CN107104870A - The interchanger that a kind of achievable multiple network redundancy is set - Google Patents
The interchanger that a kind of achievable multiple network redundancy is set Download PDFInfo
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- CN107104870A CN107104870A CN201710251861.0A CN201710251861A CN107104870A CN 107104870 A CN107104870 A CN 107104870A CN 201710251861 A CN201710251861 A CN 201710251861A CN 107104870 A CN107104870 A CN 107104870A
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
- H04L12/437—Ring fault isolation or reconfiguration
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Abstract
The invention discloses the interchanger that a kind of achievable multiple network redundancy is set, including：Networking model selecting module, storage module, networking detection module, processing module.The interchanger that the present invention is provided can realize that multiple network redundancy is set, including monocyclic, intersecting ring, chain type Self-healing Rings, dual homed Self-healing Rings, feature-rich, and easily establish the network of complexity, high to the redundancy backup protection reliability of exchange service；In addition, the interchanger directly performs business recovery when carrying out redundancy backup protection by root switch; looked for one's roots without time-consuming, while business recovery is also that root switch is open-minded by port blocked, without intermediate link; the self-healing efficiency high of network, can effectively improve the Safety Redundancy protection to exchange service.
Description
Technical field
The present invention relates to industrial switch technical field, the exchange that more particularly to a kind of achievable multiple network redundancy is set
Machine.
Background technology
In order to keep the stability of network, many group of switches into network environment in, be generally used some backup
Connection, to improve robustness, the stability of network, backup connection here is also referred to as backup link or redundant link.
Function is more dull in terms of existing industrial ring exchanger redundancy backup protection, it is impossible to carry out complicated networking,
The reliability of redundancy protecting, which is difficult to meet, to be required；And existing industrial ring exchanger uses Spanning-Tree Protocol mostly, so
Cause to select root time-consuming and calculating path cost is very big, network self-healing inefficiency.
The content of the invention
In order to solve problem of the prior art, set the embodiments of the invention provide a kind of achievable multiple network redundancy
Interchanger.The technical scheme is as follows：
On the one hand, the embodiments of the invention provide the interchanger that a kind of achievable multiple network redundancy is set, including：
Networking model selecting module, the networking model for determining interchanger according to the selection of user, the networking model
Including：Monocyclic, intersecting ring, chain type Self-healing Rings, dual homed Self-healing Rings；
Storage module, is calculated, the procotol includes for storing procotol corresponding with networking model：Monocyclic association
View, intersecting ring agreement, chain type Self-healing Rings agreement, dual homed Self-healing Rings agreement；
Networking detection module, for detect user choose the corresponding network of networking model whether normal work；
Processing module, for according to the corresponding procotol of networking model, in network normal work, being provided for interchanger
Corresponding redundancy backup protection.
In the above-mentioned interchanger of the embodiment of the present invention, the chain type Self-healing Rings include：An at least one single-stranded and list
Ring, every it is single-stranded including：At least two series connection interchangers, it is monocyclic including：At least three are sequentially connected interchanger, and every single-stranded
Different from the monocyclic middle any two interchanger connections respectively of the interchanger at two ends.
In the above-mentioned interchanger of the embodiment of the present invention, when user selects the networking model of chain type Self-healing Rings,
The networking detection module, the interchanger for being additionally operable to be connected into chain type Self-healing Rings sends the first detection packet,
The first detection packet includes：First detection data message and respective mac address information；
The networking detection module, is additionally operable to receive the first new detection packet that connected interchanger is sent, described new
First detection packet include：The first new detection information and the MAC information for the interchanger that is connected, the first new detection letter
Cease what the first detection packet received by the interchanger parsing that is connected was obtained；
The networking detection module, is additionally operable to by default chain type Self-healing Rings agreement, parses new first received
Packet is detected, the first new detection information is obtained；
The networking detection module, is additionally operable to the first new detection data message for being obtained when parsing is sent out with it the
When one detection data message is identical, chain type Self-healing Rings normal work is judged.
In the above-mentioned interchanger of the embodiment of the present invention, the processing module is additionally operable to judge that chain type Self-healing Rings are normal
During work, the port of interchanger is configured to blocked state；
The processing module, is additionally operable to when the first detection data message that interchanger can not be received with it sends out is identical
First detection data message when, the port of interchanger is configured to opening state.
In the above-mentioned interchanger of the embodiment of the present invention, the blocked state be switch ports themselves do not receive, do not forward it is logical
Letter data, but receive, forward first to detect packet；
The opening state is that switch ports themselves are received, forwarding first detects packet and communication data.
In the above-mentioned interchanger of the embodiment of the present invention, the dual homed Self-healing Rings include：At least one interchanger and multiple
Be connected or tangent monocyclic, two looped network ports of interchanger respectively from it is any it is monocyclic in one or two different interchanger connect
Connect, it is described monocyclic in series by least three interchangers.
In the above-mentioned interchanger of the embodiment of the present invention, when user selects the networking model of dual homed Self-healing Rings,
The networking detection module, the interchanger for being additionally operable to be connected into dual homed Self-healing Rings sends the second detection packet,
The second detection packet includes：Second detection data message and respective mac address information；
The networking detection module, is additionally operable to receive the second new detection packet that connected interchanger is sent, described new
Second detection packet include：The second new detection information and the MAC information for the interchanger that is connected, the second new detection letter
Cease what the second detection packet received by the interchanger parsing that is connected was obtained；
The networking detection module, is additionally operable to by default dual homed Self-healing Rings agreement, parses new second received
Packet is detected, the second new detection information is obtained；
The networking detection module, is additionally operable to the second new detection data message for being obtained when parsing is sent out with it the
When two detection data messages are identical, dual homed Self-healing Rings agreement normal work is judged.
In the above-mentioned interchanger of the embodiment of the present invention, the processing module is additionally operable to judge that dual homed Self-healing Rings are normal
During work, the port of interchanger is configured to blocked state；
The processing module, is additionally operable to when the second detection data message that interchanger can not be received with it sends out is identical
Second detection data message when, the port of interchanger is configured to opening state.
In the above-mentioned interchanger of the embodiment of the present invention, the blocked state be switch ports themselves do not receive, do not forward it is logical
Letter data, but receive, forward second to detect packet；
The opening state is that switch ports themselves are received, forwarding second detects packet and communication data.
It is described monocyclic in series by least three interchangers in the above-mentioned interchanger of the embodiment of the present invention, the phase
Cross ring includes multiple connected monocyclic.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
Interchanger provided in an embodiment of the present invention can realize that multiple network redundancy is set, including monocyclic, intersecting ring, chain type
Self-healing Rings, dual homed Self-healing Rings, it is feature-rich, and the network of complexity has been easily established, the redundancy backup of exchange service is protected
Protect reliability high；In addition, the interchanger directly performs business recovery when carrying out redundancy backup protection by root switch, without
It is time-consuming to look for one's roots, while business recovery is also that root switch is open-minded by port blocked, without intermediate link, the self-healing efficiency of network
Height, can effectively improve the Safety Redundancy protection to exchange service.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the structural representation for the interchanger that a kind of achievable multiple network redundancy that the embodiment of the present invention one is provided is set
Figure；
Fig. 2 is a kind of schematic diagram for chain type Self-healing Rings that the embodiment of the present invention one is provided；
Fig. 3 is a kind of schematic diagram for dual homed Self-healing Rings that the embodiment of the present invention one is provided；
Fig. 4 is a kind of monocyclic schematic diagram that the embodiment of the present invention one is provided；
Fig. 5 is a kind of schematic diagram for intersecting ring that the embodiment of the present invention one is provided.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment one
The embodiments of the invention provide the interchanger that a kind of achievable multiple network redundancy is set, referring to Fig. 1, the interchanger
It can include：
Networking model selecting module 100, the networking model for determining interchanger according to the selection of user, the networking mould
Formula includes：Monocyclic, intersecting ring, chain type Self-healing Rings, dual homed Self-healing Rings.
Storage module 200, is calculated, the procotol includes for storing procotol corresponding with networking model：It is monocyclic
Agreement, intersecting ring agreement, chain type Self-healing Rings agreement, dual homed Self-healing Rings agreement.
Networking detection module 300, for detect user choose the corresponding network of networking model whether normal work.
Processing module 400, for being interchanger in network normal work according to the corresponding procotol of networking model
Corresponding redundancy backup protection is provided.
In the present embodiment, the interchanger can realize that multiple network redundancy is set, including：Monocyclic, intersecting ring, chain type are certainly
More ring, dual homed Self-healing Rings, networking mode are various and flexible, can easily set up complex network, while service protection function has been ensured,
Improve the reliability of networking.
Alternatively, monocyclic in series by least three interchangers referring to Fig. 4 and Fig. 5, intersecting ring includes multiple connected
It is monocyclic.
It should be noted that using monocyclic and intersecting ring networking model, to realize that redundancy backup protection is the more commonly used
Form, seldom explain here.
Alternatively, referring to Fig. 2, chain type Self-healing Rings include：At least one it is single-stranded and one it is monocyclic, every it is single-stranded including：Extremely
The interchangers of few two series connection, it is monocyclic including：At least three are sequentially connected interchanger (such as the single-stranded interchanger 1 in Fig. 2), often
The interchanger (such as monocyclic interchanger 2 in Fig. 2) different from monocyclic middle any two be even respectively for the interchanger at the single-stranded two ends of bar
Connect.
In the present embodiment, the single-stranded interchanger at single-stranded two ends can be defined as chain head and last-of-chain (in chain head and last-of-chain
Between can connect multiple single-stranded interchangers, or single-stranded interchanger of not connecting), chain head and last-of-chain respectively with monocyclic middle any two
Different monocyclic interchanger connections, it is so monocyclic at one on can build a plurality of single-stranded, and then complex network knot can be set up out
Structure, while being protected for every single-stranded redundancy backup that provides, improves the reliability of whole network.It should be noted that here
Single-stranded interchanger 1 and monocyclic interchanger 2 are the interchanger for the achievable multiple network redundancy setting that the present embodiment is provided.
Further, referring to Fig. 1, when user selects the networking model of chain type Self-healing Rings,
Networking detection module 300, the interchanger for being additionally operable to be connected into chain type Self-healing Rings sends the first detection packet, the
One detection packet includes：First detection data message and respective mac address information.
Networking detection module 300, is additionally operable to receive the first new detection packet that connected interchanger is sent, described new
First detection packet includes：The first new detection information and the MAC information for the interchanger that is connected, the first new detection information
What the first detection packet received by the interchanger parsing that is connected was obtained.
Networking detection module 300, is additionally operable to by default chain type Self-healing Rings agreement, parses the first new inspection received
Packet is surveyed, the first new detection information is obtained.
Networking detection module 300, is additionally operable to the first new detection data message for being obtained when parsing is sent out with it the
When one detection data message is identical, chain type Self-healing Rings normal work is judged.
In the present embodiment, the single-stranded interchanger at single-stranded two ends is respectively to connected interchanger (single-stranded interchanger or list
Ring interchanger) the first detection packet is sent, connected interchanger is received after the first detection packet, can be according to default chain
Formula Self-healing Rings protocol algorithm, parsing first detects packet, obtains the first new detection data message, then by the first new inspection
Survey data message and the MAC information of itself assembled, form the first new detection packet, sent to connected interchanger,
The like, until forming circulation in chain type Self-healing Rings.
Further, referring to Fig. 1, processing module 400 is additionally operable to, when judging chain type Self-healing Rings normal work, to exchange
The port of machine is configured to blocked state, and the blocked state is that switch ports themselves do not receive, do not forward communication data, but receives, turns
Hair first detects packet.
Processing module 400, is additionally operable to when the first detection data message that interchanger can not be received with it sends out is identical
First detection data message when, the port of interchanger is configured to opening state, the opening state be switch ports themselves receive,
Forwarding first detects packet and communication data.
It is worked under chain type Self-healing Rings networking model that the interchanger that the present embodiment is provided is sketched with reference to Fig. 2
Journey：
When in chain type Self-healing Rings, two interchangers at single-stranded two ends are defined and are set to after chain head and last-of-chain respectively, chain
Head and last-of-chain interchanger detect packet by first of the local mac address containing oneself respectively, are carried out toward connected interchanger
Send；The interchanger being joined directly together with chain head or last-of-chain interchanger is received after the first detection packet, according to default chain
Formula Self-healing Rings protocol algorithm, parses the packet, and then the information such as its local MAC Address, the first detection data message are entered
Row assembling, then sent toward next interchanger in chain type Self-healing Rings；By that analogy.When all interchanger meters on a chain type ring
When calculating same first detection data message, illustrate that chain type ring is existing, resistance can be configured to a port of interchanger immediately
Plug-like state, to prevent broadcast storm.In normal work, ceaselessly taking turn detection first detects data to every interchanger
Bag, if state does not change on chain, maintains to be configured to blocked state to some port on chain.If some connectivity port is broken on chain
Open or certain interchanger power down after, just can not detect packet toward next stage interchanger transmission first；When former port blocked is handed over
Change planes when can not receive the first detection data, just former port blocked is carried out to open configuration, recovers data link at once.If by chain head
The detection carried out with last-of-chain interchanger is rediscovered in the presence of chain type Self-healing Rings, can be configured to resistance to a port of interchanger again
Plug-like state, prevents broadcast storm.
In the present embodiment, above-mentioned chain type Self-healing Rings be on the basis of monocyclic, it is a plurality of single-stranded by accessing, construct
A kind of new Self-healing Rings, and it is a plurality of single-stranded by adding, the complex network structures protected with redundancy backup can be set up out,
Improve the reliability of whole network.
Alternatively, referring to Fig. 3, dual homed Self-healing Rings include：At least one interchanger (such as host's interchanger 3 in Fig. 3)
Be connected or tangent monocyclic with multiple, two looped network ports of interchanger respectively from it is any it is monocyclic in one or two different friendship
Change planes (such as the node switch 4 in Fig. 3) connection, it is monocyclic in series by least three interchangers.
In the present embodiment, above-mentioned dual homed Self-healing Rings are defined and planned based on node (i.e. interchanger), therefore place
Two central ports of host exchange can access the different node of any tangent rings, any two among intersecting ring.This two
Node may belong to different monocyclic, can also belong to same monocyclic, connected mode very flexibly and conveniently, the redundancy of business
Backup protection is effective all the time.It should be noted that above-mentioned host's interchanger 3 and node switch 4 are what the present embodiment was provided
The interchanger that multiple network redundancy is set can be achieved.
Further, referring to Fig. 1, when user selects the networking model of dual homed Self-healing Rings,
Networking detection module 300, the interchanger for being additionally operable to be connected into dual homed Self-healing Rings sends the second detection packet, the
Two detection packets include：Second detection data message and respective mac address information.
The networking detection module 300, is additionally operable to receive the second new detection packet that connected interchanger is sent, newly
Second detection packet includes：The second new detection information and the MAC information for the interchanger that is connected, the second new detection information is by phase
What the second detection packet that even interchanger parsing is received was obtained.
The networking detection module 300, is additionally operable to by default dual homed Self-healing Rings agreement, parses new the received
Two detection packets, obtain the second new detection information.
The networking detection module 300, is additionally operable to when the second new detection data message that parsing is obtained is sent out with it
Second detection data message it is identical when, judge dual homed Self-healing Rings agreement normal work.
In the present embodiment, identical dual homed Self-healing Rings agreement is preset with host's interchanger and node switch, led to
Cross the algorithm and obtain the second detection data message to parse, and obtained the second detection data message and the MAC of itself will be parsed
Address information packing assembling, forms the second new detection packet, resumed in dual homed Self-healing Rings relaying it is defeated, until being transmitted back to host
In interchanger.
Further, referring to Fig. 1, processing module 400 is additionally operable to, when judging dual homed Self-healing Rings normal work, to exchange
The port of machine is configured to blocked state, and the blocked state is that switch ports themselves do not receive, do not forward communication data, but receives, turns
Hair second detects packet.
Processing module 400, is additionally operable to when the second detection data message that interchanger can not be received with it sends out is identical
Second detection data message when, the port of interchanger is configured to opening state, the opening state be switch ports themselves receive,
Forwarding second detects packet and communication data.
It is worked under dual homed Self-healing Rings networking model that the interchanger that the present embodiment is provided is sketched with reference to Fig. 3
Journey：
After host's interchanger is defined and is set to dual homed Self-healing Rings networking model, it will be local containing oneself
Second detection packet of MAC Address, the looped network port toward dual homed Self-healing Rings is transmitted；It is joined directly together with host's interchanger
Node switch receive this second detection packet after, through split parsing this second detection packet, then local
Second detection data message that MAC Address, parsing are obtained etc. is assembled, then is sent out toward next interchanger of dual homed Self-healing Rings
Send；By that analogy.When all interchangers calculate same second detection data message in dual homed Self-healing Rings, illustrate dual homed self-healing
Ring is existing, blocked state is configured to a looped network port of host's interchanger immediately, to prevent broadcast storm.Double
Ceaselessly taking turn detection second detects packet to the every interchanger returned in Self-healing Rings, if state does not change on ring, maintains
Blocked state is configured to some port.If in dual homed Self-healing Rings certain link disconnect or certain interchanger power down after, with regard to nothing
Method detects packet toward next stage interchanger transmission second, and so, the looped network port of script blocked state can not receive the second detection
During packet, just the looped network port of former blocked state is carried out opening configuration, recover data link at once.If by host's interchanger
The detection of initiation is rediscovered in the presence of dual homed Self-healing Rings, and a port in dual homed Self-healing Rings can be configured to again to block shape
State, prevents broadcast storm.
In the present embodiment, above-mentioned dual homed Self-healing Rings are defined and planned based on interchanger, the two of host's interchanger
Individual central port can access the different node of any tangent rings, any two among intersecting ring.This two nodes may belong to
Different is monocyclic, can also belong to same monocyclic, and very flexibly and conveniently, the limitation to host's interchanger is few for connected mode,
It is high to the redundancy backup protection reliability of the business of host's interchanger.
It should be noted that, the interchanger that the present embodiment is provided, in terms of networking, it is possible to achieve multiple network redundancy is set,
It is feature-rich including monocyclic, intersecting ring, chain type Self-healing Rings, dual homed Self-healing Rings, and the network of complexity has been easily established, having
While effect has ensured the security of business information, the reliability of networking is also substantially increased；Simultaneously in terms of self-healing property, directly
Business recovery is performed by root switch, looks for one's roots, while business recovery is also that root switch is open-minded by port blocked, does not have without time-consuming
There is intermediate link, the self-healing efficiency high of looped network, the self-healing time is short, in actual applications, 10 industrial switch networking tests are 5
Self-healing is completed within millisecond, standard of 20 milliseconds far below calling for tenders of project requirement can be provided to be effectively protected and arranged to bearer service
Apply.
Interchanger provided in an embodiment of the present invention can realize that multiple network redundancy is set, including monocyclic, intersecting ring, chain type
Self-healing Rings, dual homed Self-healing Rings, it is feature-rich, and the network of complexity has been easily established, the redundancy backup of exchange service is protected
Protect reliability high；In addition, the interchanger directly performs business recovery when carrying out redundancy backup protection by root switch, without
It is time-consuming to look for one's roots, while business recovery is also that root switch is open-minded by port blocked, without intermediate link, the self-healing efficiency of network
Height, can effectively improve the Safety Redundancy protection to exchange service.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (10)
1. the interchanger that a kind of achievable multiple network redundancy is set, it is characterised in that including：
Networking model selecting module, the networking model for determining interchanger according to the selection of user, the networking model includes：
Monocyclic, intersecting ring, chain type Self-healing Rings, dual homed Self-healing Rings；
Storage module, is calculated, the procotol includes for storing procotol corresponding with networking model：Monocyclic agreement, phase
Cross ring agreement, chain type Self-healing Rings agreement, dual homed Self-healing Rings agreement；
Networking detection module, for detect user choose the corresponding network of networking model whether normal work；
Processing module, for according to the corresponding procotol of networking model, in network normal work, being provided accordingly for interchanger
Redundancy backup protection.
2. interchanger according to claim 1, it is characterised in that the chain type Self-healing Rings include：At least one it is single-stranded and
One is monocyclic, every it is single-stranded including：At least two series connection interchangers, it is monocyclic including：At least three are sequentially connected interchanger, often
Different from the monocyclic middle any two interchanger connections respectively of the interchanger at the single-stranded two ends of bar.
3. interchanger according to claim 2, it is characterised in that when user selects the networking model of chain type Self-healing Rings,
The networking detection module, the interchanger for being additionally operable to be connected into chain type Self-healing Rings sends the first detection packet, described
First detection packet includes：First detection data message and respective mac address information；
The networking detection module, is additionally operable to receive the first new detection packet that connected interchanger is sent, and described new the
One detection packet includes：The MAC information of the first new detection information and the interchanger that is connected, the first new detection information by
What the first detection packet that the interchanger parsing that is connected is received was obtained；
The networking detection module, is additionally operable to by default chain type Self-healing Rings agreement, parses the first new detection received
Packet, obtains the first new detection information；
The networking detection module, is additionally operable to the first inspection sent out when the first new detection data message that parsing is obtained with it
When survey data message is identical, chain type Self-healing Rings normal work is judged.
4. interchanger according to claim 3, it is characterised in that the processing module, is additionally operable to that chain type self-healing ought be judged
During ring normal work, the port of interchanger is configured to blocked state；
The processing module, is additionally operable to when interchanger can not receive the first detection data message identical the sent out with it
During one detection data message, the port of interchanger is configured to opening state.
5. interchanger according to claim 4, it is characterised in that the blocked state is that switch ports themselves are not received, no
Communication data is forwarded, but receives, forward first to detect packet；
The opening state is that switch ports themselves are received, forwarding first detects packet and communication data.
6. interchanger according to claim 1, it is characterised in that the dual homed Self-healing Rings include：At least one interchanger
Be connected or tangent monocyclic with multiple, two looped network ports of interchanger respectively from it is any it is monocyclic in one or two different friendship
Change planes connection, it is described monocyclic in series by least three interchangers.
7. interchanger according to claim 6, it is characterised in that when user selects the networking model of dual homed Self-healing Rings,
The networking detection module, the interchanger for being additionally operable to be connected into dual homed Self-healing Rings sends the second detection packet, described
Second detection packet includes：Second detection data message and respective mac address information；
The networking detection module, is additionally operable to receive the second new detection packet that connected interchanger is sent, and described new the
Two detection packets include：The MAC information of the second new detection information and the interchanger that is connected, the second new detection information by
What the second detection packet that the interchanger parsing that is connected is received was obtained；
The networking detection module, is additionally operable to by default dual homed Self-healing Rings agreement, parses the second new detection received
Packet, obtains the second new detection information；
The networking detection module, is additionally operable to the second inspection sent out when the second new detection data message that parsing is obtained with it
When survey data message is identical, dual homed Self-healing Rings agreement normal work is judged.
8. interchanger according to claim 7, it is characterised in that the processing module, is additionally operable to that dual homed self-healing ought be judged
During ring normal work, the port of interchanger is configured to blocked state；
The processing module, is additionally operable to when interchanger can not receive the second detection data message identical the sent out with it
During two detection data messages, the port of interchanger is configured to opening state.
9. interchanger according to claim 8, it is characterised in that the blocked state is that switch ports themselves are not received, no
Communication data is forwarded, but receives, forward second to detect packet；
The opening state is that switch ports themselves are received, forwarding second detects packet and communication data.
10. interchanger according to claim 1, it is characterised in that described monocyclic in series by least three interchangers,
The intersecting ring includes multiple connected monocyclic.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768894A (en) * | 2018-04-28 | 2018-11-06 | 江苏中安智信通信科技股份有限公司 | Optimize the switch system of looped network forward-path |
| CN110247835A (en) * | 2019-06-13 | 2019-09-17 | 深圳市遐域技术有限公司 | A kind of industrial switch loop network with dual redundant defencive function |
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