CN106961355A - Network system and the method for realizing network disaster recovery with shared standby router - Google Patents

Network system and the method for realizing network disaster recovery with shared standby router Download PDF

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Publication number
CN106961355A
CN106961355A CN201710214704.2A CN201710214704A CN106961355A CN 106961355 A CN106961355 A CN 106961355A CN 201710214704 A CN201710214704 A CN 201710214704A CN 106961355 A CN106961355 A CN 106961355A
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China
Prior art keywords
router
couple
path
transmission route
route device
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Granted
Application number
CN201710214704.2A
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Chinese (zh)
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CN106961355B (en
Inventor
陈相舟
丁慧霞
汪洋
赵永柱
郭云涛
杨储华
陈炳伟
芮兰兰
王志强
元梦莹
赵百捷
吴庆
王智慧
李哲
方帅
滕玲
高强
赵宏斌
金燊
庞思睿
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Beijing University of Posts and Telecommunications
China Electric Power Research Institute Co Ltd CEPRI
Information and Telecommunication Branch of State Grid Jibei Electric Power Co Ltd
Information and Telecommunication Branch of State Grid Shaanxi Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Beijing University of Posts and Telecommunications
China Electric Power Research Institute Co Ltd CEPRI
Information and Telecommunication Branch of State Grid Jibei Electric Power Co Ltd
Information and Telecommunication Branch of State Grid Shaanxi Electric Power Co Ltd
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Application filed by State Grid Corp of China SGCC, Beijing University of Posts and Telecommunications, China Electric Power Research Institute Co Ltd CEPRI, Information and Telecommunication Branch of State Grid Jibei Electric Power Co Ltd, Information and Telecommunication Branch of State Grid Shaanxi Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201710214704.2A priority Critical patent/CN106961355B/en
Publication of CN106961355A publication Critical patent/CN106961355A/en
Application granted granted Critical
Publication of CN106961355B publication Critical patent/CN106961355B/en
Expired - Fee Related legal-status Critical Current
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/22—Alternate routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/74—Address processing for routing

Abstract

The method for realizing network disaster recovery the embodiments of the invention provide network system and with shared standby router, in this method, when first couple in router perceives connected first transmission route device and broken down, determined from each shared standby router to replace the target of the first transmission route device to share standby router；Then the first couple in router shares standby router as intermediate path node using target, and the address information of standby router is shared based on target, the Work route path between the first corresponding interconnection router of the first couple in router is calculated, the first routed path is used as；Then the routing information of the first routed path is sent to other routers in the first routed path by the first couple in router；Finally, other routers in the first couple in router and the first routed path forward target data flow according to the first routed path.The quantity that standby router is shared in this programme is few, so the low cost of whole network system.

Description

Network system and the method for realizing network disaster recovery with shared standby router
Technical field
The present invention relates to technical field of communication network, more particularly to network system and net is realized with shared standby router The method of network fault recovery.
Background technology
In communication network technology growing today, people significantly improve to the dependence of network, and network failure is to people Normal life influence be it is very important, thus, network survivability strategy as ensure network run well means, just It is particularly important；One complete network survivability strategy should include following several parts：The discovery of network failure, positioning, Statement and recover, wherein, the recovery of network failure be in network survivability strategy people be concerned about the most a bit.
In the prior art, with the growth of data business volume, multitiered network will be increasingly becoming the core of next generation network, example Such as, multitiered network can be just deployed in by carrying the backbone network of huge data traffic, and multitiered network includes being used to be responsible for data Packet and forwarding client layer, and for be responsible for Large Copacity length away from data transmission service layer；Visitor is provided with client layer Family layer equipment, including each router；It is provided with service layer's equipment in service layer, including the above-mentioned router of connection and service layer Add-drop multiplexer.
As shown in figure 1, existing client layer equipment can include interconnection router 1, transmission route device 2 and access route Device 3.Couple in router is the router being directly connected with user network, positioned at network edge；And interconnection router is then relative For couple in router, positioned at the router of network center；Transmission route device as interconnection router and couple in router it Between communication link in intermediate node, highly important role is play in network system, some transmission route device lose Effect, then can cause the communication link fails residing for the transmission route device, cause network failure.
In network system involved by legacy network fault recovery method, each transmission route device to should have one it is standby Router；After the transmission route device in couple in router and a certain communication link of interconnection router breaks down, this Communication link fails, i.e. network are broken down, now, and this is replaced by the standby router corresponding to the transmission route device that fails The transmission route device of failure, couple in router corresponding to the transmission route device of failure is used as intermediate path section using the standby router Point, calculates new routed path, the routing information of new routed path then is sent into each router that new routed path is passed through, So that each router that hereafter new routed path is passed through needs the communication chain by above-mentioned failure according to the forwarding of new routed path Road instead of the communication link of above-mentioned failure the data traffic transmitted, this corresponding communication link of new routed path, complete The recovery of network failure.
But, the quantity of the transmission route device in the whole network system of prior art is numerous, each transmission route Device to should have the quantity of the standby router in a standby router, thus network system be it is numerous, it is substantial amounts of standby Router causes the problem of whole network system has high cost.
The content of the invention
The purpose of the embodiment of the present invention is to provide a kind of network system and realize network failure with shared standby router The method of recovery, on the premise of ensureing that network can realize automatic recover, to reduce the cost of whole network system.Particular technique Scheme is as follows：
For up to above-mentioned purpose, in a first aspect, the embodiments of the invention provide a kind of network system, the network system includes Client layer equipment, the client layer equipment, including：Couple in router, interconnection router, to connect couple in router with interconnection Multiple transmission route devices of router and at least one shared standby router；
The total quantity that standby router is shared in the network system is less than the quantity of the transmission route device, each access Be stored with the address information of each shared standby router in router；
Wherein, the first couple in router, as any couple in router in the client layer equipment, when perceive and its When first transmission route device of connection breaks down, determined from each shared standby router to replace described first to transmit The target of router shares standby router；Standby router is shared as intermediate path node using the target, and based on target Between the address information of shared standby router, the first corresponding interconnection router of calculating first couple in router Work route path, is used as the first routed path；By the routing information of first routed path be sent to the first via by Other routers in path；
Other routers in first couple in router and first routed path, according to the first via by road Footpath forwards target data flow, the target data flow be first couple in router and first interconnection router it Between need the data traffic that is forwarded by the first transmission route device.
It is preferred that, the network segment residing for any one shared standby router and a biography in the client layer equipment The network segment residing for defeated router is identical；
First couple in router, when perceiving connected first transmission route device and breaking down, judgement is It is no to there is the shared standby router that same network segment is in the first transmission route device；If it does, determining to replace State the first transmission route device target share standby router be：The shared standby of same network segment is in the first transmission route device Use router；If it does not, determining that the shared standby router of target to replacement the first transmission route device is：It is residing The network segment and the closest standby router of the network segment residing for the first transmission route device.
It is preferred that, the first transmission route device after faults itself reparation, sends to first couple in router and repaiied Multiple successful information；
First couple in router, after the reparation successful information is received, is obtained with first transmission route Device is intermediate path node, and the Work route path between first couple in router and first interconnection router is made For secondary route path；The routing information in the secondary route path is sent to other routes in the secondary route path Device；
Other routers in first couple in router and the secondary route path, according to the secondary route road Footpath forwards the target data flow.
It is preferred that, first couple in router after the reparation successful information is received, is calculated and passed with described first Defeated router is intermediate path node, the Work route road between first couple in router and first interconnection router Footpath, is used as secondary route path.
It is preferred that, first couple in router after the reparation successful information is received, is carried from target database Take out using the first transmission route device as intermediate path node, first couple in router and first interconnection router Between Work route path, be used as secondary route path；
Wherein, in the target database there be in transmission route device normal work record, couple in router and mutual link By the Work route path between device.
It is preferred that, the network system also includes：Service layer's equipment of physical link, institute are provided for the client layer equipment Stating service layer's equipment includes：Multiple add-drop multiplexers；
First couple in router, after first routed path is calculated, by the road of first routed path Footpath information is sent to each first add-drop multiplexer that the first routed path is passed through；
Each described first add-drop multiplexer, according to first routed path, and using each with each self-corresponding road The target data flow is forwarded by the physical link pre-established between device.
Second aspect, the embodiments of the invention provide a kind of side that network disaster recovery is realized with shared standby router Method, methods described is applied to be included with any one above-mentioned network system, methods described：
It is shared standby from each when first couple in router perceives connected first transmission route device and broken down Determined in router to replace the target of the first transmission route device to share standby router；
First couple in router shares standby router as intermediate path node using the target, and common based on target The address information of standby router is enjoyed, the work between the first corresponding interconnection router of first couple in router is calculated Make routed path, be used as the first routed path；
The routing information of first routed path is sent to first routed path by first couple in router In other routers；
Other routers in first couple in router and first routed path are according to the first via by road Footpath forwards target data flow；Wherein, the target data flow is first couple in router and the described first mutual link By the data traffic for needing to be forwarded by the first transmission route device between device.
It is preferred that, the network segment residing for any one shared standby router and a biography in the client layer equipment The network segment residing for defeated router is identical；
It is shared from each when first couple in router perceives connected first transmission route device and broken down The step of target to replacement the first transmission route device shares standby router is determined in standby router, including：
When first couple in router perceives connected first transmission route device and broken down, judge whether to deposit The shared standby router of same network segment is being in the first transmission route device；
If it does, determining that the shared standby router of target to replacement the first transmission route device is：With it is described First transmission route device is in the shared standby router of same network segment；
If it does not, determining that the shared standby router of target to replacement the first transmission route device is：It is residing The network segment and the closest standby router of the network segment residing for the first transmission route device.
It is preferred that, other routers in first couple in router and first routed path are according to described After the step of one routed path forwards target data flow, methods described also includes：
First couple in router after the reparation successful information transmitted by the first transmission route device is received, obtain with The first transmission route device is intermediate path node, between first couple in router and first interconnection router Work route path, is used as secondary route path；
The routing information in the secondary route path is sent to the secondary route path by first couple in router In other routers；
Other routers in first couple in router and the secondary route path, according to the secondary route road Footpath forwards the target data flow.
It is preferred that, first couple in router is receiving the reparation successful information transmitted by the first transmission route device Afterwards, obtain using the first transmission route device as intermediate path node, first couple in router and the described first mutual link By the Work route path between device, the step of as secondary route path, including：
First couple in router is calculated with the first transmission route device after the reparation successful information is received For intermediate path node, the Work route path between first couple in router and first interconnection router, as Secondary route path.
It is preferred that, first couple in router is receiving the reparation successful information transmitted by the first transmission route device Afterwards, obtain using the first transmission route device as intermediate path node, first couple in router and the described first mutual link By the Work route path between device, the step of as secondary route path, including：
First couple in router, is extracted with institute after the reparation successful information is received from target database The first transmission route device is stated for intermediate path node, the work between first couple in router and first interconnection router Make routed path, be used as secondary route path；
Wherein, in the target database there be in transmission route device normal work record, couple in router and mutual link By the Work route path between device.
It is preferred that, the network system also includes：Service layer's equipment of physical link, institute are provided for the client layer equipment Stating service layer's equipment includes：Multiple add-drop multiplexers；Methods described also includes：
First couple in router is after first routed path is calculated, by the path of first routed path Information is sent to each first add-drop multiplexer that the first routed path is passed through；
Other routers in first couple in router and first routed path are according to the first via by road The step of footpath forwards target data flow, including：
Other routers in first couple in router and first routed path are according to the first via by road Footpath, target data flow is forwarded by the first add-drop multiplexer with being each connected；
Each described first add-drop multiplexer according to first routed path, and using each with each self-corresponding route The physical link pre-established between device forwards the target data flow.
As seen from the above, in scheme provided in an embodiment of the present invention, the first couple in router perceives connected When one transmission route device breaks down, the target to replace the first transmission route device is determined from each shared standby router Shared standby router；Then the first couple in router shares standby router as intermediate path node using target, and based on mesh The address information of the shared standby router of mark, calculates the work between the first corresponding interconnection router of the first couple in router Make routed path, be used as the first routed path；Then the routing information of the first routed path is sent to by the first couple in router Other routers in first routed path；Finally, other routers in the first couple in router and the first routed path are pressed Target data flow is forwarded according to the first routed path；Wherein, target data flow is the first couple in router and the first mutual link By the data traffic for needing to be forwarded by the first transmission route device between device.
Prior art is contrasted, scheme provided in an embodiment of the present invention can ensure network failure after the failure of transmission route device It is automatic to recover, and it is few to share the quantity of standby router in network system, so the low cost of whole network system；In addition, by When transmission route device fails, any one shared standby router can replace the transmission route device of failure, so only When all shared standby routers are unavailable, the recovery of network failure can not be just completed, therefore, when shared standby router Quantity at least two when, the network availability of network system is high in the scheme that the embodiment of the present invention is provided；In addition, this hair It is mainly the above-mentioned first via by road from the time required for network failure to network recovery in the scheme that bright embodiment is provided The calculating process in footpath and other routers that the routing information of the first routed path is sent in the first routed path are disappeared The time of consumption, and the time needed for the calculating process of the first routed path and the transmission process of routing information is short, thus it is of the invention The scheme of embodiment can realize the fast quick-recovery of network failure.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the client layer equipment being made up of in the prior art interconnection router, transmission route device and couple in router Topological diagram；
Fig. 2 be the embodiment of the present invention in by interconnection router, transmission route device, couple in router and shared alternate routing The topological diagram of the client layer equipment of device composition；
Fig. 3 is the structural representation of network system provided in an embodiment of the present invention；
Fig. 4 is the first of the method provided in an embodiment of the present invention that network disaster recovery is realized with shared standby router Schematic flow sheet；
Fig. 5 is second of the method provided in an embodiment of the present invention that network disaster recovery is realized with shared standby router Schematic flow sheet；
Fig. 6 is the third of the method provided in an embodiment of the present invention that network disaster recovery is realized with shared standby router Schematic flow sheet；
Fig. 7 has interconnection router and the client layer equipment of transmission route device for displaying in example provided in an embodiment of the present invention Topological diagram；
Fig. 8 is the saving and shared standby router quantity of transmission class router in example provided in an embodiment of the present invention Graph of a relation；
Fig. 9 be the present embodiments relate to the first couple in router, the first transmission route device, the first interconnection router with And target shares the annexation schematic diagram between standby router.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
Simply introduced firstly the need of for network system provided in an embodiment of the present invention.
Network system provided in an embodiment of the present invention, including client layer equipment, the client layer equipment include：Access route Device, interconnection router, to connect couple in router and multiple transmission route devices of interconnection router and at least one is shared Standby router；The total quantity that standby router is shared in network system is less than the quantity of transmission route device, each access route Be stored with the address information of each shared standby router in device.
It should be noted that the shared standby router in network system is the router in stand-by state, in transmission In the case of router normal work, shared standby router can leave unused in a network, only occur event in transmission route device After barrier, shared standby router can just replace the transmission route device broken down, now, share the state of standby router by standby Switch to working condition with state.
As shown in figure 3, network system includes the first interconnection router, 1~x of interconnection router, the first transmission route device, biography Defeated 1~y of router, the first couple in router, 1~z of couple in router, target share standby router and shared alternate routing 1~m of device, it is clear that, m is less than y.It should be noted that the couple in router of each in Fig. 3 can be shared by any one Standby router interconnection router corresponding with the couple in router is connected.
It is appreciated that any couple in router in network system is all possibly as the first couple in router, as long as this connects Enter the transmission route device in any communication link between the corresponding interconnection router of router, i.e., connected transmission Router breaks down.
With Fig. 2 for example, in Fig. 2 network system include two interconnection routers 1, three transmission route devices 2, six Couple in router 3 and two shared standby routers 2 ', it is clear that, the quantity that standby router is shared in network system is less than The quantity of transmission route device.If it is appreciated that using the network failure recovery method of prior art, needed in network system pre- First deployment and the standby router of transmission route device equivalent amount, if for example, being deployed with three transmission routes in network system Device, then be necessarily required to dispose three standby routers.So contrast prior art, network system provided in an embodiment of the present invention Cost is lower.
It should be noted that in network system provided in an embodiment of the present invention, the quantity of transmission route device must not drop below Two；And the quantity of shared standby router can be based on actual need in the case where meeting the total quantity less than transmission route device Set, for example, being the transmission route device for needing in network system to lay special stress on protecting by the quantity set of shared standby router Quantity, or according to the quantity that standby router is shared in the flow load ratio setting network system of client layer.
For example, including 5 transmission route devices in network system, the flow of client layer transmission accounts for the ratio of network total flow For 70%, under emergency case, all flows of network will be transmitted from client layer, to ensure that client layer is just under emergency case Often work, shared standby router is also required to turn into the transmission route device of a normal work；So burst feelings can be calculated The number of transmission route device is required for client layer under condition：5/70%=7.14 is 8, therefore in this case, should at least use 3 Shared standby router
In addition, the address information of each the shared standby router stored in couple in router, can be IP (agreement interconnected between Internet Protocol, network) address, MAC (Media Access Control, media interviews Control) address and port information etc..
A kind of method for realizing network disaster recovery with shared standby router provided in an embodiment of the present invention, applied to upper The network system stated, as shown in figure 4, methods described includes：
S101：It is common from each when first couple in router perceives connected first transmission route device and broken down Enjoy and being determined in standby router to replace the target of the first transmission route device to share standby router.
It is emphasized that in practical application, being deposited between the first corresponding interconnection router of the first couple in router In at least two communication links, the first transmission route device described herein is the transmission route device in a wherein communication link, Obvious, when the first transmission route device breaks down, the communication link residing for the first transmission route device, which disconnects, to fail, but the Original communication connection between other routers in one couple in router and network system is still present, e.g., the first access Still there are other communication links between router and the first interconnection router.
For example, in network system, every communication link between couple in router and interconnection router is designed as not surpassing Cross 50% peak load link utilization, so as to when certain communication link breaks down, it is necessary to pass through the communication link Data traffic share in other communication links transmit, so the first couple in router still can by other communication links to First interconnection router data traffic transmitting, still, this can cause the increase of other communication link loads, increase packet loss and prolong When, so needing the communication link of the newly-built replacement failure communication link immediately.
, can be with when the first transmission route device breaks down as the first optional implementation of the embodiment of the present invention A shared standby router is randomly choosed from each shared standby router, then by selected shared standby router Standby router is shared as the target to replace the first transmission route device.
As second of optional implementation of the embodiment of the present invention, in network system provided in an embodiment of the present invention, The network segment residing for any one shared standby router is identical with the network segment residing for a transmission route device in client layer equipment. For example, in the routing system, four transmission route device a~d, two shared standby router a ' and c ' are configured with altogether, wherein Transmission route device a and c are in same network segment with shared standby router a ' and c ' respectively.
In second of optional implementation, as shown in figure 4, above-mentioned first couple in router perceive it is connected When first transmission route device breaks down, the mesh to replace the first transmission route device is determined from each shared standby router The step of mark shares standby router (S101), can include：
S1011：When first couple in router perceives connected first transmission route device and broken down, judge whether In the presence of the shared standby router that same network segment is in the first transmission route device.
In actual use, each couple in router can with base in the inner pre-recorded each transmission route device and The residing network segment of shared standby router difference, to judge whether to be in the shared standby of same network segment with the first transmission route device Use router；Corresponding IP address, and each biography can also be distinguished according to each transmission route device and shared standby router The IP address of defeated router or shared standby router distinguishes corresponding subnet mask, to judge whether to pass with first Defeated router is in the shared standby router of same network segment；It should be noted that judging two by IP address and subnet mask Whether the method in the same network segment belongs to known technology to individual router, and the embodiment of the present invention is no longer discussed in detail herein.
If step S1011 judged result is yes, step S1012 is performed：It is determined that to replace the first transmission route device Target share standby router be：The shared standby router of same network segment is in the first transmission route device.
For example, the first transmission route device is transmission route device a, in the first couple in router record transmission route device a and The shared standby router a ' network segment is 192.168.1.0/24, then can now determine that shared standby router a ' is target Shared standby router.
It is well known by those skilled in the art that two routers between being in phase same network segment can be with direct communication, and locate Need to realize by gateway in two routers of different segment and communicate；In actual applications, transmission route device or shared standby Router will not be configured in the same network segment between coupled interconnection router, and in order to ensure transmission route device and access The speed that data traffic is forwarded between router, couple in router is typically configured in same net with the transmission route device corresponding to it Section.
Spanning gateway is needed to communicate between standby router and interconnection router from the foregoing, it will be observed that shared, so in order to ensure the The speed that data traffic is forwarded between one couple in router and the first interconnection router, it may be determined that to replace first to transmit road Sharing standby router by the target of device is：The shared standby router of same network segment is in the first transmission route device, to ensure Target is shared not to need spanning gateway to communicate between standby router and the first couple in router.
Certainly, if the shared standby router for being in same network segment with the first transmission route device in network system has multiple, One can be then randomly choosed from multiple shared standby routers of same network segment are in the first transmission route device as above-mentioned Target shares standby router.
If step S1011 judged result is no, step S1013 is performed：It is determined that to replace the first transmission route device Target share standby router be：The closest standby router of the network segment residing for the residing network segment and the first transmission route device.
It should be noted that the proximity relations between two network segments refers to corresponding to two network segments difference as common knowledge Proximity relations in logical topology；It is well known by those skilled in the art that the residing network segment of two routers difference is closer to two The forwarding speed of data traffic is faster between individual router.
Recorded for example, existing in network system in two shared standby router a ' and b ', the first couple in router：First The network segment of transmission route device is 192.168.1.0/24, and two shared standby router a ' and the network segment residing b ' are corresponded to respectively 192.168.2.0/24 and 192.168.3.0/24, because network segment 192.168.1.0/24 and 192.168.2.0/24 is closest, So can now determine that shared standby router a ' is that target shares standby router.
Certainly, in actual use, when configuring the network segment of each shared standby router, on the one hand, it is contemplated that depositing The quantity that the transmission route device of standby router is shared in same network segment is more as far as possible, to ensure the in network system as far as possible One couple in router can find the shared standby router that same network segment is in the first transmission route device.
For example, in network system, four transmission route device a~d are configured with altogether, transmission route device a and b are in same net Section, transmission route device a, c and d are in the different network segments, if if now configuring the shared standby router a ' and c ' network segment point It is not：The network segment residing for the network segment residing for transmission route device a and transmission route device c, then transmission route device a~c institutes are corresponding respectively connect Enter router, can be found when as the first couple in router and be in the shared standby of same network segment with the first transmission route device Router；And if the network segment for now configuring shared standby router a ' and c ' is respectively：The network segment and transmission residing for transmission route device c The network segment residing for router d, then only transmission route device c and d distinguish corresponding couple in router, be used as first access route The shared standby router that same network segment is in the first transmission route device can be found during device.
On the other hand, it may be considered that backup router is preferentially arranged in extremely important transmission route device in network system The residing network segment.For example, in network system, four transmission route device a~d are configured with altogether, and one is shared standby road By device a ', because transmission route device b is of crucial importance, then the network segment that can now configure shared standby router a ' is：Transmit road As the network segment residing for device b.
As shown in figure 4, S102：First couple in router shares standby router as intermediate path node using target, and base Shared in target between the address information of standby router, the first corresponding interconnection router of the first couple in router of calculating Work route path, be used as the first routed path.
It is appreciated that after the first transmission route device breaks down and failed, the communication residing for above-mentioned first transmission route device Link is equally failed, and the new communication link of the failure communication link can be substituted by now needing to go to obtain one again, and target Shared standby router as new communication link an intermediate node, the first couple in router need to calculate calculate first with The target shares new Work route path of the standby router as intermediate path node, to determine the new communication link；Certainly, The computational methods in Work route path belong in the prior art, and the embodiment of the present invention is not described in detail herein.
It should be noted that in actual applications, a communication chain between the corresponding interconnection router of couple in router Lu Zhong, the quantity of transmission route device is at least in one, also, a communication link, can also include other network equipments, Such as gateway, so needing to calculate other nodes that routed path passes through to determine new communication link to need.
S103：The routing information of first routed path is sent to other in the first routed path by the first couple in router Router.
S104：Other routers in first couple in router and the first routed path forward mesh according to the first routed path Mark data traffic；Wherein, target data flow is to be needed between the first couple in router and the first interconnection router by first The data traffic that transmission route device is forwarded.
It is appreciated that it is suitable to include two-way converting of the data traffic in path node in the routing information of routed path Sequence, and each address information for jumping path node；After each the routing information of the first routed path is obtained, above-mentioned first connects Each local routing table can be updated according to the routing information by entering other routers in router and the first routed path, Hereafter, other routers in the first couple in router and the first routed path are directed to above-mentioned target data flow, with reference to each From after the routing table being locally stored, will according to the first routed path forward target data flow, the first couple in router with A new communication link is formed between first interconnection router, the recovery of network failure is completed.
It is understood that above-mentioned target data flow is referred to after the first transmission route device breaks down, first connects Enter the data traffic for needing to be forwarded between router and the first interconnection router by the first transmission route device, that is, need to lead to The data traffic that destination communications link where crossing the first transmission route device is transmitted, for example, former destination communications link is responsible for transmission Source IP address is any IP address in address field 192.168.0.3~192.168.0.223, and purpose IP address is 192.168.1.25 data traffic, then after destination communications link failure, new communication link starts follow-up for transmitting Source IP address is any IP address in 192.168.0.3~192.168.0.223, and purpose IP address is 192.168.1.25 number According to flow.
Such as Fig. 2, the first couple in router is shown in the couple in router of the leftmost side to illustrate in 6 couple in routers, the One transmission route device is shows the transmission route device of the leftmost side in 3 transmission route devices, the first interconnection router is 2 transmission roads By showing the interconnection router of the leftmost side in device, target shares standby router to show most right in 2 shared standby routers Dotted line in the shared standby router of side, figure represented after the first transmission route device failure, the first couple in router and first mutual Even disconnected between router by the communication link of the first transmission route device.After the scheme provided using the present invention, connect first A communication link that standby router is shared by target is formed in entering between router and the first interconnection router, it is disconnected to replace The communication link opened.
As it was previously stated, couple in router is typically configured in the same network segment with the transmission route device corresponding to it, i.e., above-mentioned the One couple in router and the first transmission route device are in the same network segment；But target determined by step S101 shares alternate routing Device and the first couple in router may not be in the same network segments, so the first couple in router shares standby router with target Between data traffic transmission speed, be likely less than the biography of data traffic between the first couple in router and the first transmission route device Defeated speed.
Therefore after the failure of the first transmission route device is successfully repaired, the destination communications link before failure can be recovered, that is, existed On the basis of either method embodiment shown in above-mentioned Fig. 4 or Fig. 5, after step s 104, as shown in fig. 6, this method may be used also With including：
S105：First couple in router is obtained after the reparation successful information transmitted by the first transmission route device is received Using the first transmission route device as intermediate path node, the Work route road between the first couple in router and the first interconnection router Footpath, is used as secondary route path.
It is appreciated that the first transmission route device is after the failure of itself is repaired, can be actively to the first couple in router Send and repair successful information.
In the embodiment of the present invention, the first preferred implementation for obtaining the secondary route path, secondary route road are used as Footpath can be obtained by calculating, i.e., above-mentioned first couple in router is receiving the success of the reparation transmitted by the first transmission route device After information, obtain using the first transmission route device as intermediate path node, between the first couple in router and the first interconnection router Work route path, the step of as secondary route path (S105), can include：
First couple in router is calculated using the first transmission route device as intermediate path section after reparation successful information is received Point, the Work route path between the first couple in router and the first interconnection router, is used as secondary route path.
As second of preferred implementation for obtaining the secondary route path, above-mentioned first couple in router is being received After reparation successful information transmitted by first transmission route device, obtain using the first transmission route device as intermediate path node, first Work route path between couple in router and the first interconnection router, can the step of as secondary route path (S105) With including：
First couple in router is extracted after reparation successful information is received from target database with the first transmission road It is intermediate path node by device, the Work route path between the first couple in router and the first interconnection router is used as second Routed path；
Wherein, in target database there be in transmission route device normal work record, couple in router and interconnection router Between Work route path.
It is appreciated that in embodiments of the present invention, can be provided with a target database, the target database and record Have in all transmission route device normal works, the Work route path between couple in router and interconnection router, to cause In the first transmission route device after fault restoration, can quickly and easily it obtain before failure generation, with the first transmission route device For intermediate path node, the Work route path between the first couple in router and the first interconnection router.
As shown in fig. 6, S106：The routing information in secondary route path is sent to secondary route road by the first couple in router Other routers in footpath.
S107：Other routers in first couple in router and secondary route path, are forwarded according to secondary route path Target data flow.
Step S106~S107 detailed process similarly, is obtaining secondary route with step S103~S104 detailed process After the routing information in path, other routers in above-mentioned first couple in router and secondary route path can be according to the path The respective local routing table of information updating, hereafter, other routers in the first couple in router and secondary route path are directed to Above-mentioned target data flow, after the routing table being each locally stored, will forward target data according to secondary route path Flow, forms the communication link corresponding to secondary route path between the first couple in router and the first interconnection router, and Now, above-mentioned target shares standby router can be in stand-by state again again.
It is well known by those skilled in the art that multitiered network includes client layer and service layer, so being removed in network system Outside client layer equipment, also including service layer's equipment.Service layer in such as aforementioned background art, multitiered network is used to be responsible for great Rong Amount it is long away from data transmission, client layer is then used for the packet and forwarding of data.
Common multitiered network such as SDH over WDM nets, IP over WDM nets (internet directly run on light), ATM over SDH nets etc..By IP over WDM net exemplified by, with optical transport technology development and IP traffic amount it is at full speed Increase, people need a new network system to carry substantial amounts of business.IP over WDM networks are by IP layers and two layers of photosphere Composition, Each performs its own functions for two-tier network, IP layer responsible packet and forwarding, following photosphere then responsible Large Copacity length away from data Transmission, optical channel is provided for IP layers；The IP layers of connection between photosphere is to rely on the optical add/drop multiplexer in photosphere, i.e. IP Router in layer is accessed in photosphere by the optical add/drop multiplexer of photosphere.
In the network system of multitiered network, largely idle standby router adds the cost of network system.In addition, In multitiered network, the client layer on upper strata can't see the network topology and recovery capability of the service layer of lower floor, and service layer is not yet Understand dynamic processes of the client layer to data traffic；So traditional Restoration Mechanism is distinguished for client layer and service layer There is no information interchange between deployment Restoration Mechanism, and two layers of Restoration Mechanism, the Restoration Mechanism of no interlayer exchange is in network failure How co-ordination is also difficult point place.
For appearing in the failure problems on transmission route device, existing multitiered network fault recovery method can not be fine Ground is solved.
For example, in the first existing multitiered network fault recovery method, based on multitiered network structure, by obtaining in real time Fault message, using GMPLS, (Generalized Multiprotocol Label Switching, general multiple protocols mark is handed over Change agreement) signaling realizes the recovery of multitiered network.When breaking down, the initial layers of fault recovery are determined according to fault message, Inter-layer failure configured information, calling layer internal fault recovering step are sent to the layer；In calling layer during recovery routine, configuration starts this The delay timer of layer, the stand-by period exhausts whether rear failure judgement is recovered, if recovering to complete, sends layer internal fault and recovers Information and inter-layer failure recover information, indicate that recovery is completed；If recovery is not completed, into inter-layer failure Restoration stage, Inter-layer failure is passed into adjoining course using interlaminar signaling；This process is repeated until fault recovery completes to carry out Network Synchronization.
, it is necessary to based on multi-layer network system, be believed by obtaining failure in real time in scheme mentioned by above-mentioned first method Breath, coordinates the Restoration Mechanism of different interlayers using GMPLS signalings；But this scheme need based on GMPLS create one it is general Control plane sends interlaminar signaling to coordinate Restoration Mechanism, and the network system cost do not paid close attention in view of Virtual network operator is asked Topic, and setting time delay transmission signaling also increases the recovery time of network failure.
In existing second of multitiered network fault recovery method, recovery rate and timing are determined by dynamic, judge to recover Change of the rate within the t times come realize interlayer coordinate.Timer is set to 0 during starting, detected after server layer failure, starts clothes The recovering process of business layer；This recovery rate memory and last time recovery rate memory are now set, and counter is put 1；Each Certain time reads recovery rate memory and last time recovery rate memory and calculating difference；Difference is compared with preset value, if Less than preset value, then last time recovery rate memory is substituted with this recovery rate memory and repeat the above steps and counter plus 1； If greater than preset value, then the recovering process for stopping service layer triggering the recovering process of client layer；Until completing network recovery mistake Journey.This method utilizes recovery rate memory and last time recovery rate memory and preset difference value, completes extensive between multitiered network The process of multiple mechanism coordination.
In scheme mentioned by above-mentioned second method, recovery rate and timing are determined by dynamic, judge recovery rate in t In change come realize interlayer coordinate, although this scheme eliminates the demand for setting up general controls platform, but needs dynamic Recovery rate and reserved stand-by period are calculated, the recovery process of terminal node is extended, and is based only upon coordination Restoration Mechanism and is realized The recovery of multitiered network, does not account for the Cost Problems of network system yet.
On the basis of the either method embodiment provided in Fig. 4~6, the network system provided in the embodiment of the present invention Service layer's equipment that physical link is provided for client layer equipment can also be included, service layer's equipment includes：Multiple add-drop multiplexers； Obvious, the service that each router in network system is accessed in multitiered network by each self-corresponding add-drop multiplexer respectively Layer.
It should be noted that each router of client layer can be to that should have an add-drop multiplexer, each router leads to Cross itself corresponding add-drop multiplexer and be linked into service layer；For example, when router a is to router b data traffic transmittings, the road Data traffic is transmitted to by itself corresponding add-drop multiplexer c by device first, then add-drop multiplexer c forwards data traffic To the add-drop multiplexer d corresponding to router b, data traffic is finally transmitted to router b by add-drop multiplexer d.
In the case where network system also includes providing service layer's equipment of physical link for client layer equipment, the present invention is real That applies that example provided realizes that the method for network disaster recovery can also include with shared standby router：
The routing information of first routed path is sent to by the first couple in router after the first routed path is calculated Each first add-drop multiplexer that one routed path is passed through；
Other routers in above-mentioned first couple in router and the first routed path forward mesh according to the first routed path The step of marking data traffic, including：
Other routers in first couple in router and the first routed path according to the first routed path, by with it is respective Connected the first add-drop multiplexer forwarding target data flow；
Each first add-drop multiplexer utilizes each pre- between each self-corresponding router according to the first routed path The physical link forwarding target data flow first set up.
It is appreciated that the problem of causing network failure for the transmission route device failure that client layer occurs, once on State the first couple in router to calculate after the first routed path, not only need the routing information of the first routed path being sent to Other routers in one routed path, the routing information of the first routed path should also be sent provide the first via by path institute The router of process distinguishes corresponding add-drop multiplexer, is carried out with alloing above-mentioned target data flow to pass through service layer Transmission.
When therefore, the problem of the transmission route device failure occurred in client layer causes network failure, the present invention is implemented Example sends the routing information of the first routed path by the first couple in router to each first add-drop multiplexer, to realize network Information interchange in failover procedure between service layer and client layer, it is not necessary to can just be completed using service layer's Restoration Mechanism The recovery of network failure；And there is no information interchange in the prior art, between two-tier network, except client layer can calculate new route Outside path, service layer can also calculate once new routed path.
It is obvious, can be stored with the couple in router router of each in network system and each add-drop multiplexer Address information, so being easy to the add-drop multiplexer transmission above-mentioned first into network system according to the address information of add-drop multiplexer The routing information of routed path, reaches the purpose that the first routed path is informed to add-drop multiplexer.
It is emphasized that on the basis of the embodiment of the method shown in Fig. 6, the above method can also include：First The routing information in secondary route path is sent to secondary route path and passed through by couple in router after secondary route path is obtained Each second add-drop multiplexer crossed；
Other routers in above-mentioned first couple in router and secondary route path, mesh is forwarded according to secondary route path The step of marking data traffic, including：
Other routers in first couple in router and secondary route path according to secondary route path, by with it is respective Connected the second add-drop multiplexer forwarding target data flow；
Each second add-drop multiplexer utilizes each pre- between each self-corresponding router according to secondary route path The physical link forwarding target data flow first set up.
It is similar, it will be understood that to be obtained once above-mentioned first couple in router behind secondary route path, not only need the The routing information of two routed paths is sent to other routers in secondary route path, should also be by the road in secondary route path Footpath information sends corresponding second add-drop multiplexer of router difference for providing and being passed through in secondary route path, to cause on hereafter State target data flow and can pass through service layer and be transmitted.
Below, the Advantageous Effects brought for each embodiment of the invention described above are described in detail.
The cost of network system refers to use in equipment and the infusion of financial resources needed when building a network, network system The router quantity arrived can as the principal element for weighing cost, network system cost and router quantity positive correlation, with The increase of the router quantity used in network system, the cost of network system can also increase.Prior art is contrasted, in network system In system in the case of the quantity with identical traffic router, in the scheme that various embodiments of the present invention are provided, alternate routing is shared The quantity of device is few, the low cost of network system.In addition, in multitiered network, due to sharing standby router number in network system The reduction of amount, for connecting, shared standby router is also corresponding to the quantity of the add-drop multiplexer of service layer to be reduced, network system Cost further reduce.
Network availability be for weighing the ability that network can normally provide service, in various embodiments of the present invention, net Network availability represents the first transmission route device after a failure, and above-mentioned mesh can be replaced with a newly-built communication link in network system Mark the ability of communication link.
It is appreciated that in various embodiments of the present invention, when the quantity for sharing standby router is no less than two, in network system Each shared standby router can be used to set up new communication link to replace above-mentioned destination communications link；And relative to Prior art, for any one couple in router, the standby router that only has in network system can be used to set up New communication link come replace failure communication link, as long as the corresponding standby router of transmission route device all fails, just New communication link can not be set up to replace the communication link of failure；It is apparent that various embodiments of the present invention are relative to existing skill Art, network availability is higher.
MTTR, Chinese is referred to as the time before average repair, and characterizes from the time required for network failure to network recovery, In embodiments of the present invention, for transmission route device break down caused by network failure problem, from network failure to Time required for network recovery is mainly the calculating process of above-mentioned first routed path and is sent to the first routed path The time that other nodes that first routed path is passed through are consumed, it will be understood that the calculating process of the first routed path and Time needed for transmission process is short, and the MTTR of the embodiment of the present invention is small, i.e., the embodiment of the present invention can realize the fast of network failure Quick-recovery.
As seen from the above, prior art is contrasted, scheme provided in an embodiment of the present invention can ensure that transmission route device fails The automatic recovery of network failure afterwards, and in network system share standby router quantity it is few, so whole network system into This is low；Further, since during the failure of transmission route device, any one shared standby router can replace the transmission route of failure Device, so the recovery of network failure can not be just only completed when all shared standby routers are unavailable, therefore, when altogether When enjoying the quantity at least two of standby router, the network availability of network system in the scheme that the embodiment of the present invention is provided It is high；In addition, in scheme provided in an embodiment of the present invention, be mainly from the time required for network failure to network recovery on State the calculating process of the first routed path and the routing information of the first routed path is sent to its in the first routed path The time that his router is consumed, and the time needed for the calculating process of the first routed path and the transmission process of routing information It is short, therefore the scheme of the embodiment of the present invention can realize the fast quick-recovery of network failure.
The embodiment of the present invention is simply introduced below by an instantiation.
Assuming that network system is applied to IP over WDM nets, as shown in fig. 7, network system includes 4 interconnection routers TR1~TR4,6 transmission route device TR5-TR10, above-mentioned 10 routers are to be operated in IP layers of router, this network system Included couple in router and the optical add/drop multiplexer of the corresponding service layer of each router are not shown in figure.If adopted Take prior art, then its quantity for transmitting class router is 12 altogether, wherein, transmission class router include transmission route device with Shared standby router；And when using the scheme of the embodiment of the present invention, because the flow of IP layers of transmission accounts for the ratio of network total flow Example is 80%, so in the case where there is 6 transmission route devices, 2 shared standby routers should be at least used, so in this reality Can be with 2~5 shared standby routers of option and installment in example.
During using 2 shared standby routers, the quantity of transmission class router is reduced to 8 by 12, wherein 6 are to pass Defeated router, 2 are shared standby routers, for 12 transmission class routers that art methods need, net The cost of road framework is significantly reduced, and the saving of transmission class router, which can reach that 33.3%, Fig. 8 is illustrated, to be made The saving for the transmission class router that can be obtained during with the shared standby router of varying number, wherein, Fig. 8 abscissa is The quantity of shared standby router, ordinate is the saving of above-mentioned transmission class router.
It is appreciated that when the quantity of shared standby router is no less than two, standby road is each shared in network system By device can be used to set up new communication link to replace the communication link of above-mentioned failure, therefore, the availability of network system It is high.
Assume to be configured with three shared standby router a~c in network system in this example, wherein, router TR1 is Above-mentioned first interconnection router, router TR5 is above-mentioned first transmission route device.When router TR5 breaks down, first connects Enter router and perceive above-mentioned router TR5 failures, the first couple in router first determines whether three shared standby router a It whether there is the shared standby router that same network segment is in router TR5 in~c；First access router discovery shares standby The network segment residing for router b is identical with the network segment residing for router TR5, then shared standby router b now is defined as into target Shared standby router.
Then the first couple in router shares standby router using target and shares standby as intermediate path node, and based on target With the address information of router, the Work route path between the first couple in router and router TR1 is calculated, the first via is used as By path.
The routing information of first routed path is sent in addition to itself by the first couple in router, and the first routed path is passed through Each router in the router crossed, and the first routed path distinguishes corresponding optical add/drop multiplexer；The first via is by road Footpath by router and after each self-corresponding optical add/drop multiplexer obtains the routing information of first routed path, just Above-mentioned target data flow can be forwarded according to the first routed path, therefore between the first couple in router and router TR1, The router and optical add/drop multiplexer passed through by the first routed path sets up a new communication link, instead of above-mentioned Destination communications link, completes the recovery of network failure.
The embodiment of the method shown corresponding to Fig. 4, the embodiment of the present invention additionally provides a kind of network system, as shown in figure 3, institute Network system is stated including client layer equipment, the client layer equipment, including：Couple in router, interconnection router, connect to connect Enter router and multiple transmission route devices of interconnection router and at least one shared standby router；
The total quantity that standby router is shared in the network system is less than the quantity of the transmission route device, each access Be stored with the address information of each shared standby router in router；
Wherein, the first couple in router, as any couple in router in the client layer equipment, when perceive and its When first transmission route device of connection breaks down, determined from each shared standby router to replace described first to transmit The target of router shares standby router；Standby router is shared as intermediate path node using the target, and based on target Between the address information of shared standby router, the first corresponding interconnection router of calculating first couple in router Work route path, is used as the first routed path；By the routing information of first routed path be sent to the first via by Other routers in path；
Other routers in first couple in router and first routed path, according to the first via by road Footpath forwards target data flow, the target data flow be first couple in router and first interconnection router it Between need the data traffic that is forwarded by the first transmission route device.
The embodiment of the method shown corresponding to Fig. 5, specifically, the network segment residing for any one shared standby router with it is described The network segment residing for a transmission route device in client layer equipment is identical；
First couple in router, when perceiving connected first transmission route device and breaking down, judgement is It is no to there is the shared standby router that same network segment is in the first transmission route device；If it does, determining to replace State the first transmission route device target share standby router be：The shared standby of same network segment is in the first transmission route device Use router；If it does not, determining that the shared standby router of target to replacement the first transmission route device is：It is residing The network segment and the closest standby router of the network segment residing for the first transmission route device.
The embodiment of the method shown corresponding to Fig. 6, specifically, the first transmission route device, after faults itself reparation, to First couple in router, which is sent, repairs successful information；
First couple in router, after the reparation successful information is received, is obtained with first transmission route Device is intermediate path node, and the Work route path between first couple in router and first interconnection router is made For secondary route path；The routing information in the secondary route path is sent to other routes in the secondary route path Device；
Other routers in first couple in router and the secondary route path, according to the secondary route road Footpath forwards the target data flow.
Specifically, first couple in router, after the reparation successful information is received, calculates and is passed with described first Defeated router is intermediate path node, the Work route road between first couple in router and first interconnection router Footpath, is used as secondary route path.
Specifically, first couple in router, after the reparation successful information is received, is carried from target database Take out using the first transmission route device as intermediate path node, first couple in router and first interconnection router Between Work route path, be used as secondary route path；
Wherein, in the target database there be in transmission route device normal work record, couple in router and mutual link By the Work route path between device.
Specifically, the network system also includes：Service layer's equipment of physical link, institute are provided for the client layer equipment Stating service layer's equipment includes：Multiple add-drop multiplexers.For rough schematic view, as shown in figure 9, the only access of displaying first route Device, the first transmission route device, the first interconnection router and target share the annexation between standby router.
First couple in router, after first routed path is calculated, by the road of first routed path Footpath information is sent to each first add-drop multiplexer that the first routed path is passed through；
Each described first add-drop multiplexer, according to first routed path, and using each with each self-corresponding road The target data flow is forwarded by the physical link pre-established between device.
As seen from the above, prior art is contrasted, scheme provided in an embodiment of the present invention can ensure that transmission route device fails The automatic recovery of network failure afterwards, and in network system share standby router quantity it is few, so whole network system into This is low；Further, since during the failure of transmission route device, any one shared standby router can replace the transmission route of failure Device, so the recovery of network failure can not be just only completed when all shared standby routers are unavailable, therefore, when altogether When enjoying the quantity at least two of standby router, the network availability of network system in the scheme that the embodiment of the present invention is provided It is high；In addition, in scheme provided in an embodiment of the present invention, be mainly from the time required for network failure to network recovery on State the calculating process of the first routed path and the routing information of the first routed path is sent to its in the first routed path The time that his router is consumed, and the time needed for the calculating process of the first routed path and the transmission process of routing information It is short, therefore the scheme of the embodiment of the present invention can realize the fast quick-recovery of network failure.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality Body or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or deposited between operating In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to Nonexcludability is included, so that process, method, article or equipment including a series of key elements not only will including those Element, but also other key elements including being not expressly set out, or also include being this process, method, article or equipment Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that Also there is other identical element in process, method, article or equipment including the key element.
Each embodiment in this specification is described by the way of related, identical similar portion between each embodiment Divide mutually referring to what each embodiment was stressed is the difference with other embodiment.It is real especially for system Apply for example, because it is substantially similar to embodiment of the method, so description is fairly simple, related part is referring to embodiment of the method Part explanation.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the scope of the present invention.It is all Any modifications, equivalent substitutions and improvements made within the spirit and principles in the present invention etc., are all contained in protection scope of the present invention It is interior.

Claims (10)

1. a kind of network system, it is characterised in that the network system includes client layer equipment, the client layer equipment, including： Couple in router, interconnection router, multiple transmission route devices to connect couple in router and interconnection router and at least One shared standby router；
The total quantity that standby router is shared in the network system is less than the quantity of the transmission route device, each access route Be stored with the address information of each shared standby router in device；
Wherein, the first couple in router, as any couple in router in the client layer equipment, is connected thereto when perceiving The first transmission route device when breaking down, determined from each shared standby router to replace first transmission route The target of device shares standby router；Standby router is shared as intermediate path node using the target, and it is shared based on target The address information of standby router, calculates the work between the first corresponding interconnection router of first couple in router Routed path, is used as the first routed path；The routing information of first routed path is sent to first routed path In other routers；
Other routers in first couple in router and first routed path, turn according to first routed path Target data flow is sent out, the target data flow is to be needed between first couple in router and first interconnection router The data traffic to be forwarded by the first transmission route device.
2. network system according to claim 1, it is characterised in that
The network segment residing for any one shared standby router and a transmission route device institute in the client layer equipment The network segment at place is identical；
First couple in router, when perceiving connected first transmission route device and breaking down, judges whether to deposit The shared standby router of same network segment is being in the first transmission route device；If it does, determining to replace described the The target of one transmission route device shares standby router：The shared standby road of same network segment is in the first transmission route device By device；If it does not, determining that the shared standby router of target to replacement the first transmission route device is：The residing network segment The closest standby router with the network segment residing for the first transmission route device.
3. network system according to claim 1, it is characterised in that
The first transmission route device, after faults itself reparation, sends to first couple in router and repairs successful information；
First couple in router, receive it is described reparation successful information after, obtain using the first transmission route device as Intermediate path node, the Work route path between first couple in router and first interconnection router is used as Two routed paths；The routing information in the secondary route path is sent to other routers in the secondary route path；
Other routers in first couple in router and the secondary route path, turn according to the secondary route path Send out target data flow described.
4. the network system according to any one of claims 1 to 3, it is characterised in that：The network system also includes：For institute Service layer's equipment that client layer equipment provides physical link is stated, service layer's equipment includes：Multiple add-drop multiplexers；
First couple in router, after first routed path is calculated, the path of first routed path is believed Breath is sent to each first add-drop multiplexer that the first routed path is passed through；
Each described first add-drop multiplexer, according to first routed path, and using each with each self-corresponding router Between the physical link that pre-establishes forward the target data flow.
5. a kind of method for realizing network disaster recovery with shared standby router, it is characterised in that methods described is applied to power Profit requires the network system described in 1~4 any one, and methods described includes：
When first couple in router perceives connected first transmission route device and broken down, from each shared alternate routing Determined in device to replace the target of the first transmission route device to share standby router；
First couple in router shares standby router using the target and shares standby as intermediate path node, and based on target With the address information of router, the working ways between the first corresponding interconnection router of first couple in router are calculated By path, the first routed path is used as；
The routing information of first routed path is sent in first routed path by first couple in router Other routers；
Other routers in first couple in router and first routed path turn according to first routed path Send out target data flow；Wherein, the target data flow is first couple in router and first interconnection router Between need the data traffic that is forwarded by the first transmission route device.
6. method according to claim 5, it is characterised in that
The network segment residing for any one shared standby router and a transmission route device institute in the client layer equipment The network segment at place is identical；
It is shared standby from each when first couple in router perceives connected first transmission route device and broken down The step of target to replacement the first transmission route device shares standby router is determined in router, including：
When first couple in router perceives connected first transmission route device and broken down, judge whether with The first transmission route device is in the shared standby router of same network segment；
If it does, determining that the shared standby router of target to replacement the first transmission route device is：With described first Transmission route device is in the shared standby router of same network segment；
If it does not, determining that the shared standby router of target to replacement the first transmission route device is：The residing network segment The closest standby router with the network segment residing for the first transmission route device.
7. method according to claim 5, it is characterised in that
Other routers in first couple in router and first routed path are according to first routed path After the step of forwarding target data flow, methods described also includes：
First couple in router is obtained with described after the reparation successful information transmitted by the first transmission route device is received First transmission route device is intermediate path node, the work between first couple in router and first interconnection router Routed path, is used as secondary route path；
The routing information in the secondary route path is sent in the secondary route path by first couple in router Other routers；
Other routers in first couple in router and the secondary route path, turn according to the secondary route path Send out target data flow described.
8. the method according to right wants 7, it is characterised in that
First couple in router is obtained with described after the reparation successful information transmitted by the first transmission route device is received First transmission route device is intermediate path node, the work between first couple in router and first interconnection router Routed path, the step of as secondary route path, including：
First couple in router is calculated using the first transmission route device in after the reparation successful information is received Between path node, the Work route path between first couple in router and first interconnection router is used as second Routed path.
9. method according to claim 7, it is characterised in that first couple in router is receiving the first transmission road After the reparation successful information transmitted by device, obtain using the first transmission route device as intermediate path node, described first connects Enter the Work route path between router and first interconnection router, the step of as secondary route path, including：
First couple in router is extracted with described the after the reparation successful information is received from target database One transmission route device is intermediate path node, the working ways between first couple in router and first interconnection router By path, secondary route path is used as；
Wherein, in the target database there be in transmission route device normal work record, couple in router and interconnection router Between Work route path.
10. the method according to any one of claim 5~9, it is characterised in that：The network system also includes：To be described Client layer equipment provides service layer's equipment of physical link, and service layer's equipment includes：Multiple add-drop multiplexers；Methods described Also include：
First couple in router is after first routed path is calculated, by the routing information of first routed path It is sent to each first add-drop multiplexer that the first routed path is passed through；
Other routers in first couple in router and first routed path turn according to first routed path The step of sending out target data flow, including：
Other routers in first couple in router and first routed path lead to according to first routed path Cross the first add-drop multiplexer with being each connected and forward target data flow；
Each described first add-drop multiplexer according to first routed path, and using each with each self-corresponding router it Between the physical link that pre-establishes forward the target data flow.
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