CN104780232B - A kind of resource allocation methods, controller and system - Google Patents

Abstract

The present invention provides a resource allocation method, controller, and system, wherein a resource allocation method includes: the controller Controller receives a flow table establishment request message, and the flow table establishment request message includes information allocated for the flow table entries that need to be established. A resource application identifier and a flow table entry identifier, the resource application identifier is used to indicate the resources that the Controller needs to allocate, and the flow table entry identifier is the identifier of the flow table entry that needs to be established; according to the resource application identifier, allocate resource information, so that the forwarding device establishes the flow table entry according to the allocated resource information, so as to realize the unified allocation of resources used by the transition technologies by the controller, so that each transition technology can share an address pool to realize centralized management of resources, and then When resource allocation is performed, resources can be obtained from the shared address pool for allocation, avoiding waste of resources caused by using independent address pools for each transition technology.

Description

A resource allocation method, controller and system

technical field

The present invention relates to the field of transition technology, in particular to a resource allocation method, controller and system.

Background technique

During the evolution process from Internet Protocol version 4 (Internet Protocol version 4, IPv4) network to Internet Protocol version 6 (Internet Protocol version 6, IPv6) network, there are various IPv6 evolution technologies, such as lightweight dual stack (Dual Stack Lite, DS -lite), IPv4 to IPv4 network address translation (Network AddressTranslation4to4, NAT44) and lightweight IPv6 transition (Light-weight4over6, LW4over6) and other transition technologies. During the transition from IPv4 to IPv6, the application (Application, APP) of each transition technology needs to independently allocate addresses for it, and each APP runs on a corresponding server.

In the prior art, when an APP of each transition technology generates a flow table establishment request message, it obtains resources from its corresponding address pool for allocation. For example, when performing resource allocation for an NAT44 APP, it needs to use the Obtain the Internet Protocol (IP) address and the source port of the external network from the address pool; when allocating resources for LW4over6, it is necessary to obtain the external network source IP from the address pool used by the APP of LW4over6 Address and external network source port range.

Since a fixed address segment is currently assigned to each transitional technology APP, the address pools of each transitional technology APP are independent of each other, which may cause a phenomenon that the IP address of a certain transitional technology APP is insufficient, while the IP addresses of other transitional technology APPs are idle. , resulting in a waste of IP addresses.

Contents of the invention

The embodiment of the present invention provides a resource allocation method, a controller and a system, which are used to solve the technical problem of IP address waste caused by the existing resource allocation mode. The technical solution is as follows:

In the first aspect, an embodiment of the present invention provides a method for resource allocation, which is applicable to a control-forwarding separation network, and the method includes:

The controller (Controller) receives a flow table establishment request message, the flow table establishment request message includes a resource application identifier and a flow table entry identifier allocated for the flow table entry to be established, and the resource application identifier is used to indicate the The controller needs to allocate resources, and the flow table entry identifier is the identifier of the flow table entry that needs to be established;

Allocating resource information according to the resource application identifier, where the resource information includes an Internet Protocol IP address, or, the resource information includes an IP address and a port;

Sending the allocated resource information to the forwarding device, so that the forwarding device creates the flow table entry according to the allocated resource information.

In a first possible implementation manner of the first aspect, the receiving the flow table establishment request message includes:

The flow table establishment request message sent by the server is received, and the flow table establishment request message further includes user attribute information, and the user attribute information includes the user's intranet source IP address and intranet source port information.

With reference to the first aspect or the first feasible implementation manner of the first aspect, the sending the allocated resource information to the forwarding device includes:

Adding the resource information to the flow table establishment request message corresponding to the flow table entry identifier, and forwarding the flow table establishment request message added with the resource information to the forwarding device.

In a second feasible implementation manner of the first aspect, the receiving the flow table establishment request message includes:

receiving the flow table establishment request message sent by the forwarding device;

The sending the allocated resource information to the forwarding device includes:

Sending the resource information and the flow table entry identifier to the forwarding device, and the forwarding device creates the flow table entry according to the resource information.

In combination with the first aspect or the first possible implementation of the first aspect or the second possible implementation of the first aspect, in the third possible implementation of the first aspect, the flow table creation request message is a form filling flow table establishment request message, the form-filling flow table establishment request message specifically includes: pre-reserving storage space for storing the resource information in the flow table establishment request message, and allocating the After the resource information is obtained, the resource information is filled in the storage space corresponding to the resource information.

In combination with the first aspect or the first feasible implementation manner of the first aspect or the second feasible implementation manner of the first aspect, in the fourth feasible implementation manner of the first aspect, the method further includes:

When it is detected that the survival time of the flow table entry exceeds the preset time threshold, recycle the allocated resource information, and send a flow table deletion message to the forwarding device, so that the forwarding device deletes the flow table entry.

In the second aspect, the embodiment of the present invention provides a Controller, and the Controller is suitable for a control-forwarding separation network, including:

A receiving unit, configured to receive a flow table establishment request message, the flow table establishment request message including a resource application identifier and a flow table entry identifier allocated for the flow table entry to be established, and the resource application identifier is used to indicate the The controller needs to allocate resources, and the flow table entry identifier is the identifier of the flow table entry that needs to be established;

An allocating unit, configured to allocate resource information according to the resource application identifier, where the resource information includes an Internet Protocol IP address, or, the resource information includes an IP address and a port;

A sending unit, configured to send the allocated resource information to a forwarding device, so that the forwarding device creates the flow table entry according to the allocated resource information.

In the first possible implementation manner of the second aspect, the receiving unit is specifically configured to receive the flow table establishment request message by the receiving unit specifically including:

The flow table establishment request message sent by the server is received, and the flow table establishment request message further includes user attribute information, and the user attribute information includes the user's intranet source IP address and intranet source port information.

With reference to the second aspect or the first feasible implementation manner of the second aspect, the sending unit sends the allocated resource information to the forwarding device, specifically including:

Adding the resource information to the flow table establishment request message corresponding to the flow table entry identifier, and forwarding the flow table establishment request message added with the resource information to the forwarding device.

In a second feasible implementation manner of the second aspect, the receiving unit receiving the flow table establishment request message specifically includes;

receiving the flow table establishment request message sent by the forwarding device;

The sending unit sends the allocated resource information to the forwarding device, specifically including:

Sending the resource information and the flow table entry identifier to the forwarding device, and the forwarding device creates the flow table entry according to the resource information.

In combination with the second aspect or the first possible implementation of the second aspect or the second possible implementation of the second aspect, in the third possible implementation of the second aspect, the flow table creation request message is a form filling A flow table establishment request message, the form-filling flow table establishment request message is specifically: the storage space for storing the resource information is pre-reserved in the flow table establishment request message, and the controller will allocate After the resource information, fill in the resource information in the corresponding storage space of the resource information.

In combination with the second aspect or the first feasible implementation manner of the second aspect or the second feasible implementation manner of the second aspect, in the fourth feasible implementation manner of the second aspect, the Controller further includes:

a detection unit, configured to detect the survival time of the flow table entry;

A reclaiming unit, configured to reclaim the allocated resource information when the detecting unit detects that the survival time of the flow table entry exceeds a preset time threshold;

The sending unit is further configured to send a flow table deletion message to the forwarding device when the detecting unit detects that the survival time of the flow table entry exceeds the preset time threshold, so that the forwarding device deletes the flow table entry. The flow table entry.

In the third aspect, the embodiment of the present invention further provides a resource allocation system, the system includes a Controller and a forwarding device, wherein,

The Controller is configured to receive a flow table establishment request message, where the flow table establishment request message includes a resource application identifier and a flow table entry identifier allocated for the flow table entry to be established, and the resource application identifier is used to indicate the The resource that the Controller needs to allocate, the flow table entry identifier is the identifier of the flow table entry that needs to be established; according to the resource application identifier, resource information is allocated, and the resource information includes an Internet Protocol IP address, or , the resource information includes an IP address and a port; sending the allocated resource information to a forwarding device, so that the forwarding device creates the flow table entry according to the allocated resource information;

The forwarding device is configured to receive the resource information sent by the Controller, and create the flow table entry according to the resource information.

In a first possible implementation manner of the third aspect, the system further includes: a server, where the server is configured to generate and send a flow table establishment request message;

The server is configured to generate and send the flow table establishment request message;

The Controller is specifically configured to receive the flow table establishment request message sent by the server, allocate resource information according to the resource application identifier, and add the resource information to the flow table corresponding to the flow table entry identifier In the establishment request message, and forward the flow table establishment request message added with the resource information to the forwarding device, the flow table establishment request message also includes user attribute information, and the user attribute information includes user content Network source IP address and intranet source port information;

The forwarding device is specifically configured to receive the flow table establishment request message added with the resource information sent by the Controller, and establish the flow table according to the flow table establishment request message added with the resource information item.

In a second possible implementation manner of the third aspect, the system further includes a server, the server is configured to generate and send a flow table establishment message to the forwarding device, and the flow table establishment message is used to indicate the establishment of a flow A table entry, the flow table establishment message includes user attribute information, and the user attribute information includes the user's intranet source IP address and intranet source port information;

The forwarding device is further configured to receive the flow table establishment message sent by the server, generate the flow table establishment request message according to the flow table establishment message, and send the flow table establishment request message to the Controller ;

The Controller is specifically configured to receive the flow table establishment request message sent by the forwarding device, allocate resource information according to the resource application identifier, and send the resource information and the flow table entry identifier to the Forwarding equipment;

The forwarding device is specifically configured to receive the resource information sent by the Controller, and create the flow table entry according to the resource information.

Through the resource allocation method provided by the above technical solution, the Controller can receive the flow table creation request message, and allocate resource information according to the resource application identifier in the flow table creation request message, so as to realize the unified allocation of resources used by the transition technologies by the controller In this way, each transition technology can share one address pool to realize centralized management of resources, and then resources can be obtained from the shared address pool for allocation during resource allocation, avoiding resource waste caused by each transition technology using an independent address pool.

Description of drawings

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

FIG. 1 is a schematic flowchart of a resource allocation method provided by an embodiment of the present invention;

FIG. 2 is a schematic framework diagram of a resource allocation system provided by an embodiment of the present invention;

Fig. 3 is the realization schematic diagram of the system shown in Fig. 2;

FIG. 4 is a schematic flowchart of a resource allocation method based on the system shown in FIG. 3;

FIG. 5 is an example diagram of a resource allocation method provided by an embodiment of the present invention;

Fig. 6 is the realization schematic diagram of the system shown in Fig. 2;

FIG. 7 is a schematic flowchart of a resource allocation method based on the system shown in FIG. 3;

FIG. 8 is an example diagram of a resource allocation method provided by an embodiment of the present invention;

FIG. 9 is an example diagram of a resource allocation method provided by an embodiment of the present invention;

FIG. 10 is an example diagram of a resource allocation method provided by an embodiment of the present invention;

FIG. 11 is a schematic flowchart of a resource allocation method provided by an embodiment of the present invention;

Fig. 12 is a schematic structural diagram of a controller provided by an embodiment of the present invention;

Fig. 13 is a schematic structural diagram of a controller provided by an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Referring to Fig. 1, an embodiment of the present invention provides a method for resource allocation, which is applicable to a control-forwarding separation network, and the method may be executed by a controller in the network, or may be executed by other network devices , in the embodiment of the present invention, the Controller is used as an example for description, and the method includes:

101: The Controller receives a flow table establishment request message, the flow table establishment request message includes a resource application identifier and a flow table entry identifier allocated for the flow table entry to be established, and the resource application identifier is used to indicate that the Controller needs to resources allocated, the flow table entry identifier is the identifier of the flow table entry that needs to be established.

In the embodiment of the present invention, the flow table establishment request message is used to instruct the forwarding device to establish a flow table entry, and before the forwarding device establishes a flow table entry, the Controller needs to allocate resource information for the flow table entry, so in this In the embodiment of the invention, the flow table establishment request message may include: a resource application identifier and a flow table entry identifier allocated for the flow table entry to be established.

Wherein, the resource application identifier is used to indicate the resource that needs to be allocated by the Controller, and the flow table entry identifier is an identifier of the flow table entry that needs to be established. A possible message format of the flow table establishment request message is shown in Table 1.

Table 1 The message format of the flow table establishment request message

Among them: the flow table operation type indicates the current operation on the flow table: the number 0 indicates a request to establish a flow table operation, and the number 1 indicates a request to delete a flow table operation; the operation sequence number is a feasible way to identify the flow table entry; the flow table attribute indicates the operation The type of the flow table: the number 0 indicates a one-way flow table, and the number 1 indicates a two-way flow table; the item attribute indicates the state of the item: the number 0 indicates an allocated item, and the number 1 indicates an unassigned item.

The content of the entry indicates the specific content included in the entry, which may include the resource application identifier used to indicate that the Controller needs to allocate resources. When the Controller allocates resources for apps with different transition technologies, the resource application identifiers are different, so the resource application identifiers of different transition technologies The contents of the entries corresponding to APP are different.

In some examples, the resource application identifier may include an IP address; in other examples, the resource application identifier may include an IP address and a port. For example, when allocating resources for the APP of the NAT44 transition technology, the content of the entry is as shown in Table 2, which may include: the source IP address of the internal network, the source port of the internal network, the source IP address of the external network and the source port of the external network.

Table 2 Contents of entries corresponding to NAT44

Intranet source IP address Intranet source port External network source IP address External network source port 192.168.1.1 2500 to be assigned to be allocated

Among them, the internal network source IP address and internal network source port are user attribute information, which have been allocated by the server where the NAT44 APP is located, and the external network source IP address and external network source port are the resource information that the Controller needs to allocate.

For example, when allocating resources for DS-Lite, which is a transitional technology app, the table items can include: IPv6 source address, intranet source IP address, intranet source port, external network source IP address, and external network source port, as shown in Table 3 shown;

Table 3 Contents of entries corresponding to DS-Lite

IPv6 source address Intranet source IP address Intranet source port External network source IP address External network source port 2008::1 192.168.1.1 2500 to be assigned to be assigned

Among them, the IPv6 source address, intranet source IP address and intranet source port are user attribute information, which have been allocated by the server where the DS-Lite APP is located, and the external network source IP address and external network source port are the resource information that the Controller needs to allocate .

Similarly, when allocating resources for the APP of the LW4over6 transition technology, the content of the entry may include: IPv6 source address, external network source IP address and external network source port segment.

102: Allocate resource information according to the resource application identifier, where the resource information includes an Internet Protocol IP address, or, the resource information includes an IP address and a port;

103: Send the allocated resource information to the forwarding device, so that the forwarding device creates the flow table entry according to the allocated resource information.

After receiving the flow table creation request message, the Controller allocates the corresponding resource information according to the resource application identifier, such as allocating the external network source IP address and external network source port for the APP of the NAT44 transition technology. In this way, the forwarding device can start the operation of establishing the flow table entry after obtaining the resource information, and complete the establishment of the flow table entry. The flow table entry is equivalent to a forwarding rule, and the information of each data packet can be obtained by querying the flow table entry. The forwarding destination forwards the data packet according to the flow table entry.

In the resource allocation method provided by the embodiment of the present invention, the Controller can receive the flow table establishment request message, and allocate resource information according to the resource application identifier in the flow table establishment request message, so as to realize the allocation of resources used by each transition technology by the controller. Unified allocation, so that each transition technology can share one address pool to achieve centralized management of resources, and then resources can be obtained from the shared address pool for allocation during resource allocation, avoiding resources caused by each transition technology using an independent address pool waste. And the Controller manages the resources used by each transition technology in a unified manner, so each APP can no longer integrate the resource allocation function, reducing the difficulty of writing each APP.

Referring to FIG. 2 , an embodiment of the present invention provides a resource allocation system 200, which includes a Controller 212 and a forwarding device 213, wherein,

The Controller 212 is configured to receive a flow table establishment request message, the flow table establishment request message includes a resource application identifier and a flow table entry identifier allocated for the flow table entry to be established, and the resource application identifier is used to indicate the The resource that the Controller needs to allocate, the flow table entry identifier is the identifier of the flow table entry that needs to be established; according to the resource application identifier, resource information is allocated, and the resource information includes an Internet Protocol IP address, or , the resource information includes an IP address and a port; sending the allocated resource information to a forwarding device, so that the forwarding device creates the flow table entry according to the allocated resource information;

The forwarding device 213 is configured to receive the resource information sent by the Controller 212, and create the flow table entry according to the resource information.

Optionally, the system also includes:

The first server is configured to generate and send the flow table establishment request message;

The Controller 212 is specifically configured to receive the flow table establishment request message sent by the first server, allocate resource information according to the resource application identifier, and add the resource information to the flow table entry identifier corresponding to the In the flow table establishment request message, and forward the flow table establishment request message added with the resource information to the forwarding device 213, the flow table establishment request message also includes user attribute information, and the user attribute information includes User's intranet source IP address and intranet source port information;

The forwarding device 213 is specifically configured to receive the flow table establishment request message added with the resource information sent by the Controller 212, and establish the flow table according to the flow table establishment request message added with the resource information entry.

Optionally, the system also includes:

The second server is configured to generate and send a flow table establishment message to the forwarding device, the flow table establishment message is used to indicate establishment of a flow table entry, the flow table establishment message includes user attribute information, and the user attribute information Including the user's intranet source IP address and intranet source port information;

The forwarding device 213 is further configured to receive the flow table establishment message sent by the second server, generate the flow table establishment request message according to the flow table establishment message, and send the flow table to the Controller Create a request message;

The Controller 212 is specifically configured to receive the flow table establishment request message sent by the forwarding device, allocate resource information according to the resource application identifier, and send the resource information and the flow table entry identifier to the Forwarding equipment;

The forwarding device 213 is specifically configured to receive the resource information sent by the Controller 212, and establish the flow table entry according to the resource information.

Referring to FIG. 3 , FIG. 3 is a schematic diagram of an implementation of the system shown in FIG. 2 . The system includes: a server 311, a Controller 312, and a forwarding device 313, wherein the server 311 is integrated with APPs of various transition technologies, which can generate and send flow table establishment request messages;

Controller 312, configured to receive the flow table establishment request message sent by the server 311, allocate corresponding resource information according to the resource application identifier in the flow table establishment request message, and add the allocated resource information to the flow table establishment request message, and add Change the flow table of the resource information and send the establishment request message to the forwarding device 313;

The forwarding device 313 is configured to receive the flow table establishment request message added with resource information sent by the Controller 312, and establish a flow table entry according to the flow table establishment request message added with resource information.

In the system framework shown in Figure 3, Controller 312 may include an address pool management interface and store address pools, wherein resources used by various transition technologies are integrated in the address pool, and Controller 312 may connect and run various transition technologies through the address pool management interface APP server 311 and forwarding device 313, and further obtain resource information from the address pool through the address pool management interface.

When based on the system framework shown in Figure 3, the resource allocation method provided by the embodiment of the present invention can be referred to as shown in Figure 4, including the following steps:

401: Receive a flow table establishment request message sent by the server, the flow table establishment request message includes a resource application identifier and a flow table entry identifier allocated for the flow table entry to be established, and the resource application identifier is used to indicate the The controller needs to allocate resources, and the flow table entry identifier is the identifier of the flow table entry that needs to be established.

In the embodiment of the present invention, the flow table establishment request message is used to instruct the forwarding device to establish the flow table entry, and before the forwarding device establishes the flow table entry, the Controller needs to allocate resource information for the establishment of the flow table entry.

Wherein, the resource application identifier is used to indicate the resource to be allocated by the Controller. In some examples, the resource application identifier may include an IP address, and in other examples, the resource application identifier may include an IP address and a port.

The flow table entry identifier is the identifier of the flow table entry that needs to be established, which may be the operation sequence number in the message format shown in Table 1. The user attribute information is included in the entry content of the flow table establishment request message, and represents the resource information allocated by the APP of the transition technology. In some examples, the user attribute information may include an intranet source IP address and an intranet source port.

Please refer to Table 1 to Table 3 for the specific format of the flow table establishment request message and the specific format of the table item content included therein, which will not be listed in the embodiment of the present invention.

402: Allocate resource information according to the resource application identifier, where the resource information includes an IP address, or the resource information includes an IP address and a port.

In the embodiment of the present invention, the Controller 312 receives the flow table establishment request message sent by the server through the address pool management interface, and further obtains resource information from the address pool through the address pool management interface.

403: Add the resource information to the flow table establishment request message corresponding to the flow table entry identifier, and forward the flow table establishment request message with the resource information added to the forwarding device, so that The forwarding device establishes the flow table entry according to the flow table establishment request message added with the resource information.

Controller 312 sends the flow table creation request message with added resource information to forwarding device 313 through the address pool management interface, and forwarding device 313 starts the flow table entry creation operation according to the flow table creation request message with added resource information, and starts the flow table Table entry creation.

Referring to FIG. 5 , an example diagram of a resource allocation method provided by an embodiment of the present invention, wherein the Controller receives a flow table establishment request message sent by a server, the server runs NAT44APP, and the flow table establishment request message includes user attribute information, and the user The attribute information includes the internal network source IP address 192.168.1.1 and the internal network source port 2500, and the flow table establishment request message also includes the resource application identifier—the external network source IP address to be allocated and the external network source port to be allocated. After receiving the flow table creation request message, the Controller allocates resource information corresponding to the resource application identifier, and the resource information includes the external network source IP address 202.1.1.1 and the external network source port 5000. The Controller adds the allocated resource information to the flow table establishment request message, and sends the flow table establishment request message added with the resource information to the forwarding device, and the forwarding device establishes a flow table forwarding entry according to the flow table establishment request message , the flow table forwarding entry includes the user attribute information and the resource information.

Referring to FIG. 6, FIG. 6 is a schematic diagram of an implementation of the system shown in FIG. 3, which includes: a server 621, a controller Controller 622, and a forwarding device 623, wherein,

The server 621 is configured to generate and send a flow table establishment message to the forwarding device, the flow table establishment message is used to indicate establishment of a flow table entry, the flow table establishment message includes user attribute information, and the user attribute information includes User's intranet source IP address and intranet source port information.

The forwarding device 623 is configured to receive the flow table establishment message sent by the server 621, generate the flow table establishment request message according to the flow table establishment message, and send the flow table establishment request message to the Controller;

The Controller 622 is configured to receive the flow table establishment request message sent by the forwarding device 623, allocate resource information according to the resource application identifier in the flow table establishment request message, and send the allocated resource information to the forwarding device 623, and the forwarding device 623 according to the resource information to create flow table entries.

In the system framework shown in FIG. 6, the Controller 622 may include an address pool management interface and store an address pool, where the address pool integrates resources used by various transition technologies, and the Controller 622 may connect to the forwarding device 623 through the address pool management interface, and The resources in the address pool are further invoked through the address pool management interface.

When based on the system shown in FIG. 6, the resource allocation method provided by the embodiment of the present invention can be referred to as shown in FIG. 7, and may include the following steps:

701: Receive a flow table establishment request message sent by the forwarding device.

The flow table establishment request message may be generated by the forwarding device according to the flow table establishment message received from the server. The flow table establishment message is used to indicate establishment of a flow table entry, and the flow table establishment message includes user attribute information, and the user attribute information includes the user's intranet source IP address and intranet source port information. The format of the flow table establishment message may refer to Table 1 to Table 3. After obtaining the flow table establishment message, the forwarding device removes other information except the resource application identifier, generates a flow table establishment request message, and sends the flow table establishment request message to the Controller.

The resource application identifier in the flow table establishment request message received by the Controller is used to indicate resource information allocated by the Controller.

702: Allocate resource information according to the resource application identifier.

703: Send the resource information and the identifier of the flow table entry to the forwarding device, and the forwarding device creates a flow table entry according to the resource information.

In this example, the Controller receives the flow table creation request message sent by the forwarding device through the address pool management interface, and further obtains the resource information corresponding to the resource application identifier in the address pool from the address pool through the address pool management interface, and then the resource information It is sent to the forwarding device, and the forwarding device jointly builds the flow table entry according to the resource information and the user attribute information obtained from the flow table establishment message.

Based on the system framework shown in Figure 6, an example of applying the resource allocation method provided in Figure 7 can be referred to in Figure 8, which shows how to use the NAT44 transition technology APP when the Controller is bypassed on the forwarding device The process of assigning resource information. The bypass refers to the connection mode that the Controller connects to the forwarding device through the address pool management interface.

In the embodiments provided above, the flow table establishment request message is a form-filling flow table establishment request message, and the form-filling flow table establishment request message is specifically: the resource information reserved in advance in the flow table establishment request message Storage space, the Controller fills in the allocated resource information into the storage space of the corresponding resource information. As shown in Table 2, in Table 2, the source IP address of the external network and the source port of the external network are the resource information that needs to be allocated, and the corresponding space in the message is the flow table establishment request message reserved in advance to store these two Information storage space.

In the embodiment of the present invention, the way that the Controller can fill in the allocated resource information into the storage space of the corresponding resource information can be called a form-filling way of requesting resource allocation. In this way, after the Controller allocates resources, the The resource information is added to the entry content of the flow table entry, so that when the forwarding device establishes the flow table entry, it can directly extract the user attribute information and resource information from the flow table creation request message to obtain a flow table entry. In this way, the process of establishing flow table entries is simplified and efficiency is improved.

In other examples provided by the embodiments of the present invention, the Controller may further monitor the flow table entries obtained by the forwarding device during the process of allocating resources. As shown in Figures 9 and 10, Figure 9 shows the process of the Controller performing resource allocation, flow table deletion, and recycling in the system framework shown in Figure 3, and Figure 10 shows the Controller's process based on the framework shown in Figure 6 Processes for resource allocation, flow table deletion, and recycling.

Correspondingly, on the basis of Figure 1, the resource allocation method provided by the embodiment of the present invention may further include step 104:

When the controller detects that the survival time of the flow table entry exceeds the preset time threshold, it reclaims the allocated resource information and sends a flow table deletion message to the forwarding device, so that the forwarding device deletes the flow table entry, as shown in Figure 11.

The setting of the preset time threshold may be different according to different application scenarios, which is not limited in this embodiment of the present invention. By applying the resource allocation method provided by the present invention, the controller can reclaim unused resource information within the preset time threshold by monitoring the flow table entries, avoid resource waste caused by long-term unused resource information, and further improve the rationality of resources. use.

Referring to FIG. 12, the embodiment of the present invention also provides a Controller 1200, which is suitable for a control-forwarding separation network. The Controller 1200 can be used to execute the method in the foregoing method embodiment. The Controller 1200 can include:

A receiving unit 1211 , an allocating unit 1212 and a sending unit 1213 . in,

The receiving unit 1211 is configured to receive a flow table establishment request message, the flow table establishment request message includes a resource application identifier and a flow table entry identifier allocated for the flow table entry to be established, and the resource application identifier is used to indicate the The resource that needs to be allocated by the Controller 1200, the flow table entry identifier is the identifier of the flow table entry that needs to be established;

An allocating unit 1212, configured to allocate resource information according to the resource application identifier, where the resource information includes an Internet Protocol IP address, or the resource information includes an IP address and a port;

The sending unit 1213 is configured to send the allocated resource information to the forwarding device, so that the forwarding device creates the flow table entry according to the allocated resource information.

Optionally, the receiving unit 1211 receiving the flow table establishment request message specifically includes:

The flow table establishment request message sent by the server is received, and the flow table establishment request message further includes user attribute information, and the user attribute information includes the user's intranet source IP address and intranet source port information. Wherein, the flow table entry identifier is an identifier of the flow table entry that needs to be established, and the resource application identifier is used to indicate the resource that the Controller 1200 needs to allocate.

The sending unit 1213 sends the allocated resource information to the forwarding device, specifically including:

Adding the resource information to the flow table establishment request message corresponding to the flow table entry identifier, and forwarding the flow table establishment request message added with the resource information to the forwarding device.

In the resource allocation method provided by the embodiment of the present invention, the Controller 1200 can receive the flow table establishment request message, and allocate resource information according to the resource application identifier in the flow table establishment request message, so as to realize the unification of the resources used by the various transition technologies by the Controller 1200 Allocation, so that each transition technology can share one address pool to realize centralized management of resources, and then can obtain resources from the shared address pool for allocation during resource allocation, avoiding resource waste caused by each transition technology using an independent address pool . Moreover, the Controller1200 manages the resources used by each transition technology in a unified manner, so that each APP can no longer integrate the resource allocation function, reducing the difficulty of writing each APP.

Optionally, the receiving unit 1211 receiving the flow table establishment request message specifically includes:

receiving the flow table establishment request message sent by the forwarding device;

The sending unit 1213 sends the allocated resource information to the forwarding device, specifically including:

Sending the resource information and the flow table entry identifier to the forwarding device, and the forwarding device creates the flow table entry according to the resource information.

Optionally, the flow table establishment request message is a form-filling flow table establishment request message, and the form-filling flow table establishment request message specifically includes: pre-reserving in the flow table establishment request message for storing The resource information storage space, after the Controller 1200 allocates the resource information, fills the resource information into the corresponding resource information storage space.

Optionally, the Controller1200 also includes:

a detection unit, configured to detect the survival time of the flow table entry;

A reclaiming unit, configured to reclaim the allocated resource information when the detecting unit detects that the survival time of the flow table entry exceeds a preset time threshold;

The sending unit 1213 is further configured to send a flow table deletion message to the forwarding device when the detection unit detects that the survival time of the flow table entry exceeds the preset time threshold, so that the forwarding device Delete the flow table entry. The setting of the preset time threshold may be different according to different application scenarios, which is not limited in this embodiment of the present invention. The controller can recycle unused resource information within the preset time threshold by monitoring the flow table entries, avoiding resource waste caused by long-term unused resource information, and further improving the rational utilization of resources.

Referring to Fig. 13, the embodiment of the present invention also provides a Controller 1300, which is suitable for a control-forwarding separation network. The Controller 1300 includes: a memory 1301, a receiver 1302, and a transmitter 1303, and a A connected processor 1304, the memory 1301 is used to store a set of program instructions, and the processor 1304 is used to call the program instructions stored in the memory 1301 to perform the following operations:

The trigger receiver 1302 receives a flow table establishment request message, the flow table establishment request message includes a resource application identifier and a flow table entry identifier allocated for the flow table entry to be established, and the resource application identifier is used to indicate that the Controller 1300 resources that need to be allocated, and the flow table entry identifier is the identifier of the flow table entry that needs to be established;

Allocating resource information according to the resource application identifier, where the resource information includes an Internet Protocol IP address, or, the resource information includes an IP address and a port;

The sender 1303 is triggered to send the allocated resource information to the forwarding device, so that the forwarding device creates the flow table entry according to the allocated resource information.

Optionally, receiving the flow table establishment request message by the receiver 1302 includes:

The flow table establishment request message sent by the server is received, and the flow table establishment request message further includes user attribute information, and the user attribute information includes the user's intranet source IP address and intranet source port information.

Optionally, the sender 1303 sends the allocated resource information to the forwarding device, including:

Adding the resource information to the flow table establishment request message corresponding to the flow table entry identifier, and forwarding the flow table establishment request message added with the resource information to the forwarding device.

Optionally, receiving the flow table establishment request message by the receiver 1302 includes:

receiving the flow table establishment request message sent by the forwarding device;

The sending the allocated resource information to the forwarding device includes:

Sending the resource information and the flow table entry identifier to the forwarding device, and the forwarding device creates the flow table entry according to the resource information.

Optionally, the processor 1304 may be a central processing unit (Central Processing Unit, CPU), the memory 1301 may be an internal memory of a random access memory (Random Access Memory, RAM) type, and the receiver 1302 and The transmitter 1303 may include a common physical interface, and the physical interface may be an Ethernet (Ethernet) interface or an Asynchronous Transfer Mode (Asynchronous Transfer Mode, ATM) interface. The processor 1304, the receiver 1302, the transmitter 1303 and the memory 1301 may be integrated into one or more independent circuits or hardware, such as application specific integrated circuits (Application Specific Integrated Circuit, ASIC).

It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. For the same and similar parts in each embodiment, refer to each other, that is, Can. As for the device-type embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and for related parts, please refer to part of the description of the method embodiments.

Those of ordinary skill in the art can understand that all or part of the steps to realize the above method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the execution includes: The steps of the above-mentioned method embodiment; and the aforementioned storage medium can be at least one of the following media: read-only memory (Read-Only Memory, referred to as ROM), RAM, magnetic disk or optical disk, etc. can store program codes medium.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention and the beneficial effects brought by the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art Those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the present invention Scope of Claims.

Claims (15)

1. A resource allocation method, adapted to be used in a control forwarding separation network, the method comprising:

a Controller receives a flow table establishment request message, wherein the flow table establishment request message comprises a resource application identifier and a flow table entry identifier which are allocated for a flow table entry needing to be established, the resource application identifier is used for indicating a resource needing to be allocated by the Controller, and the flow table entry identifier is an identifier of the flow table entry needing to be established;

according to the resource application identification, resource information matched with the resource application identification is distributed from the same address pool corresponding to each transition technology, wherein the resource information comprises an Internet Protocol (IP) address, or the resource information comprises an IP address and a port;

and sending the allocated resource information to forwarding equipment so that the forwarding equipment establishes the flow table entry according to the allocated resource information.

2. The method of claim 1, wherein the receiving the flow table setup request message comprises:

and receiving the flow table establishing request message sent by the server, wherein the flow table establishing request message also comprises user attribute information, and the user attribute information comprises an intranet source IP address and intranet source port information of a user.

3. The method of claim 1, wherein the sending the allocated resource information to a forwarding device comprises:

and adding the resource information into the flow table establishment request message corresponding to the flow table entry identifier, and forwarding the flow table establishment request message added with the resource information to a forwarding device.

4. The method of claim 1, wherein the receiving the flow table setup request message comprises:

receiving the flow table establishment request message sent by the forwarding device;

the sending the allocated resource information to a forwarding device includes:

and sending the resource information and the flow table entry identifier to the forwarding device, and establishing the flow table entry by the forwarding device according to the resource information.

5. The method according to any one of claims 1 to4, wherein the flow table establishment request message is a table-filling flow table establishment request message, and the table-filling flow table establishment request message is specifically: reserving a storage space for storing the resource information in the flow table establishing request message, and filling the resource information into the storage space corresponding to the resource information after the Controller allocates the resource information.

6. The method according to any one of claims 1 to4, further comprising:

when detecting that the survival time of the flow table entry exceeds a preset time threshold, recovering the allocated resource information, and sending a flow table deletion message to the forwarding device, so that the forwarding device deletes the flow table entry.

7. A Controller, wherein the Controller is adapted to control a forwarding splitting network, comprising:

a receiving unit, configured to receive a flow table establishment request message, where the flow table establishment request message includes a resource application identifier and a flow table entry identifier allocated for a flow table entry to be established, the resource application identifier is used to indicate a resource that needs to be allocated by the Controller, and the flow table entry identifier is an identifier of the flow table entry to be established;

the allocation unit is used for allocating resource information matched with the resource application identifier from the same address pool corresponding to each transition technology according to the resource application identifier, wherein the resource information comprises an Internet Protocol (IP) address, or the resource information comprises an IP address and a port;

a sending unit, configured to send the allocated resource information to a forwarding device, so that the forwarding device establishes the flow table entry according to the allocated resource information.

8. The Controller according to claim 7, wherein the receiving, by the receiving unit, the flow table establishment request message specifically includes:

and receiving the flow table establishing request message sent by the server, wherein the flow table establishing request message also comprises user attribute information, and the user attribute information comprises an intranet source IP address and intranet source port information of a user.

9. The Controller according to claim 7, wherein the sending unit sends the allocated resource information to a forwarding device, specifically comprising:

and adding the resource information into the flow table establishment request message corresponding to the flow table entry identifier, and forwarding the flow table establishment request message added with the resource information to a forwarding device.

10. The Controller according to claim 7, wherein the receiving, by the receiving unit, the flow table establishment request message specifically includes:

receiving the flow table establishment request message sent by the forwarding device;

the sending unit sends the allocated resource information to a forwarding device, and specifically includes:

and sending the resource information and the flow table entry identifier to the forwarding device, and establishing the flow table entry by the forwarding device according to the resource information.

11. The Controller according to any one of claims 7 to 10, wherein the flow table establishment request message is a table-filling flow table establishment request message, and the table-filling flow table establishment request message is specifically: and reserving a storage space for storing the resource information in the flow table establishing request message in advance, and filling the resource information into the corresponding storage space of the resource information after the Controller allocates the resource information.

12. The Controller according to any one of claims 7 to 10, wherein the Controller further comprises:

a detecting unit, configured to detect a survival time of an entry of the flow table;

a recovery unit, configured to recover the allocated resource information when the detection unit detects that the survival time of the table entry in the flow table exceeds a preset time threshold;

the sending unit is further configured to send a flow table deletion message to the forwarding device when the detecting unit detects that the survival time of the flow table entry exceeds the preset time threshold, so that the forwarding device deletes the flow table entry.

13. A resource allocation system, characterized in that the system comprises a Controller and a forwarding device, wherein,

the Controller is configured to receive a flow table establishment request message, where the flow table establishment request message includes a resource application identifier and a flow table entry identifier allocated to a flow table entry to be established, the resource application identifier is used to indicate a resource that the Controller needs to allocate, and the flow table entry identifier is an identifier of the flow table entry to be established; according to the resource application identification, resource information matched with the resource application identification is distributed from the same address pool corresponding to each transition technology, wherein the resource information comprises an Internet Protocol (IP) address, or the resource information comprises an IP address and a port; sending the allocated resource information to a forwarding device, so that the forwarding device establishes the flow table entry according to the allocated resource information;

and the forwarding device is configured to receive the resource information sent by the Controller, and establish the flow table entry according to the resource information.

14. The system of claim 13, further comprising: a server that, among other things,

the server is used for generating and sending the flow table establishing request message;

the Controller is specifically configured to receive a flow table establishment request message sent by the server, allocate resource information according to the resource application identifier, add the resource information to the flow table establishment request message corresponding to the flow table entry identifier, and forward the flow table establishment request message to which the resource information is added to the forwarding device, where the flow table establishment request message further includes user attribute information, and the user attribute information includes an intranet source IP address and intranet source port information of a user;

the forwarding device is specifically configured to receive the flow table establishment request message added with the resource information and sent by the Controller, and establish the flow table entry according to the flow table establishment request message added with the resource information.

15. The system of claim 13, further comprising a server, wherein,

the server is configured to generate and send a flow table establishment message to the forwarding device, where the flow table establishment message is used to indicate establishment of a flow table entry, the flow table establishment message includes user attribute information, and the user attribute information includes an intranet source IP address and intranet source port information of the user;

the forwarding device is further configured to receive the flow table establishment message sent by the server, generate the flow table establishment request message according to the flow table establishment message, and send the flow table establishment request message to the Controller;

the Controller is specifically configured to receive the flow table establishment request message sent by the forwarding device, allocate resource information according to the resource application identifier, and send the resource information and the flow table entry identifier to the forwarding device;

the forwarding device is specifically configured to receive the resource information sent by the Controller, and establish the flow table entry according to the resource information.