is to carry the interaction information 2 through a message, then type= B, value =information 2, so that each service only care about the own message Type, length, value, and different services do not affect each other.
In the embodiment of the invention, the network function virtualization network element is provided with the fast forwarding plane and the slow forwarding plane, the fast forwarding plane and the slow forwarding plane are deployed in different cloud server clusters, the fast forwarding plane generates a first message based on a preset encapsulation rule and sends the first message to the slow forwarding plane, then receives a second message generated by the slow forwarding plane based on the preset encapsulation rule, configures a fast forwarding table entry according to the second message, and fast forwards the received flow data according to the fast forwarding table entry, thereby realizing information interaction between the fast forwarding plane and the slow forwarding plane based on the preset encapsulation rule, and improving flexibility and expansibility
Referring to fig. 3, a flowchart illustrating steps of another method for message interaction according to an embodiment of the present invention may specifically include the following steps:
in step 301, the fast forwarding plane receives the traffic data and determines whether a corresponding fast forwarding entry is configured.
Referring to fig. 4, a flowchart of steps of another method for message interaction according to an embodiment of the present invention is shown, where the method may be applied to network function virtualization network elements.
Wherein the network function virtualized network element comprises a virtualized network element for implementing any one of the following network functions: server load balancing, network load balancing, gateway load balancing, network address translation and forwarding routing.
In order to realize a mechanism of separating fast forwarding from slow forwarding in a forwarding system of an SDN, a network function virtualization network element can be deployed with a fast forwarding plane and a slow forwarding plane, the fast forwarding plane and the slow forwarding plane are deployed in different cloud server clusters, and the separation deployment is carried out through different resource pools, so that the purposes of improving the resource utilization rate, reducing the cost, reducing the fault influence surface and the like can be achieved.
As shown in fig. 1, the fast forwarding plane is a PT plane, which has message forwarding function logic, and the slow forwarding plane is an SD plane, which has service function logic for generating fast forwarding entries, including first packet triggering and service configuration.
The slow forwarding plane may be used for performing protocol and service processing, for example, for a network function virtualized network element implementing NAT function, where the protocol and service processing is message address conversion, and the slow forwarding plane needs to notify a fast forwarding plane of a processed result, so as to direct forwarding of a fast forwarding message, where information to be exchanged between the two planes may include an outgoing interface of the message, how the message is modified (an NFV network element implementing NAT function needs to perform address conversion), how the message is packaged, and so on.
Specifically, the method comprises the following steps:
step 401, a slow forwarding plane receives a first message generated by a fast forwarding plane based on a preset encapsulation rule; the first message is used for requesting to generate a fast forwarding table item; the report generated based on the preset encapsulation rule has a data type field and a data value field for carrying interaction information, and different data types correspond to different network function virtualization network elements.
The first message is a Mismatch message (downlink message) encapsulated by a preset encapsulation rule, for example, a general network virtualization encapsulation protocol is used for encapsulation, where the Mismatch message (first message) refers to a first message of a fast forwarding plane without a forwarding table item, and is to be forwarded to a slow forwarding plane.
When the fast forwarding plane is to interact with the slow forwarding plane, the fast forwarding plane may generate a first packet based on a preset encapsulation rule, for example, a Mismatch packet encapsulated by using a general network virtualization encapsulation protocol, and then may send the first packet to the slow forwarding plane, for requesting the slow forwarding plane to perform service processing corresponding to the NFV network element, and then send a processing result to the fast forwarding plane for configuring a fast forwarding table entry.
In a specific implementation, the traffic data of other VPCs can be introduced into a fast forwarding plane in the NFV network element through an ENI-bonding technology, and the fast forwarding plane searches a fast forwarding table entry to perform fast forwarding of the message.
If the fast forwarding plane does not find the fast forwarding table entry, a Mismatch message is constructed on the fast forwarding plane, and the Mismatch message can be encapsulated into a first message based on a preset encapsulation rule, for example, the first message is encapsulated by adopting a general network virtualization encapsulation protocol, and then the first message can be sent to the slow forwarding plane in the NFV network element from the fast forwarding plane.
Step 402, the slow forwarding plane generates a second message based on a preset encapsulation rule, and sends the second message to the fast forwarding plane, so that the fast forwarding plane configures a fast forwarding table item according to the second message, and fast forwards the received traffic data according to the fast forwarding table item; the second message contains relevant information for configuring the fast forwarding table entry.
The second message is an Offload message (downlink message) encapsulated by adopting a preset encapsulation rule, for example, the Offload message (second message) is encapsulated by adopting a general network virtualization encapsulation protocol, and refers to that after the slow forwarding plane receives a Mismatch message of the fast forwarding plane, protocol and service processing are performed, and then the modified content of the message is transmitted to the fast forwarding plane through the Offload message.
After receiving the first message, the slow forwarding plane can perform service logic processing on the message, and after the service logic is processed, the slow forwarding plane informs the fast forwarding plane of a processing result through an Offload message, and the fast forwarding plane can package the first message into a second message based on a preset packaging rule, for example, a general network virtualization packaging protocol is adopted for packaging, so that the fast forwarding plane performs subsequent fast forwarding.
In an embodiment of the present invention, the method may further include:
the slow forwarding plane receives a third message generated by the fast forwarding plane based on a preset encapsulation rule; the third message contains flow statistical information in the forwarding process.
The third message is a Report message (synchronous message) encapsulated by adopting a preset encapsulation rule, for example, the Report message (third message) is encapsulated by adopting a universal network virtualization encapsulation protocol, and the Report message (third message) refers to that the fast forwarding plane informs the information of own message traffic and the like to the slow forwarding plane for the operations of Debug, charging and the like.
In the forwarding process, the fast forwarding plane can record flow statistics information, such as the number of received messages, the number of sent messages, the flow size, the number of flow bytes and the like, and then can upload the statistics information to the slow forwarding plane through Report messages, and the statistics information can be packaged into a third message based on preset packaging rules, such as a general network virtualization packaging protocol, so that the operations of Debug, charging and the like can be conveniently carried out on the slow forwarding plane.
In a specific implementation, the first message, the second message, and the third message respectively correspond to the Mismatch message, the Offload message, and the Report message, which are generated based on flows, that is, five-tuple formed by the source IP, the destination IP, the protocol number, the source port, and the destination port is a flow, forwarding of one flow only processes in the fast forwarding plane, and when the fast forwarding plane is not configured with a corresponding fast forwarding table entry, interaction of the first message, the second message, and the third message needs to be performed with the control plane (that is, the slow forwarding plane), that is, the first message, the second message, and the third message are control plane interaction messages based on flow forwarding.
In an embodiment of the present invention, in a message generated based on a preset encapsulation rule (for example, encapsulation using a general network virtualization encapsulation protocol), the format is as follows: the GENEVE IPv4+ UDP + GENEVE header, in addition, the GENEVE header also comprises GENEVE Option Class =0x138 field and GENEVE Option Class exclusive field, and the Option has information such as UNI, NNI, service SD Cookie, XNI Mapping and the like, so that flexible expansion can be performed.
Specifically, a message generated based on a preset encapsulation rule (for example, encapsulation by adopting a general network virtualization encapsulation protocol) is wholly divided into 4 parts:
1. An outer IPV4 header portion containing the source IP, the destination IP, i.e., the IP of the PT plane, the SD plane.
2. And a UDP part for representing a GENEVE message.
3. Carrying the detailed information of Mismatch, offload, report and other messages.
4. Original payload data is used for forwarding the first packet, missmatch and Offload messages must be carried, and Report messages are not required.
The following details the fields in the message generated based on the preset encapsulation rule (for example, encapsulation using the general network virtualization encapsulation protocol):
version (2 bit): version number, currently defaulting to 0.
Opt Len (6 bit): the length of the Variable Length Options field is indicated in units of 4 bytes. Since only 6bit,Variable Length Options is at most 252 (63 x 4) bytes.
O (1 bit): indicating that this is an OAM packet containing control information rather than data. Currently defaulting to 0, unused.
C (1 bit): indicating that within Variable Length Options, there are one or more important options (criticaloptions). When C is set, variable Length Options must be parsed. Currently defaulting to 0, unused.
Rsvd (6 bit): a field is reserved.
Protocol Type (16 bit): encapsulated protocol type.
VNI (24 bit): virtual network identification.
Reserved (8 bit): a field is reserved.
Variable Length Options: consists of TLV (Tag, length, value, data type, data length, data value) containing scalable metadata.
Option Class (16 bit): the general option category.
Type (8 bit): the Option type.
Rsvd (3 bit): a field is reserved.
length (5 bit): TLV value length.
In an embodiment of the present invention, in a packet generated based on a preset encapsulation rule, a data type field is determined according to a type of a network function virtual network element, a data value field is determined according to interaction information between a fast forwarding plane and a slow forwarding plane in the network function virtual network element, and a data length field may also be included.
Specifically, the fast forwarding plane and the slow forwarding plane in the NFV network element can use the gene message to perform interaction, and the flexibility of Type (data Type), length (data Length) and Value (data Value) in the gene message is fully utilized to carry complex Mismatch, offload, report message information.
For example, if the network element 1 is to carry the interaction information 1 through a message, then type= A, value =information 1, and if the network element 2 is to carry the interaction information 2 through a message, then type= B, value =information 2, so that each service only care about the own message Type, length, value, and different services do not affect each other.
In the embodiment of the invention, the network function virtualization network element is provided with the fast forwarding plane and the slow forwarding plane, the fast forwarding plane and the slow forwarding plane are deployed in different cloud server clusters, the slow forwarding plane receives the first message generated by the fast forwarding plane based on the preset encapsulation rule, generates the second message based on the preset encapsulation rule and sends the second message to the fast forwarding plane, so that the fast forwarding plane configures the fast forwarding table item according to the second message and carries out fast forwarding on the received traffic data according to the fast forwarding table item, thereby realizing information interaction between the fast forwarding plane and the slow forwarding plane based on the preset encapsulation rule and improving flexibility and expansibility.
Referring to fig. 5, a flowchart illustrating steps of another method for message interaction according to an embodiment of the present invention may specifically include the following steps:
It should be noted that, for simplicity of description, the method embodiments are shown as a series of acts, but it should be understood by those skilled in the art that the embodiments are not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred embodiments, and that the acts are not necessarily required by the embodiments of the invention.
The network function virtualization network element provided by the embodiment of the invention is provided with a fast forwarding plane and a slow forwarding plane, wherein the fast forwarding plane and the slow forwarding plane are deployed in different cloud server clusters, and the fast forwarding plane is used for:
Generating a first message based on a preset encapsulation rule, and sending the first message to the slow forwarding plane; the first message is used for requesting to generate a fast forwarding table item; the report generated based on the preset encapsulation rule has a data type field and a data value field for carrying interaction information, and different data types correspond to different network function virtualization network elements;
receiving a second message generated by the slow forwarding plane based on a preset encapsulation rule, and configuring a fast forwarding table item according to the second message so as to fast forward the received flow data according to the fast forwarding table item; the second message contains relevant information for configuring the fast forwarding table entry.
In one embodiment of the present invention, the method is further used for:
generating a third message based on a preset encapsulation rule, and sending the third message to the slow forwarding plane; the third message contains flow statistical information in the forwarding process.
In an embodiment of the present invention, in the packet generated based on the preset encapsulation rule, the data type field is determined according to a type of the network function virtual network element, and the data value field is determined according to interaction information between a fast forwarding plane and a slow forwarding plane in the network function virtual network element.
In an embodiment of the present invention, before the generating the first packet based on the preset encapsulation rule and sending the first packet to the slow forwarding plane, the method is further used for:
receiving flow data and judging whether a corresponding quick forwarding table item is configured or not;
and under the condition that the corresponding fast forwarding table entry is not configured, executing the first message generated based on the preset encapsulation rule, and sending the first message to the slow forwarding plane.
In an embodiment of the present invention, the fast forwarding plane has message forwarding function logic, and the slow forwarding plane has service function logic for generating a fast forwarding table entry.
In an embodiment of the present invention, the network function virtualization network element includes a virtualization network element for implementing any one of the following network functions:
server load balancing, network load balancing, gateway load balancing, network address translation and forwarding routing.
In the embodiment of the invention, the network function virtualization network element is provided with the fast forwarding plane and the slow forwarding plane, the fast forwarding plane and the slow forwarding plane are deployed in different cloud server clusters, the fast forwarding plane generates the first message based on the preset encapsulation rule and sends the first message to the slow forwarding plane, then receives the second message generated by the slow forwarding plane based on the preset encapsulation rule, and configures the fast forwarding table according to the second message so as to fast forward the received flow data according to the fast forwarding table, thereby realizing information interaction between the fast forwarding plane and the slow forwarding plane based on the preset encapsulation rule and improving flexibility and expansibility.
The network function virtualization network element provided by the embodiment of the invention is provided with a fast forwarding plane and a slow forwarding plane, wherein the fast forwarding plane and the slow forwarding plane are deployed in different cloud server clusters, and the slow forwarding plane is used for:
receiving a first message generated by the fast forwarding plane based on a preset encapsulation rule; the first message is used for requesting to generate a fast forwarding table item; the report generated based on the preset encapsulation rule has a data type field and a data value field for carrying interaction information, and different data types correspond to different network function virtualization network elements;
generating a second message based on a preset encapsulation rule, and sending the second message to the fast forwarding plane, so that the fast forwarding plane configures a fast forwarding table item according to the second message, and fast forwards the received flow data according to the fast forwarding table item; the second message contains relevant information for configuring the fast forwarding table entry.
In one embodiment of the present invention, the method is further used for:
receiving a third message generated by the fast forwarding plane based on a preset encapsulation rule; the third message contains flow statistical information in the forwarding process.
In an embodiment of the present invention, in the packet generated based on the preset encapsulation rule, the data type field is determined according to a type of the network function virtual network element, and the data value field is determined according to interaction information between a fast forwarding plane and a slow forwarding plane in the network function virtual network element.
In an embodiment of the present invention, the fast forwarding plane has message forwarding function logic, and the slow forwarding plane has service function logic for generating a fast forwarding table entry.
In an embodiment of the present invention, the network function virtualization network element includes a virtualization network element for implementing any one of the following network functions:
server load balancing, network load balancing, gateway load balancing, network address translation and forwarding routing.
In the embodiment of the invention, the network function virtualization network element is provided with the fast forwarding plane and the slow forwarding plane, the fast forwarding plane and the slow forwarding plane are deployed in different cloud server clusters, the slow forwarding plane receives the first message generated by the fast forwarding plane based on the preset encapsulation rule, generates the second message based on the preset encapsulation rule and sends the second message to the fast forwarding plane, so that the fast forwarding plane configures the fast forwarding table item according to the second message and carries out fast forwarding on the received traffic data according to the fast forwarding table item, thereby realizing information interaction between the fast forwarding plane and the slow forwarding plane based on the preset encapsulation rule and improving flexibility and expansibility.
An embodiment of the present invention further provides an electronic device, which may include a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the computer program is executed by the processor to implement a method for interaction of messages as described above.
An embodiment of the present invention further provides a computer readable storage medium, where a computer program is stored, where the computer program when executed by a processor implements a method for interaction of messages as described above.
For the device embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference is made to the description of the method embodiments for relevant points.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.
It will be apparent to those skilled in the art that embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the invention may take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or terminal device comprising the element.
The above description of a method for message interaction and network function virtualization network element is provided, and specific examples are applied to illustrate the principles and embodiments of the present invention, where the above description of the embodiments is only for helping to understand the method and core ideas of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (12)
1. The method is characterized by being applied to a fast forwarding plane in a network function virtualization network element, wherein the network function virtualization network element is deployed with a fast forwarding plane and a slow forwarding plane, and the fast forwarding plane and the slow forwarding plane are deployed in different cloud server clusters, and the method comprises the following steps:
the fast forwarding plane generates a first message based on a preset encapsulation rule and sends the first message to the slow forwarding plane; the first message is used for requesting to generate a fast forwarding table item; the report generated based on the preset encapsulation rule has a data type field and a data value field for carrying interaction information, and different data types correspond to different network function virtualization network elements;
The fast forwarding plane receives a second message generated by the slow forwarding plane based on a preset encapsulation rule, and configures a fast forwarding table item according to the second message so as to fast forward the received flow data according to the fast forwarding table item; the second message contains relevant information for configuring the fast forwarding table entry.
2. The method as recited in claim 1, further comprising:
the fast forwarding plane generates a third message based on a preset encapsulation rule and sends the third message to the slow forwarding plane; the third message contains flow statistical information in the forwarding process.
3. The method according to claim 1 or 2, wherein in the message generated based on a preset encapsulation rule, the data type field is determined according to the type of the network function virtual network element, and the data value field is determined according to interaction information between a fast forwarding plane and a slow forwarding plane in the network function virtual network element.
4. The method of claim 3, further comprising, prior to said generating a first message based on a preset encapsulation rule and sending said first message to said slow forwarding plane:
The fast forwarding plane receives the flow data and judges whether a corresponding fast forwarding table item is configured or not;
and under the condition that the corresponding fast forwarding table item is not configured, the fast forwarding plane executes the first message generated based on the preset encapsulation rule and sends the first message to the slow forwarding plane.
5. The method of claim 1, wherein the fast forwarding plane is provided with message forwarding function logic and the slow forwarding plane is provided with service function logic that generates fast forwarding entries.
6. The method according to claim 1, wherein the network function virtualization network element comprises a virtualization network element for implementing any one of the following network functions:
server load balancing, network load balancing, gateway load balancing, network address translation and forwarding routing.
7. The method is characterized by being applied to a slow forwarding plane in a network function virtualization network element, wherein the network function virtualization network element is deployed with a fast forwarding plane and a slow forwarding plane, and the fast forwarding plane and the slow forwarding plane are deployed in different cloud server clusters, and the method comprises the following steps:
The slow forwarding plane receives a first message generated by the fast forwarding plane based on a preset encapsulation rule; the first message is used for requesting to generate a fast forwarding table item; the report generated based on the preset encapsulation rule has a data type field and a data value field for carrying interaction information, and different data types correspond to different network function virtualization network elements;
the slow forwarding plane generates a second message based on a preset encapsulation rule, and sends the second message to the fast forwarding plane, so that the fast forwarding plane configures a fast forwarding table item according to the second message, and fast forwards received flow data according to the fast forwarding table item; the second message contains relevant information for configuring the fast forwarding table entry.
8. The method as recited in claim 7, further comprising:
the slow forwarding plane receives a third message generated by the fast forwarding plane based on a preset encapsulation rule; the third message contains flow statistical information in the forwarding process.
9. A network function virtualization network element, wherein the network function virtualization network element is deployed with a fast forwarding plane and a slow forwarding plane, the fast forwarding plane and the slow forwarding plane are deployed in different cloud server clusters, and the fast forwarding plane is configured to:
Generating a first message based on a preset encapsulation rule, and sending the first message to the slow forwarding plane; the first message is used for requesting to generate a fast forwarding table item; the report generated based on the preset encapsulation rule has a data type field and a data value field for carrying interaction information, and different data types correspond to different network function virtualization network elements;
receiving a second message generated by the slow forwarding plane based on a preset encapsulation rule, and configuring a fast forwarding table item according to the second message so as to fast forward the received flow data according to the fast forwarding table item; the second message contains relevant information for configuring the fast forwarding table entry.
10. A network function virtualization network element, wherein the network function virtualization network element is deployed with a fast forwarding plane and a slow forwarding plane, the fast forwarding plane and the slow forwarding plane are deployed in different cloud server clusters, and the slow forwarding plane is configured to:
receiving a first message generated by the fast forwarding plane based on a preset encapsulation rule; the first message is used for requesting to generate a fast forwarding table item; the report generated based on the preset encapsulation rule has a data type field and a data value field for carrying interaction information, and different data types correspond to different network function virtualization network elements;
Generating a second message based on a preset encapsulation rule, and sending the second message to the fast forwarding plane, so that the fast forwarding plane configures a fast forwarding table item according to the second message, and fast forwards the received flow data according to the fast forwarding table item; the second message contains relevant information for configuring the fast forwarding table entry.
11. An electronic device comprising a processor, a memory and a computer program stored on the memory and capable of running on the processor, which when executed by the processor implements the method of message interaction of any of claims 1 to 8.
12. A computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, which computer program, when executed by a processor, implements the method of message interaction according to any of claims 1 to 8.
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