CN101626317A - Method, system and device for link failure recovery - Google Patents
Method, system and device for link failure recovery Download PDFInfo
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- CN101626317A CN101626317A CN200810127676A CN200810127676A CN101626317A CN 101626317 A CN101626317 A CN 101626317A CN 200810127676 A CN200810127676 A CN 200810127676A CN 200810127676 A CN200810127676 A CN 200810127676A CN 101626317 A CN101626317 A CN 101626317A
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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
- H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
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Abstract
The embodiment of the invention discloses a method, a system and a device for link failure recovery. The method comprises the following steps of: starting a timer when a network failure is detected; receiving failure information reported by a node of which a failure type is detected; acquiring the failure type from the failure information; closing the timer if the time does not exceed a predetermined time of the timer and the failure type is an IP layer failure; and switching an IP layer link with the failure to an IP layer protection link. Correspondingly, the embodiment of the invention also discloses a system and a device for the link failure recovery. The method, system and device provided by the embodiment of the invention can close the timer during failure information analysis for acquiring information indicating that the IP layer has a failure, and switch the IP layer link with the failure to the IP layer protection link, and shorten the time for IP layer failure recovery.
Description
Technical field
The present invention relates to field of network communication, relate in particular to a kind of mthods, systems and devices of link failure recovery.
Background technology
In existing multitiered network; network failure may occur in IP layer or transport layer; so all have corresponding techniques to realize protection at IP and transport layer usually; as can use the quick heavy-route MPLS FRR of multiprotocol label switching technology at the IP layer, transport layer can use 1+1 protection technology, 1:1 resist technology or share protect technology.
When IP layer fault took place network, router can detect this fault and protection fast; When network generation transport layer fault, router and light device can detect this fault usually, and start protection Restoration Mechanism separately respectively.Because it is close that the two starts guard time, when router when the link switchover of fault is to the protection link, it is also successful that photosphere recovers, promptly the former link of fault is repaired, and can switch back former link again.At this moment router has been done useless work, and also may cause route flapping.
For fear of this situation, prior art has been introduced timer (hold-off timer, normally 50ms), when router detection is provided with timer during to fault, waits for that in the given time photosphere takes safeguard measure earlier, and router does not deal with.In the wait process, whether router still exists by machine-processed failure judgement such as two-way forwarding detection BFD, if transport layer has recovered to finish, router timeing closing device recovers normal operating conditions so; If surpass the timer preset time, router detection failure still exists, and starts the protection Restoration Mechanism of IP layer immediately.
The inventor finds that there is following problem at least in prior art in realizing process of the present invention:
When network failure was IP layer fault, router was provided with timer and waits for always, can prolong the recovery time of IP layer fault.
Summary of the invention
For addressing the above problem, the embodiment of the invention provides a kind of mthods, systems and devices of link failure recovery, and when overcoming network and IP layer fault occurring, router is provided with timer and waits for always, the defective that can prolong the recovery time of IP layer fault.
The embodiment of the invention provides a kind of method of link failure recovery, comprising: when detecting network failure, start timer; Receive the fault message that the node detected fault type reports; From above-mentioned fault message, obtain above-mentioned fault type; If not surpassing above-mentioned timer preset time and above-mentioned fault type is IP layer fault, close above-mentioned timer, be IP layer protection link with the IP layer link switchover of fault.
Correspondingly, the embodiment of the invention also provides a kind of device of link failure recovery, comprising: detection module is used to detect network failure; Start module, be used for when detection module detects network failure, start timer; Receiver module is used to receive the fault message that the node that detected fault type reports; Parsing module is used for obtaining fault type from the fault message that receiver module receives; Protection module is used for when not surpassing above-mentioned timer preset time and fault type and be IP layer fault, and the timeing closing device is an IP layer protection link with the IP layer link switchover of fault.
Correspondingly, the embodiment of the invention also provides a kind of system of link failure recovery, comprising: first node and Section Point; Wherein,
First node is used for when detecting network failure, reports the fault message that carries fault type to Section Point;
Section Point is used for when detecting network failure, starts timer; Receive the fault message that first node reports; From fault message, obtain fault type; When not surpassing above-mentioned timer preset time and fault type and be IP layer fault, the timeing closing device is an IP layer protection link with the IP layer link switchover of fault.
Compared with prior art; the embodiment of the invention is by when detecting network failure; start timer; resolve the fault message that has fault type that downstream node sends, and obtain fault type, when not surpassing above-mentioned timer preset time and fault type and be IP layer fault; timeing closing device and be IP layer protection link immediately with the IP layer link switchover of fault; thereby accelerate fault recovery speed greatly, shorten the recovery time of fault, avoid useless wait.
Description of drawings
Fig. 1 is the application scenarios schematic diagram of the embodiment of the invention;
Fig. 2 is the method flow diagram of link failure recovery in the embodiment of the invention;
Fig. 3 is the method flow diagram that first node is carried out link failure recovery in the embodiment of the invention;
Fig. 4 is the method flow diagram that middle protection node is carried out link failure recovery in the embodiment of the invention;
Fig. 5 is to be the schematic diagram of IP layer temporary protection link with the IP layer link switchover of fault in the embodiment of the invention;
Fig. 6 is the schematic diagram that first node R 1 rebulids link in the embodiment of the invention;
Fig. 7 is the method flow diagram of link failure recovery in further embodiment of this invention;
Fig. 8 is the device schematic diagram of link failure recovery in the embodiment of the invention;
Fig. 9 is the system schematic of link failure recovery in the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described.
As shown in Figure 1, be the schematic diagram of the application scenarios of the embodiment of the invention.Node R 1, R2, R3, R4 are router, and node N1, N2, N3, N4 are optical nodes.Adopt POS (Packet of SDH, SDH wrapper) or OTN (OpticalTransport Network, optical transfer network) interface to connect between R1 and N1, R2 and N2, R3 and N3, R4 and the N4.Chain route optical node N1 between router R1 and the R2 and LSP (the Lable Switch Path between the N2, label switched path) carrying, chain route optical node N2 between router R2 and the R3 and the carrying of the LSP between the N3, chain route optical node N3 between router R3 and the R4 and the carrying of the LSP between the N4.Set up a LSP between router R1 to R4, the path is R1-R2-R3-R4.Wherein, the LSP between node R 3 and the node R 4 breaks down.
As shown in Figure 2, the method flow diagram for link failure recovery in the embodiment of the invention comprises:
Step S201, when detecting network failure, start timer;
Concrete, can be first node (as the R1 among Fig. 1) when detecting network failure, start timer.First node can only detect this fault, but can not determine that this fault belongs to IP layer or transport layer.
Step S202, receive the fault message that the node detected fault type reports;
Concrete, first node (as the R1 among Fig. 1) (as the R3 among Fig. 1) to downstream node sends the information of carrying flag bit, and this flag bit is used to indicate downstream node when detecting network failure, reports fault type.Downstream node can detect this fault and occur in IP layer or transport layer.The downstream node transmission is carried the fault message of fault type to first node, and wherein, fault type is used to indicate the network failure of generation to belong to IP layer fault or transport layer fault.
Step S203, from above-mentioned fault message, obtain above-mentioned fault type;
Concrete, first node is by resolving the fault message that downstream node reports, and the network failure that gets access to generation belongs to IP layer fault or transport layer fault.
If step S204 does not surpass above-mentioned timer preset time and above-mentioned fault type is an IP layer fault, the timeing closing device is an IP layer protection link with the IP layer link switchover of fault.
Concrete, be IP layer fault if do not surpass above-mentioned timer preset time and above-mentioned fault type, first node timeing closing device is an IP layer protection link with the IP layer link switchover of fault.
Said method also comprises:
If not surpassing above-mentioned timer preset time and fault type is the transport layer fault, then waiting timer is overtime.
If surpass above-mentioned timer preset time, detect network failure and whether still exist; If exist, be IP layer protection link with the IP layer link switchover of fault; If there is no, illustrate the transport layer fault is recovered.Said method also can be that the centre protects node (as the R2 among Fig. 1) when detecting network failure, starts timer; Downstream node sends fault message to the centre of carrying fault type and protects node; Middle protection node is by resolve fault information, and the network failure that gets access to generation belongs to IP layer fault or transport layer fault; If not surpassing above-mentioned timer preset time and above-mentioned fault type is IP layer fault, middle protection node timeing closing device is an IP layer temporary protection link with the IP layer link switchover of fault.
Pass through above-mentioned steps; when not surpassing the timer preset time; if the fault type that obtains is an IP layer fault; direct timeing closing device; and be IP layer protection link with the IP layer link switchover of fault; can accelerate fault recovery speed greatly like this, shorten recovery time, avoid useless wait.
As shown in Figure 3, node is carried out the method flow diagram of link failure recovery headed by.With the scene among Fig. 1 is that example describes, node headed by the R1, and when the LSP between node R 3 and the node R 4 broke down, the detailed process of link failure recovery was as follows, comprising:
Step S301, when setting up the path, first node R 1 sends Path information to downstream node;
Concrete, in first node R 1 to setting up a LSP between the node R 4, first node R 1 is initiated path message to next node R 2, next node R2 sends to next node R3 after this path message is handled, by that analogy, send to the approach node of the ERO that Path message carries (Explicit Route Object, destination path indication) appointment one by one.By RSVP-TE (based on the RSVP of traffic engineering expansion) agreement is expanded, when sending Path information to downstream node, in the heading of the session attribute Object of this information, increase by a flag bit, when being used to indicate downstream node to detect fault, upstream reports this flag bit fault type, as IP layer fault or transport layer fault.That is to say, after downstream node receives this information,, need send the fault message that comprises fault type to first node if detect fault type.
When step S302, first node R 1 detect LSP and break down, start timer;
Concrete, first node R 1 detects by BFD and breaks down, but can not determine the type of this fault, and promptly this fault belongs to IP layer or transport layer.At this moment, first node R 1 starts timer.
Step S303, node R 3 are by detecting the type of determining fault; Concrete, downstream node R3 can determine that by POS and OTN interfacing fault occurs in IP layer or transport layer.
Step S304, node R 3 send fault message, indication fault type; Concrete, downstream node R3 carries fault type in the fault message that sends, be used to identify the type of fault, as IP layer fault or transport layer fault.Downstream node R3 can directly send this fault message to first node R 1, also can send this fault message by upstream nodes R2, sends this fault message by node R 2 to first node R 1.
Step S305, first node R 1 resolve fault information are obtained fault type; Step S306, first node R 1 detect timer and whether surpass preset time, if do not surpass execution in step S307; If surpassed execution in step S310;
Step S307, judge whether the fault type that first node R 1 is obtained is IP layer fault;
If, execution in step S308; If not, promptly this fault type is the transport layer fault, execution in step S309.
Step S308, first node R 1 timeing closing device are IP layer protection link with the IP layer link switchover of fault, and at this moment, flow process finishes;
Step S309, waiting timer surpass preset time, change step S306;
Whether step S310, first node R 1 detection failure still exist, if there is execution in step S311; If there is no, then do not carry out any operation;
Step S311, first node R 1 are IP layer protection link with the IP layer link switchover of fault, and at this moment, flow process finishes.According to above-mentioned steps; first node detection is to fault and start timer; after receiving the fault message that downstream node reports; obtain fault type by resolving this fault message; when belonging to the IP layer, fault can shift to an earlier date the timeing closing device; starting IP layer protection mechanism immediately, is IP layer protection link with the IP layer link switchover of fault, has shortened the time of fault recovery.
As shown in Figure 4, carry out the method flow diagram of link failure recovery for centre protection node.With the scene among Fig. 1 is that example describes, and node R 2 is as middle protection node, and when breaking down between node R 3 and the node R 4, the detailed process of link failure recovery is as follows, comprising:
When step S401, node R 2 detect LSP and break down, start timer;
Concrete, node R 2 detects by BFD and breaks down, but can not determine the type of this fault, and promptly this fault belongs to IP layer or transport layer.At this moment, node R 2 starts timer, and priority scheduling treats that transport layer recovers.
After step S402, node R 3 detect fault type, report fault message to node R 2;
Step S403, node R 2 are resolved the fault message that receives, and obtain fault type;
Step S404, node R 2 detect timer and whether surpass preset time, if do not surpass execution in step S405; If surpass execution in step S410;
Whether the fault type that protection node R 2 is obtained in the middle of step S405, the judgement is IP layer fault; If fault type is an IP layer fault, execution in step S406; If fault type is not an IP layer fault, promptly fault type is the transport layer fault, execution in step S409;
Step S406, node R 2 timeing closing devices are IP layer temporary protection link with the IP layer link switchover of fault;
As shown in Figure 5, this IP layer temporary protection link is the temporary link between node R 2 and the node R 4, and promptly path change is a node R 2-node R 5-node R 4.
Step S407, node R 2 are notified first node R 1, and the IP layer between node R 3 and the node R 4 breaks down;
Step S408, first node R 1 start Restoration Mechanism, reselect new route and set up link, and at this moment, flow process finishes;
As shown in Figure 6, the route that first node R 1 is selected without faulty link rebulids link, and new link is: first node R 1-node R 6-node R 4.
Step S409, waiting timer surpass preset time, change step S404;
Whether step S410, node R 2 detection failure still exist, if there is execution in step S411; If there is no, then do not carry out any operation;
Step S411, node R 2 are IP layer temporary protection link with the IP layer link switchover of fault, change step S407 then.Middle protection node gets access to after the IP layer breaks down, timeing closing device and be IP layer protection link with the IP layer link switchover of fault, before first node starts Restoration Mechanism and repairs former link, can be temporary transient between the node that breaks down carry out information interaction.
Further embodiment of this invention provides a kind of method of link failure recovery; first node R 1 is as the protection point; break down between node R 3 and the node R 4; first node R 1 does not also detect when breaking down; just received the fault message that downstream node reports; processing procedure under this scene as shown in Figure 7, comprising:
After step S701, node R 3 detected fault type, upstream nodes reported fault message;
Node R 3 can directly send this fault message to first node R 1, also can send this fault message by upstream nodes R2, sends this fault message by node R 2 to first node R 1.
After step S702, first node R 1 receive this fault message, continue link is detected;
Concrete, after first node R 1 receives this fault message, do not resolve this fault message, but link is proceeded to detect.
After step S703, first node R 1 detect link occurs fault, start timer;
Step S704, first node R 1 resolve fault information, when breaking down for the IP layer as if fault type, the timeing closing device is protected link with the IP layer link switchover of fault for the IP layer, reselects new route and sets up the path.
The protection point wouldn't be resolved the fault message that reports; after detecting fault, start timer and resolve fault information, when being the IP layer as if fault; timeing closing device and be IP layer protection link with the IP layer link switchover of fault shortens the time of fault recovery significantly.The embodiment of the invention provides a kind of device of link failure recovery, as shown in Figure 8, comprising:
Parsing module 804 is used for obtaining fault type from the fault message that receiver module 803 receives;
This device also comprises: sending module 806, be used for sending the information that comprises flag bit to above-mentioned node, and this flag bit is used to indicate above-mentioned node when detecting network failure, reports fault type.
Above-mentioned protection module 805 also is used for when not surpassing above-mentioned timer preset time and fault type and be the transport layer fault, and waiting timer is overtime.
Above-mentioned protection module 805 also is used for when surpassing above-mentioned timer preset time and detection module and detect network failure, is IP layer protection link with the IP layer link switchover of fault.
The device that the embodiment of the invention provides obtains fault type by the fault message that parsing reports, and when fault type was IP layer fault, the timeing closing device was also handled accordingly, can shorten the time of fault recovery thus when the IP layer breaks down.
The embodiment of the invention also provides a kind of system of link failure recovery, as shown in Figure 9, comprising: first node 901 and Section Point 902; Wherein,
Above-mentioned Section Point 902 comprises: detection module 9021 is used to detect network failure; Start module 9022, be used for when detection module 9021 detects network failure, start timer; Receiver module 9023 is used to receive the fault message that carries fault type that first node 901 reports; Parsing module 9024 is used for obtaining fault type from the fault message that receiver module 9023 receives; Protection module 9025 is used for when not surpassing above-mentioned timer preset time and fault type and be IP layer fault, and the timeing closing device is an IP layer protection link with the IP layer link switchover of fault.
Above-mentioned Section Point 902 also comprises: sending module 9026, be used for sending the information that comprises flag bit to first node 901, and this flag bit is used to indicate first node 901 when detecting network failure, reports fault type.
Above-mentioned protection module 9025 also is used for when not surpassing above-mentioned timer preset time and fault type and be the transport layer fault, and waiting timer is overtime.
Above-mentioned protection module 9025 also is used for when surpassing above-mentioned timer preset time and detection module and detect network failure, is IP layer protection link with the IP layer link switchover of fault.
The mthods, systems and devices that provide by the embodiment of the invention; when detecting network failure; start timer; resolve the fault message that has fault type that downstream node sends, and obtain fault type, when not surpassing above-mentioned timer preset time and fault type and be IP layer fault; timeing closing device and be IP layer protection link immediately with the IP layer link switchover of fault; thereby accelerate fault recovery speed greatly, shorten the recovery time of fault, avoid useless wait.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.
Claims (10)
1, a kind of method of link failure recovery is characterized in that, comprising:
When detecting network failure, start timer;
Receive the fault message that the node detected fault type reports;
From described fault message, obtain described fault type;
If not surpassing described timer preset time and described fault type is IP layer fault, close described timer, be IP layer protection link with the IP layer link switchover of fault.
2, the method for claim 1 is characterized in that, the fault message that described node reports is to report according to its information of carrying flag bit that receives, and wherein said flag bit is used to indicate described node to report fault type when detecting network failure.
3, the method for claim 1 is characterized in that, also comprises:
If not surpassing described timer preset time and described fault type is the transport layer fault, wait for described timer expiry.
4, as claim 1 or 3 described methods, it is characterized in that, also comprise:
If surpass described timer preset time, detect described network failure and whether still exist;
If exist, be IP layer protection link with the IP layer link switchover of fault.
5, a kind of device of link failure recovery is characterized in that, comprising:
Detection module is used to detect network failure;
Start module, be used for when described detection module detects network failure, start timer;
Receiver module is used to receive the fault message that the node that detected fault type reports;
Parsing module is used for obtaining described fault type from the fault message that described receiver module receives;
Protection module is used for closing described timer when not surpassing described timer preset time and described fault type and be IP layer fault, is IP layer protection link with the IP layer link switchover of fault.
6, device as claimed in claim 5 is characterized in that, also comprises:
Sending module is used for sending the information of carrying flag bit to described node, and described flag bit is used to indicate described node when detecting network failure, reports fault type.
7, device as claimed in claim 5 is characterized in that, described protection module also is used for waiting for described timer expiry when not surpassing described timer preset time and described fault type and be the transport layer fault.
As claim 5 or 7 described devices, it is characterized in that 8, described protection module also is used for when surpassing described timer preset time and described detection module and detect network failure, is IP layer protection link with the IP layer link switchover of fault.
9, a kind of system of link failure recovery is characterized in that, comprising: first node and Section Point; Wherein,
Described first node is used for when detecting network failure, reports the fault message that carries fault type to described Section Point;
Described Section Point is used for when detecting network failure, starts timer; Receive the fault message that described first node reports; From described fault message, obtain described fault type; When not surpassing described timer preset time and described fault type and be IP layer fault, close described timer, be IP layer protection link with the IP layer link switchover of fault.
10, system as claimed in claim 9 is characterized in that, described Section Point comprises:
Detection module is used to detect network failure;
Start module, be used for when described detection module detects network failure, start timer;
Receiver module is used to receive the fault message that described first node reports;
Parsing module is used for obtaining described fault type from described fault message;
Protection module is used for closing described timer when not surpassing described timer preset time and described fault type and be IP layer fault, is IP layer protection link with the IP layer link switchover of fault.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810127676A CN101626317A (en) | 2008-07-07 | 2008-07-07 | Method, system and device for link failure recovery |
| PCT/CN2009/070482 WO2010003323A1 (en) | 2008-07-07 | 2009-02-20 | Method system and device for recovering link failure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810127676A CN101626317A (en) | 2008-07-07 | 2008-07-07 | Method, system and device for link failure recovery |
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| CN101626317A true CN101626317A (en) | 2010-01-13 |
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| CN200810127676A Pending CN101626317A (en) | 2008-07-07 | 2008-07-07 | Method, system and device for link failure recovery |
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| WO (1) | WO2010003323A1 (en) |
Cited By (8)
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| CN101877659A (en) * | 2010-06-30 | 2010-11-03 | 中兴通讯股份有限公司 | Method, device and system for monitoring packet loss |
| CN105045674A (en) * | 2015-09-15 | 2015-11-11 | 浪潮(北京)电子信息产业有限公司 | Link switching method and system |
| CN106357529A (en) * | 2015-07-21 | 2017-01-25 | 中国移动通信集团公司 | Method, device and system for protecting services in multilayer network |
| WO2017012431A1 (en) * | 2015-07-21 | 2017-01-26 | 中国移动通信集团公司 | Service protection method, device, and system in multi-layer network |
| CN106685682A (en) * | 2015-11-10 | 2017-05-17 | 中国移动通信集团公司 | Fault processing method, network device and system |
| CN110661705A (en) * | 2019-09-29 | 2020-01-07 | 北京物芯科技有限责任公司 | Hardware network switching engine and network fault processing system and method |
| WO2020043075A1 (en) * | 2018-08-30 | 2020-03-05 | 华为技术有限公司 | Method for recovering faulty multi-layer link and controller |
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| US20020063916A1 (en) * | 2000-07-20 | 2002-05-30 | Chiu Angela L. | Joint IP/optical layer restoration after a router failure |
| CN1284329C (en) * | 2002-12-30 | 2006-11-08 | 北京邮电大学 | Method for multilayer network to recover from |
| WO2006133601A1 (en) * | 2005-06-16 | 2006-12-21 | Zte Corporation | A method for transferring the information which is reported by the device initiatively |
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- 2009-02-20 WO PCT/CN2009/070482 patent/WO2010003323A1/en active Application Filing
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| CN101877659A (en) * | 2010-06-30 | 2010-11-03 | 中兴通讯股份有限公司 | Method, device and system for monitoring packet loss |
| CN106411539B (en) * | 2015-07-21 | 2019-07-12 | 中国移动通信集团公司 | The method, apparatus and system of service protection in a kind of multitiered network |
| CN106357529A (en) * | 2015-07-21 | 2017-01-25 | 中国移动通信集团公司 | Method, device and system for protecting services in multilayer network |
| WO2017012431A1 (en) * | 2015-07-21 | 2017-01-26 | 中国移动通信集团公司 | Service protection method, device, and system in multi-layer network |
| CN106411539A (en) * | 2015-07-21 | 2017-02-15 | 中国移动通信集团公司 | Business protection method, device and system in multilayer networks |
| CN105045674A (en) * | 2015-09-15 | 2015-11-11 | 浪潮(北京)电子信息产业有限公司 | Link switching method and system |
| CN106685682A (en) * | 2015-11-10 | 2017-05-17 | 中国移动通信集团公司 | Fault processing method, network device and system |
| CN111448825A (en) * | 2018-06-13 | 2020-07-24 | 华为技术有限公司 | Transmission control method and equipment |
| CN111448825B (en) * | 2018-06-13 | 2021-06-15 | 华为技术有限公司 | Transmission control method and equipment |
| US11553393B2 (en) | 2018-06-13 | 2023-01-10 | Huawei Technologies Co., Ltd. | Transmission control method and device |
| WO2020043075A1 (en) * | 2018-08-30 | 2020-03-05 | 华为技术有限公司 | Method for recovering faulty multi-layer link and controller |
| US11552881B2 (en) | 2018-08-30 | 2023-01-10 | Huawei Technologies Co., Ltd. | Faulty multi-layer link restoration method and controller |
| CN110661705A (en) * | 2019-09-29 | 2020-01-07 | 北京物芯科技有限责任公司 | Hardware network switching engine and network fault processing system and method |
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| WO2010003323A1 (en) | 2010-01-14 |
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