CN102857353B - Method for implementing proxy interception multicast - Google Patents
Method for implementing proxy interception multicast Download PDFInfo
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- CN102857353B CN102857353B CN201210388929.7A CN201210388929A CN102857353B CN 102857353 B CN102857353 B CN 102857353B CN 201210388929 A CN201210388929 A CN 201210388929A CN 102857353 B CN102857353 B CN 102857353B
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Abstract
The invention discloses a method for implementing proxy interception multicast. The method is applied to a process for implementing multicast by a passive optical network (PON) access system. The PON access system comprises an optical line terminal (OLT) main control disk and an OLT line clamp, wherein a module for running an internet group management protocol (IGMP)Proxy protocol is arranged on the OLT main control disk; a module for running an IGMPSnooping protocol is arranged on the OLT line clamp; a timer is involved; when the main control disk sends a query message of a multicast group, the timer is switched on and is used for setting time T; the state of the multicast group is set to be not received; if the message of the multicast group is received within the time T, the state of the multicast group is set to be received; and on the premise that the state of the multicast group is received, if the message of the multicast group is received again, a transferring table is only constructed on the OLT line clamp, and the message is not submitted to the OLT main control disk. By utilizing the method, the problem of massive report messages submitted to the main control disk is solved.
Description
Technical field
The present invention relates to PON system multicast mode, particularly relate to a kind of implementation method of proxy interception multicast.
Background technology
Passive optical-fiber network (PON, Passive Optical Network) also known as passive fiber network, be the one at optical-fibre communications networking, its characteristic is just can settling signal process without power supply, except terminal equipment needs to use except electricity, the node in the middle of it is then formed with optical fiber component.
A PON equipment comprises a central office node, be called light link terminal (OLT, Optical Line Terminal), one or more user node, be called optical network unit (ONUs) or Optical Network Terminal (ONTs), and one is called the separator of optical distributed network (ODN) between the two devices.The OLT device of current main flow is all made up of main control unit (active and standby) and line card (or being also called business dish or interface disc).
IGMP(Internet Group Management Protocol) agreement is the agreement being specifically designed to transport multicast business in a network, IGMP agreement runs on main frame and between the multicast router be directly connected with main frame, main frame is told local router to wish to add by this agreement and accepted the information of certain particular multicast group.
Network Layer 2 Multicast related protocol comprises IGMP Snooping(snoopy protocol) and IGMP Proxy(agency agreement), IGMP Snooping obtains relevant information by the message intercepting IGMP, the IGMP request that IGMP Proxy has then tackled terminal use is gone forward side by side after line correlation process, then it is transmitted to upper level router.
The multicast pattern of OLT device is combined mutually by the pattern of main control unit and the pattern of line card.If the pattern of the pattern of main control unit and line card is all IGMP Proxy pattern, occupying system resources is relatively many, and multicast forward table to set up speed slow; If the pattern of the pattern of main control unit and line card is all IGMP Snooping pattern, higher to device processes Capability Requirement above OLT; If the pattern of master control borad is IGMP Proxy, the pattern of line card is IGMP Snooping, for OLT device itself, when hanging a lot of ONU below equipment, there is the problem that master control deal with data amount is large, from a lot of report messages that line card is sent here, add the process load of master control.
Summary of the invention
The object of this invention is to provide a kind of implementation method of proxy interception multicast, more to solve above-mentioned occupying system resources, the speed of setting up of multicast forward table is slow, easily increases the problem of the process load of master control.
The object of the invention is to be achieved through the following technical solutions:
An implementation method for proxy interception multicast, is applied to PON connecting system and realizes in multicast procedures, and described PON connecting system comprises OLT main control unit and OLT line card, wherein:
Described OLT main control unit is provided with the module running IGMP Proxy agreement, and described OLT line card is provided with the module running IGMP Snooping agreement;
Set a timer;
When main control unit sends the query message of multicast group, opening timing device, setting-up time T, and the state of multicast group is set to does not receive;
If receive the report message of certain multicast group in time T after, set up or upgrade the multicast forward table of this group, record the state of this multicast group for receive, and the report message of this multicast group is transmitted to main control unit;
Under the state of this multicast group is set to paid-in prerequisite, if line card receives the report message of this multicast group again, just only set up at described OLT line card and transmit, and not by message up sending to described OLT main control unit.
The implementation method of above-mentioned proxy interception multicast, wherein, when described timer expiry, then deletes this timer.
The implementation method of above-mentioned proxy interception multicast, wherein, utilizes timer to complete the filtration of multicast protocol message.
The implementation method of above-mentioned proxy interception multicast, wherein, described PON connecting system is EPON connecting system or GPON connecting system.
Compared with the prior art, beneficial effect of the present invention is:
Decrease OLT main control unit message amount, reduce the process load of main control unit, decrease system resources consumption.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the implementation method of proxy interception multicast of the present invention.
Embodiment
Below in conjunction with schematic diagram and concrete operations embodiment, the invention will be further described.
Current PON system substantially all adopts IGMP Proxy/IGMP Snooping protocol for realizing multicast.As shown in Figure 1, the implementation method of proxy interception multicast of the present invention is applied to PON connecting system and realizes in multicast procedures, PON connecting system comprises OLT main control unit and OLT line card, OLT main control unit is provided with the module running IGMP Proxy agreement, and OLT line card is provided with the module running IGMP Snooping agreement.IGMP Proxy realizes principle: OLT sets up multicast table by the IGMP message between interception user and router, and the first line of a couplet port of Proxy equipment performs the role of main frame, and second line of a couplet port performs the role of router.IGMP Snooping realizes principle: OLT, to intercept the mode that main frame is sent to router IGMP Report Message, forms the corresponding relation of group membership and port, and according to this corresponding relation, the multicast packet received is forwarded to the port of group membership.
First, a timer is set.When master control sends the query message of multicast group, opening timing device.
Setting time-out time T, the time is set to maxResponseTime, is generally 10s.Now the initial condition of all multicast group is not for receive, and the state namely organized is set to report-not-receive.
Then, if receive the report message of certain multicast group in time T after, the state of this multicast group is set to and receives, and upper master control forwards the report message of this multicast group.
Under the state of this multicast group is set to paid-in prerequisite, and in time T, if again receive the report message of this multicast group, just only set up at OLT line card and transmit, and report message will not delivered to OLT main control unit.Because for OLT main control unit, the report message of the different members in line card in same group is identical, only uses and send portion to OLT main control unit.
When the timer times out, then delete this timer, and the state resetting all multicast group is not for receive report message state.The inventive method solves the problem sending master control report message too much.
In the specific embodiment of the invention, PON connecting system can be EPON or GPON connecting system.
Be described in detail specific embodiments of the invention above, but the present invention is not restricted to specific embodiment described above, it is just as example.To those skilled in the art, any equivalent modifications and substitute also all among category of the present invention.Therefore, equalization conversion done without departing from the spirit and scope of the invention and amendment, all should contain within the scope of the invention.
Claims (4)
1. an implementation method for proxy interception multicast, is applied to PON connecting system and realizes in multicast procedures, and described PON connecting system comprises OLT main control unit and OLT line card, it is characterized in that:
Described OLT main control unit is provided with the module running IGMP Proxy agreement, and described OLT line card is provided with the module running IGMP Snooping agreement;
Set a timer;
When main control unit sends the query message of multicast group, opening timing device, setting-up time T, and the state of multicast group is set to does not receive;
If receive the report message of certain multicast group in time T after, set up at described OLT line card or upgrade the multicast forward table of this group, recording the state of this multicast group for receive, and the report message of this multicast group is transmitted to main control unit;
Under the state of this multicast group is set to paid-in prerequisite, if line card receives the report message of this multicast group again, just only set up at described OLT line card and transmit, and not by message up sending to described OLT main control unit.
2. the implementation method of proxy interception multicast according to claim 1, is characterized in that, when described timer expiry, then delete this timer.
3. the implementation method of proxy interception multicast according to claim 2, is characterized in that, utilize timer to complete the filtration of multicast protocol message.
4. the implementation method of proxy interception multicast according to claim 3, it is characterized in that, described PON connecting system is EPON connecting system or GPON connecting system.
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| CN201210388929.7A CN102857353B (en) | 2012-10-15 | 2012-10-15 | Method for implementing proxy interception multicast |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103095472B (en) * | 2013-01-09 | 2018-02-13 | 上海斐讯数据通信技术有限公司 | A kind of method that travelling across VLAN multicast is realized under PON system |
| CN104426779B (en) * | 2013-08-23 | 2018-10-12 | 上海斐讯数据通信技术有限公司 | The implementation method of PON access systems and its multicast |
| CN103647720B (en) * | 2013-12-26 | 2017-04-26 | 迈普通信技术股份有限公司 | Method and device for processing internet group management protocol (IGMP) Snooping |
| CN104065494B (en) * | 2014-07-03 | 2017-12-01 | 上海斐讯数据通信技术有限公司 | A kind of rack OLT device and its method for realizing more M-VLAN |
| CN105119826B (en) * | 2015-07-08 | 2018-06-29 | 上海斐讯数据通信技术有限公司 | A kind of multicast group management method and system based on forwarding and control separation |
| CN105591764B (en) * | 2015-12-18 | 2018-12-11 | 新华三技术有限公司 | Multicast forwarding list item synchronous method and device |
| CN106713348B (en) * | 2017-01-17 | 2019-12-31 | 无锡雷华网络技术有限公司 | OLT multicast uplink protocol message forwarding method and system |
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| CN101510891A (en) * | 2009-04-03 | 2009-08-19 | 烽火通信科技股份有限公司 | Apparatus and method for implementing multicast by EPON access system |
| CN101808256A (en) * | 2010-04-14 | 2010-08-18 | 烽火通信科技股份有限公司 | Passive optical network system with multicast authentication and control functions and implementing method thereof |
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| CN1992707B (en) * | 2005-12-29 | 2012-05-23 | 上海贝尔阿尔卡特股份有限公司 | Fast restoration method of multicast service and network apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101510891A (en) * | 2009-04-03 | 2009-08-19 | 烽火通信科技股份有限公司 | Apparatus and method for implementing multicast by EPON access system |
| CN101808256A (en) * | 2010-04-14 | 2010-08-18 | 烽火通信科技股份有限公司 | Passive optical network system with multicast authentication and control functions and implementing method thereof |
Non-Patent Citations (1)
| Title |
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| 朱敏等.《基于VLAN的组播方案在EPON系统中的设计与实现》.《上海大学学报(自然科学版)》.2007,第13卷(第3期),第230-236页. * |
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