CN102104397A - Link protection method and device - Google Patents
Link protection method and device Download PDFInfo
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- CN102104397A CN102104397A CN2009102434019A CN200910243401A CN102104397A CN 102104397 A CN102104397 A CN 102104397A CN 2009102434019 A CN2009102434019 A CN 2009102434019A CN 200910243401 A CN200910243401 A CN 200910243401A CN 102104397 A CN102104397 A CN 102104397A
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Abstract
The embodiment of the invention provides a link protection method and a link protection device. The method comprises the following steps of: performing link protection on equipment needed to be subjected to link protection through an electric protection module; and when the equipment needed to be subjected to link protection is abnormal, switching data traffic in the link to a standby link of the electric protection module for transmission through an electric switch of the electric protection module. Therefore, microsecond-scale switching is performed through the electric switch, the problem of link flash is solved in the process of switching the link, and a physical layer of the link cannot be disconnected; therefore, user non-perceptive switching of the link is realized.
Description
Technical field
The present invention relates to network communication field, relate in particular to a kind of guard method and device of link.
Background technology
At present, along with network technology in the live extensive use of each aspect of country, internet security exposes a lot of problems, in order effectively to eliminate hidden network danger, generally need in network, handle various safety services by each aspect deployment forthright equipment, as fire compartment wall, safe blocking equipment etc.Can there be another problem again but in network, dispose forthright equipment, promptly when the forthright device fails of disposing, can causes the interruption of proper communication link, and a series of problems such as initiation route flapping, load balancing.
In the prior art scheme, generally needs are carried out light protection module of equipment increase of link protection, this light protection module is adopt the quick induction light path signal of optical switch unusual.When equipment normally moved, data traffic flowed out after by this device processes, and is irrelevant with the light protection module; And take place when unusual when equipment, the optical switch of this light protection module just can be responded to fast, and automatically data traffic is switched to the straight-through link of light path of light protection module, comes isolated fault equipment with this, guarantees the proper communication of link, thereby realizes link protection.
From the scheme of above-mentioned prior art as can be seen; link can take place when the optical switch of light protection module switches to be dodged disconnected; though the time that the link physical layer breaks is very short; but also can cause the problem that a series of users can perceive; as packet loss, route flapping, load balancing etc., this scheme can not guarantee user's unaware switching of link.
Summary of the invention
The embodiment of the invention provides a kind of guard method and device of link, and link dodges disconnected problem in the time of can solving link switchover, can not cause the physical layer of link to disconnect, thereby the user's unaware that has realized link is switched.
The embodiment of the invention provides a kind of guard method of link, and described method comprises:
By the electric protection module equipment that needs carry out link protection is carried out link protection; the equipment that carries out link protection when described needs takes place when unusual, the electric switch of the data traffic in the link by described electric protection module is switched in the reserve link of described electric protection module to transmit.
The embodiment of the invention also provides a kind of protective device of link, comprises unit exception judging unit and electric protection module, wherein:
The unit exception judging unit is used for by the signal of telecommunication on the link of surveying the equipment need carry out link protection, judges whether the equipment that described needs carry out link protection takes place unusually;
Described electric protection module; be used for taking place when unusual, the electric switch of the data traffic in the link by described electric protection module switched in the reserve link of described electric protection module and transmit when equipment that the described needs of described unit exception judgment unit judges carry out link protection.
By the above-mentioned technical scheme that provides as can be seen; the embodiment of the invention is by the electric protection module equipment that needs carry out link protection to be carried out link protection; the equipment that carries out link protection when described needs takes place when unusual, the electric switch of the data traffic in the link by described electric protection module is switched in the reserve link of described electric protection module to transmit.So just can carry out the switching of microsecond magnitude by electric switch, link dodges disconnected problem when having solved link switchover, can not cause the physical layer of link to disconnect, thereby the user's unaware that has realized link is switched.
Description of drawings
The schematic flow sheet of the embodiment of the invention 1 link protection method that provides is provided Fig. 1;
Fig. 2 by the embodiment of the invention 1 the implementation structure schematic diagram of act instantiation;
Fig. 3 by the embodiment of the invention 1 another implementation structure schematic diagram of act instantiation;
Fig. 4 is the structural representation of 2 generators of the embodiment of the invention;
Fig. 5 is another structural representation of 2 generators of the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of guard method and device of link; the equipment that carries out link protection when needs takes place when unusual, the electric switch of the data traffic in the link by this electric protection module is switched in the reserve link of this electric protection module to transmit.Carry out the switching of microsecond magnitude like this by electric switch, link dodges disconnected problem when having solved link switchover, can not cause the physical layer of link to disconnect, thereby the user's unaware that has realized link is switched.
Be better to describe the embodiment of the invention, now in conjunction with the accompanying drawings specific embodiments of the invention described, the schematic flow sheet of the embodiment of the invention 1 link protection method that provides as shown in Figure 1, described method comprises:
Step 11: the equipment that needs carry out link protection is carried out link protection by the electric protection module.
In this step, carrying out link protection by the electric protection module is to carry out data routing to switch, and just selects data traffic is sent to the equipment that need carry out link protection in the inside of this electric protection module, still directly transmits on reserve link; Only switch at link layer; even link layer can not receive correct Frame; produce a spot of packet loss; but because the electric protection module can be carried out the switching of microsecond magnitude by electric switch; physical layer at link is that perception is less than disconnecting so; communicating pair remains connection, and sends out Frame mutually.
Specifically,, do not receive light signal, will cause the disconnection of optical link physical layer port and the disconnection of link layer if surpass 625 microseconds owing to carry out light signal when switching at every turn.On the one hand, all surpass 625 microseconds at present the switching time of the optical switch of main flow; On the other hand; because the electric protection module need be carried out opto-electronic conversion; the synchronization frame of optical link terminates on the electric protection module like this; rather than carry out at needs terminating on the equipment of link protection; remeasuring when link layer switches with regard to the synchronization frame that do not need to carry out optical link; if and adopt the light protection module; the synchronization frame of optical link carries out at needs terminating on the equipment of link protection; and when switching, link layer need carry out the remeasuring of synchronization frame of optical link; this measurement normally surpasses 1 millisecond; therefore adopt the electric protection module that the equipment that needs carry out link protection is carried out the switching that link protection just can realize the microsecond magnitude; the physical layer that guarantees link is communicated with; and just the link layer of link disconnects, and has so just realized that user's unaware of link is switched.In the specific implementation process; above-mentioned electric protection module can be passed through field programmable gate array (Field-programmable gate array; FPGA) or Application Specific Integrated Circuit (Application-specific integrated circuit ASIC) realizes.
In addition; in the specific implementation process; the equipment that carries out link protection when needs just often; described electric protection module can also further directly be passed through the reserve link transparent transmission with the link layer protocol message in the electric protection module, and other data traffics that need carry out Business Processing are handled by the equipment that described needs carry out link protection.Above-mentioned link layer protocol message can be set according to actual needs in advance, for example can be link layer protocol messages such as routing protocol packet or ARP protocol massages; Like this; when carrying out link protection by the electric protection module; because the link layer protocol message is directly to pass through the reserve link transparent transmission; like this when link switchover takes place; the transmission path of link layer protocol message is constant; link layer protocol just can not perceive switching of link, thereby the unaware that can realize link layer protocol is switched.In the specific implementation process, this electric protection module can be passed through network processing unit, and (Network Processor NP) waits device to realize.
Step 12: the equipment that carries out link protection when needs takes place when unusual, the electric switch of the data traffic in the link by the electric protection module is switched in the reserve link of this electric protection module to transmit.
In the specific implementation process; judge whether this equipment that need carry out link protection takes place unusually; can judge by the signal of telecommunication on the detecting link whether this equipment that need carry out link protection takes place unusually by the electric protection module; if the signal of telecommunication that detects on the link is unusual; it is unusual to judge that then this equipment that need carry out link protection takes place; just can carry out handover operation this moment, and link is carried out corresponding protection.
By the enforcement of above technical scheme, just can carry out the switching of microsecond magnitude by electric switch, link dodges disconnected problem when having solved link switchover, can not cause the physical layer of link to disconnect, thereby the user's unaware that has realized link is switched.
For instance, be illustrated in figure 2 as the implementation structure schematic diagram of the embodiment of the invention 1 instantiation of lifting, among the figure: have forthright equipment C on the link between router-A and the router B, this forthright equipment C is exactly the equipment that need carry out link protection; What link to each other with this forthright equipment C is the electric protection module, by this electric protection module forthright equipment C is carried out link protection.
When forthright equipment C just often, data traffic is transferred among the forthright equipment C and handles; The electric protection module judges by the signal of telecommunication on the detecting link whether this forthright equipment C takes place unusually; take place when unusual when detecting this forthright equipment C; it is unusual to judge that then forthright equipment C takes place; just the electric switch by the electric protection module switches to the data traffic in the link in the reserve link of this electric protection module and transmits; thereby guarantee that the link between router-A and the router B is normal, realize that user's unaware of link is switched.
In addition, in present embodiment 1, can also take place when unusual, further the optical switch of the data traffic in the link by the light protection module be switched in the reserve link of described smooth protection module and transmit in described electric protection module.By the enforcement of above technical scheme, just can all effectively protect various links such as optical link, current source roads, increased the versatility of link protection.
In addition, in present embodiment 1, can also take place at the main business plate that needs carry out the equipment of link protection the data traffic in the link to be switched to carry out work in the standby business board earlier when unusual; Also take place when unusual at this standby business board then, again the electric switch of the data traffic in the link by described electric protection module switched in the reserve link of described electric protection module and transmit.By the enforcement of above technical scheme, just can form the multi-stage protection device, link is carried out three-dimensional comprehensively protection, further improved the reliability of link.
For instance; be illustrated in figure 3 as another implementation structure schematic diagram of present embodiment 1 instantiation of lifting, among the figure: on the link between router-A and the router B, exist and form the multi-stage protection device jointly by light protection module, electric protection module and service protection module.
At first guarantee the link proper communication by the service protection module, play the effect of ground floor link protection, go up to take place when unusual at the business module A of this service protection module (being the main business plate) when needs carry out the equipment of link protection, this equipment that need carry out link protection is switched among the business module B (being standby business board) of service protection module and carry out work; When the service protection module breaks down, by the electric protection module service protection module that breaks down is isolated again, the flow in the link is switched in the reserve link of electric protection module and transmit, on electric transparent transmission veneer, carry out transparent transmission; When electric protection module and service protection module all break down; data traffic in the link is switched in the reserve link of light protection module by the light protection module; transmit with the straight-through link of light path; thereby realized the multi-stage protection of link; link is carried out three-dimensional comprehensively protection, improved the reliability of link.
The embodiment of the invention 2 also provides a kind of protective device of link, is illustrated in figure 4 as the structural representation of 2 generators of the embodiment of the invention, and described device comprises unit exception judging unit 41 and electric protection module 42, wherein:
Described unit exception judging unit 41 is used for judging by the signal of telecommunication on the link of surveying the equipment that need carry out link protection whether the equipment that need carry out link protection takes place unusually.If the signal of telecommunication that unit exception judging unit 41 detects on the link is unusual, it is unusual to judge that then this equipment that need carry out link protection takes place, and electric protection this moment module 42 just can be carried out handover operation, and link is carried out corresponding protection.
Described electric protection module 42; be used for judging the equipment that need carry out link protection and take place when unusual, the electric switch of the data traffic in the link by described electric protection module switched in the reserve link of described electric protection module and transmit when unit exception judging unit 41.
In the specific implementation process, above-mentioned electric protection module 42 can realize by FPGA or ASIC.
By the enforcement of above technical scheme, just can carry out the switching of microsecond magnitude by electric switch, dodge disconnected problem thereby solved link, can not cause the physical layer of link to disconnect, realized that user's unaware of link is switched.
In addition; above-mentioned electric protection module 42 can also be used for judging that when described unit exception judging unit 41 equipment that described needs carry out link protection just often; with link layer protocol message transparent transmission in the reserve link of electric protection module 42, and other data traffics that need carry out Business Processing are handled by the equipment that described needs carry out link protection.Like this; when carrying out link protection by electric protection module 42; because the link layer protocol message is directly to pass through the reserve link transparent transmission; like this when link switchover takes place; the transmission path of link layer protocol message is constant; link layer protocol just can not perceive switching of link, thereby the unaware that can realize link layer protocol is switched.In the specific implementation process, this electric protection module 42 can realize by devices such as NP.
In addition, be illustrated in figure 5 as another structural representation of 2 generators of the embodiment of the invention, also can comprise light protection module 43 in the above device, form the multi-stage protection device by described smooth protection module 43 and electric protection module 42 equipment that needs carry out link protection is carried out link protection, wherein;
Described smooth protection module 43 is used for taking place when unusual in described electric protection module 42, the optical switch of the data traffic in the link by described smooth protection module 43 is switched in the reserve link of described smooth protection module 43 to transmit.
By the enforcement of above technical scheme, just can all effectively protect various links such as optical link, current source roads, increased the versatility of link protection.
In addition, as shown in Figure 5, described device also can comprise service protection module 44, form the multi-stage protection device by described smooth protection module 43, electric protection module 42 and service protection module 44 equipment that needs carry out link protection is carried out link protection, wherein:
Described service protection module 44 is used for taking place when unusual at the main business plate that described needs carry out the equipment of link protection, the data traffic in the described link is switched to carry out work in the standby business board.
By the enforcement of above technical scheme, just can form the multi-stage protection device, link is carried out three-dimensional comprehensively protection, improved the reliability of link.
In addition; as shown in Figure 5; also can comprise selector switch 45 in described device, any two or equipment that any one comes needs to be carried out link protection that this selector switch 45 is used for selective light protection module 43, electric protection module 42 and service protection module 44 carry out link protection.That is to say that can form the multi-stage protection device by this selector switch 45, selective light protection module 43, electric protection module 42 and 44 3 grades of combinations of service protection module realize protection layer by layer; Also can select any two in three protection modules to make up as required, realize second class protection link; Can also select any one in three protection modules as required, realize first class of protection link.
By the enforcement of above technical scheme, just increased the flexibility of link protection device, but enlarged the choice.
The above protective device can integratedly be arranged at described needs to carry out in the equipment of link protection; Also can be arranged to independent functional entity, the equipment that carries out link protection with described needs maintains the connection.
In sum, the embodiment of the invention can be carried out the switching of microsecond magnitude by electric switch, and link dodges disconnected problem when having solved link switchover, can not cause the physical layer of link to disconnect, thereby the user's unaware that has realized link is switched; Can also further the link layer protocol message directly be passed through the reserve link transparent transmission in the electric protection module, and other data traffics that need carry out Business Processing are handled by the equipment that described needs carry out link protection, thereby the unaware that can realize link layer protocol is switched; In addition, can also all effectively protect, increase the versatility of link protection various links such as optical link, current source roads; Can also form the multi-stage protection device, link is carried out three-dimensional comprehensively protection, improve the reliability of link; Can also increase simultaneously the flexibility of link protection device by selector switch, but enlarge the choice.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the embodiment of the invention discloses; the variation that can expect easily or replacement all 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 range of claim.
Claims (10)
1. the guard method of a link is characterized in that, described method comprises:
By the electric protection module equipment that needs carry out link protection is carried out link protection; the equipment that carries out link protection when described needs takes place when unusual, the electric switch of the data traffic in the link by described electric protection module is switched in the reserve link of described electric protection module to transmit.
2. the method for claim 1 is characterized in that, described method also comprises:
The equipment that carries out link protection when described needs just often; described electric protection module is with link layer protocol message transparent transmission in the reserve link of electric protection module, and other data traffics that need carry out Business Processing are handled by the equipment that described needs carry out link protection.
3. method as claimed in claim 1 or 2 is characterized in that, described method also comprises:
When described electric protection module takes place when unusual, the optical switch of the data traffic in the link by the light protection module switched in the reserve link of described smooth protection module and transmit.
4. method as claimed in claim 1 or 2 is characterized in that, described method also comprises:
The main business plate that carries out the equipment of link protection when described needs takes place when unusual, the data traffic in the described link is switched to carry out work in the standby business board.
5. method as claimed in claim 1 or 2 is characterized in that, described method also comprises:
Described electric protection module judges by the signal of telecommunication on the detecting link whether the equipment that described needs carry out link protection takes place unusually; If the signal of telecommunication that detects on the link is unusual, judge that then the equipment that described needs carry out link protection takes place unusual.
6. the protective device of a link is characterized in that, comprises unit exception judging unit and electric protection module, wherein:
The unit exception judging unit is used for by the signal of telecommunication on the link of surveying the equipment need carry out link protection, judges whether the equipment that described needs carry out link protection takes place unusually;
Described electric protection module; be used for taking place when unusual, the electric switch of the data traffic in the link by described electric protection module switched in the reserve link of described electric protection module and transmit when equipment that the described needs of described unit exception judgment unit judges carry out link protection.
7. device as claimed in claim 6 is characterized in that,
The equipment that described electric protection module also is used for carrying out link protection when the described needs of described unit exception judgment unit judges just often; with link layer protocol message transparent transmission in the reserve link of electric protection module, and other data traffics that need carry out Business Processing are handled by the equipment that described needs carry out link protection.
8. device as claimed in claim 6 is characterized in that described device also comprises the light protection module, forms the multi-stage protection device by described smooth protection module and electric protection module the equipment that needs carry out link protection is carried out link protection;
Described smooth protection module is used for taking place when unusual in described electric protection module, the optical switch of the data traffic in the link by described smooth protection module is switched in the reserve link of described smooth protection module to transmit.
9. device as claimed in claim 8 is characterized in that described device also comprises the service protection module, forms the multi-stage protection device by described smooth protection module, electric protection module and service protection module the equipment that needs carry out link protection carried out link protection,
Described service protection module is used for taking place when unusual at the main business plate that described needs carry out the equipment of link protection, the data traffic in the described link is switched to carry out work in the standby business board.
10. device as claimed in claim 9 is characterized in that, described device also comprises:
Selector switch, any two or the equipment that any one comes needs to be carried out link protection that are used for selective light protection module, electric protection module and service protection module carry out link protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910243401 CN102104397B (en) | 2009-12-22 | 2009-12-22 | Link protection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910243401 CN102104397B (en) | 2009-12-22 | 2009-12-22 | Link protection method and device |
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| Publication Number | Publication Date |
|---|---|
| CN102104397A true CN102104397A (en) | 2011-06-22 |
| CN102104397B CN102104397B (en) | 2013-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200910243401 Active CN102104397B (en) | 2009-12-22 | 2009-12-22 | Link protection method and device |
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| CN (1) | CN102104397B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102571457A (en) * | 2012-02-28 | 2012-07-11 | 成都市华为赛门铁克科技有限公司 | Method for triggering switching of bypass equipment, and method and device for switching bypass equipment |
| CN102957607A (en) * | 2012-11-06 | 2013-03-06 | 华为技术有限公司 | Method, related device and system for switching over links |
| CN102970168A (en) * | 2012-11-30 | 2013-03-13 | 华为技术有限公司 | Line switching method, device and system |
| CN103117799A (en) * | 2013-01-18 | 2013-05-22 | 武汉迈威光电技术有限公司 | Optical path direct connection method for optical communication equipment with power interruption |
| CN106471482A (en) * | 2015-06-19 | 2017-03-01 | 华为技术有限公司 | A kind of optical-switch control method and device |
| CN109995456A (en) * | 2019-02-27 | 2019-07-09 | 中国人民解放军战略支援部队信息工程大学 | The multistage of concatenation equipment applied to SDH transmission leads directly to protective device and method |
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| CN101350636A (en) * | 2008-09-04 | 2009-01-21 | 北京星网锐捷网络技术有限公司 | Method and system for link redundant backup base on photoelectric multiplexing port |
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| CN1905415A (en) * | 2005-07-25 | 2007-01-31 | 日立通讯技术株式会社 | Optical communication network, node apparatus and method for relieving path fault |
| CN1949700A (en) * | 2006-10-09 | 2007-04-18 | 华为技术有限公司 | Method and apparatus for mixed network protection |
| CN101350636A (en) * | 2008-09-04 | 2009-01-21 | 北京星网锐捷网络技术有限公司 | Method and system for link redundant backup base on photoelectric multiplexing port |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102571457A (en) * | 2012-02-28 | 2012-07-11 | 成都市华为赛门铁克科技有限公司 | Method for triggering switching of bypass equipment, and method and device for switching bypass equipment |
| CN102957607A (en) * | 2012-11-06 | 2013-03-06 | 华为技术有限公司 | Method, related device and system for switching over links |
| CN102970168A (en) * | 2012-11-30 | 2013-03-13 | 华为技术有限公司 | Line switching method, device and system |
| CN102970168B (en) * | 2012-11-30 | 2016-01-27 | 华为技术有限公司 | A kind of circuit switching method, Apparatus and system |
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| CN106471482A (en) * | 2015-06-19 | 2017-03-01 | 华为技术有限公司 | A kind of optical-switch control method and device |
| CN106471482B (en) * | 2015-06-19 | 2019-05-03 | 华为技术有限公司 | A kind of optical-switch control method and device |
| US10439736B2 (en) | 2015-06-19 | 2019-10-08 | Huawei Technologies Co., Ltd. | Optical switch control method, and apparatus |
| CN109995456A (en) * | 2019-02-27 | 2019-07-09 | 中国人民解放军战略支援部队信息工程大学 | The multistage of concatenation equipment applied to SDH transmission leads directly to protective device and method |
| CN109995456B (en) * | 2019-02-27 | 2020-07-24 | 中国人民解放军战略支援部队信息工程大学 | Multistage straight-through protection device and method applied to serial connection equipment for SDH transmission |
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| CN102104397B (en) | 2013-09-11 |
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