CN101197747B - System and method for industrial real-time control Ethernet redundancy fault-tolerant network - Google Patents
System and method for industrial real-time control Ethernet redundancy fault-tolerant network Download PDFInfo
- Publication number
- CN101197747B CN101197747B CN2007101795858A CN200710179585A CN101197747B CN 101197747 B CN101197747 B CN 101197747B CN 2007101795858 A CN2007101795858 A CN 2007101795858A CN 200710179585 A CN200710179585 A CN 200710179585A CN 101197747 B CN101197747 B CN 101197747B
- Authority
- CN
- China
- Prior art keywords
- control domain
- core
- redundancy
- node equipment
- equipment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Small-Scale Networks (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses an industry real-time control Ethernet redundancy fault tolerance network system and a method, including at least two control domains and at least one public domain connected with all control domains, wherein, each control domain adopts multipoint crossed redundancy ring network structure, core nodal point equipments on cross points are all connected with primary nodal point equipment and backup nodal point equipment of the public domain. On the basis of the prior ring network redundancy, the invention also realizes the redundancy of the core equipments needing external communication; when a primary core exchanger fails, a core exchanger which works in the backup mode is switched to work in the primary mode, the switch time is quite short. The invention also increases the double redundancy function of a public domain exchanger, the RSTP protocol is applied to the connection between the public domain and the control domains, which considers requirements on quickness as well as simpleness. In the invention, the core exchanger of the control domains adopts the ACL or the cross VLAN to replace a special bridge, thereby reducing equipment category and possible fault points and lowering delay.
Description
Technical field
The present invention relates to the technical field of industrial automation real-time control network, be specifically related to redundancy fault-tolerant technology and the quick handoff technique of network configuration that Ethernet is controlled in industrial automation in real time.
Background technology
Utilize industrial automation to control Ethernet in real time, can and be distributed at centralized-control center Ethernet data transmission and exchange are provided between the equipment of industry spot each point, adopt the tcp/ip communication agreement to realize that industrial automation controls in real time.In recent years, along with when ethernet technology is used widely in industrial automation control in real time, strengthen the high reliability of Ethernet itself, shorten the fail-over time of network, industrial automation control is in real time had great significance, related industry-by-industry is controlled in industrial automation in real time, all is a basic demand.
Traditional industrial time controlling ethernet redundancy fault tolerant network system comprises 1# control domain, 2# control domain and a PD as shown in Figure 1.Control system with the power plant is an example, the 1# control domain can comprise the control system of 3 big main frames (boiler, steam engine, generator) in the 1st cover electricity generation system, the 2# control domain can comprise the control system of 3 big main frames in the 2nd cover electricity generation system, PD then comprises simultaneously some auxiliary systems for this two covers electricity generation system service, as with relevant control system such as coal, water, ash, gas.Need between 1# and the 2# control domain to isolate, PD needs to communicate with 1#, 2# control domain simultaneously.
As can be seen from Figure 1, the structure of 1# control domain is identical with 2#, all adopt the dual-ring network structure, each ring is independently, and two rings one main are equipped with, and the node in the looped network (is to be example with the power plant by switch here, in other application scenario can not be switch, can be referred to as node device) constitute, switch further links together with equipment such as the real-time decentralized control processing unit of industry (DPU) 100, man-machine interface station (MMI) 102, forms the industrial time controlling net of a redundancy.And PD comprises that also one main one is equipped with two groups of switches (one or more switch can be arranged), and the active and standby switch of common field respectively is connected respectively to a switch (hereinafter referred to as core switch) on the active and standby ring of 1# and 2# control domain by a special-purpose bridge.The effect of isolating two control domain information is played in information transmission between special-purpose bridge control 1# and 2# control domain and the common field.That is, the main of PD and 2 control domains constitutes two big active and standby systems with switch and backup switch in this network system.
But these two active and standby systems are independently, do not connect each other.Isolate though can realize Single Point of Faliure in looped network, this can't satisfy the requirement of the redundancy fault-tolerant of industrial automation high reliability.For example, the core switch of using as 1# control domain master (or its link) is when breaking down, then whole master can not be used with system again, must switch to back-up system, if core switch or the backup switch in the PD (or institute on line road) in the 1# control domain back-up system also breaks down a little at this moment, though this moment, the master of PD can work with switch, can not set up effective path, can't realize fault recovery.
Common ethernet redundancy handoff technique is to depend on RSTP or MSTP agreement, adopts reconstruction ethernet network transmission structure to realize.Adopt the RSTP agreement under the situation that three switches are arranged, approximately need 50ms switching time, along with increasing of switch, can increase rapidly switching time is 1～3 second.Switch in the industrial time controlling net is generally more, if break down a little, finish switching in the so long time, means that big interruption can appear in network.This is difficult to accept in control at technical grade in real time.In the technical grade control in real time, the network that breaks down should be controlled in the 100ms switching time.
Moreover, owing to there is this independent equipment of special-purpose bridge,, increased delay and possible fault point though can realize isolating the function of allotment.If special-purpose bridge breaks down causing the control system paralysis, finally may cause serious industrial accident.
Therefore, how further strengthening the high reliability of industrial time controlling ethernet redundancy fault tolerant network system, the fail-over time that shortens network, the efficient that improves the isolation scheduling and reliability is problem anxious to be solved.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of industrial time controlling ethernet redundancy fault tolerant network system and method, can satisfy the quick switching requirement of commercial Application, and improves the reliability of system.
In order to address the above problem, the invention provides a kind of industrial time controlling ethernet redundancy fault tolerant network system, comprise at least one control domain, and at least one PD that is connected with each control domain, the redundant looped network structure that described each control domain all adopts multiple spot to intersect, and each the core node equipment at the place, crosspoint all is connected to the main with node device and secondary node equipment of PD, wherein, the core node equipment at crosspoint place is directly connected to the main with node device and secondary node equipment of PD, realizes that by the access control list ACL or the virtual LAN VLAN of intersecting the information between control domain isolates.
Further, said system also can have following characteristics: the redundant looped network structure that described multiple spot intersects comprises two rings, and these two rings have two crossover nodes.
Further, said system also can have following characteristics: the main of described PD is connected with secondary node equipment with node device, the main of described PD constitutes fully connected topology with node device and secondary node equipment with described control domain equipment, and utilization RSTP RSTP agreement realizes redundant the switching.
Further, said system also can have following characteristics: this system comprises two control domains and a PD.
The present invention also provides a kind of industrial time controlling ethernet redundancy fault-tolerant method, may further comprise the steps:
(1) makes up the Ethernet that comprises a PD and at least one control domain, described control domain is connected with PD, node device in the described control domain is formed the redundant looped network structure that multiple spot intersects, each core node equipment at place, crosspoint all is connected to the main node device and the secondary node equipment used of PD;
(2) the node device monitoring network state in the described control domain, network failure appears and after, adopt any communication path that rebulids in fast looped network handoff technique, dual loop redundancy technology, the high-performance redundant looped network technology.
Further, in the described step (1), the method for the node device in the described control domain being formed the redundant looped network structure of multiple spot intersection is that with two rings of the composition of the node device in the described control domain, these two rings have two crossover nodes.
Further, described step (2) also comprises step (3) afterwards: the core node equipment at place, described crosspoint is by the information between access control list ACL or intersection virtual LAN VLAN isolated controlling territory.
Further,
Described step also comprises in (1), and the main of described PD is connected with secondary node equipment with node device, and the main of described PD constitutes fully connected topology with node device and secondary node equipment with described control domain equipment;
Accordingly, described step also comprises in (2), and the network state between the monitoring of equipment of described PD and described control domain node device when network failure occurring, adopts Spanning-Tree Protocol RSTP agreement to rebulid communication path.
In sum, network system of the present invention and method are based on the redundant handoff technique of the ethernet ring network of quick switching, build the ring network structure of multiple spot crossing redundancy, under the situation that a plurality of networkings link and a plurality of network equipment break down, guarantee the unimpeded of whole industrial control network by quick switching, switching fast its switching time should be less than 100ms, and the high-efficiency reliable isolation technology is provided.With respect to existing network system, have following remarkable advantages:
Two core switch on each control domain crosspoint all can provide service for two rings, therefore work in main with behind the core switch generation Single Point of Faliure of pattern, the core switch that works in standby mode is switched to the master can finish switching with pattern, needn't switch on the standby ring, switching time is very short.Promptly needing on the basis of prior art looped network redundancy, to have realized the nucleus equipment redundancy of correspondence with foreign country again.In addition, need during with the switching between ring and the standby ring, also be far smaller than switching time needed in the art switching time from main.
Further, each core switch in each control domain all is connected to the main with switch and backup switch of PD, after the master of PD is with exchange fault, can switch to backup switch rapidly, need in control domain, not carry out any switching, therefore improve the reliability of switch speed and work greatly yet.Be equivalent to increase the dual redundant function of common field switch.In addition, in the mesh topology that these equipment constitute,, can use the RSTP agreement, take into account for quick and simple requirement in common field and being connected also of control domain because the common field main preparation system respectively has only a switch.
And,,, reduced delay so reduced device category and possible fault point owing on the core switch of control domain, adopt the ACL control list technique or the vlan technology of intersecting to replace special-purpose bridge.
Description of drawings
Fig. 1 is traditional industrial time controlling ethernet ring network topology schematic diagram.
Fig. 2 is the topological schematic diagram of the quick handover network of a kind of redundancy of the present invention.
Embodiment
Industrial time controlling ethernet redundancy fault tolerant network of the present invention has adopted new topological structure and redundant looped network technology.Adopt the redundant looped network structure of multiple spot intersection and use the fast looped network handoff technique at control domain, can guarantee that the time of switching is enough short, satisfy the industrial automation requirement of control in real time.Simultaneously, two core switch of each control domain all are connected with the active and standby switch of PD, can realize dual redundancy feature.
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.
In order to shorten network failure switching time, a plurality of network equipment provider provide various innovative ethernet ring network technology---comprise the fast looped network handoff technique (RRPP:Rapid RingProtection Protocol) of Huawei Company, the dual loop redundancy technology (Dual Ring and Couple Ring) of grinding magnificent company, the high-performance redundant looped network technology (DT-Ring+) of eastern native telecommunications company etc.These technology are specifically applied to the link layer protocol of ethernet ring network, and the redundant looped network structure that adopts multiple spot to intersect can prevent the broadcast storm that data loopback causes in ethernet ring network.When Ethernet ring uplink or equipment fault, can switch to backup link or alternate device rapidly, guarantee the fast quick-recovery of network.Compare with STP, RSTP, MSTP agreement, this type of technology has multilink redundancy, the fast significant advantage of topological switch speed.
For example, at publication number is CN1812361, open day is on August 2nd, 2006, denomination of invention is in the Chinese invention patent application of " fast ring network protecting method and system ", a kind of fast switch over method of looped network is disclosed, it is by creating the fast looped network protected field, and by the continuous ring that forms of port, each node comprises two ports that are connected on the ring between each node; Host node is made as forward mode with first port, and second port is made as blocking model; Mode by access control list, forwarding-table item or VLAN is known link failure, and VLAN is transmitted data message and protocol massages; When knowing link failure, host node is made as forward mode with second port, and refreshes transmitting of host node and other nodes, thereby realizes the quick switching of looped network.
Again for example, at publication number is CN1905490, open day is on January 31st, 2007, denomination of invention is in the Chinese invention patent application of " preventing the method and apparatus of loop when a kind of RRPP and partial STP network damage recovery ", disclose a kind ofly on the basis of the quick handoff technique of looped network, prevented from looped network to form the method for loop.The non-working port of this method by having recovered on the interim obstruction faulty link, and is set interim blocking time, or not the STP configuration message when making non-working port be in interim obstruction, after the equipment of transmission detection messages is received the detection messages that oneself sends, occlusion detection message port, thus prevented from network, to form loop.
The redundant handover network topology fast of present embodiment comprises 1# control domain, 2# control domain and a PD as shown in Figure 2.The redundant looped network structure that adopts multiple spot to intersect in each control domain promptly has two active and standby each other rings that are formed by connecting by many switches, and these two rings intersect at 2 points (or more than 2), and the node of infall is a core switch.In this redundant looped network, can adopt and to realize the ethernet ring network technology of switching fast.Just often, the nucleus equipment at crosspoint place all is in state of activation, and one works in and mainly use pattern, and one works in standby mode, and can be regularly the other side's state be detected, and can realize quick switching in case break down.
As can be seen from the figure, each core switch of each control domain all is connected with backup switch with switch with the main of PD, the main of PD connects with also existing between switch and the backup switch, constitute the fully connected topology that comprises 6 nodes jointly, realized PD switch redundancy feature.Present embodiment is used the RSTP agreement in this fully connected topology, as can be seen from Figure 2, in this topology, core switch 1A0 and PD master have constituted a minor loop of being made up of 3 nodes with switch 3A0, backup switch 3B0, and the situation of other core switch also is like this.Like this, when the switch of common field or line fault will be switched, only need in this minor loop, to switch calculating and get final product, so only need its switching time can satisfy the requirement of industrial time controlling about 50ms.If in this structure, use above-mentioned ethernet ring network technology again, can cause core switch too complicated and be difficult to realize.
In addition, removed special-purpose bridge in the present embodiment, each core switch directly has been connected with the primary, spare switch of PD.In order to realize effectively isolating the purpose of two control domains, realize effective isolation between control domain adopting access control list (ACL) on the core switch or intersect the Virtual Local Area Network technology, the control strategy that adopts is the data turnover of forbidding that another control domain is all, allow other all data turnover, thereby realizing having reduced possible delay and fault point on the basis that effectively isolates.
Moreover present embodiment is provided with two network interface cards on each controlled processing unit that is connected with switch, and two network interface cards are worked simultaneously, is connected with switch in the active and standby looped network respectively, and making looped network break down does not influence the continuation communication of controlled processing unit when switching.
As can be seen, present embodiment has improved the reliability and the switch speed of industrial time controlling ethernet redundancy fault tolerant network greatly.Be illustrated with some examples that the multiple spot fault takes place again below, please be simultaneously with reference to Fig. 2.
If the 1# control domain is main with the non-core switch of ring or its link occurs fault, 1# control domain network configuration develops into hub-and-spoke configuration rapidly, does not influence data communication fully.
If 1# control domain master switches on the 1# control domain reserve link with core switch or its link occurs fault of ring, and current and the PD backup switch standby nucleolus heart of this 1# control domain switch communication also break down.At this moment, can pass through the RSTP agreement, the core switch of this standby ring of 1# control domain and the master of PD are communicated with switch, realize the recovery of network failure.
In a word, the network of building according to this topology, under the situation that multiple link or equipment fault occur, whole ethernet ring network is set up standby transmission link fast in the extremely short time, reach the target that fast-speed redundancy switches, and increased the redundancy feature of control domain core switch and common field switch.Because the technique scheme utilization makes the redundancy of ethernet ring network switch recovery time less than 50ms, has met the requirement that industrial automation control is switched the Ethernet fast-speed redundancy.
Above-mentioned elaboration only is the technical conceive and the characteristics of the quick handover network topology of explanation this industrial time controlling ethernet redundancy, and its purpose is to allow the personage who is familiar with this technology can understand its content and enforcement according to this, can not limit its scope with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.Though for example in the foregoing description all with switch as network node, also can be any other communication node equipment in the commercial Application.
Claims (9)
1. industrial time controlling ethernet redundancy fault tolerant network system, comprise at least one control domain, and at least one PD that is connected with each control domain, it is characterized in that: the redundant looped network structure that described each control domain all adopts multiple spot to intersect, and each the core node equipment at the place, crosspoint all is connected to the main with node device and secondary node equipment of PD, wherein, the core node equipment at crosspoint place is directly connected to the main with node device and secondary node equipment of PD, realizes that by the access control list ACL or the virtual LAN VLAN of intersecting the information between control domain isolates.
2. the system as claimed in claim 1 is characterized in that:
The redundant looped network structure that described multiple spot intersects comprises two rings, and these two rings have two crossover nodes.
3. system as claimed in claim 1 or 2 is characterized in that:
The main of described PD is connected with secondary node equipment with node device, the main of described PD constitutes fully connected topology with node device and secondary node equipment with described control domain core node equipment, and the utilization RSTP is realized redundant the switching.
4. the system as claimed in claim 1, it is characterized in that: this system comprises two control domains and a PD.
5. method that the industrial time controlling ethernet redundancy is fault-tolerant is characterized in that: may further comprise the steps:
(1) makes up the Ethernet that comprises a PD and at least one control domain, node device in the described control domain is formed the redundant looped network structure that multiple spot intersects, and each core node equipment at place, crosspoint all is connected to the main with node device and secondary node equipment of PD;
(2) the node device monitoring network state in the described control domain, network failure appears and after, adopt rebulid communication path switching time less than the looped network redundancy technology of 100ms.
6. method as claimed in claim 5 is characterized in that:
Step (1) is that the node device in the described control domain is formed two rings, and makes these two rings have two crossover nodes, the core node equipment of the equipment on described crosspoint for communicating by letter with PD.
7. method as claimed in claim 5 is characterized in that:
The core node equipment at place, described crosspoint is by the information between access control list ACL or intersection virtual LAN VLAN isolated controlling territory.
8. method as claimed in claim 5 is characterized in that:
The Ethernet that step (1) makes up comprises two control domains and a PD.
9. as claim 5 or 8 described methods, it is characterized in that:
Step (1) also is connected with node device the main of described PD with secondary node equipment, the main of described PD constitutes fully connected topology with the core node equipment of communicating by letter with PD in node device and secondary node equipment and the described control domain, and on this fully connected topology, use RSTP RSTP agreement, when network failure occurring, realize switching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101795858A CN101197747B (en) | 2007-12-14 | 2007-12-14 | System and method for industrial real-time control Ethernet redundancy fault-tolerant network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101795858A CN101197747B (en) | 2007-12-14 | 2007-12-14 | System and method for industrial real-time control Ethernet redundancy fault-tolerant network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101197747A CN101197747A (en) | 2008-06-11 |
| CN101197747B true CN101197747B (en) | 2010-07-28 |
Family
ID=39547908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101795858A Active CN101197747B (en) | 2007-12-14 | 2007-12-14 | System and method for industrial real-time control Ethernet redundancy fault-tolerant network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101197747B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082696A (en) * | 2011-03-10 | 2011-06-01 | 中控科技集团有限公司 | Redundancy network system and message sending method based on same |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867468B (en) * | 2010-06-03 | 2015-04-01 | 中兴通讯股份有限公司 | Hot reboot processing method for power over Ethernet switch and power over Ethernet switch |
| CN101958821A (en) * | 2010-10-29 | 2011-01-26 | 国电南瑞科技股份有限公司 | Transregional double ring network topology of electric power dispatch automation system |
| CN101984610B (en) * | 2010-12-01 | 2012-10-17 | 卓越信通电子（北京）有限公司 | Fault-tolerant network switch |
| WO2013002855A1 (en) * | 2011-06-30 | 2013-01-03 | Schneider Electric Industries Sas | Dual-ring switch for rstp networks |
| CN103312635B (en) * | 2013-07-02 | 2016-05-04 | 北京空间飞行器总体设计部 | The computational methods of a kind of switch redundancy VLAN |
| CN105207871B (en) * | 2014-06-25 | 2020-07-31 | 南京中兴软件有限责任公司 | Double-cut ring network protection method and device |
| CN106936613B (en) * | 2015-12-31 | 2020-03-31 | 北京网御星云信息技术有限公司 | Method and system for rapidly switching main and standby Openflow switch |
| CN108900404B (en) * | 2018-07-11 | 2020-12-25 | 智强通达科技（北京）有限公司 | Super ring network structure for redundancy backup |
| CN109462533B (en) * | 2018-12-29 | 2021-02-23 | 北京东土军悦科技有限公司 | Link switching method, link redundancy backup network and computer readable storage medium |
| CN111308883A (en) * | 2020-03-11 | 2020-06-19 | 天津天通慧翼科技有限公司 | Control method, equipment and system for storage and conveying of cleaning liquid |
| CN112188157B (en) * | 2020-09-24 | 2023-04-18 | 陈旻 | Power-saving video monitoring and transmission system |
| CN113055267A (en) * | 2021-03-16 | 2021-06-29 | 合肥中科离子医学技术装备有限公司 | Redundant looped network communication method for proton treatment safety system |
| CN113078952B (en) * | 2021-03-18 | 2022-07-08 | 中国恩菲工程技术有限公司 | Network system and networking method for intelligent mine |
| CN117234063A (en) * | 2023-11-15 | 2023-12-15 | 山东电力建设第三工程有限公司 | Multi-node ring network redundancy control system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6463033B1 (en) * | 1998-05-04 | 2002-10-08 | Lucent Technologies Inc. | Dual hubbed tree architecture for a communication network |
| CN1885809A (en) * | 2005-06-20 | 2006-12-27 | 杭州华为三康技术有限公司 | Cross interconnection method for RPR and cross site, cross RPR |
| CN101022391A (en) * | 2007-03-13 | 2007-08-22 | 华为技术有限公司 | RPR bidge redundancy protecting method and RPR bridge ring equipment |
| CN201142695Y (en) * | 2007-12-14 | 2008-10-29 | 北京国电智深控制技术有限公司 | Industrial real-time control Ethernet redundancy fault-tolerant network system |
-
2007
- 2007-12-14 CN CN2007101795858A patent/CN101197747B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6463033B1 (en) * | 1998-05-04 | 2002-10-08 | Lucent Technologies Inc. | Dual hubbed tree architecture for a communication network |
| CN1885809A (en) * | 2005-06-20 | 2006-12-27 | 杭州华为三康技术有限公司 | Cross interconnection method for RPR and cross site, cross RPR |
| CN101022391A (en) * | 2007-03-13 | 2007-08-22 | 华为技术有限公司 | RPR bidge redundancy protecting method and RPR bridge ring equipment |
| CN201142695Y (en) * | 2007-12-14 | 2008-10-29 | 北京国电智深控制技术有限公司 | Industrial real-time control Ethernet redundancy fault-tolerant network system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082696A (en) * | 2011-03-10 | 2011-06-01 | 中控科技集团有限公司 | Redundancy network system and message sending method based on same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101197747A (en) | 2008-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101197747B (en) | System and method for industrial real-time control Ethernet redundancy fault-tolerant network | |
| CN100589427C (en) | Automatic protection method of Ethernet | |
| CN101127674B (en) | Initialization method for transmission nodes of Ethernet loop network system | |
| CN101841450B (en) | Method and system for realizing stable communication by forming multiple ring topologies into intersecting ring | |
| CN1981279A (en) | Tandem node system and a method thereor | |
| CN101674240B (en) | Method and device for realizing single-node dual home for distributed system | |
| CN101227371B (en) | Method and apparatus of backup switch among same level switch equipments | |
| CN101141381B (en) | Network node and method of reducing medium access control address learning in looped network thereof | |
| CN101662421A (en) | Method and device for transmitting control message based on ethernet multi-ring network | |
| CN103607293B (en) | A kind of flow rate protecting method and equipment | |
| CN102546430A (en) | Method for redundant backup of network equipment, and routing equipment and system | |
| CN101222402B (en) | Ethernet ring protection method, system and device | |
| CN103036756A (en) | Hybrid looped network protection method and system based on sharing channel | |
| CN101686167A (en) | Method for controlling recovery of faults of Ethernet | |
| CN101626335A (en) | Data protection method of dual-connection network | |
| CN201142695Y (en) | Industrial real-time control Ethernet redundancy fault-tolerant network system | |
| JP5491623B2 (en) | Address refresh method and system | |
| CN101547131B (en) | EAPS looped network single-channel fault location and protection method | |
| CN101136838B (en) | Bridge mode elastic grouping ring transannular bridge equipment redundancy protecting method | |
| CN101621443B (en) | Failure recovery method of Ethernet ring protection system | |
| CN102957588A (en) | Method and system for protecting looped network from broadcast storm | |
| CN102025584A (en) | G.8032-based ring network protecting method and system | |
| CN101771705A (en) | Processing method based on RRPP and device | |
| CN100550812C (en) | Improve method, system and the node device of dependability of fast looped network | |
| CN102014006B (en) | Ethernet ring protection switching method for hybrid network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |