CN103457749A - Method for restraining multicast flooding in intelligent substation - Google Patents
Method for restraining multicast flooding in intelligent substation Download PDFInfo
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- CN103457749A CN103457749A CN2013103844214A CN201310384421A CN103457749A CN 103457749 A CN103457749 A CN 103457749A CN 2013103844214 A CN2013103844214 A CN 2013103844214A CN 201310384421 A CN201310384421 A CN 201310384421A CN 103457749 A CN103457749 A CN 103457749A
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Abstract
The invention relates to a method for restraining multicast flooding in an intelligent substation. The method comprises the following steps: (1) an intelligent device connected to a switch in a station level of the substation is determined; (2) the type of a service message of the intelligent device is determined; (3) a port which is needed for forwarding the message is determined; (4) a multicast group is created on the switch. According to the method, a static multicast creating method is adopted; due to the fact that the message forwarding port is determined in the switch, multicast flooding in the intelligent substation, particularly in a process level network can be effectively restrained, the network utilization rate is increased, and the real-time performance of service is ensured. Compared with a dynamic multicast technology, the static multicast method can lower the complexity and cost of the intelligent device and the switch and improve the reliability of a system. The multicast flooding is restrained by means of partitioning a VLAN, so that configuration is easy to operate and quite convenient to realize. The static multicast method can effectively overcome the limitation.
Description
Technical field
The invention belongs to power communication system, specifically relate in a kind of intelligent substation and suppress the method that multicast floods.
Background technology
The information layered concept of electric substation automation system that intelligent substation adopts IEC61850 to propose, be divided into three levels by transformer station: station level, wall, process layer.Wherein process layer mainly comprises GOOSE and two kinds of messages of SV.The data message that the GOOSE message transmits mainly comprises position signalling, status signal and the control signal between block signal, wall and the process layer between wall, higher to real-time and reliability requirement.The information of sampling message transmissions is the sampled data of process layer to wall, this class message real-time performance requires high. and SV and the GOOSE message in process-level network is all Layer 2 Multicast messages at present, the general processing mode of this kind of message in industrial ethernet switch is, if there is not the corresponding port mapping relation of this multicast message destination address in the switch address table, to all of the port except input port in same VLAN on this switch, forwarded the SV sent due to every merge cells
Message flow is all very large, intelligent apparatus on the SV network switch all can be received a large amount of irrelevant SV messages, the network bandwidth can be by serious waste like this, intelligent apparatus can be received serious impact, especially in the situation of SV and GOOSE mixed networking, the GOOSE message is not in the situation that have the priority treatment measure serious to stop up, and real-time can not get ensureing, the reliability of entail dangers to system and fail safe.
Also have some Layer 2 Multicast business in Access Network EPON system in electric power system at present, the phenomenon that exists some multicasts to flood, affected the communication of regular traffic.
Current have adopt the dynamic multicast technology to suppress that multicast floods, but this technology strictly do not checked at present, and can increase complexity and the cost of intelligent apparatus and switch, reduce the reliability of system.Adopt in addition VLAN to suppress that multicast floods, because some switch can not be realized the technology that VLAN occurs simultaneously, there are strict requirements to the operation of VLAN to also have some engineering sites, and this kind of method has certain limitation.
Summary of the invention
For the deficiencies in the prior art, the invention provides in a kind of intelligent substation and suppress the method that multicast floods.For solving the phenomenon that in intelligent substation, in communication network, multicast floods, what especially in process-level network, SV and GOOSE message caused each network-termination device has a strong impact on, destination address according to multicast message, create static multicast groups in industrial ethernet switch, mapping relations at this multicast address of the middle formation of transmitting of switch and port, after this SV or GOOSE message enter switch, switch is according to these mapping relations, from several ports of appointment, this message repeating is gone out, rather than to each port repeat on this switch, thereby saved the network bandwidth, prevented network congestion, especially alleviate the load of the individual terminal installation on network.The method also can be for the EPON system of Access Network.
The objective of the invention is to adopt following technical proposals to realize:
Suppress the method that multicast floods in a kind of intelligent substation, it is characterized in that, described method comprises:
(1) confirm on the station level switch, to connect in transformer station smart machine;
(2) confirm the service message type of this smart machine;
(3) determine the port that this message need to forward;
(4) create a multicast on this switch.
Preferably, described step (1) comprises according to network design scheme and business demand, determines the physical connection of smart machine on this switch, and the destination of message transmission.
Preferably, described step (2) comprises the multicast message of confirming that this each device will send, checks the purpose mac address of the message that smart machine sends.
Preferably, described step (2) comprises that last bit according to this address the first byte, for whether being 1, confirms the legitimacy of this multicast.
Preferably, described step (3) comprises the flow direction according to this multicast service, determines the destination device that this message will send, and then determines the destination interface of this message on switch.
Preferably, described step (4) comprises a static multicast of establishment, increases mapping relations in the address table of switch, and the mac address is this multicast address, and port is step (3) middle port, checks address table, confirms whether this multicast address correctly adds.
Preferably, described step (4) comprises after this multicast message enters switch, exchange opportunity inquire address table, and the port that finds this multicast address to shine upon, this multicast message can be gone out from these port repeats.
Preferably, described method comprises adds other multicast address on this TV station switch in the address table on this switch to, and all multicasts on this TV station switch can not flooded.
Preferably, described method comprises also divides static multicast by other switch of station level, makes on whole station level network and does not have multicast to flood.
Compared with the prior art, beneficial effect of the present invention is:
1, adopt the method that creates static multicast, add the mapping relations of static address and port in the mac address table of switch, thereby determine the port that multicast message forwards in switch, can effectively suppress in intelligent substation, especially the multicast in process-level network floods, increase network utilization, ensure the real-time of business.
The method of the establishment static multicasting that 2, the present invention adopts, than the dynamic multicast technology, only need on switch, do simple configuration, and need to be on smart machine operation state multicast protocol and do complicated configuration, can reduce complexity and the cost of smart machine and switch, thereby improve the reliability of smart machine and switch, and then improve the reliability of whole network system.
3, contrast suppresses multicast and floods by dividing VLAN, because the VLAN of some business divides the function that is limited to switch, and on-the-spot engineering-environment, and the static multicast technology is the basic function of switch, configuration operation is simple, implement easily, the method for the static multicasting that the present invention proposes can effectively solve above-mentioned limitation.
The accompanying drawing explanation
Fig. 1 suppresses the method flow diagram that multicast floods in a kind of intelligent substation provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
1, the smart machine that a deterministic process layer industrial ethernet switch will connect, according to network design scheme and business demand, determine the physical connection port of all smart machines on this switch, and confirm the communication service between these smart machines.
2, confirm the type of message that this each device will send, and check all messages that each smart machine sends purpose mac address whether be multicast address, according to last bit of this address the first byte for whether being 1,1 is multicast message otherwise for clean culture if, as 01-0c-cd-11-22-33 is multicast, and 02-0c-cd-11-22-33 is clean culture.
3, according to the flow direction of each multicast service of each smart machine, determine the destination device that this message will send, and then determine the destination interface of this message on switch, thereby can set up the mapping relations of this smart machine place port and multicast message destination interface.And then set up the mapping relations of all smart machines and its destination interface.
4, by the management software of exchange, create a static multicast, increase mapping relations in the address table of switch, the mac address is this multicast address, port is the purpose mapped port of mentioning in 3, checks address table, confirms whether this multicast address correctly adds.After this multicast message enters switch, exchange opportunity inquire address table, the port that finds this multicast address to shine upon, this multicast message can be gone out from these port repeats.
5, create corresponding static multicast according to other all multicast messages on this TV station switch, and add in the address table on this switch, check errorless rear preservation, the multicast message of all like this smart machines all can be from the output of the switch ports themselves of appointment, and can not flooded to all of the port on switch.
6, other switch of process layer is also created to static multicast, if multicast message needs switch-spanning output, the cascade port of switch is joined in this multicast group and goes, create multicast group simultaneously on the distant-end switch of cascade, destination interface is added in this multicast group and goes, like this by create static multicast on many cascaded switches simultaneously, can be so that do not have multicast to flood on whole process-level network.
Embodiment
Connect merge cells on the process layer switch; intelligent terminal; each of observing and controlling and protection; the switch ports themselves connected is fe0, fe1, fe2 and fe3; the sampling value message that merge cells sends need to send on observing and controlling and protective device, and the goose message that intelligent terminal sends need to send on protective device.Sampling value message is multicast message, and destination address is 01-0C-CD-04-00-00, in order to prevent this sampling value message, on switch, floods, and creates multicast group on switch, and address is 01-0C-CD-04-00-00, and comprising port is fe0, fe2 and fe3.The Goose message is also multicast message, and destination address is 01-0C-CD-01-00-d9, in order to prevent this goose message, on switch, floods, and creates multicast group on switch, and address is 01-0C-CD-01-00-d9, and comprising port is fe1 and fe3.Configured rear preservation.Can suppress above-mentioned two kinds of multicast messages flooding on network by above-mentioned configuration.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment, the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement the specific embodiment of the present invention, and do not break away from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of claim scope of the present invention.
Claims (9)
1. suppress the method that multicast floods in an intelligent substation, it is characterized in that, described method comprises:
(1) smart machine connected on the station level switch in confirmation transformer station;
(2) confirm the service message type of this smart machine;
(3) determine the port that this message need to forward;
(4) create a multicast group on this switch.
2. suppress the method that multicast floods in a kind of intelligent substation as claimed in claim 1, it is characterized in that, described step (1) comprises according to network design scheme and business demand, determines the physical connection of smart machine on this switch, and the destination of message transmission.
3. suppress the method that multicast floods in a kind of intelligent substation as claimed in claim 1, it is characterized in that, described step (2) comprises the multicast message of confirming that this each device will send, checks the purpose mac address of the message that smart machine sends.
4. suppress the method that multicast floods in a kind of intelligent substation as claimed in claim 1, it is characterized in that, described step (2) comprises that last bit according to this address the first byte, for whether being 1, confirms the legitimacy of this multicast.
5. suppress the method that multicast floods in a kind of intelligent substation as claimed in claim 1, it is characterized in that, described step (3) comprises the flow direction according to this multicast service, determines the destination device that this message will send, and then determines the destination interface of this message on switch.
6. suppress the method that multicast floods in a kind of intelligent substation as claimed in claim 1, it is characterized in that, described step (4) comprises a static multicast of establishment, increase mapping relations in the address table of switch, the mac address is this multicast address, port is step (3) middle port, checks address table, confirms whether this multicast address correctly adds.
7. suppress the method that multicast floods in a kind of intelligent substation as claimed in claim 1, it is characterized in that, described step (4) comprises after this multicast message enters switch, exchange opportunity inquire address table, find the port of this multicast address mapping, this multicast message can be gone out from these port repeats.
8. suppress the method that multicast floods in a kind of intelligent substation as claimed in claim 7, it is characterized in that, described method comprises adds other multicast address on this TV station switch in the address table on this switch to, and all multicasts on this TV station switch can not flooded.
9. suppress the method that multicast floods in a kind of intelligent substation as claimed in claim 7, it is characterized in that, described method comprises also divides static multicast by other switch of station level, makes on whole station level network and does not have multicast to flood.
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| CN103763196A (en) * | 2014-01-27 | 2014-04-30 | 杭州华三通信技术有限公司 | Method and device for processing multicast source filtering entry |
| CN104125032A (en) * | 2014-06-30 | 2014-10-29 | 广州供电局有限公司 | SDH (Synchronous Digital Hierarchy) based wide-area peer-to-peer communication system and method |
| CN105306363A (en) * | 2015-09-21 | 2016-02-03 | 苏忠阳 | Method and device for exchanging substation communication network |
| CN106954193A (en) * | 2017-03-27 | 2017-07-14 | 上海斐讯数据通信技术有限公司 | A kind of WIFI equipment downlink broadcast messages suppressing method and its device |
| CN109510770A (en) * | 2018-12-07 | 2019-03-22 | 北京金山云网络技术有限公司 | Information synchronization method, device and processing equipment between load balancing node |
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| CN103763196A (en) * | 2014-01-27 | 2014-04-30 | 杭州华三通信技术有限公司 | Method and device for processing multicast source filtering entry |
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| CN104125032A (en) * | 2014-06-30 | 2014-10-29 | 广州供电局有限公司 | SDH (Synchronous Digital Hierarchy) based wide-area peer-to-peer communication system and method |
| CN104125032B (en) * | 2014-06-30 | 2017-02-15 | 广州供电局有限公司 | SDH (Synchronous Digital Hierarchy) based wide-area peer-to-peer communication system and method |
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| CN105306363B (en) * | 2015-09-21 | 2018-10-23 | 苏忠阳 | A kind of exchange method and device of substation communication network |
| CN106954193A (en) * | 2017-03-27 | 2017-07-14 | 上海斐讯数据通信技术有限公司 | A kind of WIFI equipment downlink broadcast messages suppressing method and its device |
| CN106954193B (en) * | 2017-03-27 | 2020-11-10 | 台州市吉吉知识产权运营有限公司 | Method and device for inhibiting downlink broadcast messages of WIFI equipment |
| CN109510770A (en) * | 2018-12-07 | 2019-03-22 | 北京金山云网络技术有限公司 | Information synchronization method, device and processing equipment between load balancing node |
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Effective date of registration: 20160425 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation of China Applicant after: China Electric Power Research Institute Applicant after: State Grid Smart Grid Institute Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation of China Applicant before: China Electric Power Research Institute |
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Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation of China Applicant after: China Electric Power Research Institute Applicant after: GLOBAL ENERGY INTERCONNECTION RESEARCH INSTITUTE Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation of China Applicant before: China Electric Power Research Institute Applicant before: State Grid Smart Grid Institute |
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Application publication date: 20131218 |