CN102137016A - Network address translation table entry hot backup method and device - Google Patents
Network address translation table entry hot backup method and device Download PDFInfo
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- CN102137016A CN102137016A CN2011100645008A CN201110064500A CN102137016A CN 102137016 A CN102137016 A CN 102137016A CN 2011100645008 A CN2011100645008 A CN 2011100645008A CN 201110064500 A CN201110064500 A CN 201110064500A CN 102137016 A CN102137016 A CN 102137016A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
- H04L61/2503—Translation of Internet protocol [IP] addresses
- H04L61/2514—Translation of Internet protocol [IP] addresses between local and global IP addresses
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Abstract
The embodiment of the invention provides a network address translation table entry hot backup method and a network address translation table entry hot backup device. The method comprises the following steps of: creating a network address translation (NAT) table entry corresponding to an Internet protocol (IP) message according to the received IP message; determining a service type corresponding to the IP message; and determining whether to perform hot backup on the NAT table entry or not according to a corresponding relationship between the service type and a hot backup operation and the service type corresponding to the IP message. The embodiment of the invention reduces the hot backup processing load of NAT equipment, and improves the hot backup flexibility and hot backup efficiency of the NAT equipment.
Description
Technical field
The embodiment of the invention relates to the communication technology, relates in particular to the heat backup method and the device of a kind of network address translation (NetworkAddress Translation is called for short NAT) list item.
Background technology
Along with popularizing of internet technique, the quantity of terminal equipment rapidly increases, each terminal equipment all needs to obtain a legal Internet protocol (Internet Protocol when communicating by letter with the internet, be called for short IP) (for example: the IPv4 address), so legitimate ip address becomes scarce resource in the address.In order to solve the deficiency of legitimate ip address, can utilize network address translation (Network Address Translation, be called for short NAT) equipment, one group of IP map addresses is organized the IP address to another, for example: the legitimate ip address that the private IP address of one group of LAN is mapped to the internet.In order to guarantee the reliability of NAT device, can carry out Hot Spare to the NAT list item that NAT device is created in the prior art, promptly in NAT device, create or delete a NAT list item, all this list item information is passed to the backup NAT device, and in the backup NAT device, create or delete above-mentioned NAT list item.
But, because NAT device is all created the NAT list item to all IP messages,, also can create a plurality of NAT list items for some professional IP message, this has all caused the Hot Spare of NAT device to handle the increase of load, the reduction of Hot Spare flexibility and Hot Spare efficient.
Summary of the invention
The embodiment of the invention provides a kind of heat backup method and device of network address translation table item, handles load with the Hot Spare that reduces NAT device, and the Hot Spare flexibility and the Hot Spare efficient that improve NAT device.
The embodiment of the invention provides a kind of heat backup method of network address translation table item, comprising:
According to the IP message that receives, create the NAT list item of described IP message correspondence;
Determine described IP message corresponding service type;
According to the corresponding relation of type of service and Hot Spare operation, and described IP message corresponding service type, determine whether described NAT list item is carried out Hot Spare.
The embodiment of the invention also provides a kind of heat backup device of network address translation table item, comprising:
Creation module is used for creating the NAT list item of described IP message correspondence according to the IP message that receives;
Determination module is used for determining described IP message corresponding service type;
Processing module is used for the corresponding relation according to type of service and Hot Spare operation, and described IP message corresponding service type, determines whether described NAT list item is carried out Hot Spare.
As shown from the above technical solution, the embodiment of the invention is according to the corresponding relation and the IP message corresponding service type of type of service and Hot Spare operation, determine whether the NAT list item is carried out Hot Spare, can avoid the NAT list item of all IP messages is all carried out the Hot Spare processing, thereby the Hot Spare that has reduced NAT device is handled load, and the Hot Spare flexibility and the Hot Spare efficient that have improved NAT device.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The schematic flow sheet of the heat backup method of the network address translation table item that Fig. 1 provides for the embodiment of the invention one;
One structural representation of the heat backup device of the network address translation table item that Fig. 2 a provides for the embodiment of the invention two;
Another structural representation of the heat backup device of the network address translation table item that Fig. 2 b provides for further embodiment of this invention;
Another structural representation of the heat backup device of the network address translation table item that Fig. 3 provides for the embodiment of the invention three.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The schematic flow sheet of the heat backup method of the network address translation table item that Fig. 1 provides for the embodiment of the invention one, as shown in Figure 1, the heat backup method of the network address translation table item of present embodiment can comprise:
101,, create the NAT list item of above-mentioned IP message correspondence according to the IP message that receives;
Optionally, NAT device specifically can be created the NAT list item of above-mentioned IP message correspondence according to the IP message that receives.Wherein, the NAT list item can comprise source IP address, purpose IP address and destination interface information at least.
102, determine above-mentioned IP message corresponding service type;
Optionally, NAT device determines that above-mentioned IP message corresponding service type can adopt multiple mode to realize.
For example, NAT device can be determined and above-mentioned purpose port information corresponding service type according to the destination interface information in the above-mentioned IP message.For example: if the destination slogan in this IP message is 80, explanation is WEB service (promptly based on the HTML (Hypertext Markup Language) service of (Hyper Text Transfer Protocol is called for short HTTP)); If the destination slogan in this IP message is 25, the Simple Mail Transfer protocol business of (Simple Mail Transfer Protocol is called for short SMTP) that is based on is described; If the destination slogan in this IP message is 110, the business of the 3rd version (Post Office Protocol 3 is called for short POP3) that is based on electronic post office's host-host protocol is described; If the destination slogan in this IP message is 139, the business that is based on NetBIOS enhanced user interface (Network Basic Input/Output System Enhanced User Interface is called for short NetBEUI) agreement is described.
Again for example, NAT device can be determined and above-mentioned service identification corresponding service type according to the service identification in the above-mentioned NAT list item.Wherein, above-mentioned service identification is ALG (the Application Level Gateway of NAT device, be called for short ALG) when creating the NAT list item according to the information in the application layer data load of above-mentioned IP message (for example: destination interface information), identify corresponding protocols, thereby determine concrete service identification.For example: the ALG of NAT device when creating the NAT list item according to the information in the application layer data load of this IP message, identifying corresponding protocols is ip voice agreement (Voice over Internet Protocol, be called for short VoIP), the speech business that is based on IP is described; NAT device receives the IP message, the ALG of this NAT device is according to the information in the application layer data load of this IP message, identifying corresponding protocols is file transfer protocol (FTP) (File Transfer Protocol is called for short FTP), and the data service that is based on FTP is described.
103, according to the corresponding relation of type of service and Hot Spare operation, and above-mentioned IP message corresponding service type, determine whether the NAT list item of above-mentioned IP message correspondence is carried out Hot Spare.
Optionally, NAT device can be determined the Hot Spare operation to above-mentioned IP message corresponding service type correspondence according to the corresponding relation of type of service and Hot Spare operation, and above-mentioned Hot Spare operation comprises to be carried out Hot Spare and do not carry out Hot Spare.
If the Hot Spare corresponding with above-mentioned IP message corresponding service type is operating as and carries out Hot Spare, then above-mentioned NAT list item is carried out Hot Spare; If the Hot Spare corresponding with above-mentioned IP message corresponding service type is operating as and do not carry out Hot Spare, then above-mentioned NAT list item is not carried out Hot Spare.Like this, NAT has realized according to type of service the NAT list item being carried out selectable Hot Spare, rather than the NAT list item of all IP message correspondences is all carried out Hot Spare.
Optionally, before 103, NAT device can also further be set up the corresponding relation of above-mentioned type of service and Hot Spare operation, and is as shown in table 1.
The corresponding relation of table 1 type of service and Hot Spare operation
| Type of service | The Hot Spare operation |
| VoIP | Carry out Hot Spare |
| Video traffic | Carry out Hot Spare |
| The WEB service | Do not carry out Hot Spare |
| Business based on FTP | Do not carry out Hot Spare |
| Business based on SMTP | Do not carry out Hot Spare |
| Business based on POP3 | Do not carry out Hot Spare |
| Business based on Netbeui | Do not carry out Hot Spare |
For example: for the WEB service, whenever open a webpage, will produce more than 30 TCP stream,, will create more than 30 NAT list item if NAT device carries out Hot Spare to above-mentioned TCP stream.Because the transmission time of above-mentioned TCP stream is very short, after several seconds, these NAT list items will wear out (deleted).Therefore, NAT device can cause the delay of NAT list item Hot Spare, thereby cause the Hot Spare of NAT device to handle the increase of load and the reduction of Hot Spare efficient owing to create and/or the above-mentioned NAT list item information of a large amount of transmission of deletion.When the switching of NAT device taken place when because some NAT list item also not backup packet loss may occur and retransmit phenomenon fully, thereby caused the interruption of WEB service.So at one comparatively in the preferred embodiment of the present invention, NAT device is to WEB service not carrying out Hot Spare.
Again for example: for VoIP, a VoIP of every foundation connects can comprise at least one signaling flow and four RTPs (Real-time Transport Protocol is called for short RTP).When the switching of NAT device taken place, immediately some NAT list item also not backup fully, the IP message packet loss phenomenon that may occur receiving, but owing to need not after the UDP packet loss to retransmit, thus can not cause the interruption of VoIP.So at one comparatively in the preferred embodiment of the present invention, NAT device carries out Hot Spare to VoIP.
In the present embodiment, owing to be corresponding relation and IP message corresponding service type according to type of service and Hot Spare operation, determine whether the NAT list item is carried out Hot Spare, to realize that the NAT list item is carried out selectable Hot Spare, so can avoid because NAT device is all created the NAT list item to all IP messages, thereby the Hot Spare that has reduced NAT device is handled load, and the Hot Spare flexibility and the Hot Spare efficient that have improved NAT device.
Need to prove: for aforesaid each method embodiment, for simple description, so it all is expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not subjected to the restriction of described sequence of movement, for example: NAT device is set up the corresponding relation of above-mentioned type of service and Hot Spare operation as long as before 103, does not have positive connection with 101,102 execution sequence.Secondly, those skilled in the art also should know, the embodiment described in the specification all belongs to preferred embodiment, and related action and module might not be that the present invention is necessary.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, do not have the part that describes in detail among certain embodiment, can be referring to the associated description of other embodiment.
One structural representation of the heat backup device of the network address translation table item that Fig. 2 a provides for the embodiment of the invention two, shown in Fig. 2 a, the heat backup device of the network address translation table item of present embodiment can comprise:
The heat backup device of the network address translation table item that method can be provided by the embodiment of the invention among the invention described above embodiment one is realized.
Optionally, shown in Fig. 2 b, in the present embodiment really cover half piece 22 can comprise:
First determines submodule 221, is used for the destination interface information according to the above-mentioned IP message, obtains and above-mentioned purpose port information corresponding service type; And/or
Second determines submodule 223, be used for service identification according to above-mentioned NAT list item, obtain and above-mentioned service identification corresponding service type, wherein, above-mentioned service identification be ALG when the NAT list item is created according to the information in the application layer data load of above-mentioned IP message (for example: destination interface information) definite.
It is pointed out that only to show among Fig. 2 b to comprise that simultaneously first determines the situation of submodule and second definite submodule, in optional embodiment, also can only comprise in above-mentioned two submodules.
Particularly, the processing module 23 in the present embodiment can determine whether above-mentioned NAT list item is carried out Hot Spare according to the corresponding relation of type of service and Hot Spare operation, and above-mentioned Hot Spare operation comprises to be carried out Hot Spare and do not carry out Hot Spare; If the Hot Spare corresponding with above-mentioned IP message corresponding service type is operating as and carries out Hot Spare, then above-mentioned NAT list item is carried out Hot Spare; If the Hot Spare corresponding with above-mentioned IP message corresponding service type is operating as and do not carry out Hot Spare, then above-mentioned NAT list item is not carried out Hot Spare.
Optionally, as shown in Figure 3, the heat backup device of the network address translation table item of present embodiment can further include sets up module 31, be used to set up the corresponding relation of above-mentioned type of service and Hot Spare operation, according to this corresponding relation, determine the Hot Spare operation corresponding for processing module 23 with above-mentioned IP message corresponding service type.
In the present embodiment, because processing module is corresponding relation and IP message corresponding service type according to type of service and Hot Spare operation, determine whether the NAT list item is carried out Hot Spare, to realize that the NAT list item is carried out selectable Hot Spare, so can avoid because NAT device is all created the NAT list item to all IP messages, thereby the Hot Spare that has reduced NAT device is handled load, and the Hot Spare flexibility and the Hot Spare efficient that have improved NAT device.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (8)
1. the heat backup method of a network address translation table item is characterized in that, comprising:
According to the Internet protocol IP message that receives, create the network address translation NAT list item of described IP message correspondence;
Determine described IP message corresponding service type;
According to the corresponding relation of type of service and Hot Spare operation, and described IP message corresponding service type, determine whether described NAT list item is carried out Hot Spare.
2. method according to claim 1 is characterized in that, described definite described IP message corresponding service type comprises:
According to the destination interface information in the described IP message, determine and described destination interface information corresponding service type; Perhaps
According to the service identification in the described NAT list item, determine and described service identification corresponding service type that wherein, described service identification is that ALG is determined according to the information in the application layer data load of described IP message when described NAT list item is created.
3. method according to claim 1 is characterized in that, described corresponding relation according to type of service and Hot Spare operation, and described IP message corresponding service type determine whether described NAT list item is carried out Hot Spare, comprising:
According to the corresponding relation of type of service and Hot Spare operation, determine the Hot Spare operation corresponding with described IP message corresponding service type, described Hot Spare operation comprises to be carried out Hot Spare and not to carry out Hot Spare;
If the Hot Spare corresponding with described IP message corresponding service type is operating as and carries out Hot Spare, then described NAT list item is carried out Hot Spare;
If the Hot Spare corresponding with described IP message corresponding service type is operating as and do not carry out Hot Spare, then described NAT list item is not carried out Hot Spare.
4. according to the described method of the arbitrary claim of claim 1 to 3, it is characterized in that described method also comprises:
Set up the corresponding relation of described type of service and Hot Spare operation.
5. the heat backup device of a network address translation table item is characterized in that, comprising:
Creation module is used for creating the network address translation NAT list item of described IP message correspondence according to the Internet protocol IP message that receives;
Determination module is used for determining described IP message corresponding service type;
Processing module is used for the corresponding relation according to type of service and Hot Spare operation, and described IP message corresponding service type, determines whether described NAT list item is carried out Hot Spare.
6. device according to claim 5 is characterized in that, described determination module comprises:
First determines submodule, is used for the destination interface information according to described IP message, obtains and described destination interface information corresponding service type; And/or
Second determines submodule, be used for service identification according to described NAT list item, obtain and described service identification corresponding service type, wherein, described service identification is that ALG is determined according to the information in the application layer data load of described IP message when the NAT list item is created.
7. device according to claim 5 is characterized in that,
If the Hot Spare corresponding with described IP message corresponding service type is operating as and carries out Hot Spare, then described processing module is used for described NAT list item is carried out Hot Spare;
If the Hot Spare corresponding with described IP message corresponding service type is operating as and do not carry out Hot Spare, then described processing module is not carried out Hot Spare to described NAT list item.
8. according to the described device of the arbitrary claim of claim 5 to 7, it is characterized in that described device also comprises sets up module, be used to set up the corresponding relation of described type of service and Hot Spare operation.
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| CN2011100645008A CN102137016A (en) | 2011-03-17 | 2011-03-17 | Network address translation table entry hot backup method and device |
| PCT/CN2011/083663 WO2012122832A1 (en) | 2011-03-17 | 2011-12-08 | Hot backup method and apparatus for network address translation entry |
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| CN2011100645008A CN102137016A (en) | 2011-03-17 | 2011-03-17 | Network address translation table entry hot backup method and device |
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| CN102137016A true CN102137016A (en) | 2011-07-27 |
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| CN2011100645008A Pending CN102137016A (en) | 2011-03-17 | 2011-03-17 | Network address translation table entry hot backup method and device |
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Cited By (5)
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| WO2012122832A1 (en) * | 2011-03-17 | 2012-09-20 | 华为技术有限公司 | Hot backup method and apparatus for network address translation entry |
| CN107733808A (en) * | 2017-11-20 | 2018-02-23 | 新华三技术有限公司 | A kind of flow transmission method and device |
| CN108200223A (en) * | 2017-12-28 | 2018-06-22 | 新华三技术有限公司 | Carrier class networks address-translating device CGN backup methods and device |
| CN112968970A (en) * | 2021-02-26 | 2021-06-15 | 杭州迪普信息技术有限公司 | Configuration information backup method and device and network equipment |
| CN114793221A (en) * | 2022-03-21 | 2022-07-26 | 新华三信息安全技术有限公司 | NAT (network Address translation) association table processing method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012122832A1 (en) * | 2011-03-17 | 2012-09-20 | 华为技术有限公司 | Hot backup method and apparatus for network address translation entry |
| CN107733808A (en) * | 2017-11-20 | 2018-02-23 | 新华三技术有限公司 | A kind of flow transmission method and device |
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| CN108200223A (en) * | 2017-12-28 | 2018-06-22 | 新华三技术有限公司 | Carrier class networks address-translating device CGN backup methods and device |
| CN112968970A (en) * | 2021-02-26 | 2021-06-15 | 杭州迪普信息技术有限公司 | Configuration information backup method and device and network equipment |
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| CN114793221A (en) * | 2022-03-21 | 2022-07-26 | 新华三信息安全技术有限公司 | NAT (network Address translation) association table processing method and device |
| CN114793221B (en) * | 2022-03-21 | 2024-02-09 | 新华三信息安全技术有限公司 | NAT association table processing method and device |
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| Publication number | Publication date |
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| WO2012122832A1 (en) | 2012-09-20 |
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Application publication date: 20110727 |