CN101350636B - Method and system for link redundant backup base on photoelectric multiplexing port - Google Patents
Method and system for link redundant backup base on photoelectric multiplexing port Download PDFInfo
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Abstract
The present invention provides a redundancy backup method of link based on a photovoltaic multiplexing port, and a system thereof. The method comprises the following steps: using the cable and the optical fiber of the photovoltaic multiplexing port of the body equipment as a main link and a backup link to connect the correspondent equipment; setting the working mode of the photovoltaic multiplexing port of the body equipment; selecting the links of the same working mode to establish the communication between the body equipment and the correspondent equipment; detecting whether the current communication link is normal; maintaining the connection of the current link if the detection results are normal; and switching the working mode of the body equipment if the detection results are abnormal, and then selecting another link to establish the communication between the body equipment and the correspondent equipment. The method adopts the photovoltaic multiplexing port to realize the redundancy backup of the link, and requires no additional port source. Compared with other dual-uplink redundant backup proposal of the link, the method provides a simpler configuration proposal and faster topological astringency, rapidly transfers the flow onto backup link within 50ms when the link has a failure, and greatly improves the real-time backup capability in the business.
Description
Technical field
The present invention is about communication technical field, especially in regard to the fault recovery field of communication link, and specifically a kind of link redundancy backup method and system based on photoelectric multiplexing port.
Background technology
Along with the expansion rapidly of network size and application, network becomes part indispensable in the social life day by day, enterprise with individual communication with exchange the use that all be unable to do without network.Along with enterprise to the dependent increase of network, network must be safe and reliable, in case the network service is unavailable, possibly have a strong impact on the productivity and the profit of enterprise.Realize higher availability, avoid occurring owing to Single Point of Faliure causes network unavailable.Between two communication nodes of the overall situation, redundant link should be arranged, and carry out the automatic management of topology.
Fig. 1 is the scheme of a kind of general up redundancy backup of realization dual link of industry.Be that example specifies its principle below with the switch: switch A and B are linked to switch C and D through two links on respectively; Wherein a link is a primary link; Be in active state and carry out normal exchanges data; An other link is a backup link, need its obstruction can not be carried out exchanges data, to avoid the generation of data loopback.When primary link breaks down (generally including: the connecting line fault of primary link, the equipment of primary link opposite end or port failure) and breaks off, need the obstruction of cancellation backup link automatically, make its normal exchange.So just the redundancy backup of link can have been realized.For example in Fig. 1, the link that switch A is connected with C under the normal condition is primary link and carries out normal exchanges data that the link that switch A is connected with D is a backup link, needs to block.When the link of switch A and C broke off, switch opens A automatically and the D link exchanges normally, can realize link redundancy backup like this.
The IEEE802.1D standard has been introduced a kind of technology that is used for the control area net logical topology; Be called Spanning-Tree Protocol (Spanning Tree Protocol; Be called for short STP); This technology is exactly to break off backup link when realizing link redundancy, when primary link breaks down, opens the function of backup link automatically.But the normal convergence time of this agreement is 30 seconds, that is to say link from breaking down, and to recovering once more, needs 30 seconds time, and this can not satisfy the requirement of recovered failure in 50 milliseconds that present operator proposes far away.Can find through top link simultaneously, realize that link redundancy backup need use two ports at switch A, above the B, this has also increased the weight of the cost that the client realizes redundancy backup.And, when handoff links, also need change port, therefore also exist needs to relearn MAC (Media Access Control: the medium access control) problem of address.
MAC Address is the physical address of network interface card, is used for each node of LAN is discerned.The physical address of network interface card normally by the burned network interface card of network interface card manufacturer, has global uniqueness.In Ethernet; An Ethernet message has the host MAC address (source MAC) that sends this message; Also have the host MAC address (purpose MAC) that receives this message, switch passes through the source MAC of study inspection message, and this address and the port association that receives this message are got up to form a mac address table; The target MAC (Media Access Control) address that receives a message when next time is during for the address of study, and switch just directly is forwarded to message on the related port of this MAC Address.Be that the MAC table has determined the message forwarding decision-making to a great extent.When adopting the dual link redundancy backup, when carrying out link switchover, because variation has taken place the port that uses, original mac address table is the correct guidance message forwarding again, so need relearn mac address table when launching backup link.
Application number is 200610000565.5, and publication number is CN101001165A, and the prior art that denomination of invention is applied for this case for the Chinese invention patent of " network failure recovery method with redundancy port " is herein incorporated.
Summary of the invention
The purpose of this invention is to provide a kind of link redundancy backup method and system based on photoelectric multiplexing port; The cable of this system's employing photoelectric multiplexing port and optical fiber are as primary link and backup link; Can realize link failure recovery fast, when having solved prior art and adopting two up links to realize link redundancy backup with the STP agreement failure recovery time long, waste port and need relearn defective such as MAC Address.
For realizing above goal of the invention; One embodiment of the invention provides a kind of link redundancy backup method based on photoelectric multiplexing port, and said method comprises: with the cable of the photoelectric multiplexing port of local terminal equipment and optical fiber as primary link and backup link peer end of the connection equipment; The mode of operation of the photoelectric multiplexing port of local terminal equipment is set, selects to have the link establishment local terminal equipment of identical mode of operation and communicating by letter of opposite equip.; Whether normal, if connection normal then that keep current link if detecting current communication link; If undesired, then switch the mode of operation of said local terminal equipment, and select communicating by letter of another link establishment local terminal equipment and opposite equip..
For realizing above goal of the invention; Another embodiment of the present invention provides a kind of link redundancy backup system based on photoelectric multiplexing port; Said system comprises photoelectric multiplexing equipment, adopts the cable of photoelectric multiplexing port to be connected with backup link as primary link with optical fiber between the said photoelectric multiplexing equipment; Said photoelectric multiplexing equipment comprises: mode of operation is provided with the unit, and the mode of operation of the photoelectric multiplexing port of said photoelectric multiplexing equipment is set, and makes the photoelectric multiplexing equipment that is connected in altogether with the period, have identical mode of operation; The communication link negotiation element, the mode of operation of the photoelectric multiplexing equipment that detection is connected when detecting identical mode of operation, selects the mode of operation link corresponding identical with this to set up the communication between the photoelectric multiplexing equipment; The link detecting switch unit detects the whether proper communication of current link, if connection normal then that keep current link; If undesired, then select the communication between another link establishment photoelectric multiplexing equipment.
For realizing above goal of the invention, further embodiment of this invention provides a kind of link redundancy backup system based on photoelectric multiplexing port, and said system comprises photoelectric multiplexing equipment; Said photoelectric multiplexing equipment is connected the cable of photoelectric multiplexing port and optical fiber respectively as primary link and backup link the electricity mouthful and the light mouth of different opposite equip.s; Said photoelectric multiplexing equipment comprises: mode of operation is provided with the unit, and the mode of operation of the photoelectric multiplexing port of said photoelectric multiplexing equipment is set; The communication link negotiation element, detect with said mode of operation link corresponding whether available, if available then communicating by letter through this link establishment photoelectric multiplexing equipment and opposite equip.; If unavailable, then change said mode of operation and detection again; The link detecting switch unit, whether normal, if connection normal then that keep current link if detecting current communication link; If undesired, then select the communication between said photoelectric multiplexing equipment of another link establishment and the opposite equip..
The present invention uses photoelectric multiplexing effected link redundancy backup; Do not need simultaneously extra port resource; Other pairs up link redundancy backup scheme the invention provides more succinct allocation plan, topological convergence property faster relatively; Can reach and flow is switched on the backup link fast in the 50ms, improve the professional ability of backing up in realtime greatly.
Description of drawings
Fig. 1 is the system diagram of a kind of general up redundancy backup of realization dual link in the prior art;
Fig. 2 is a kind of network topological diagram of the embodiment of the invention 1;
Fig. 3 is the functional block diagram of the embodiment of the invention 1 photoelectric multiplexing equipment 30;
Fig. 4 is the embodiment of the invention 1 a photoelectric multiplexing port mode of operation sketch map;
Fig. 5 carries out the flow chart of link redundancy backup for the embodiment of the invention 1;
Fig. 6 is the annexation sketch map of the embodiment of the invention 2;
Fig. 7 is the functional block diagram of the photoelectric multiplexing equipment 70 of the embodiment of the invention 2;
Fig. 8 is the graphical examples of 2 two periodic functions of the embodiment of the invention;
Fig. 9 is that 2 two photoelectric multiplexing ports of the embodiment of the invention are carried out functional digraph in same starting point;
Figure when Figure 10 differs 3T for 2 two photoelectric multiplexing ports execution of embodiment of the invention function starting point;
Figure 11 carries out functional digraph for the embodiment of the invention 2 two ports when power mode breaks down;
Figure 12 carries out the flow chart of link redundancy backup for the embodiment of the invention 2.
Embodiment
For making the object of the invention, technical scheme and advantage clearer,, the present invention is explained further details below in conjunction with execution mode and accompanying drawing.At this, exemplary embodiment of the present invention and explanation thereof are used to explain the present invention, but not as to qualification of the present invention.
Embodiment 1:
Fig. 2 is a kind of network topological diagram of present embodiment.Present embodiment is that example describes with the switch, and the communication equipment in the real network generally can use technical scheme of the present invention to carry out link backup when carrying out transfer of data.The switch of present embodiment possesses photoelectric multiplexing port, through with the cable of photoelectric multiplexing port and optical fiber respectively as the electricity of primary link and backup link peer end of the connection equipment mouthful and light mouth, with the redundancy backup of realization link.Photoelectric multiplexing port both can connect optical fiber also can stube cable, can also connect optical fiber and cable simultaneously, but can only be in a kind of mode of operation at one time.The user can select to make it be operated in optical mode or power mode through configuration order.Port is communicated by letter with the opposite end through optical fiber during the selective light pattern, and port is communicated by letter with the opposite end through cable when selecting power mode.
Shown in 2 figure, the switch A of present embodiment is connected switch C and D with photoelectric multiplexing port respectively with B, and A and B provide the photoelectric multiplexing mouth, and C then provides electricity mouth and the light mouth that separates with D.In one embodiment, A adopts the photoelectric multiplexing mouth to connect the electricity mouth of C and the light mouth of D; B adopts the photoelectric multiplexing mouth to connect the light mouth of C and the electricity mouth of D.Under the normal condition; Launch electricity mouthful (light mouth) as primary link; When electricity mouthful (a light mouth) broke down disconnection, the mode of operation with port switched to light mouth (electric mouthful) automatically, and switch A and B only need a photoelectric multiplexing port can realize pair up redundant links like this.
Fig. 3 is the functional block diagram of present embodiment photoelectric multiplexing equipment 30 (like the switch A among Fig. 2, B).As shown in the figure, for the function of the link redundancy backup of realizing photoelectric multiplexing port, this photoelectric multiplexing equipment comprises: mode of operation is provided with unit 301, and the mode of operation of the photoelectric multiplexing port of said photoelectric multiplexing equipment is set; Communication link negotiation element 302, detect with said mode of operation link corresponding whether available, if available then communicating by letter through this link establishment photoelectric multiplexing equipment and opposite equip.; If unavailable, then change said mode of operation and detection again; Link detecting switch unit 303, whether normal, if connection normal then that keep current link if detecting current communication link; If undesired, then select the communication between said photoelectric multiplexing equipment of another link establishment and the opposite equip..
Fig. 4 is a present embodiment photoelectric multiplexing port mode of operation sketch map, and its empty lattice represent that electrical transmission, grey lattice represent optical transmission.In a preferred embodiments; When system powers on; Mode of operation is provided with unit 301 mode of operations and is set to transition back and forth (as shown in Figure 4) between optical transmission mode and electrical transmission pattern, and this conversion can be set the cycle of a conversion, also can not have the cycle of regular length; But same mode of operation is wanted retention time T at least, and this time T is hardware check communication normal needed time whether.
Suppose that the opposite equip. (like switch C, the D among Fig. 2) that is connected with photoelectric multiplexing equipment 30 has sequencing on starting; And it is ready when mode of operation becomes the electrical transmission pattern, just to detect cable link (like the switch C among Fig. 2), then adopts cable link to set up communication as primary link.Because mode of operation is set to the mode of cycle alternation, no matter is that cable or optical fiber are ready, can be checked through connection and selects a kind of the connection.When the photoelectric multiplexing port of switch A adopts cable link to be connected with switch C to break down; Photoelectric multiplexing port is an optical transmission mode with working mode change; Owing to have optical fiber link between switch A and the D; Can in time T, detect, and this optical fiber link is transmitted as backup link.
Also have a kind of special situation to be exactly; If the optical fiber link between switch A and the D can not be used; So the mode of operation of present embodiment be provided with the unit will be once more transformation working pattern be whether the electrical transmission pattern available with the detection streamer link, mode of operation was provided with the mode that unit 301 still can be employed in transition back and forth between optical transmission mode and the electrical transmission pattern and carried out the detection of link this moment.
Therefore; Mode of operation in the present embodiment is provided with the unit mode of operation and is set between optical transmission mode and electrical transmission pattern transition back and forth and not only can confirms the link of a transmission at the beginning, and also can transfer to fast on the available link after in transmission course, breaking down.The setting of this mode of operation transition back and forth is merely a kind of preferred embodiments of present embodiment; Can preestablish a kind of mode of operation in the reality and wait until with setting up again after this mode of operation link corresponding is ready and communicate by letter; After breaking down, then being directly switch into another link gets final product; Can wait for this link-recovery if another link is also unavailable, and can not switch to original out of order link once more, perhaps stop this time connecting and begin new connection and set up process.
Fig. 5 carries out the flow chart of link redundancy backup for present embodiment.As shown in the figure:
Step S501 is connected the cable of the photoelectric multiplexing port of local terminal equipment and optical fiber respectively as primary link and backup link the electricity mouthful and the light mouth of different opposite equip.s.
Step S502 is provided with the mode of operation of the photoelectric multiplexing port of local terminal equipment, and present embodiment can mode of operation be set between electrical transmission and optical transmission, carry out transition back and forth at initial phase, to confirm a communication link as early as possible.
Whether step S503 detects with the mode of operation link corresponding that is provided with available.Because therefore the situation that uncontrollable opposite equip. starts needs to detect back and forth the link whether coupling is arranged and exists.If have then get into step S504, if not then continue step S502.
Step S504 adopts with the foundation of mode of operation link corresponding and communicates by letter.
Step S505, whether detect current communication link normal, if connection normal then that keep current link, if undesired then get into step S506.
Step S506 changes mode of operation, switches to another backup link and sets up communication.
Embodiment 2:
Fig. 6 is the annexation sketch map of present embodiment.As shown in the figure, present embodiment is considered the mode of another kind of link redundancy backup.Port F and port G are photoelectric multiplexing port, between photoelectric multiplexing equipment, adopt the cable of photoelectric multiplexing port to be connected with backup link as primary link with optical fiber.
Fig. 7 is the functional block diagram of the photoelectric multiplexing equipment 70 of present embodiment.As shown in Figure 7, photoelectric multiplexing equipment 70 comprises: mode of operation is provided with unit 701, and the mode of operation of the photoelectric multiplexing port of said photoelectric multiplexing equipment is set, and makes the photoelectric multiplexing equipment that is connected in altogether with the period, have identical mode of operation; Communication link negotiation element 702, the mode of operation of the photoelectric multiplexing equipment that detection is connected when detecting identical mode of operation, selects the mode of operation link corresponding identical with this to set up the communication between the photoelectric multiplexing equipment; Link detecting switch unit 703 detects the whether proper communication of current link, if connection normal then that keep current link; If undesired, then select the communication between another link establishment photoelectric multiplexing equipment.
Owing to be that two photoelectric multiplexing interfaces connect in the present embodiment,, two equipment just can establish a communications link when adopting identical mode of operation.Therefore, the mode of operation of present embodiment is provided with unit 701 and need mode of operation be set to: make the photoelectric multiplexing equipment that is connected in altogether with the period, have identical mode of operation.Can confirm that at the very start a link sets up communication like this.And, when finding that a link breaks off, can automatic transformation working pattern and switch to another reserve link.Below provide a concrete example and specify the concrete mode of operation set-up mode that present embodiment adopts, and how to realize what link redundancy switched.
Present embodiment adopts following two periodic function f
1(x), f
2(x) mode of operation of photoelectric multiplexing port is set, wherein:
Fig. 8 is the graphical examples of these two periodic functions.Blank lattice representative function value gets 1, the electrical transmission pattern; Grey lattice representative function value gets 0, optical transmission mode.K is for can be by 8 natural numbers of dividing exactly, and period of a function is 8T, and wherein T is hardware check communication normal needed time whether.
The operation principle of present embodiment is: when system initialization, the mode of operation of port F, G is provided with the employing function f
1(x); When port becomes when breaking off from power mode, system can find to connect breaks off and adopts function f
2(x) mode of operation to port is provided with; When port becomes when breaking off from optical mode, system can find to connect breaks off and adopts function f
1(x) mode of operation to port is provided with.Arrive communication just often when systems inspection, stop the execution of function, the mode of operation before promptly keeping.The proof set-up mode that adopts above mode of operation no matter can both proper communication under which kind of situation below:
(1) during the system just initialization, the function that two ports are selected all is f
1(x).The starting point of carrying out these functions when two ports is (promptly two system's power-on times are different) not simultaneously, and no matter how translation (the starting point difference that expression is carried out) of two functions can both make these two ports be in same mode of operation in T time period at least.
For example; Fig. 9 is that these two ports of expression are to begin to carry out function in same starting point; So can [kT, (k+3) T) this 3T makes photoelectric multiplexing port be in identical power mode in the time period, normal if the cable of these two ports connects; Pass through this 3T time so, necessarily can be checked through and set up communication through cable.If the optical fiber of these two ports connects normal, [(k+3) T, k+4) T) be in identical optical mode in this time period, also necessarily can be checked through and set up communication through optical fiber.
Again for example; Figure 10 is for port F shifts to an earlier date the sketch map that 3T time carries out than port G, can find that port F and G are in blank lattice after port G execution T time; After port G carries out 3T time; Port F and G are in the grey lattice, and so no matter port F is to adopt what mode to be connected with G, also can be checked through identical mode of operation and set up communication.Other situation can be done similar analysis, because these two functions all are periodic functions, as long as exhaustive in one-period.
(2) if port becomes fault by optical mode, at this moment two ports are all carried out function f
1(x), with reference to figure 9 can find [0, be set to be operated in power mode in T), if system has cable to connect, in T time, necessarily can be checked through identical mode of operation so.
(3) if port is to become fault by power mode, at this moment two ports are all carried out function f
2(x), disposition is shown in figure 11: can find system [0, be set to be operated in optical mode in T), if system has optical fiber to connect, in T time, necessarily can be checked through so.
Need to prove that the switching controls when present embodiment adopts above two periodic functions to the setting of mode of operation and fault recovery only is used to explain the present invention, and be not used in the present invention is limited.Can also adopt multiple mode to carry out this setting in the reality, the condition that needs to satisfy is: make the photoelectric multiplexing equipment that is connected in altogether with the period, have identical mode of operation, and the link switchover time is shortened.
Adopt technical scheme of the present invention, can recovered failure in the time T of link check, the link failure recovery time is fast.Because whether normal T represent the hardware check communication time, this time is generally all very short, can be lower than 50ms, can also adjust in actual use, so the present invention provides better support to the real-time recovery of business.And, do not need to learn once more forwarding-table items such as mac address table because the present invention has reduced the port of realizing redundancy backup yet.This photoelectric multiplexing automatic switching method not only can be realized through software, can also realize this through hardware, so that support photoelectric multiplexing to automatically switch.
Figure 12 carries out the flow chart of link redundancy backup for present embodiment adopts photoelectric multiplexing port.As shown in the figure:
Step S1201 is connected as primary link the cable and the optical fiber of the photoelectric multiplexing port of local terminal equipment the photoelectric multiplexing port of same opposite equip. with backup link.
Step S1202 is provided with the mode of operation of the photoelectric multiplexing port of local terminal equipment and opposite equip., makes local terminal equipment in altogether with the period, have identical mode of operation with opposite equip..This mode of operation can adopt multiple mode to be provided with, as long as can satisfy above requirement.
Step S1203, the mode of operation of detection local terminal equipment and opposite equip..
Does step S1204 judge whether the mode of operation of local terminal equipment and opposite equip. identical?
If step S1205 identical, then adopt the mode of operation link corresponding identical with this to set up and communicates by letter, if difference then continue detection.
Step S1206, whether detect current communication link normal? If connection normal then that keep current link.
If step S1207 is undesired then switch to another link establishment communication.
The present invention uses photoelectric multiplexing effected link redundancy backup; Do not need simultaneously extra port resource; Other pairs up link redundancy backup scheme the invention provides more succinct allocation plan, topological convergence property faster relatively; Can reach and flow is switched on the backup link fast in the 50ms, improve the professional ability of backing up in realtime greatly.
Above-described embodiment; The object of the invention, technical scheme and beneficial effect have been carried out further explain, and institute it should be understood that the above is merely embodiment of the present invention; And be not used in qualification protection scope of the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the link redundancy backup method based on photoelectric multiplexing port is characterized in that, said method comprises:
With the cable of the photoelectric multiplexing port of local terminal equipment and optical fiber as primary link and backup link peer end of the connection equipment;
The mode of operation of the photoelectric multiplexing port of local terminal equipment is set, is set between electrical transmission and optical transmission, carry out transition back and forth, select to have the link establishment local terminal equipment of identical mode of operation and communicating by letter of opposite equip. in the starting stage mode of operation;
Whether normal, if connection normal then that keep current link if detecting current communication link; If undesired, then switch the mode of operation of said local terminal equipment, and select communicating by letter of another link establishment local terminal equipment and opposite equip..
2. method according to claim 1 is characterized in that, the cable of the photoelectric multiplexing port of local terminal equipment and optical fiber as primary link and backup link peer end of the connection equipment, being comprised:
The photoelectric multiplexing port that the cable of the photoelectric multiplexing port of local terminal equipment and optical fiber is connected same opposite equip. as primary link with backup link.
3. method according to claim 2 is characterized in that, selects to have the link establishment local terminal equipment of identical mode of operation and communicating by letter of opposite equip., comprising:
Detect the mode of operation of the photoelectric multiplexing port of opposite equip., when the mode of operation that detects opposite equip. and local terminal equipment is identical, select communicating by letter of this identical mode of operation pairing link establishment local terminal equipment and opposite equip..
4. method according to claim 3 is characterized in that, said method also comprises:
The mode of operation of opposite equip. photoelectric multiplexing port is set, makes local terminal equipment in altogether with the period, have identical mode of operation with opposite equip., the said common period is carried out the required time of hardware detection more than or equal to said local terminal equipment and opposite equip..
5. method according to claim 4 is characterized in that, the mode of operation of local terminal equipment photoelectric multiplexing port is set, and the mode of operation that the opposite equip. photoelectric multiplexing port is set, and comprising:
The photoelectric multiplexing port of local terminal equipment and the photoelectric multiplexing port of opposite equip. are set between optical transmission mode and electrical transmission pattern, carry out periodicity alternately.
6. method according to claim 1 is characterized in that, the cable of the photoelectric multiplexing port of local terminal equipment and optical fiber as primary link and backup link peer end of the connection equipment, are also comprised:
The electricity mouthful and the light mouth that the cable of the photoelectric multiplexing port of local terminal equipment and optical fiber are connected different opposite equip.s as primary link and backup link respectively.
7. method according to claim 6 is characterized in that, selects to have the link establishment local terminal equipment of identical mode of operation and communicating by letter of opposite equip., comprising:
Detect with the mode of operation link corresponding of local terminal equipment whether available, if available then,, then switch said mode of operation and detection again if unavailable through the communicating by letter of this link establishment local terminal equipment and opposite equip..
8. the link redundancy backup system based on photoelectric multiplexing port is characterized in that said system comprises photoelectric multiplexing equipment, adopts the cable of photoelectric multiplexing port to be connected with backup link as primary link with optical fiber between the said photoelectric multiplexing equipment; Said photoelectric multiplexing equipment comprises:
Mode of operation is provided with the unit; The mode of operation of the photoelectric multiplexing port of said photoelectric multiplexing equipment is set; Be set between electrical transmission and optical transmission, carry out transition back and forth in the starting stage mode of operation, make the photoelectric multiplexing equipment that is connected in altogether with the period, have identical mode of operation;
The communication link negotiation element, the mode of operation of the photoelectric multiplexing equipment that detection is connected when detecting identical mode of operation, selects the mode of operation link corresponding identical with this to set up the communication between the photoelectric multiplexing equipment;
The link detecting switch unit detects the whether proper communication of current link, if connection normal then that keep current link; If undesired, then select the communication between another link establishment photoelectric multiplexing equipment.
9. system according to claim 8 is characterized in that, said mode of operation is provided with the unit and comprises:
Circulation pattern is provided with the unit, and the mode of operation of the photoelectric multiplexing port of said photoelectric multiplexing equipment is set between optical transmission mode and electrical transmission pattern, carry out periodicity alternately.
10. the link redundancy backup system based on photoelectric multiplexing port is characterized in that said system comprises photoelectric multiplexing equipment; Said photoelectric multiplexing equipment is connected the cable of photoelectric multiplexing port and optical fiber respectively as primary link and backup link the electricity mouthful and the light mouth of different opposite equip.s; Said photoelectric multiplexing equipment comprises:
Mode of operation is provided with the unit, and the mode of operation of the photoelectric multiplexing port of said photoelectric multiplexing equipment is set, and is set between electrical transmission and optical transmission, carry out transition back and forth in the starting stage mode of operation;
The communication link negotiation element, detect with said mode of operation link corresponding whether available, if available then communicating by letter through this link establishment photoelectric multiplexing equipment and opposite equip.; If unavailable, then change said mode of operation and detection again;
The link detecting switch unit, whether normal, if connection normal then that keep current link if detecting current communication link; If undesired, then select the communication between said photoelectric multiplexing equipment of another link establishment and the opposite equip..
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| CN102104397B (en) * | 2009-12-22 | 2013-09-11 | 华为技术有限公司 | Link protection method and device |
| CN101867409B (en) * | 2010-06-04 | 2013-08-14 | 西安电子科技大学 | Link switching control device and switching method in hybrid atmospheric laser communication system |
| CN106487679B (en) * | 2015-09-02 | 2019-11-08 | 北京国基科技股份有限公司 | The active-standby switch system and switching method of Ethernet switch |
| CN106101032B (en) * | 2016-08-11 | 2020-02-04 | 迈普通信技术股份有限公司 | Method and device for COMBO interface self-adaptive Ethernet interface |
| JP6760855B2 (en) * | 2017-01-17 | 2020-09-23 | アズビル株式会社 | Transmission line switching device and method |
| CN109889378A (en) * | 2019-01-30 | 2019-06-14 | 郑州云海信息技术有限公司 | A kind of interface equipment and communication means promoting network communication reliability |
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| CN1725762A (en) * | 2004-07-23 | 2006-01-25 | 杭州华为三康技术有限公司 | Implementation method of Ethernet photoelectric interface duplex |
| CN1777086A (en) * | 2005-12-15 | 2006-05-24 | 杭州华为三康技术有限公司 | Optronic multiplex interface state indicating device and method and its inferface |
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