CN105515850A - Method for controlling and managing ForCES forwarding part through OpenFlow controller and configuration point - Google Patents
Method for controlling and managing ForCES forwarding part through OpenFlow controller and configuration point Download PDFInfo
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Abstract
The invention discloses a method for controlling and managing a ForCES forwarding part through an OpenFlow controller and a configuration point. The method disclosed by the invention is used for converting the OpenFlow controller and the configuration point that do not support to control the ForCES forwarding part through a protocol conversion module, so as to control and manage the ForCES forwarding part through the OpenFlow controller and the configuration point. Therefore, the method disclosed by the invention is used for effectively solving the compatibility problem of OpenFlow control equipment and ForCES forwarding equipment and providing a feasible technical solution for the extensibility of ForCES equipment.
Description
Technical field
Example of the present invention relates to network communication technology field, particularly relates to a kind of control and management method utilizing OpenFlow controller and collocation point to realize ForCES forwarding element.
Background technology
SDN(SoftwareDefinedNetwork, software defined network) be a kind of new network innovation framework, be a kind of implementation of network virtualization, be separated by control plane and datum plane the flexible control achieved network traffics.Current SDN technology has been the state that a hundred flowers blossom, and OpenFlow technology, ForCES technology, OpenDaylight technology, network Reconfiguration Technologies etc. all belong to SDN technical field.
At present, OpenFlow controller can only control OpenFlow switch, and the forwarding element of ForCES also can only be controlled by the control piece of ForCES.The core of OpenFlow switch is exactly the process of convection current, by network equipment maintenance stream table, and only forwards according to stream table.The processing procedure that ForCES agreement has oneself special and tupe, ForCES agreement needs edit field in the process of process, action is determined, such as in route processing process, two layers of head can be replaced, subtract TTL(TimeToLive, life span), also DSCP(DifferentiatedServicesCodePoint may be revised, differentiated services code points), but can not go to change IP address, changing IP address is NAT(NetworkAddressTranslation, network address translation) behavior, instead of common route behavior.And OpenFlow requires with ForCES different, stream table is the most elementary cell of OpenFlow switch processes packet, the flow process of OpenFlow process message all with protocol-independent.If running into upper strata is OpenFlow controller, when lower floor is the situation of ForCES forwarding element, controller and forwarding element just cannot proper communications, also just cannot manage network traffics.As can be seen from above-mentioned situation, the compatibility of OpenFlow agreement and ForCES agreement is very poor, and the extensibility of OpenFlow equipment and ForCES equipment is also very poor.
Summary of the invention
The invention provides a kind of control and management method utilizing OpenFlow controller and collocation point to realize ForCES forwarding element, the method can improve the compatibility of OpenFlow agreement and ForCES agreement, can also strengthen the extensibility of OpenFlow equipment and ForCES equipment.
The object of the invention is to be achieved through the following technical solutions: a kind of control and management method utilizing OpenFlow controller and collocation point to realize ForCES forwarding element, comprises the steps:
Step 1.OpenFlow controller issues OpenFlow flow table message or OpenFlow collocation point sends OF-CONFIG protocol configuration message to protocol conversion module;
Described protocol conversion module comprises: type of message analyzes submodule, matching domain is analyzed submodule, Counter analysis submodule, instruction analysis submodule and configuration messages and analyzed submodule;
Described type of message analysis module refers to and is used for the module that the type of message sent OpenFlow controller or OpenFlow collocation point judges judging that type of message is OpenFlow flow table message, or OF-CONFIG protocol configuration message;
Described matching domain is analyzed submodule and is referred to the module analyzed the matching domain in OpenFlow flow table message;
Described Counter analysis submodule refers to the module analyzed the counter in OpenFlow flow table message;
Described instruction analysis submodule refers to the module analyzed the instruction in OpenFlow flow table message;
Described configuration messages is analyzed submodule and is referred to the module analyzed OF-CONFIG protocol configuration message;
The message that type of message analysis submodule reception OpenFlow controller in step 2. protocol conversion module or OpenFlow collocation point send, judges the type of message received; If the type of message received is OpenFlow flow table message, then continue to perform step 3; If the type of message received is OF-CONFIG protocol configuration type of message, then continue to perform step 9;
Step 3. instruction analysis submodule analyzes the instruction in OpenFlow flow table message, extracts the action message in stream list item, then determines to flow the logic function block type mapped needed for list item according to this action message;
The matching domain that step 4. matching domain is analyzed in submodule convection current table is analyzed, according to analysis result, the source IP address in stream list item, object IP address, source port number, destination slogan are mapped as respectively the source IP address in logic function block's attribute, object IP address, source port number, destination slogan; Ethernet type, IP protocol type in stream list item is mapped as the type of data packet in logic function block's attribute; Metadata in stream list item is mapped as the metadata in logic function block's attribute; Inbound port in stream list item is mapped as the input port in logic function block's attribute; If the action in instruction is forwarding behavior, be then output port in logic function block's attribute by the forwarding port mapping in stream list item;
Counter in step 5. Counter analysis submodule analysis stream list item, extract the information of counter, the data packet count field of this counter and byte count field are mapped as respectively the data packet count device attribute in logic function block's attribute and byte counter attribute;
Step 6. finds the logic function block corresponding with flowing list item according to the analysis result of step 3 from logic function block storehouse, and configures the attribute of this logic function block according to the analysis result of step 4 and step 5;
Step 7. rolls back to step 3, needs to be mapped as logic function block until do not flow list item;
The type of each logic function block that step 8. maps out according to every bar stream list item, connects each logic function block successively to reach the requirement of handle packet, thus determines the logic function block topology that wall scroll stream list item is corresponding; According to the precedence relationship of each bar stream list item in stream table, logic function block topology corresponding for each bar stream list item is connected successively, thus determines the logic function block topology that stream table is corresponding; Convert the logic function block topology information corresponding to stream table to ForCES message again;
Step 9. configuration messages is analyzed submodule and is analyzed OF-CONFIG protocol configuration message, extracts the information in configuration messages, is the ForCES message configured ForCES forwarding element by OF-CONFIG agreement to the message maps of OpenFlow switch configuration;
ForCES message is sent to ForCES forwarding element by step 10. protocol conversion module.
Further, step 9 specifically comprises following sub-step:
Step a. finds out the logic function block that can configure ForCES forwarding element attribute according to OF-CONFIG protocol configuration message from logic function block storehouse;
Step b. takes out attribute and the property value of configuration OpenFlow switch from OF-CONFIG protocol configuration message;
Step c according in step b to the attribute of OpenFlow switch configuration and property value, the attribute of the required configuration of the logic function block that determining step a finds out and property value; Convert the information that logic function block is configured to ForCES message.
As seen from the above technical solution provided by the invention, the present invention will not support that the OpenFlow controller of control ForCES forwarding element and collocation point achieve OpenFlow controller and collocation point to the control and management of ForCES forwarding element by protocol conversion module.Therefore, present invention efficiently solves the compatibility issue between OpenFlow control appliance and ForCES forwarding unit, the autgmentability for ForCES equipment provides a kind of feasible technical scheme.
Accompanying drawing explanation
Fig. 1 is protocol conversion module internal structure schematic diagram;
Fig. 2 is OpenFlow controller and collocation point control and management ForCES forwarding element structural representation;
Fig. 3 is the flow chart of OpenFlow controller and collocation point control and management ForCES forwarding element.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
A kind of control and management method utilizing OpenFlow controller and collocation point to realize ForCES forwarding element provided by the invention, step is as follows:
Step 1.OpenFlow controller issues OpenFlow flow table message according to specific demand or OpenFlow collocation point sends OF-CONFIG protocol configuration message to protocol conversion module;
Described protocol conversion module comprises: type of message analyzes submodule, matching domain is analyzed submodule, Counter analysis submodule, instruction analysis submodule and configuration messages and analyzed submodule;
Described type of message analysis module refers to and is used for the module that the type of message sent OpenFlow controller judges judging that type of message is OpenFlow flow table message, or OF-CONFIG protocol configuration message;
Described matching domain is analyzed submodule and is referred to the module analyzed the matching domain in OpenFlow flow table message;
Described Counter analysis submodule refers to the module analyzed the counter in OpenFlow flow table message;
Described instruction analysis submodule refers to the module analyzed the instruction in OpenFlow flow table message;
Described configuration messages is analyzed submodule and is referred to the module analyzed OF-CONFIG protocol configuration message;
The message that type of message analysis submodule reception OpenFlow controller in step 2. protocol conversion module or OpenFlow collocation point send, judges the type of message received; If the type of message received is OpenFlow flow table message, then continue to perform step 3; If the type of message received is OF-CONFIG protocol configuration type of message, then continue to perform step 9;
Step 3. instruction analysis submodule analyzes the instruction in OpenFlow flow table message, extracts the action message in stream list item, then determines to flow the logic function block type mapped needed for list item according to this action message;
The matching domain that step 4. matching domain is analyzed in submodule convection current table is analyzed, according to analysis result, the source IP address in stream list item, object IP address, source port number, destination slogan are mapped as respectively the source IP address in logic function block's attribute, object IP address, source port number, destination slogan; Ethernet type, IP protocol type in stream list item is mapped as the type of data packet in logic function block's attribute; Metadata in stream list item is mapped as the metadata in logic function block's attribute; Inbound port in stream list item is mapped as the input port in logic function block's attribute; If the action of stream list item is forwarding behavior, be then output port in logic function block's attribute by the forwarding port mapping in stream list item;
Counter in step 5. Counter analysis submodule analysis stream list item, extract the information of counter, the data packet count field of this counter and byte count field are mapped as respectively the data packet count device attribute in logic function block's attribute and byte counter attribute;
Step 6. finds the logic function block corresponding with flowing list item according to the analysis result of step 3 from logic function block storehouse, and configures the attribute of this logic function block according to the analysis result of step 4 and step 5;
Step 7. rolls back to step 3, needs to be mapped as logic function block until do not flow list item;
Message conversion according to the action of stream list item and the topological relation flowing table number determination logic function block, and is become ForCES message by step 8.;
Step 9. configuration messages is analyzed submodule and is analyzed OF-CONFIG protocol configuration message, extracts the information in configuration messages, is the ForCES message configured ForCES forwarding element by OF-CONFIG agreement to the message maps of OpenFlow switch configuration;
ForCES message is sent to ForCES forwarding element by step 10. protocol conversion module.
Further, step 9 specifically comprises following sub-step:
Step a. finds out the logic function block that can configure ForCES forwarding element attribute according to OF-CONFIG protocol configuration message from logic function block storehouse;
Step b. takes out attribute and the property value of configuration OpenFlow switch from OF-CONFIG protocol configuration message;
Step c according in step b to the attribute of OpenFlow switch configuration and property value, the attribute of the required configuration of the logic function block that determining step a finds out and property value; Convert the information that logic function block is configured to ForCES message.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and a little clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment in the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to scope.
Fig. 1 illustrates the structure of protocol conversion module inside.Fig. 2 is OpenFlow controller and collocation point control and management ForCES forwarding element structural representation, the message of OpenFlow controller or collocation point issues protocol conversion module, and the message conversion received is send to ForCES forwarding element after ForCES message by protocol conversion module.Fig. 3 is the flow chart of OpenFlow controller and collocation point control and management ForCES forwarding element.The present invention is described in detail below by for two specific examples.
(1) OpenFlow controller issues stream table message to protocol conversion module, IPv4 address, source in matching domain in stream list item is 192.168.1.2/16, object IPv4 address is 192.168.1.10/16, action in instruction is Output, port numbers is 100, and in stream list item, other are all default value.After this stream table message sends to protocol conversion module, type of message is analyzed submodule and is judged that this message is OpenFlow flow table message, then this message is sent to matching domain to analyze submodule, Counter analysis submodule and instruction analysis submodule respectively.Can determine that this action is the behavior of a forwarding data bag after type of action " Output " in instruction analysis submodule acquisition instruction and port numbers " 100 ", then can find out the logic function block " EtherMACOut " with forwarding behavior relevant to the behavior from logic function block storehouse.Matching domain is analyzed after submodule gets IPv4 address, source in matching domain and object IPv4 address, can determine that this forwarding behavior is relevant to IPv4 packet, therefore these field informations can be mapped as the logic function block " IPv4NextHop " that the logic function block " IPv4Validator " of IPv4 packet authentication, the logic function block " IPv4UcastLPM " of IPv4 packet prefix matching and IPv4 packet forward.Counter analysis submodule finds out corresponding logic function block " Counter " after obtaining the default information of counter field from logic function block storehouse.The association attributes of each logic function block can be determined according to the structure obtained after three sub-module analysis above, then determine the topological relation between logic function block.The topological relation of logic function block is { IPv4Validator->IPv4UcastLPM-GreatT.GreaT.G TIPv4NextHop-> (EtherMACOut, Counter) }.If there are many stream list items in stream table, then can map out corresponding logic function block successively and building topology relation according to above-mentioned method.If OpenFlow controller has issued multiple stream tables, then the topological relation can determining between logic function block according to stream table number.Stream table number sorts successively from small to large, and the topology mapping logic function block out is also connected by before and after order from small to large.ForCES forwarding element is sent to after finally converting the topology information of logic function block to ForCES message.
(2) OpenFlow collocation point sends OF-CONFIG protocol configuration message to protocol conversion module, and this configuration messages is port numbers: 200, maximum rate: 1000, state: open.Type of message is analyzed after submodule receives this message and is judged that this message is OF-CONFIG protocol configuration message, then this message sent to configuration messages to analyze submodule, thus configuration messages analysis submodule can find out corresponding logic function block " EhterPHYCop " from logic function block storehouse.Configuration messages determines the correlation attribute value of logic function block " EhterPHYCop " after analyzing the attribute configuration information that submodule obtains in message, wherein the value of attribute PHYPortID is 200, the value of attribute SupportedLinkSpeed is 1000, the value of attribute Status is Up.ForCES forwarding element is sent to after finally converting the configuration information of this logic function block to ForCES message.
Claims (2)
1. utilize OpenFlow controller and the control and management method of collocation point realization to ForCES forwarding element, it is characterized in that, the method comprises the steps:
Step 1.OpenFlow controller issues OpenFlow flow table message or OpenFlow collocation point sends OF-CONFIG protocol configuration message to protocol conversion module;
Described protocol conversion module comprises: type of message analyzes submodule, matching domain is analyzed submodule, Counter analysis submodule, instruction analysis submodule and configuration messages and analyzed submodule;
Described type of message analysis module refers to and is used for the module that the type of message sent OpenFlow controller or OpenFlow collocation point judges judging that type of message is OpenFlow flow table message, or OF-CONFIG protocol configuration message;
Described matching domain is analyzed submodule and is referred to the module analyzed the matching domain in OpenFlow flow table message;
Described Counter analysis submodule refers to the module analyzed the counter in OpenFlow flow table message;
Described instruction analysis submodule refers to the module analyzed the instruction in OpenFlow flow table message;
Described configuration messages is analyzed submodule and is referred to the module analyzed OF-CONFIG protocol configuration message;
The message that type of message analysis submodule reception OpenFlow controller in step 2. protocol conversion module or OpenFlow collocation point send, judges the type of message received; If the type of message received is OpenFlow flow table message, then continue to perform step 3; If the type of message received is OF-CONFIG protocol configuration type of message, then continue to perform step 9;
Step 3. instruction analysis submodule analyzes the instruction in OpenFlow flow table message, extracts the action message in stream list item, then determines to flow the logic function block type mapped needed for list item according to this action message;
The matching domain that step 4. matching domain is analyzed in submodule convection current table is analyzed, according to analysis result, the source IP address in stream list item, object IP address, source port number, destination slogan are mapped as respectively the source IP address in logic function block's attribute, object IP address, source port number, destination slogan; Ethernet type, IP protocol type in stream list item is mapped as the type of data packet in logic function block's attribute; Metadata in stream list item is mapped as the metadata in logic function block's attribute; Inbound port in stream list item is mapped as the input port in logic function block's attribute; If the action in instruction is forwarding behavior, be then output port in logic function block's attribute by the forwarding port mapping in stream list item;
Counter in step 5. Counter analysis submodule analysis stream list item, extract the information of counter, the data packet count field of this counter and byte count field are mapped as respectively the data packet count device attribute in logic function block's attribute and byte counter attribute;
Step 6. finds the logic function block corresponding with flowing list item according to the analysis result of step 3 from logic function block storehouse, and configures the attribute of this logic function block according to the analysis result of step 4 and step 5;
Step 7. rolls back to step 3, needs to be mapped as logic function block until do not flow list item;
The type of each logic function block that step 8. maps out according to every bar stream list item, connects each logic function block successively to reach the requirement of handle packet, thus determines the logic function block topology that wall scroll stream list item is corresponding; According to the precedence relationship of each bar stream list item in stream table, logic function block topology corresponding for each bar stream list item is connected successively, thus determines the logic function block topology that stream table is corresponding; Convert the logic function block topology information corresponding to stream table to ForCES message again;
Step 9. configuration messages is analyzed submodule and is analyzed OF-CONFIG protocol configuration message, extracts the information in configuration messages, is the ForCES message configured ForCES forwarding element by OF-CONFIG agreement to the message maps of OpenFlow switch configuration;
ForCES message is sent to ForCES forwarding element by step 10. protocol conversion module.
2. a kind of control and management method utilizing OpenFlow controller and collocation point to realize ForCES forwarding element according to claim 1, it is characterized in that, step 9 specifically comprises following sub-step:
Step a. finds out the logic function block that can configure ForCES forwarding element attribute according to OF-CONFIG protocol configuration message from logic function block storehouse;
Step b. takes out attribute and the property value of configuration OpenFlow switch from OF-CONFIG protocol configuration message;
Step c according in step b to the attribute of OpenFlow switch configuration and property value, the attribute of the required configuration of the logic function block that determining step a finds out and property value; Convert the information that logic function block is configured to ForCES message.
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