CN105207824A - SDN based automatic protection switching system and method - Google Patents
SDN based automatic protection switching system and method Download PDFInfo
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- CN105207824A CN105207824A CN201510677477.8A CN201510677477A CN105207824A CN 105207824 A CN105207824 A CN 105207824A CN 201510677477 A CN201510677477 A CN 201510677477A CN 105207824 A CN105207824 A CN 105207824A
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Abstract
The invention discloses an SDN based automatic protection switching system and method. The SDN based automatic protection switching system comprises an SDN controller and a plurality of switches arranged on a main path and a standby path respectively; the SDN controller is connected with the switches. The SDN based automatic protection switching method comprises the following steps: configuring a main operating path and a standby operating path; starting the automatic switching function of a protective system; judging whether the main path works normally or not, if yes, transmitting a packet from the main path; otherwise, adopting the SDN controller to package a free ARP packet and send the free ARP packet to the switch on the standby path; adopting the switch to send the free ARP packet to a peer-end flow sender; modifying next hop according to the free ARP packet by the flow sender; automatically switching the operating path to the standby path, and regarding the standby path as a new operating path to transmit the packet. According to the invention, the network reliability is improved, the problem about network interruption due to a link failure is effectively avoided, and the SDN is helped to have the high reliability and service level of a carrier-grade network.
Description
Technical field
The present invention relates to network communication technology field, particularly relate to a kind of system and method thereof of the APS based on SDN.
Background technology
Software defined network (SoftwareDefinedNetwork, SDN), it is a kind of new network innovation framework, it is a kind of implementation of network virtualization, its core technology OpenFlow is by separating network equipment chain of command and data surface, thus achieve the flexible control of network traffics, make network become more intelligent as pipeline.
SDN, by control and forward separating, realizes centralized control by controller to whole net, realizes forwarding hardware generalization, controls intelligent centralization, greatly improves the innovation of network with flexible.But existing SDN technology mainly focuses on business network, do not consider how carrier class network uses SDN.APS is that SDN marches toward one of major issue that carrier class network needs to solve, if can not auto switching, network interruption, data message will be caused to lose.Due to the high reliability of carrier class network demand fulfillment 5 more than 9 grades, this can bring SLA service class not meet, poor user experience.
Therefore, it is possible to automatically carry out main-apparatus protection auto switching fast, be extremely important and necessary for SDN in the application of carrier class network.
Summary of the invention
Because the above-mentioned defect of prior art; technical problem to be solved by this invention is to provide a kind of system and method thereof of the APS based on SDN; poor with the SDN reliability control system solving prior art, the problem that after link occurs fault, network interruption and data message are lost.
For achieving the above object; the invention provides a kind of system of the APS based on SDN; it is characterized in that: comprise SDN controller and be separately positioned on the multiple switches on main path and standby path, described SDN controller is connected with multiple switch.
Based on a method for the APS of SDN, it is characterized in that, comprise the following steps:
S1, SDN controller configures main operating path;
S2, SDN controller configuration backup path;
The auto switching function of protection system enabled by S3, SDN controller;
S4, judge that main path work is whether normal, when main path is working properly, message forwards from main path;
S5, when main path fault, start gravity treatment operating path flow process;
S6, SDN controller encapsulates gratuitous ARP packet in the packet-out message of openflow, issues the switch of backup path;
Gratuitous ARP packet is transmitted to opposite end flow sender by S7, switch;
S8, flow sender revise down hop according to gratuitous ARP;
S9, operating path auto switching are to backup path, and backup path becomes new operating path;
S10, message are E-Packeted by new operating path.
The method of above-mentioned a kind of APS based on SDN, it is characterized in that, described step S4 judges that the whether normal method of main path work is specially: SDN controller starts timer, when it can receive the message of switch, then shows that main path is working properly; When SDN controller does not receive the message of main path switch yet after 3 cycle timer time-out, then think that main path breaks down.
The invention has the beneficial effects as follows:
The present invention is based on the automatic Protective Switching System for Optical of SDN while raising reliability; simplify the configuration of main frame; can still provide highly reliable operating path when certain switch breaks down by APS, effectively avoid the problem of network interruption after link occurs fault.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand object of the present invention, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is main path work structuring schematic diagram of the present invention;
Fig. 2 is that main path fault of the present invention is by gratuitous ARP amendment down hop work structuring schematic diagram;
Fig. 3 is auto switching backup path work structuring schematic diagram of the present invention;
Fig. 4 is overall workflow figure of the present invention.
Embodiment
As shown in Figure 1, 2, 3, a kind of system of the APS based on SDN, is characterized in that: comprise SDN controller 1 and be separately positioned on the multiple switches 2 on main path and standby path, described SDN controller 1 is connected with multiple switch 2.
As shown in Figure 1,2,3, 4, a kind of method of the APS based on SDN, is characterized in that, comprise the following steps:
S1, SDN controller configures main operating path;
S2, SDN controller configuration backup path;
The auto switching function of protection system enabled by S3, SDN controller;
S4, judge that main path work is whether normal, when main path is working properly, message forwards from main path;
S5, when main path fault, start gravity treatment operating path flow process;
S6, SDN controller encapsulates gratuitous ARP packet in the packet-out message of openflow, issues the switch of backup path;
Gratuitous ARP packet is transmitted to opposite end flow sender by S7, switch;
S8, flow sender revise down hop according to gratuitous ARP;
S9, operating path auto switching are to backup path, and backup path becomes new operating path;
S10, message are E-Packeted by new operating path.
In the present embodiment, described step S4 judges that the whether normal method of main path work is specially: SDN controller starts timer, when it can receive the message of switch, then shows that main path is working properly; When SDN controller does not receive the message of main path switch yet after 3 cycle timer time-out, then think that main path breaks down.
The system of SDN APS of the present invention improves network reliability by the switch protection auto switching of active-standby path, effectively avoids network interruption problem after link occurs fault, helps SDN to reach high reliability and the service level of carrier class network.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technical staff in the art, all should by the determined protection range of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (3)
1. the system based on the APS of SDN; it is characterized in that: comprise SDN controller (1) and be separately positioned on the multiple switches (2) on main path and standby path, described SDN controller (1) is connected with multiple switch (2).
2. based on a method for the APS of SDN, it is characterized in that, comprise the following steps:
S1, SDN controller configures main operating path;
S2, SDN controller configuration backup path;
The auto switching function of protection system enabled by S3, SDN controller;
S4, judge that main path work is whether normal, when main path is working properly, message forwards from main path;
S5, when main path fault, start gravity treatment operating path flow process;
S6, SDN controller encapsulates gratuitous ARP packet in the packet-out message of openflow, issues the switch of backup path;
Gratuitous ARP packet is transmitted to opposite end flow sender by S7, switch;
S8, flow sender revise down hop according to gratuitous ARP;
S9, operating path auto switching are to backup path, and backup path becomes new operating path;
S10, message are E-Packeted by new operating path.
3. the method for a kind of APS based on SDN as claimed in claim 2, it is characterized in that, described step S4 judges that the whether normal method of main path work is specially: SDN controller starts timer, when it can receive the message of switch, then shows that main path is working properly; When SDN controller does not receive the message of main path switch yet after 3 cycle timer time-out, then think that main path breaks down.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510677477.8A CN105207824A (en) | 2015-10-19 | 2015-10-19 | SDN based automatic protection switching system and method |
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| CN201510677477.8A CN105207824A (en) | 2015-10-19 | 2015-10-19 | SDN based automatic protection switching system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106027311A (en) * | 2016-06-24 | 2016-10-12 | 江苏省未来网络创新研究院 | SDN-based disaster recovery system and data disaster recovery method thereof |
| WO2017190579A1 (en) * | 2016-05-05 | 2017-11-09 | 中兴通讯股份有限公司 | Method for realizing protection switching in sdn architecture and forwarding device |
| CN107465611A (en) * | 2017-09-05 | 2017-12-12 | 北京东土科技股份有限公司 | The pretection switch method and device of SDN controllers and Switch control link |
| CN108306777A (en) * | 2018-04-20 | 2018-07-20 | 平安科技（深圳）有限公司 | Virtual gateway main/standby switching method and device based on SDN controllers |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017190579A1 (en) * | 2016-05-05 | 2017-11-09 | 中兴通讯股份有限公司 | Method for realizing protection switching in sdn architecture and forwarding device |
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| CN108306777A (en) * | 2018-04-20 | 2018-07-20 | 平安科技（深圳）有限公司 | Virtual gateway main/standby switching method and device based on SDN controllers |
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| CN108306777B (en) * | 2018-04-20 | 2021-04-13 | 平安科技（深圳）有限公司 | SDN controller-based virtual gateway active/standby switching method and device |
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