CN105791237A - Protocol conversion method and device - Google Patents
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- CN105791237A CN105791237A CN201410816884.8A CN201410816884A CN105791237A CN 105791237 A CN105791237 A CN 105791237A CN 201410816884 A CN201410816884 A CN 201410816884A CN 105791237 A CN105791237 A CN 105791237A
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Abstract
The invention provides a protocol conversion method and a protocol conversion device, relates to the field of communication and solves the problem that the existing switching device cannot meet the compatibility requirement for an SDN (Software Defined Network) and a traditional network. The method comprises the following steps: judging a working mode, wherein the working mode is an SDN mode or a traditional network mode; and according to the judged working mode, carrying out protocol conversion on a received flowtable. The technical scheme provided by the invention is applied to the SDN and realizes the compatibility for the SDN and the traditional network.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of protocol translation method and apparatus.
Background technology
Software defined network (SDN, SoftwareDefinedNetwork) is a kind of novel network architecture, and its design concept is network-based control plane and data Forwarding plane to be easily separated, and realizes programmable control.In SDN, SDN switch is only responsible for simple data and is forwarded, and its hardware structure would tend to unitize, and its all parts trends towards generalization between each producer.And the control plane being originally responsible for route, safety, strategy, QoS, traffic engineering etc. will be realized by special SDN controller.Between SDN switch and SDN controller, the agreement of communication is usually OpenFlow agreement.
OpenFlow agreement is to control and forward to separate, one FlowTable of network equipment maintenance and forwarding only according to FlowTable, the generation of Flowtable itself, safeguards, issues and realized by external Controller completely.Flowtable is divided into MatchFields, enumerator and three parts of instruction set, MatchFields is the input keyword of message coupling, enumerator is needed for management, instruction set is to determine how message forwards, and most basic forwarding behavior includes being transmitted to certain port, encapsulation forwards after rewriting message and abandons.
Owing to structure and the legacy network of SDN differ greatly, SDN equipment and traditional network equipment are also incompatible, add the investment risk of SDN, are unfavorable for the popularization of SDN technology.
Current SDN is introduced into large batch of commercialization, concrete agreement and networking temporarily and realizes, and is in the stage of improving, and only has some enterprises and attempts using OpenFlow agreement to carry out data process.And traditional ethernet network, universal along with PC and mobile terminal, come into huge numbers of families, big, medium-sized and small enterprises, all trades and professions.The switch product category of traditional ethernet is also very abundant, and the switch of various ranks and size all has distribution.
Current SDN or switching equipment only relate to SDN field, and traditional Ethernet switch also only relates to traditional ethernet network.The demand that SDN is compatible with legacy network cannot be met.
Summary of the invention
The invention provides a kind of method for converting protocol and device, solve existing switching equipment and cannot meet the problem to SDN Yu legacy network compatibility requirement.
A kind of method for converting protocol, including:
Judging mode of operation, described mode of operation comprises SDN pattern and legacy network pattern；
According to the mode of operation judged, the stream table received is carried out protocol translation.
Preferably, it is determined that mode of operation includes:
Mode of operation is judged according to preset configuration information；Or,
Mode of operation is judged according to the external command received.
Preferably, when the mode of operation judged is as legacy network pattern, the step that the stream table received carries out protocol translation includes:
The stream table received is changed according to following arbitrary agreement, obtains the exchange table entries of correspondence, particularly as follows:
Carry out being converted to media access control layer (MAC) address swap table according to Spanning-Tree Protocol (STP, SpanningTreeProtocol), or,
Carry out being converted to ACL according to accessing control list (ACL, AccessControlList) agreement, or,
Carry out being converted to routing table according to Routing Protocol, or,
Carry out being converted to Tag switching table according to tag distribution protocol (LDP, LabelDistributionProtocol).
Preferably, when the mode of operation judged is as SDN pattern, the step that the stream table received carries out protocol translation includes:
Abandon in list by what the matchfield territory that action in described stream table is the stream list item abandoning or not indicating process action joined ACL, described stream table is converted to acl list.
Preferably, when the mode of operation judged is as SDN pattern, the step that the stream table received carries out protocol translation includes:
When matchfield is MAC destination address in described stream table, the port of this MAC destination address with output (output) action is joined in MAC Address swap table, described stream table is converted to MAC Address swap table.
Preferably, when the mode of operation judged is as SDN pattern, the step that the stream table received carries out protocol translation includes:
When the matchfield of described stream table is multi-protocol label switching (T-MPLS) label (MPLSlabel), using this label as entering label, action is configured in actionset the label of SetMPLSlabel action as outgoing label, simultaneously using the port of (output) output action as going out port, add in Tag switching table together, described stream table is converted to Tag switching table.
Preferably, when the mode of operation judged is as SDN pattern, the step that the stream table received carries out protocol translation includes:
When the matchfield of described stream table is IP destination address, using this IP address as purpose IP address, using the port of output action as going out port, add to together in routing table, described stream table is converted to routing table.
Present invention also offers a kind of protocol translation device, including:
Mode of operation selects module, is used for judging that mode of operation, described mode of operation comprise SDN pattern and legacy network pattern；
Conversion module, for according to the mode of operation judged, carrying out protocol translation to the stream table received.
Preferably, described mode of operation selects module to include:
First selects unit, for judging mode of operation according to preset configuration information；
Second selects unit, for judging mode of operation according to the external command received.
Preferably, described conversion module includes:
Conventional network protocols unit, for being changed according to following arbitrary agreement by the stream table received, obtains the exchange table entries of correspondence, particularly as follows:
Carry out being converted to MAC Address swap table according to STP, or,
Carry out being converted to ACL according to ACL agreement, or,
Carry out being converted to routing table according to Routing Protocol, or,
Carry out being converted to Tag switching table according to LDP.
Preferably, described conversion module includes:
Stream table converting unit, abandons in list for what the matchfield territory that action in described stream table is the stream list item abandoning or not indicating process action joined ACL, described stream table is converted to acl list, or,
When matchfield is MAC destination address in described stream table, the port of this MAC destination address Yu output action is joined in MAC Address swap table, described stream table is converted to MAC Address swap table, or,
When the matchfield of described stream table is MPLSlabel, using this label as entering label, using the label of SetMPLSlabel action in actionset as outgoing label, simultaneously using the port of output action as going out port, add in Tag switching table together, described stream table is converted to Tag switching table, or
When the matchfield of described stream table is IP destination address, using this IP address as purpose IP address, using the port of output action as going out port, add to together in routing table, described stream table is converted to routing table.
The invention provides a kind of method for converting protocol and device, it is determined that mode of operation, described mode of operation comprises SDN pattern and legacy network pattern, according to the mode of operation judged, the stream table received is carried out protocol translation.Achieve the compatibility to SDN and legacy network, solve existing switching equipment and cannot meet the problem to SDN Yu legacy network compatibility requirement.
Accompanying drawing explanation
Fig. 1 is apparatus structure schematic diagram；
Fig. 2 is the flow chart of a kind of protocol translation method that embodiments of the invention one provide；
Fig. 3 is the flow chart of a kind of protocol translation method that embodiments of the invention two provide；
Fig. 4 is protocol translation principle schematic in embodiments of the invention two；
Fig. 5 is that SDNopenflow flows list structure schematic diagram；
Fig. 6 is device structure schematic diagram in embodiments of the invention three；
Fig. 7 is the flow chart of a kind of protocol translation method that embodiments of the invention three provide；
Fig. 8 is the flow chart of a kind of protocol translation method that embodiments of the invention four provide；
Fig. 9 is the structural representation of a kind of protocol translation device that embodiments of the invention five provide.
Detailed description of the invention
For current limitation, The embodiment provides a kind of protocol translation method and apparatus, namely can realize the exchange of SDN, it is also possible to legacy network is swapped.
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail.It should be noted that when not conflicting, the embodiment in the application and the feature in embodiment can combination in any mutually.
First in conjunction with accompanying drawing, embodiments of the invention one are illustrated.
The present invention proposes protocol translation device as shown in Figure 1, and this device comprises control unit, stream table converting unit, conventional network protocols unit, exchange table entries and core processing unit.
Control unit function is that this device is managed for configuration, and this device needs to run in different modes, by control unit other modules or unit being controlled and configures, if be operated under legacy network pattern, configuration being loaded automatically after startup.
Stream table converting unit function is that SDN agreement is resolved, and the configuration order issued according to control unit from message extracts the information required for exchange table entries, processes message for core processing unit.
The function of conventional network protocols unit is that the message to conventional network protocols processes, for instance message is swapped according to MAC Address swap table, abandon etc. processes.
The function of exchange table entries is that storage core processing unit processes various list items required for message, for instance MAC Address swap table, IP address table etc..
The function of core processing unit is the exchange information according to exchange table entries unit, and message is swapped, abandon etc. processes.Need depending on port, SDN agreement and conventional network protocols are converted mutually.
Use said apparatus, complete the flow process of protocol translation as shown in Figure 2:
Step 201, judgement mode of operation；
When switching equipment starts, it is possible to carry out model selection；Mode of operation is judged according to preset configuration information；Or, judge mode of operation according to the external command received.
Described mode of operation comprises SDN pattern and legacy network pattern.
Specifically include: equipment can configure manually or automatically through control unit, optionally enter SDN pattern or legacy network pattern.
Step 202, according to judge mode of operation, the stream table received is carried out protocol translation.
According to the pattern selected, switching equipment may operate in SDN pattern or legacy network pattern.Switching equipment involved in the embodiment of the present invention includes but not limited to switch, router, PTN device etc..
If 1 works in traditional mode, then starting conventional network protocols unit, traditionally the mode of network processes.
Conventional network protocols concrete meaning involved in the embodiment of the present invention includes but not limited to: the agreements such as STP, ACL, route, LDP, message is processed by core processing unit according to exchange table entries, and list item includes but not limited to acl list, MAC Address swap table, Tag switching table, routing table etc.；
If 2 work in SDN pattern, then start stream table converting unit, the stream table received is converted to conventional network protocols unit list item and processes.
The implication that the stream table received is converted to conventional network protocols unit list item is included but not limited to: stream table is changed into acl list, MAC Address swap table, Tag switching table, routing table protocol.
Under SDN pattern, carry out conversion specifically include following several ways:
A. the method converting acl list described in is: by action in stream table for abandoning (drop) or not indicating the matchfield territory flowing list item of process action, join abandoning in list of ACL；
B. the method converting MAC Address swap table described in is: when in stream table, matchfield is MAC destination address, is joined in MAC Address swap table by the port of this MAC destination address Yu output action.
C. the method being converted to Tag switching table described in is: when stream table matchfield is MPLSlabel, using this label as entering label, using the label of SetMPLSlabel action in actionset as outgoing label, simultaneously using the port of output action as going out port, add to together in Tag switching table.
D. the method being converted to routing table described in is: when matchfield is IP destination address, using this IP address as purpose IP address, using the port of output action as going out port, adds to together in routing table.
Below in conjunction with accompanying drawing, embodiments of the invention two are illustrated.
Embodiments provide a kind of protocol translation method, after device power, according to configuration information, shown in Fig. 3, selection works in legacy network pattern, start conventional network protocols unit, acl list, MAC Address swap table, Tag switching table, routing table etc. are configured in core processing unit.Message is processed by core processing unit according to these list items, and looks port needs, SDN agreement and conventional network protocols is converted mutually, as shown in Figure 4.
Below in conjunction with accompanying drawing, embodiments of the invention three are illustrated.
Embodiments provide a kind of protocol translation method, specifically include:
1, first device power configuration, shown in accompanying drawing 3, according to configuration information after device power, selects to work in SDN pattern；
2, start stream table converting unit, based on openflow SDN stream list structure as shown in Figure 5；3, the stream table of SDN that switching equipment will receive, converts the list item of core processing unit, configuration to, and acl list, MAC Address swap table, Tag switching table, routing table conversion are illustrated by below step 4,5,6 and 7 respectively, as shown in Figure 6；
4, when in stream table action for abandon (drop) or do not indicate process action stream list item matchfield territory, join abandoning in list of ACL.
5, when in stream table, matchfield is MAC destination address, as shown in Figure 7, the stream table of SDN enters switching equipment, message through flowing in the table converting unit MAC Address list item MAC destination address feeding switching equipment, is swapped the MAC destination address in matchfield for switch by equipment；
6, when in stream table, matchfield is MPLSlabel, as shown in Figure 7, the stream table of SDN enters switching equipment, and message through stream table converting unit entering in label list item label feeding switching equipment, is swapped the MPLSlabel in matchfield for switch by equipment；
7, when in stream table, matchfield is IP destination address, as shown in Figure 7, the stream table of SDN enters switching equipment, and equipment is sent IP destination address into the IP destination address in matchfield in the IP address list item of switching equipment through converting unit, for switch, message is swapped；
8, message is processed by core processing unit according to these list items.And look port needs, SDN agreement and conventional network protocols are converted mutually.
Switching equipment can select different network schemers according to configuration, namely can realize the network function of SDN, it is also possible to compatible traditional network exchange pattern.
Below in conjunction with accompanying drawing, embodiments of the invention four are illustrated.
Embodiments provide a kind of protocol translation method, can be applied in S-PTN and PTN product, after device power, download configuration information, configuration information can shift to an earlier date write device, it is also possible to manual configuration, according to different configuration informations, equipment selectively operating is in the S-PTN network schemer based on SDN, it is possible to select based on traditional network schemer, as shown in Figure 8.
If working in the network schemer based on SDN, then start stream table converting unit.Equipment advanced person's row clock synchronizes, then the stream table received is converted to conventional network protocols unit list item, being convertible into acl list, MAC Address swap table, Tag switching table, routing table according to configuration information, message is processed by core processing unit according to exchange table entries, or abandons or forward.
If working in based on traditional network schemer, equipment advanced person's row clock synchronizes, and then starts the conventional network protocols unit such as STP, ACL, route, LDP, acl list, MAC Address swap table, Tag switching table, routing table etc. is configured in core processing unit.Message is processed by core processing unit according to these list items.
Below in conjunction with accompanying drawing, embodiments of the invention five are illustrated.
Embodiments providing a kind of protocol translation device, the structure of this device is as it is shown in figure 9, include:
Mode of operation selects module 901, is used for judging that mode of operation, described mode of operation comprise SDN pattern and legacy network pattern；
Conversion module 902, for according to the mode of operation judged, carrying out protocol translation to the stream table received.
Preferably, described mode of operation selects module 901 to include:
First selects unit 9011, for judging mode of operation according to preset configuration information；
Second selects unit 9012, for judging mode of operation according to the external command received.
Preferably, described conversion module 902 includes:
Conventional network protocols unit 9021, for the stream table received is changed according to following arbitrary agreement:
STP, ACL, route, LDP；
Obtaining exchange table entries after conversion, described exchange table entries comprises following arbitrary:
Acl list, MAC Address swap table, Tag switching table, routing table.
Preferably, described conversion module 902 includes:
Stream table converting unit 9022, abandons in list for what the matchfield territory that action in described stream table is the stream list item abandoning or not indicating process action joined ACL, described stream table is converted to acl list, or,
When matchfield is MAC destination address in described stream table, the port of this MAC destination address Yu output action is joined in MAC Address swap table, described stream table is converted to MAC Address swap table, or,
When the matchfield of described stream table is MPLSlabel, using this label as entering label, using the label of SetMPLSlabel action in actionset as outgoing label, simultaneously using the port of output action as going out port, add in Tag switching table together, described stream table is converted to Tag switching table, or
When the matchfield of described stream table is IP destination address, using this IP address as purpose IP address, using the port of output action as going out port, add to together in routing table, described stream table is converted to routing table.
Above-mentioned protocol translation device can be integrated in switching equipment, switching equipment complete corresponding function.
The embodiment provides a kind of method for converting protocol and device, it is determined that mode of operation, described mode of operation comprises SDN pattern and legacy network pattern, according to the mode of operation judged, the stream table received is carried out protocol translation.Achieve the compatibility to SDN and legacy network, solve existing switching equipment and cannot meet the problem to SDN Yu legacy network compatibility requirement.
One of ordinary skill in the art will appreciate that all or part of step of above-described embodiment can use computer program flow process to realize, described computer program can be stored in a computer-readable recording medium, described computer program performs (such as system, unit, device etc.) on corresponding hardware platform, upon execution, including step of embodiment of the method one or a combination set of.
Alternatively, all or part of step of above-described embodiment can also use integrated circuit to realize, and these steps can be fabricated to integrated circuit modules one by one respectively, or the multiple modules in them or step are fabricated to single integrated circuit module realize.So, the present invention is not restricted to the combination of any specific hardware and software.
Each device/functional module/functional unit in above-described embodiment can adopt general calculation element to realize, and they can concentrate on single calculation element, it is also possible to is distributed on the network that multiple calculation element forms.
When each device/functional module/functional unit in above-described embodiment is using the form realization of software function module and as independent production marketing or use, it is possible to be stored in a computer read/write memory medium.Computer read/write memory medium mentioned above can be read only memory, disk or CD etc..
Any those familiar with the art, in the technical scope that the invention discloses, can readily occur in change or replace, should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain described in claim.
Claims (11)
1. a protocol translation method, it is characterised in that including:
Judging mode of operation, described mode of operation is software defined network SDN pattern or legacy network pattern；
According to the mode of operation judged, the stream table received is carried out protocol translation.
2. protocol translation method according to claim 1, it is characterised in that judge that mode of operation includes:
Mode of operation is judged according to preset configuration information；Or,
Mode of operation is judged according to the external command received.
3. protocol translation method according to claim 1, it is characterised in that when the mode of operation judged is as legacy network pattern, the step that the stream table received carries out protocol translation includes:
The stream table received is changed according to following arbitrary agreement, obtains the exchange table entries of correspondence, particularly as follows:
Carry out being converted to media access control layer MAC Address swap table according to Spanning-Tree Protocol STP, or,
Carry out being converted to ACL according to access control list ACL agreement, or,
Carry out being converted to routing table according to Routing Protocol, or,
Carry out being converted to Tag switching table according to tag distribution protocol LDP.
4. protocol translation method according to claim 1, it is characterised in that when the mode of operation judged is as SDN pattern, the step that the stream table received carries out protocol translation includes:
Abandon in list by what the matchfield territory that action in described stream table is the stream list item abandoning or not indicating process action joined ACL, described stream table is converted to acl list.
5. protocol translation method according to claim 1, it is characterised in that when the mode of operation judged is as SDN pattern, the step that the stream table received carries out protocol translation includes:
When matchfield is MAC destination address in described stream table, the port of this MAC destination address with output output action is joined in MAC Address swap table, described stream table is converted to MAC Address swap table.
6. protocol translation method according to claim 1, it is characterised in that when the mode of operation judged is as SDN pattern, the step that the stream table received carries out protocol translation includes:
When the matchfield of described stream table is multi-protocol label switching (T-MPLS) label MPLSlabel, using this label as entering label, action is configured in actionset the label of SetMPLSlabel action as outgoing label, simultaneously using the port of output output action as going out port, add in Tag switching table together, described stream table is converted to Tag switching table.
7. protocol translation method according to claim 1, it is characterised in that when the mode of operation judged is as SDN pattern, the step that the stream table received carries out protocol translation includes:
When the matchfield of described stream table is IP destination address, using this IP address as purpose IP address, using the port of output action as going out port, add to together in routing table, described stream table is converted to routing table.
8. a protocol translation device, it is characterised in that including:
Mode of operation selects module, is used for judging that mode of operation, described mode of operation comprise SDN pattern and legacy network pattern；
Conversion module, for according to the mode of operation judged, carrying out protocol translation to the stream table received.
9. protocol translation device according to claim 8, it is characterised in that described mode of operation selects module to include:
First selects unit, for judging mode of operation according to preset configuration information；
Second selects unit, for judging mode of operation according to the external command received.
10. protocol translation device according to claim 8, it is characterised in that described conversion module includes:
Conventional network protocols unit, for being changed according to following arbitrary agreement by the stream table received, obtains the exchange table entries of correspondence, particularly as follows:
Carry out being converted to MAC Address swap table according to STP, or,
Carry out being converted to ACL according to ACL agreement, or,
Carry out being converted to routing table according to Routing Protocol, or,
Carry out being converted to Tag switching table according to LDP.
11. protocol translation device according to claim 8, it is characterised in that described conversion module includes:
Stream table converting unit, abandons in list for what the matchfield territory that action in described stream table is the stream list item abandoning or not indicating process action joined ACL, described stream table is converted to acl list, or,
When matchfield is MAC destination address in described stream table, the port of this MAC destination address Yu output action is joined in MAC Address swap table, described stream table is converted to MAC Address swap table, or,
When the matchfield of described stream table is MPLSlabel, using this label as entering label, using the label of SetMPLSlabel action in actionset as outgoing label, simultaneously using the port of output action as going out port, add in Tag switching table together, described stream table is converted to Tag switching table, or
When the matchfield of described stream table is IP destination address, using this IP address as purpose IP address, using the port of output action as going out port, add to together in routing table, described stream table is converted to routing table.
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| CN201410816884.8A CN105791237B (en) | 2014-12-24 | 2014-12-24 | Protocol conversion method and device |
| PCT/CN2015/084513 WO2016101602A1 (en) | 2014-12-24 | 2015-07-20 | Protocol conversion method and device |
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| CN114449054A (en) * | 2020-10-16 | 2022-05-06 | 广州海格通信集团股份有限公司 | Intercommunication method, device, equipment and system of software defined network and traditional network |
| CN114449054B (en) * | 2020-10-16 | 2024-02-02 | 广州海格通信集团股份有限公司 | Intercommunication method, device, equipment and system of software defined network and traditional network |
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| CN105791237B (en) | 2020-05-08 |
| WO2016101602A1 (en) | 2016-06-30 |
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